DataGridViewComboBoxColumn DataGridViewComboBoxColumn DataGridViewComboBoxColumn DataGridViewComboBoxColumn Class

定义

表示 DataGridViewComboBoxCell 对象的列。Represents a column of DataGridViewComboBoxCell objects.

public ref class DataGridViewComboBoxColumn : System::Windows::Forms::DataGridViewColumn
[System.Drawing.ToolboxBitmap(typeof(System.Windows.Forms.DataGridViewComboBoxColumn), "DataGridViewComboBoxColumn.bmp")]
[System.Drawing.ToolboxBitmap(typeof(System.Windows.Forms.DataGridViewComboBoxColumn), "DataGridViewComboBoxColumn")]
public class DataGridViewComboBoxColumn : System.Windows.Forms.DataGridViewColumn
type DataGridViewComboBoxColumn = class
    inherit DataGridViewColumn
Public Class DataGridViewComboBoxColumn
Inherits DataGridViewColumn
继承
属性

示例

下面的代码示例演示如何使用DataGridViewComboBoxColumn来帮助进行数据输入到TitleOfCourtesy列。The following code example demonstrates how to use a DataGridViewComboBoxColumn to aid in entering data into the TitleOfCourtesy column.

#using <System.Data.dll>
#using <System.Windows.Forms.dll>
#using <System.dll>
#using <System.Drawing.dll>

#using <System.Xml.dll>
#using <System.EnterpriseServices.dll>
#using <System.Transactions.dll>
using namespace System;
using namespace System::Data;
using namespace System::Data::SqlClient;
using namespace System::Windows::Forms;
using namespace System::Collections::Generic;
using namespace System::Drawing;

public ref class Employees : public Form
{
private:
    DataGridView^ DataGridView1;

private:
    DataGridView^ DataGridView2;

public:
    [STAThread]
    static void Main()
    {
        try
        {
            Application::EnableVisualStyles();
            Application::Run(gcnew Employees());
        }
        catch (Exception^ e)
        {
            MessageBox::Show(e->Message + e->StackTrace);
        }
    }

private:
    Dictionary<String^, bool>^ inOffice;

public:
    Employees()
    {
        DataGridView1 = gcnew DataGridView();
        DataGridView2 = gcnew DataGridView();
        connectionString =
            "Integrated Security=SSPI;Persist Security Info=False;" +
            "Initial Catalog=Northwind;Data Source=localhost";
        inOffice = gcnew Dictionary<String^, bool>;

        this->Load += gcnew EventHandler(this, &Employees::Form1_Load);
    }

private:
    void Form1_Load(System::Object^ /*sender*/, System::EventArgs^ /*e*/)
    {
        try
        {
            SetUpForm();
            SetUpDataGridView1();
            SetUpDataGridView2();
        }
        catch (SqlException^)
        {
            MessageBox::Show("The connection string <"
                + connectionString
                + "> failed to connect.  Modify it "
                + "to connect to a Northwind database accessible to "
                + "your system.",
                "ERROR", MessageBoxButtons::OK, MessageBoxIcon::Exclamation);
            Application::Exit();
        }
    }

private:
    void SetUpForm()
    {
        Size = System::Drawing::Size(800, 600);
        FlowLayoutPanel^ flowLayout = gcnew FlowLayoutPanel();
        flowLayout->FlowDirection = FlowDirection::TopDown;
        flowLayout->Dock = DockStyle::Fill;
        Controls->Add(flowLayout);

        flowLayout->Controls->Add(DataGridView1);
        flowLayout->Controls->Add(DataGridView2);
    }

private:
    void SetUpDataGridView2()
    {
        DataGridView2->Dock = DockStyle::Bottom;
        DataGridView2->TopLeftHeaderCell->Value = "Sales Details";
        DataGridView2->RowHeadersWidthSizeMode = 
            DataGridViewRowHeadersWidthSizeMode::AutoSizeToAllHeaders;
    }

private:
    void SetUpDataGridView1()
    {
        //DataGridView1.DataError += new 
          //  DataGridViewDataErrorEventHandler(DataGridView1_DataError);
        DataGridView1->CellContentClick += gcnew 
            DataGridViewCellEventHandler(this, &Employees::DataGridView1_CellContentClick);
        DataGridView1->CellValuePushed += gcnew 
            DataGridViewCellValueEventHandler(this, &Employees::DataGridView1_CellValuePushed);
        DataGridView1->CellValueNeeded += gcnew 
            DataGridViewCellValueEventHandler(this, &Employees::DataGridView1_CellValueNeeded);

        // Virtual mode is turned on so that the
        // unbound DataGridViewCheckBoxColumn will
        // keep its state when the bound columns are
        // sorted.       
        DataGridView1->VirtualMode = true;
        DataGridView1->AutoSize = true;
        DataGridView1->DataSource = Populate("SELECT * FROM Employees");
        DataGridView1->TopLeftHeaderCell->Value = "Employees";
        DataGridView1->RowHeadersWidthSizeMode = 
            DataGridViewRowHeadersWidthSizeMode::AutoSizeToAllHeaders;
        DataGridView1->ColumnHeadersHeightSizeMode = 
            DataGridViewColumnHeadersHeightSizeMode::AutoSize;
        DataGridView1->AutoSizeColumnsMode = 
            DataGridViewAutoSizeColumnsMode::AllCells;
        DataGridView1->AllowUserToAddRows = false;
        DataGridView1->AllowUserToDeleteRows = false;

        // The below autogenerated column is removed so 
        // a DataGridViewComboboxColumn could be used instead.
        DataGridView1->Columns->Remove(ColumnName::TitleOfCourtesy.ToString());
        DataGridView1->Columns->Remove(ColumnName::ReportsTo.ToString());

        AddLinkColumn();
        AddComboBoxColumns();
        AddButtonColumn();
        AddOutOfOfficeColumn();
    }

private:
    void AddComboBoxColumns()
    {
        DataGridViewComboBoxColumn^ comboboxColumn;
        comboboxColumn = CreateComboBoxColumn();
        SetAlternateChoicesUsingDataSource(comboboxColumn);
        comboboxColumn->HeaderText = "TitleOfCourtesy (via DataSource property)";
        DataGridView1->Columns->Insert(0, comboboxColumn);

        comboboxColumn = CreateComboBoxColumn();
        SetAlternateChoicesUsingItems(comboboxColumn);
        comboboxColumn->HeaderText = "TitleOfCourtesy (via Items property)";
        // Tack this example column onto the end.
        DataGridView1->Columns->Add(comboboxColumn);
    }

private:
    void AddLinkColumn()
    {
        DataGridViewLinkColumn^ links = gcnew DataGridViewLinkColumn();

		links->UseColumnTextForLinkValue = true;
        links->HeaderText = ColumnName::ReportsTo.ToString();
        links->DataPropertyName = ColumnName::ReportsTo.ToString();
        links->ActiveLinkColor = Color::White;
        links->LinkBehavior = LinkBehavior::SystemDefault;
        links->LinkColor = Color::Blue;
        links->TrackVisitedState = true;
        links->VisitedLinkColor = Color::YellowGreen;

        DataGridView1->Columns->Add(links);
    }

private:
    void SetAlternateChoicesUsingItems(
        DataGridViewComboBoxColumn^ comboboxColumn)
    {
        comboboxColumn->Items->AddRange("Mr.", "Ms.", "Mrs.", "Dr.");
    }

private:
    DataGridViewComboBoxColumn^ CreateComboBoxColumn()
    {
        DataGridViewComboBoxColumn^ column =
            gcnew DataGridViewComboBoxColumn();
        {
            column->DataPropertyName = ColumnName::TitleOfCourtesy.ToString();
            column->HeaderText = ColumnName::TitleOfCourtesy.ToString();
            column->DropDownWidth = 160;
            column->Width = 90;
            column->MaxDropDownItems = 3;
            column->FlatStyle = FlatStyle::Flat;
        }
        return column;
    }

private:
    void SetAlternateChoicesUsingDataSource(DataGridViewComboBoxColumn^ comboboxColumn)
    {
        {
            comboboxColumn->DataSource = RetrieveAlternativeTitles();
            comboboxColumn->ValueMember = ColumnName::TitleOfCourtesy.ToString();
            comboboxColumn->DisplayMember = comboboxColumn->ValueMember;
        }
    }

private:
    DataTable^ RetrieveAlternativeTitles()
    {
        return Populate("SELECT distinct TitleOfCourtesy FROM Employees");
    }

    String^ connectionString;

private:
    DataTable^ Populate(String^ sqlCommand)
    {
        SqlConnection^ northwindConnection = gcnew SqlConnection(connectionString);
        northwindConnection->Open();

        SqlCommand^ command = gcnew SqlCommand(sqlCommand, northwindConnection);
        SqlDataAdapter^ adapter = gcnew SqlDataAdapter();
        adapter->SelectCommand = command;

        DataTable^ table = gcnew DataTable();
        adapter->Fill(table);

        return table;
    }

	// Using an enum provides some abstraction between column index
    // and column name along with compile time checking, and gives
    // a handy place to store the column names.
    enum class ColumnName
    {
        EmployeeID,
        LastName,
        FirstName,
        Title,
        TitleOfCourtesy,
        BirthDate,
        HireDate,
        Address,
        City,
        Region,
        PostalCode,
        Country,
        HomePhone,
        Extension,
        Photo,
        Notes,
        ReportsTo,
        PhotoPath,
        OutOfOffice
    };

private:
    void AddButtonColumn()
    {
        DataGridViewButtonColumn^ buttons = gcnew DataGridViewButtonColumn();
        {
            buttons->HeaderText = "Sales";
            buttons->Text = "Sales";
            buttons->UseColumnTextForButtonValue = true;
            buttons->AutoSizeMode =
                DataGridViewAutoSizeColumnMode::AllCells;
            buttons->FlatStyle = FlatStyle::Standard;
            buttons->CellTemplate->Style->BackColor = Color::Honeydew;
            buttons->DisplayIndex = 0;
        }

        DataGridView1->Columns->Add(buttons);

    }

private:
    void AddOutOfOfficeColumn()
    {
        DataGridViewCheckBoxColumn^ column = gcnew DataGridViewCheckBoxColumn();
        {
            column->HeaderText = ColumnName::OutOfOffice.ToString();
            column->Name = ColumnName::OutOfOffice.ToString();
            column->AutoSizeMode = 
                DataGridViewAutoSizeColumnMode::DisplayedCells;
            column->FlatStyle = FlatStyle::Standard;
            column->ThreeState = true;
            column->CellTemplate = gcnew DataGridViewCheckBoxCell();
            column->CellTemplate->Style->BackColor = Color::Beige;
        }

        DataGridView1->Columns->Insert(0, column);
    }

private:
    void PopulateSales(DataGridViewCellEventArgs^ buttonClick)
    {

        String^ employeeID = DataGridView1->Rows[buttonClick->RowIndex]
            ->Cells[ColumnName::EmployeeID.ToString()]->Value->ToString();
        DataGridView2->DataSource = Populate("SELECT * FROM Orders WHERE EmployeeID = " + employeeID);
    }

    #pragma region "SQL Error handling"
private:
    void DataGridView1_DataError(Object^ sender, DataGridViewDataErrorEventArgs^ anError)
    {

        MessageBox::Show("Error happened " + anError->Context.ToString());

        if (anError->Context == DataGridViewDataErrorContexts::Commit)
        {
            MessageBox::Show("Commit error");
        }
        if (anError->Context == DataGridViewDataErrorContexts::CurrentCellChange)
        {
            MessageBox::Show("Cell change");
        }
        if (anError->Context == DataGridViewDataErrorContexts::Parsing)
        {
            MessageBox::Show("parsing error");
        }
        if (anError->Context == DataGridViewDataErrorContexts::LeaveControl)
        {
            MessageBox::Show("leave control error");
        }

        if (dynamic_cast<ConstraintException^>(anError->Exception) != nullptr)
        {
            DataGridView^ view = (DataGridView^)sender;
            view->Rows[anError->RowIndex]->ErrorText = "an error";
            view->Rows[anError->RowIndex]->Cells[anError->ColumnIndex]->ErrorText = "an error";

            anError->ThrowException = false;
        }
    }
    #pragma endregion

private:
    void DataGridView1_CellContentClick(Object^ /*sender*/, DataGridViewCellEventArgs^ e)
    {

        if (IsANonHeaderLinkCell(e))
        {
            MoveToLinked(e);
        }
        else if (IsANonHeaderButtonCell(e))
        {
            PopulateSales(e);
        }
    }

private:
    void MoveToLinked(DataGridViewCellEventArgs^ e)
    {
        String^ employeeId;
        Object^ value = DataGridView1->Rows[e->RowIndex]->Cells[e->ColumnIndex]->Value;
        if (dynamic_cast<DBNull^>(value) != nullptr) { return; }

        employeeId = value->ToString();
        DataGridViewCell^ boss = RetrieveSuperiorsLastNameCell(employeeId);
        if (boss != nullptr)
        {
            DataGridView1->CurrentCell = boss;
        }
    }

private:
    bool IsANonHeaderLinkCell(DataGridViewCellEventArgs^ cellEvent)
    {
        if (dynamic_cast<DataGridViewLinkColumn^>(DataGridView1->Columns[cellEvent->ColumnIndex]) != nullptr
             &&
            cellEvent->RowIndex != -1)
        { return true; }
        else { return false; }
    }

private:
    bool IsANonHeaderButtonCell(DataGridViewCellEventArgs^ cellEvent)
    {
        if (dynamic_cast<DataGridViewButtonColumn^>(DataGridView1->Columns[cellEvent->ColumnIndex]) != nullptr
             &&
            cellEvent->RowIndex != -1)
        { return true; }
        else { return (false); }
    }

private:
    DataGridViewCell^ RetrieveSuperiorsLastNameCell(String^ employeeId)
    {

        for each (DataGridViewRow^ row in DataGridView1->Rows)
        {
            if (row->IsNewRow) { return nullptr; }
            if (row->Cells[ColumnName::EmployeeID.ToString()]->Value->ToString()->Equals(employeeId))
            {
                return row->Cells[ColumnName::LastName.ToString()];
            }
        }
        return nullptr;
    }

    #pragma region "checkbox state"

private:
    void DataGridView1_CellValuePushed(Object^ sender,
        DataGridViewCellValueEventArgs^ e)
    {
        if (IsCheckBoxColumn(e->ColumnIndex))
        {
            String^ employeeId = GetKey(e);
            if (!inOffice->ContainsKey(employeeId))
            {
                inOffice->Add(employeeId, (Boolean)e->Value);
            }
            else
            {
                inOffice[employeeId] = (Boolean)e->Value;
            }
        }
    }

private:
    String^ GetKey(DataGridViewCellValueEventArgs^ cell)
    {
        return DataGridView1->Rows[cell->RowIndex]->
            Cells[ColumnName::EmployeeID.ToString()]->Value->ToString();
    }

private:
    void DataGridView1_CellValueNeeded(Object^ sender,
        DataGridViewCellValueEventArgs^ e)
    {

        if (IsCheckBoxColumn(e->ColumnIndex))
        {
            String^ employeeId = GetKey(e);
            if (!inOffice->ContainsKey(employeeId))
            {
                bool defaultValue = false;
                inOffice->Add(employeeId, defaultValue);
            }

            e->Value = inOffice[employeeId];
        }
    }

private:
    bool IsCheckBoxColumn(int columnIndex)
    {
        DataGridViewColumn^ outOfOfficeColumn =
            DataGridView1->Columns[ColumnName::OutOfOffice.ToString()];
        return (DataGridView1->Columns[columnIndex] == outOfOfficeColumn);
    }
    #pragma endregion
};

int main()
{
    Employees::Main();
}
using System;
using System.Data;
using System.Data.SqlClient;
using System.Windows.Forms;
using System.Collections.Generic;
using System.Drawing;

public class Employees : Form
{
    private DataGridView DataGridView1 = new DataGridView();
    private DataGridView DataGridView2 = new DataGridView();

    [STAThread]
    public static void Main()
    {
        try
        {
            Application.EnableVisualStyles();
            Application.Run(new Employees());
        }
        catch (Exception e)
        {
            MessageBox.Show(e.Message + e.StackTrace);
        }
    }

    public Employees()
    {
        this.Load += new EventHandler(Form1_Load);
    }

    private void Form1_Load(System.Object sender, System.EventArgs e)
    {
        try
        {
            SetUpForm();
            SetUpDataGridView1();
            SetUpDataGridView2();
        }
        catch (SqlException)
        {
            MessageBox.Show("The connection string <"
                + connectionString
                + "> failed to connect.  Modify it "
                + "to connect to a Northwind database accessible to "
                + "your system.",
                "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            Application.Exit();
        }
    }

    private void SetUpForm()
    {
        Size = new Size(800, 600);
        FlowLayoutPanel flowLayout = new FlowLayoutPanel();
        flowLayout.FlowDirection = FlowDirection.TopDown;
        flowLayout.Dock = DockStyle.Fill;
        Controls.Add(flowLayout);
        Text = "DataGridView columns demo";

        flowLayout.Controls.Add(DataGridView1);
        flowLayout.Controls.Add(DataGridView2);
    }

    private void SetUpDataGridView2()
    {
        DataGridView2.Dock = DockStyle.Bottom;
        DataGridView2.TopLeftHeaderCell.Value = "Sales Details";
        DataGridView2.RowHeadersWidthSizeMode = 
            DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders;
    }

    private void SetUpDataGridView1()
    {
        DataGridView1.DataError += new 
            DataGridViewDataErrorEventHandler(DataGridView1_DataError);
        DataGridView1.CellContentClick += new 
            DataGridViewCellEventHandler(DataGridView1_CellContentClick);
        DataGridView1.CellValuePushed += new 
            DataGridViewCellValueEventHandler(DataGridView1_CellValuePushed);
        DataGridView1.CellValueNeeded += new 
            DataGridViewCellValueEventHandler(DataGridView1_CellValueNeeded);

        // Virtual mode is turned on so that the
        // unbound DataGridViewCheckBoxColumn will
        // keep its state when the bound columns are
        // sorted.       
        DataGridView1.VirtualMode = true;
        DataGridView1.AutoSize = true;
        DataGridView1.DataSource = Populate("SELECT * FROM Employees");
        DataGridView1.TopLeftHeaderCell.Value = "Employees";
        DataGridView1.RowHeadersWidthSizeMode = 
            DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders;
        DataGridView1.ColumnHeadersHeightSizeMode = 
            DataGridViewColumnHeadersHeightSizeMode.AutoSize;
        DataGridView1.AutoSizeColumnsMode = 
            DataGridViewAutoSizeColumnsMode.AllCells;
        DataGridView1.AllowUserToAddRows = false;
        DataGridView1.AllowUserToDeleteRows = false;

        // The below autogenerated column is removed so 
        // a DataGridViewComboboxColumn could be used instead.
        DataGridView1.Columns.Remove(ColumnName.TitleOfCourtesy.ToString());
        DataGridView1.Columns.Remove(ColumnName.ReportsTo.ToString());

        AddLinkColumn();
        AddComboBoxColumns();
        AddButtonColumn();
        AddOutOfOfficeColumn();
    }

    private void AddComboBoxColumns()
    {
        DataGridViewComboBoxColumn comboboxColumn;
        comboboxColumn = CreateComboBoxColumn();
        SetAlternateChoicesUsingDataSource(comboboxColumn);
        comboboxColumn.HeaderText = "TitleOfCourtesy (via DataSource property)";
        DataGridView1.Columns.Insert(0, comboboxColumn);

        comboboxColumn = CreateComboBoxColumn();
        SetAlternateChoicesUsingItems(comboboxColumn);
        comboboxColumn.HeaderText = "TitleOfCourtesy (via Items property)";
        // Tack this example column onto the end.
        DataGridView1.Columns.Add(comboboxColumn);
    }

    private void AddLinkColumn()
    {
        DataGridViewLinkColumn links = new DataGridViewLinkColumn();

        links.UseColumnTextForLinkValue = true;
        links.HeaderText = ColumnName.ReportsTo.ToString();
        links.DataPropertyName = ColumnName.ReportsTo.ToString();
        links.ActiveLinkColor = Color.White;
        links.LinkBehavior = LinkBehavior.SystemDefault;
        links.LinkColor = Color.Blue;
        links.TrackVisitedState = true;
        links.VisitedLinkColor = Color.YellowGreen;

        DataGridView1.Columns.Add(links);
    }

    private static void SetAlternateChoicesUsingItems(
        DataGridViewComboBoxColumn comboboxColumn)
    {
        comboboxColumn.Items.AddRange("Mr.", "Ms.", "Mrs.", "Dr.");
    }

    private DataGridViewComboBoxColumn CreateComboBoxColumn()
    {
        DataGridViewComboBoxColumn column =
            new DataGridViewComboBoxColumn();
        {
            column.DataPropertyName = ColumnName.TitleOfCourtesy.ToString();
            column.HeaderText = ColumnName.TitleOfCourtesy.ToString();
            column.DropDownWidth = 160;
            column.Width = 90;
            column.MaxDropDownItems = 3;
            column.FlatStyle = FlatStyle.Flat;
        }
        return column;
    }

    private void SetAlternateChoicesUsingDataSource(DataGridViewComboBoxColumn comboboxColumn)
    {
        {
            comboboxColumn.DataSource = RetrieveAlternativeTitles();
            comboboxColumn.ValueMember = ColumnName.TitleOfCourtesy.ToString();
            comboboxColumn.DisplayMember = comboboxColumn.ValueMember;
        }
    }

    private DataTable RetrieveAlternativeTitles()
    {
        return Populate("SELECT distinct TitleOfCourtesy FROM Employees");
    }

    string connectionString =
        "Integrated Security=SSPI;Persist Security Info=False;" +
        "Initial Catalog=Northwind;Data Source=localhost";

    private DataTable Populate(string sqlCommand)
    {
        SqlConnection northwindConnection = new SqlConnection(connectionString);
        northwindConnection.Open();

        SqlCommand command = new SqlCommand(sqlCommand, northwindConnection);
        SqlDataAdapter adapter = new SqlDataAdapter();
        adapter.SelectCommand = command;

        DataTable table = new DataTable();
        table.Locale = System.Globalization.CultureInfo.InvariantCulture;
        adapter.Fill(table);

        return table;
    }

    // Using an enum provides some abstraction between column index
    // and column name along with compile time checking, and gives
    // a handy place to store the column names.
    enum ColumnName
    {
        EmployeeId,
        LastName,
        FirstName,
        Title,
        TitleOfCourtesy,
        BirthDate,
        HireDate,
        Address,
        City,
        Region,
        PostalCode,
        Country,
        HomePhone,
        Extension,
        Photo,
        Notes,
        ReportsTo,
        PhotoPath,
        OutOfOffice
    };

    private void AddButtonColumn()
    {
        DataGridViewButtonColumn buttons = new DataGridViewButtonColumn();
        {
            buttons.HeaderText = "Sales";
            buttons.Text = "Sales";
            buttons.UseColumnTextForButtonValue = true;
            buttons.AutoSizeMode =
                DataGridViewAutoSizeColumnMode.AllCells;
            buttons.FlatStyle = FlatStyle.Standard;
            buttons.CellTemplate.Style.BackColor = Color.Honeydew;
            buttons.DisplayIndex = 0;
        }

        DataGridView1.Columns.Add(buttons);

    }

    private void AddOutOfOfficeColumn()
    {
        DataGridViewCheckBoxColumn column = new DataGridViewCheckBoxColumn();
        {
            column.HeaderText = ColumnName.OutOfOffice.ToString();
            column.Name = ColumnName.OutOfOffice.ToString();
            column.AutoSizeMode = 
                DataGridViewAutoSizeColumnMode.DisplayedCells;
            column.FlatStyle = FlatStyle.Standard;
            column.ThreeState = true;
            column.CellTemplate = new DataGridViewCheckBoxCell();
            column.CellTemplate.Style.BackColor = Color.Beige;
        }

        DataGridView1.Columns.Insert(0, column);
    }

    private void PopulateSales(DataGridViewCellEventArgs buttonClick)
    {

        string employeeId = DataGridView1.Rows[buttonClick.RowIndex]
            .Cells[ColumnName.EmployeeId.ToString()].Value.ToString();
        DataGridView2.DataSource = Populate("SELECT * FROM Orders WHERE EmployeeId = " + employeeId);
    }

    #region "SQL Error handling"
    private void DataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs anError)
    {

        MessageBox.Show("Error happened " + anError.Context.ToString());

        if (anError.Context == DataGridViewDataErrorContexts.Commit)
        {
            MessageBox.Show("Commit error");
        }
        if (anError.Context == DataGridViewDataErrorContexts.CurrentCellChange)
        {
            MessageBox.Show("Cell change");
        }
        if (anError.Context == DataGridViewDataErrorContexts.Parsing)
        {
            MessageBox.Show("parsing error");
        }
        if (anError.Context == DataGridViewDataErrorContexts.LeaveControl)
        {
            MessageBox.Show("leave control error");
        }

        if ((anError.Exception) is ConstraintException)
        {
            DataGridView view = (DataGridView)sender;
            view.Rows[anError.RowIndex].ErrorText = "an error";
            view.Rows[anError.RowIndex].Cells[anError.ColumnIndex].ErrorText = "an error";

            anError.ThrowException = false;
        }
    }
    #endregion

    private void DataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
    {

        if (IsANonHeaderLinkCell(e))
        {
            MoveToLinked(e);
        }
        else if (IsANonHeaderButtonCell(e))
        {
            PopulateSales(e);
        }
    }

    private void MoveToLinked(DataGridViewCellEventArgs e)
    {
        string employeeId;
        object value = DataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value;
        if (value is DBNull) { return; }

        employeeId = value.ToString();
        DataGridViewCell boss = RetrieveSuperiorsLastNameCell(employeeId);
        if (boss != null)
        {
            DataGridView1.CurrentCell = boss;
        }
    }

    private bool IsANonHeaderLinkCell(DataGridViewCellEventArgs cellEvent)
    {
        if (DataGridView1.Columns[cellEvent.ColumnIndex] is
            DataGridViewLinkColumn &&
            cellEvent.RowIndex != -1)
        { return true; }
        else { return false; }
    }

    private bool IsANonHeaderButtonCell(DataGridViewCellEventArgs cellEvent)
    {
        if (DataGridView1.Columns[cellEvent.ColumnIndex] is
            DataGridViewButtonColumn &&
            cellEvent.RowIndex != -1)
        { return true; }
        else { return (false); }
    }

    private DataGridViewCell RetrieveSuperiorsLastNameCell(string employeeId)
    {

        foreach (DataGridViewRow row in DataGridView1.Rows)
        {
            if (row.IsNewRow) { return null; }
            if (row.Cells[ColumnName.EmployeeId.ToString()].Value.ToString().Equals(employeeId))
            {
                return row.Cells[ColumnName.LastName.ToString()];
            }
        }
        return null;
    }

    #region "checkbox state"
    Dictionary<string, bool> inOffice = new Dictionary<string, bool>();
    private void DataGridView1_CellValuePushed(object sender,
        DataGridViewCellValueEventArgs e)
    {
        if (IsCheckBoxColumn(e.ColumnIndex))
        {
            string employeeId = GetKey(e);
            if (!inOffice.ContainsKey(employeeId))
            {
                inOffice.Add(employeeId, (Boolean)e.Value);
            }
            else
            {
                inOffice[employeeId] = (Boolean)e.Value;
            }
        }
    }

    private string GetKey(DataGridViewCellValueEventArgs cell)
    {
        return DataGridView1.Rows[cell.RowIndex].
            Cells[ColumnName.EmployeeId.ToString()].Value.ToString();
    }

    private void DataGridView1_CellValueNeeded(object sender,
        DataGridViewCellValueEventArgs e)
    {

        if (IsCheckBoxColumn(e.ColumnIndex))
        {
            string employeeId = GetKey(e);
            if (!inOffice.ContainsKey(employeeId))
            {
                bool defaultValue = false;
                inOffice.Add(employeeId, defaultValue);
            }

            e.Value = inOffice[employeeId];
        }
    }

    private bool IsCheckBoxColumn(int columnIndex)
    {
        DataGridViewColumn outOfOfficeColumn =
            DataGridView1.Columns[ColumnName.OutOfOffice.ToString()];
        return (DataGridView1.Columns[columnIndex] == outOfOfficeColumn);
    }
    #endregion
}
Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports System.Windows.Forms
Imports System.Collections.Generic
Imports System.Drawing

Public Class Employees
    Inherits System.Windows.Forms.Form

    Private WithEvents DataGridView1 As New DataGridView
    Private WithEvents DataGridView2 As New DataGridView

    <STAThreadAttribute()> _
    Public Shared Sub Main()
        Try
            Application.EnableVisualStyles()
            Application.Run(New Employees())
        Catch e As Exception
            MessageBox.Show(e.Message & e.StackTrace)
        End Try
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles MyBase.Load

        Try
            SetUpForm()
            SetUpDataGridView1()
            SetUpDataGridView2()
        Catch ex As SqlException
            MessageBox.Show("The connection string <" _
                & connectionString _
                & "> failed to connect.  Modify it to connect to " _
                & "a Northwind database accessible to your system.", _
                "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
            Application.Exit()
        End Try
    End Sub

    Private Sub SetUpForm()
        Size = New Size(800, 600)
        Dim flowLayout As New FlowLayoutPanel()
        flowLayout.FlowDirection = FlowDirection.TopDown
        flowLayout.Dock = DockStyle.Fill
        Controls.Add(flowLayout)
        Text = "DataGridView columns demo"

        flowLayout.Controls.Add(DataGridView1)
        flowLayout.Controls.Add(DataGridView2)
    End Sub

    Private Sub SetUpDataGridView2()
        DataGridView2.Dock = DockStyle.Bottom
        DataGridView2.TopLeftHeaderCell.Value = "Sales Details"
        DataGridView2.RowHeadersWidthSizeMode = _
        DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders
    End Sub

    Private Sub SetUpDataGridView1()
        ' Virtual mode is turned on so that the
        ' unbound DataGridViewCheckBoxColumn will
        ' keep its state when the bound columns are
        ' sorted.
        DataGridView1.VirtualMode = True

        DataGridView1.AutoSize = True
        DataGridView1.DataSource = _
            Populate("SELECT * FROM Employees")
        DataGridView1.TopLeftHeaderCell.Value = "Employees"
        DataGridView1.RowHeadersWidthSizeMode = _
            DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders
        DataGridView1.ColumnHeadersHeightSizeMode = _
            DataGridViewColumnHeadersHeightSizeMode.AutoSize
        DataGridView1.AutoSizeColumnsMode = _
            DataGridViewAutoSizeColumnsMode.AllCells
        DataGridView1.AllowUserToAddRows = False
        DataGridView1.AllowUserToDeleteRows = False

        ' The below autogenerated column is removed so 
        ' a DataGridViewComboboxColumn could be used instead.
        DataGridView1.Columns.Remove( _
            ColumnName.TitleOfCourtesy.ToString())
        DataGridView1.Columns.Remove(ColumnName.ReportsTo.ToString())

        AddLinkColumn()
        AddComboBoxColumns()
        AddButtonColumn()
        AddOutOfOfficeColumn()
    End Sub

    Private Sub AddComboBoxColumns()
        Dim comboboxColumn As DataGridViewComboBoxColumn
        comboboxColumn = CreateComboBoxColumn()
        SetAlternateChoicesUsingDataSource(comboboxColumn)
        comboboxColumn.HeaderText = _
            "TitleOfCourtesy (via DataSource property)"
        DataGridView1.Columns.Insert(0, comboboxColumn)

        comboboxColumn = CreateComboBoxColumn()
        SetAlternateChoicesUsingItems(comboboxColumn)
        comboboxColumn.HeaderText = _
            "TitleOfCourtesy (via Items property)"
        ' Tack this example column onto the end.
        DataGridView1.Columns.Add(comboboxColumn)
    End Sub

    Private Sub AddLinkColumn()

        Dim links As New DataGridViewLinkColumn()
        With links
            .UseColumnTextForLinkValue = True
            .HeaderText = ColumnName.ReportsTo.ToString()
            .DataPropertyName = ColumnName.ReportsTo.ToString()
            .ActiveLinkColor = Color.White
            .LinkBehavior = LinkBehavior.SystemDefault
            .LinkColor = Color.Blue
            .TrackVisitedState = True
            .VisitedLinkColor = Color.YellowGreen
        End With
        DataGridView1.Columns.Add(links)
    End Sub

    Private Shared Sub SetAlternateChoicesUsingItems( _
        ByVal comboboxColumn As DataGridViewComboBoxColumn)

        comboboxColumn.Items.AddRange("Mr.", "Ms.", "Mrs.", "Dr.")

    End Sub

    Private Function CreateComboBoxColumn() _
        As DataGridViewComboBoxColumn
        Dim column As New DataGridViewComboBoxColumn()

        With column
            .DataPropertyName = ColumnName.TitleOfCourtesy.ToString()
            .HeaderText = ColumnName.TitleOfCourtesy.ToString()
            .DropDownWidth = 160
            .Width = 90
            .MaxDropDownItems = 3
            .FlatStyle = FlatStyle.Flat
        End With
        Return column
    End Function

    Private Sub SetAlternateChoicesUsingDataSource( _
        ByVal comboboxColumn As DataGridViewComboBoxColumn)
        With comboboxColumn
            .DataSource = RetrieveAlternativeTitles()
            .ValueMember = ColumnName.TitleOfCourtesy.ToString()
            .DisplayMember = .ValueMember
        End With
    End Sub

    Private Function RetrieveAlternativeTitles() As DataTable
        Return Populate( _
            "SELECT distinct TitleOfCourtesy FROM Employees")
    End Function

    Private connectionString As String = _
            "Integrated Security=SSPI;Persist Security Info=False;" _
            & "Initial Catalog=Northwind;Data Source=localhost"

    Private Function Populate(ByVal sqlCommand As String) As DataTable
        Dim northwindConnection As New SqlConnection(connectionString)
        northwindConnection.Open()

        Dim command As New SqlCommand(sqlCommand, _
            northwindConnection)
        Dim adapter As New SqlDataAdapter()
        adapter.SelectCommand = command
        Dim table As New DataTable()
        table.Locale = System.Globalization.CultureInfo.InvariantCulture
        adapter.Fill(table)

        Return table
    End Function

    ' Using an enum provides some abstraction between column index
    ' and column name along with compile time checking, and gives
    ' a handy place to store the column names.
    Enum ColumnName
        EmployeeId
        LastName
        FirstName
        Title
        TitleOfCourtesy
        BirthDate
        HireDate
        Address
        City
        Region
        PostalCode
        Country
        HomePhone
        Extension
        Photo
        Notes
        ReportsTo
        PhotoPath
        OutOfOffice
    End Enum

    Private Sub AddButtonColumn()
        Dim buttons As New DataGridViewButtonColumn()
        With buttons
            .HeaderText = "Sales"
            .Text = "Sales"
            .UseColumnTextForButtonValue = True
            .AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells
            .FlatStyle = FlatStyle.Standard
            .CellTemplate.Style.BackColor = Color.Honeydew
            .DisplayIndex = 0
        End With

        DataGridView1.Columns.Add(buttons)

    End Sub

    Private Sub AddOutOfOfficeColumn()
        Dim column As New DataGridViewCheckBoxColumn()
        With column
            .HeaderText = ColumnName.OutOfOffice.ToString()
            .Name = ColumnName.OutOfOffice.ToString()
            .AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells
            .FlatStyle = FlatStyle.Standard
            .CellTemplate = New DataGridViewCheckBoxCell()
            .CellTemplate.Style.BackColor = Color.Beige
        End With

        DataGridView1.Columns.Insert(0, column)
    End Sub

    Private Sub PopulateSales( _
        ByVal buttonClick As DataGridViewCellEventArgs)

        Dim employeeId As String = _
            DataGridView1.Rows(buttonClick.RowIndex). _
            Cells(ColumnName.EmployeeId.ToString()).Value().ToString()
        DataGridView2.DataSource = Populate( _
            "SELECT * FROM Orders WHERE EmployeeId = " & employeeId)
    End Sub

#Region "SQL Error handling"
    Private Sub DataGridView1_DataError(ByVal sender As Object, _
    ByVal e As DataGridViewDataErrorEventArgs) _
    Handles DataGridView1.DataError

        MessageBox.Show("Error happened " _
            & e.Context.ToString())

        If (e.Context = DataGridViewDataErrorContexts.Commit) _
            Then
            MessageBox.Show("Commit error")
        End If
        If (e.Context = DataGridViewDataErrorContexts _
            .CurrentCellChange) Then
            MessageBox.Show("Cell change")
        End If
        If (e.Context = DataGridViewDataErrorContexts.Parsing) _
            Then
            MessageBox.Show("parsing error")
        End If
        If (e.Context = _
            DataGridViewDataErrorContexts.LeaveControl) Then
            MessageBox.Show("leave control error")
        End If

        If (TypeOf (e.Exception) Is ConstraintException) Then
            Dim view As DataGridView = CType(sender, DataGridView)
            view.Rows(e.RowIndex).ErrorText = "an error"
            view.Rows(e.RowIndex).Cells(e.ColumnIndex) _
                .ErrorText = "an error"

            e.ThrowException = False
        End If
    End Sub
#End Region

    Private Sub DataGridView1_CellContentClick(ByVal sender As Object, _
        ByVal e As DataGridViewCellEventArgs) _
        Handles DataGridView1.CellContentClick

        If IsANonHeaderLinkCell(e) Then
            MoveToLinked(e)
        ElseIf IsANonHeaderButtonCell(e) Then
            PopulateSales(e)
        End If
    End Sub

    Private Sub MoveToLinked(ByVal e As DataGridViewCellEventArgs)
        Dim employeeId As String
        Dim value As Object = DataGridView1.Rows(e.RowIndex). _
            Cells(e.ColumnIndex).Value
        If value.GetType Is GetType(DBNull) Then Return

        employeeId = CType(value, String)
        Dim boss As DataGridViewCell = _
            RetrieveSuperiorsLastNameCell(employeeId)
        If boss IsNot Nothing Then
            DataGridView1.CurrentCell = boss
        End If
    End Sub

    Private Function IsANonHeaderLinkCell(ByVal cellEvent As _
        DataGridViewCellEventArgs) As Boolean

        If TypeOf DataGridView1.Columns(cellEvent.ColumnIndex) _
            Is DataGridViewLinkColumn _
            AndAlso Not cellEvent.RowIndex = -1 Then _
            Return True Else Return False

    End Function

    Private Function IsANonHeaderButtonCell(ByVal cellEvent As _
        DataGridViewCellEventArgs) As Boolean

        If TypeOf DataGridView1.Columns(cellEvent.ColumnIndex) _
            Is DataGridViewButtonColumn _
            AndAlso Not cellEvent.RowIndex = -1 Then _
            Return True Else Return (False)

    End Function

    Private Function RetrieveSuperiorsLastNameCell( _
        ByVal employeeId As String) As DataGridViewCell

        For Each row As DataGridViewRow In DataGridView1.Rows
            If row.IsNewRow Then Return Nothing
            If row.Cells(ColumnName.EmployeeId.ToString()). _
                Value.ToString().Equals(employeeId) Then
                Return row.Cells(ColumnName.LastName.ToString())
            End If
        Next
        Return Nothing
    End Function

#Region "checkbox state"
    Dim inOffice As New Dictionary(Of String, Boolean)
    Private Sub DataGridView1_CellValuePushed(ByVal sender As Object, _
     ByVal e As DataGridViewCellValueEventArgs) _
        Handles DataGridView1.CellValuePushed

        If IsCheckBoxColumn(e.ColumnIndex) Then
            Dim employeeId As String = GetKey(e)
            If Not inOffice.ContainsKey(employeeId) Then
                inOffice.Add(employeeId, CType(e.Value, Boolean))
            Else
                inOffice.Item(employeeId) = CType(e.Value, Boolean)
            End If
        End If
    End Sub

    Private Function GetKey(ByVal cell As DataGridViewCellValueEventArgs) As String
        Return DataGridView1.Rows(cell.RowIndex).Cells( _
            ColumnName.EmployeeId.ToString()).Value().ToString()
    End Function

    Private Sub DataGridView1_CellValueNeeded(ByVal sender As Object, _
     ByVal e As DataGridViewCellValueEventArgs) _
        Handles DataGridView1.CellValueNeeded

        If IsCheckBoxColumn(e.ColumnIndex) Then
            Dim employeeId As String = GetKey(e)
            If Not inOffice.ContainsKey(employeeId) Then
                Dim defaultValue As Boolean = False
                inOffice.Add(employeeId, defaultValue)
            End If

            e.Value = inOffice.Item(employeeId)
        End If
    End Sub

    Private Function IsCheckBoxColumn(ByVal columnIndex As Integer) As Boolean

        Dim outOfOfficeColumn As DataGridViewColumn = _
            DataGridView1.Columns(ColumnName.OutOfOffice.ToString())
        Return (DataGridView1.Columns(columnIndex) Is outOfOfficeColumn)

    End Function
#End Region

End Class

注解

DataGridViewComboBoxColumn类是种特殊的类型的DataGridViewColumn用于以逻辑方式主机使用户能够从选项列表中选择值的单元。The DataGridViewComboBoxColumn class is a specialized type of DataGridViewColumn used to logically host cells that enable users to select values from a list of choices. 一个DataGridViewComboBoxColumn都有一个关联DataGridViewComboBoxCell中每个DataGridViewRow的相交。A DataGridViewComboBoxColumn has an associated DataGridViewComboBoxCell in every DataGridViewRow that intersects it.

您可以通过设置手动填充单元格及其Value属性。You can populate the cells manually by setting their Value properties. 或者,可以将列绑定到数据源由DataGridView.DataSource属性。Alternatively, you can bind the column to the data source indicated by the DataGridView.DataSource property. 如果DataGridView是绑定到数据库表,请将列设置DataPropertyName属性到表中的列的名称。If the DataGridView is bound to a database table, set the column DataPropertyName property to the name of a column in the table. 如果DataGridView是绑定到的对象的集合,请将DataPropertyName属性设置为对象属性的名称。If the DataGridView is bound to a collection of objects, set the DataPropertyName property to the name of an object property.

您可以通过将值添加到手动填充列的下拉列表Items集合。You can populate the column drop-down list manually by adding values to the Items collection. 或者,通过将列设置,到其自己数据源绑定下拉列表DataSource属性。Alternatively, you can bind the drop-down list to its own data source by setting the column DataSource property. 如果值为集合中的对象或数据库表中的记录,还必须设置DisplayMemberValueMember属性。If the values are objects in a collection or records in a database table, you must also set the DisplayMember and ValueMember properties. DisplayMember属性指示哪个对象属性或数据库列提供显示在下拉列表中的值。The DisplayMember property indicates which object property or database column provides the values that are displayed in the drop-down list. ValueMember属性指示哪个对象属性或数据库列用于设置单元格Value属性。The ValueMember property indicates which object property or database column is used to set the cell Value property.

一个典型方案是将绑定DataGridView控制对父数据库表并将下拉列表绑定到相关的子表。One typical scenario is to bind the DataGridView control to a parent database table and bind the drop-down list to a related child table. 例如,可能会将绑定DataGridView控制对Orders表,该表包含ProductID列和列组DataSource属性设置为Products表,该表包含ProductIDProductName列。For example, you might bind the DataGridView control to an Orders table that contains a ProductID column and set the column DataSource property to a Products table that contains ProductID and ProductName columns. 在这种情况下,您会将列设置DataPropertyName属性设置为"ProductID"填充从其单元格值Orders.ProductID列。In this case, you would set the column DataPropertyName property to "ProductID" to populate its cell values from the Orders.ProductID column. 但是,若要在单元格和下拉列表中显示实际的产品名称,将映射到这些值Products通过设置表ValueMember属性设置为"ProductID"和DisplayMember属性设置为"ProductName"。However, to display the actual product names in the cells and the drop-down list, you would map these values to the Products table by setting the ValueMember property to "ProductID" and the DisplayMember property to "ProductName".

下拉列表值 (或所指示的值ValueMember属性) 必须包含实际的单元格的值或DataGridView控件将引发异常。The drop-down list values (or the values indicated by the ValueMember property) must include the actual cell values or the DataGridView control will throw an exception.

设置该列DataSourceDisplayMember,并ValueMember属性将自动设置相应属性的所有单元格的列包括在CellTemplateSetting the column DataSource, DisplayMember, and ValueMember properties automatically sets the corresponding properties of all cells in the column including the CellTemplate. 若要替代特定单元格这些属性值,首先,设置列属性,然后设置单元属性。To override these property values for specific cells, set the column property first, and then set the cell properties.

与不同ComboBox控件,DataGridViewComboBoxCell不具有SelectedIndexSelectedValue属性。Unlike the ComboBox control, the DataGridViewComboBoxCell does not have SelectedIndex and SelectedValue properties. 相反,从下拉列表中选择一个值设置的单元格Value属性。Instead, selecting a value from a drop-down list sets the cell Value property.

此列类型的默认排序模式是NotSortableThe default sort mode for this column type is NotSortable.

继承者说明

派生自DataGridViewComboBoxColumn并将新属性添加到派生类,请确保重写Clone()方法以在克隆操作过程中复制新属性。When you derive from DataGridViewComboBoxColumn and add new properties to the derived class, be sure to override the Clone() method to copy the new properties during cloning operations. 此外应调用基类的Clone()方法,以便基类的属性复制到新的单元格。You should also call the base class's Clone() method so that the properties of the base class are copied to the new cell.

构造函数

DataGridViewComboBoxColumn() DataGridViewComboBoxColumn() DataGridViewComboBoxColumn() DataGridViewComboBoxColumn()

DataGridViewTextBoxColumn 类的新实例初始化为默认状态。Initializes a new instance of the DataGridViewTextBoxColumn class to the default state.

属性

AutoComplete AutoComplete AutoComplete AutoComplete

获取或设置一个值,该值指示列中的单元格是否与在带有可能选项之一的单元格中输入的字符匹配。Gets or sets a value indicating whether cells in the column will match the characters being entered in the cell with one from the possible selections.

AutoSizeMode AutoSizeMode AutoSizeMode AutoSizeMode

获取或设置模式,通过此模式列可以自动调整其宽度。Gets or sets the mode by which the column automatically adjusts its width.

(Inherited from DataGridViewColumn)
CellTemplate CellTemplate CellTemplate CellTemplate

获取或设置用于创建单元格的模板。Gets or sets the template used to create cells.

CellType CellType CellType CellType

获取单元格模板的运行时类型。Gets the run-time type of the cell template.

(Inherited from DataGridViewColumn)
ContextMenuStrip ContextMenuStrip ContextMenuStrip ContextMenuStrip

获取或设置列的快捷菜单。Gets or sets the shortcut menu for the column.

(Inherited from DataGridViewColumn)
DataGridView DataGridView DataGridView DataGridView

获取与此元素关联的 DataGridView 控件。Gets the DataGridView control associated with this element.

(Inherited from DataGridViewElement)
DataPropertyName DataPropertyName DataPropertyName DataPropertyName

获取或设置数据源属性或数据库列的名称到DataGridViewColumn绑定。Gets or sets the name of the data source property or database column to which the DataGridViewColumn is bound.

(Inherited from DataGridViewColumn)
DataSource DataSource DataSource DataSource

获取或设置填充组合框的选项的数据源。Gets or sets the data source that populates the selections for the combo boxes.

DefaultCellStyle DefaultCellStyle DefaultCellStyle DefaultCellStyle

获取或设置列的默认单元格样式。Gets or sets the column's default cell style.

(Inherited from DataGridViewColumn)
DefaultHeaderCellType DefaultHeaderCellType DefaultHeaderCellType DefaultHeaderCellType

获取或设置默认标题单元格的运行时类型。Gets or sets the run-time type of the default header cell.

(Inherited from DataGridViewBand)
Displayed Displayed Displayed Displayed

获取一个值,该值指示带区当前是否显示在屏幕上。Gets a value indicating whether the band is currently displayed onscreen.

(Inherited from DataGridViewBand)
DisplayIndex DisplayIndex DisplayIndex DisplayIndex

相对于当前所显示各列,获取或设置列的显示顺序。Gets or sets the display order of the column relative to the currently displayed columns.

(Inherited from DataGridViewColumn)
DisplayMember DisplayMember DisplayMember DisplayMember

获取或设置一个字符串,此字符串指定要从其中检索在组合框中显示的字符串的属性或列。Gets or sets a string that specifies the property or column from which to retrieve strings for display in the combo boxes.

DisplayStyle DisplayStyle DisplayStyle DisplayStyle

获取或设置一个值,该值确定没有编辑时组合框的显示方式。Gets or sets a value that determines how the combo box is displayed when not editing.

DisplayStyleForCurrentCellOnly DisplayStyleForCurrentCellOnly DisplayStyleForCurrentCellOnly DisplayStyleForCurrentCellOnly

获取或设置一个值,该值指示当前单元格位于此列时,DisplayStyle 属性值是否只应用于 DataGridView 控件中的当前单元格。Gets or sets a value indicating whether the DisplayStyle property value applies only to the current cell in the DataGridView control when the current cell is in this column.

DividerWidth DividerWidth DividerWidth DividerWidth

获取或设置列分隔符的宽度(以像素为单位)。Gets or sets the width, in pixels, of the column divider.

(Inherited from DataGridViewColumn)
DropDownWidth DropDownWidth DropDownWidth DropDownWidth

获取或设置组合框的下拉列表的宽度。Gets or sets the width of the drop-down lists of the combo boxes.

FillWeight FillWeight FillWeight FillWeight

获取或设置一个值,表示当该列处于填充模式时,相对于控件中处于填充模式的其他列的宽度。Gets or sets a value that represents the width of the column when it is in fill mode relative to the widths of other fill-mode columns in the control.

(Inherited from DataGridViewColumn)
FlatStyle FlatStyle FlatStyle FlatStyle

获取或设置列的单元格的平面样式外观。Gets or sets the flat style appearance of the column's cells.

Frozen Frozen Frozen Frozen

获取或设置一个值,该值指示列是否移动用户滚动DataGridView控制水平。Gets or sets a value indicating whether a column will move when a user scrolls the DataGridView control horizontally.

(Inherited from DataGridViewColumn)
HasDefaultCellStyle HasDefaultCellStyle HasDefaultCellStyle HasDefaultCellStyle

获取指示是否已设置 DefaultCellStyle 属性的值。Gets a value indicating whether the DefaultCellStyle property has been set.

(Inherited from DataGridViewBand)
HeaderCell HeaderCell HeaderCell HeaderCell

获取或设置DataGridViewColumnHeaderCell表示列标题。Gets or sets the DataGridViewColumnHeaderCell that represents the column header.

(Inherited from DataGridViewColumn)
HeaderCellCore HeaderCellCore HeaderCellCore HeaderCellCore

获取或设置 DataGridViewBand 的标题单元格。Gets or sets the header cell of the DataGridViewBand.

(Inherited from DataGridViewBand)
HeaderText HeaderText HeaderText HeaderText

获取或设置列标题单元格的标题文本。Gets or sets the caption text on the column's header cell.

(Inherited from DataGridViewColumn)
Index Index Index Index

获取带区在 DataGridView 控件中的相对位置。Gets the relative position of the band within the DataGridView control.

(Inherited from DataGridViewBand)
InheritedAutoSizeMode InheritedAutoSizeMode InheritedAutoSizeMode InheritedAutoSizeMode

获取对该列有效的缩放模式。Gets the sizing mode in effect for the column.

(Inherited from DataGridViewColumn)
InheritedStyle InheritedStyle InheritedStyle InheritedStyle

获取当前应用于该列的单元格样式。Gets the cell style currently applied to the column.

(Inherited from DataGridViewColumn)
IsDataBound IsDataBound IsDataBound IsDataBound

获取一个值,指示该列是否绑定到某个数据源。Gets a value indicating whether the column is bound to a data source.

(Inherited from DataGridViewColumn)
IsRow IsRow IsRow IsRow

获取一个值,该值指示带区是否表示一个行。Gets a value indicating whether the band represents a row.

(Inherited from DataGridViewBand)
Items Items Items Items

获取用作组合框中选项的对象的集合。Gets the collection of objects used as selections in the combo boxes.

MaxDropDownItems MaxDropDownItems MaxDropDownItems MaxDropDownItems

获取或设置列的单元格中下拉列表的最大项数。Gets or sets the maximum number of items in the drop-down list of the cells in the column.

MinimumWidth MinimumWidth MinimumWidth MinimumWidth

获取或设置列的最小宽度(以像素为单位)。Gets or sets the minimum width, in pixels, of the column.

(Inherited from DataGridViewColumn)
Name Name Name Name

获取或设置列名称。Gets or sets the name of the column.

(Inherited from DataGridViewColumn)
ReadOnly ReadOnly ReadOnly ReadOnly

获取或设置一个值,指示用户是否可以编辑列的单元格。Gets or sets a value indicating whether the user can edit the column's cells.

(Inherited from DataGridViewColumn)
Resizable Resizable Resizable Resizable

获取或设置一个值,指示该列的大小是否可调。Gets or sets a value indicating whether the column is resizable.

(Inherited from DataGridViewColumn)
Selected Selected Selected Selected

获取或设置一个值,该值指示带区是否为被选定。Gets or sets a value indicating whether the band is in a selected user interface (UI) state.

(Inherited from DataGridViewBand)
Site Site Site Site

获取或设置列的站点。Gets or sets the site of the column.

(Inherited from DataGridViewColumn)
Sorted Sorted Sorted Sorted

获取或设置指示是否对组合框中的项进行了排序的值。Gets or sets a value indicating whether the items in the combo box are sorted.

SortMode SortMode SortMode SortMode

获取或设置列的排序模式。Gets or sets the sort mode for the column.

(Inherited from DataGridViewColumn)
State State State State

获取元素的用户界面 (UI) 状态。Gets the user interface (UI) state of the element.

(Inherited from DataGridViewElement)
Tag Tag Tag Tag

获取或设置包含与带区关联的数据的对象。Gets or sets the object that contains data to associate with the band.

(Inherited from DataGridViewBand)
ToolTipText ToolTipText ToolTipText ToolTipText

获取或设置用于工具提示的文本。Gets or sets the text used for ToolTips.

(Inherited from DataGridViewColumn)
ValueMember ValueMember ValueMember ValueMember

获取或设置一个字符串,此字符串指定要从其中获取与下拉列表的选项对应的值的属性或列。Gets or sets a string that specifies the property or column from which to get values that correspond to the selections in the drop-down list.

ValueType ValueType ValueType ValueType

获取或设置列单元格中值的数据类型。Gets or sets the data type of the values in the column's cells.

(Inherited from DataGridViewColumn)
Visible Visible Visible Visible

获取或设置一个值,指示该列是否可见。Gets or sets a value indicating whether the column is visible.

(Inherited from DataGridViewColumn)
Width Width Width Width

获取或设置列的当前宽度。Gets or sets the current width of the column.

(Inherited from DataGridViewColumn)

方法

Clone() Clone() Clone() Clone()

创建此列的一个精确副本。Creates an exact copy of this column.

Dispose() Dispose() Dispose() Dispose()

释放由 DataGridViewBand 使用的所有资源。Releases all resources used by the DataGridViewBand.

(Inherited from DataGridViewBand)
Dispose(Boolean) Dispose(Boolean) Dispose(Boolean) Dispose(Boolean)

释放由 DataGridViewBand 占用的非托管资源,还可以另外再释放托管资源。Releases the unmanaged resources used by the DataGridViewBand and optionally releases the managed resources.

(Inherited from DataGridViewColumn)
Equals(Object) Equals(Object) Equals(Object) Equals(Object)

确定指定的对象是否等于当前对象。Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

作为默认哈希函数。Serves as the default hash function.

(Inherited from Object)
GetPreferredWidth(DataGridViewAutoSizeColumnMode, Boolean) GetPreferredWidth(DataGridViewAutoSizeColumnMode, Boolean) GetPreferredWidth(DataGridViewAutoSizeColumnMode, Boolean) GetPreferredWidth(DataGridViewAutoSizeColumnMode, Boolean)

根据指定条件计算列的理想宽度。Calculates the ideal width of the column based on the specified criteria.

(Inherited from DataGridViewColumn)
GetType() GetType() GetType() GetType()

获取当前实例的 TypeGets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(Inherited from Object)
OnDataGridViewChanged() OnDataGridViewChanged() OnDataGridViewChanged() OnDataGridViewChanged()

当带区与其他 DataGridView 关联时调用。Called when the band is associated with a different DataGridView.

(Inherited from DataGridViewBand)
RaiseCellClick(DataGridViewCellEventArgs) RaiseCellClick(DataGridViewCellEventArgs) RaiseCellClick(DataGridViewCellEventArgs) RaiseCellClick(DataGridViewCellEventArgs)

引发 CellClick 事件。Raises the CellClick event.

(Inherited from DataGridViewElement)
RaiseCellContentClick(DataGridViewCellEventArgs) RaiseCellContentClick(DataGridViewCellEventArgs) RaiseCellContentClick(DataGridViewCellEventArgs) RaiseCellContentClick(DataGridViewCellEventArgs)

引发 CellContentClick 事件。Raises the CellContentClick event.

(Inherited from DataGridViewElement)
RaiseCellContentDoubleClick(DataGridViewCellEventArgs) RaiseCellContentDoubleClick(DataGridViewCellEventArgs) RaiseCellContentDoubleClick(DataGridViewCellEventArgs) RaiseCellContentDoubleClick(DataGridViewCellEventArgs)

引发 CellContentDoubleClick 事件。Raises the CellContentDoubleClick event.

(Inherited from DataGridViewElement)
RaiseCellValueChanged(DataGridViewCellEventArgs) RaiseCellValueChanged(DataGridViewCellEventArgs) RaiseCellValueChanged(DataGridViewCellEventArgs) RaiseCellValueChanged(DataGridViewCellEventArgs)

引发 CellValueChanged 事件。Raises the CellValueChanged event.

(Inherited from DataGridViewElement)
RaiseDataError(DataGridViewDataErrorEventArgs) RaiseDataError(DataGridViewDataErrorEventArgs) RaiseDataError(DataGridViewDataErrorEventArgs) RaiseDataError(DataGridViewDataErrorEventArgs)

引发 DataError 事件。Raises the DataError event.

(Inherited from DataGridViewElement)
RaiseMouseWheel(MouseEventArgs) RaiseMouseWheel(MouseEventArgs) RaiseMouseWheel(MouseEventArgs) RaiseMouseWheel(MouseEventArgs)

引发 MouseWheel 事件。Raises the MouseWheel event.

(Inherited from DataGridViewElement)
ToString() ToString() ToString() ToString()

获取一个描述该列的字符串。Gets a string that describes the column.

事件

Disposed Disposed Disposed Disposed

发生时DataGridViewColumn被释放。Occurs when the DataGridViewColumn is disposed.

(Inherited from DataGridViewColumn)

适用于

另请参阅