DataGridView.Rows Właściwość

Definicja

Pobiera kolekcję zawierającą wszystkie wiersze w DataGridView kontrolce.Gets a collection that contains all the rows in the DataGridView control.

public:
 property System::Windows::Forms::DataGridViewRowCollection ^ Rows { System::Windows::Forms::DataGridViewRowCollection ^ get(); };
[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.DataGridViewRowCollection Rows { get; }
[<System.ComponentModel.Browsable(false)>]
member this.Rows : System.Windows.Forms.DataGridViewRowCollection
Public ReadOnly Property Rows As DataGridViewRowCollection

Wartość właściwości

DataGridViewRowCollection

A DataGridViewRowCollection , który zawiera wszystkie wiersze w DataGridView .A DataGridViewRowCollection that contains all the rows in the DataGridView.

Atrybuty

Przykłady

Poniższy przykład kodu demonstruje, jak utworzyć niepowiązane DataGridView ; ustawić ColumnHeadersVisible ColumnHeadersDefaultCellStyle właściwości,, i i ColumnCount użyć Rows Columns właściwości i.The following code example demonstrates how to create an unbound DataGridView; set the ColumnHeadersVisible, ColumnHeadersDefaultCellStyle, and ColumnCount properties; and use the Rows and Columns properties. Pokazano w nim także, jak używać wersji AutoResizeColumnHeadersHeight AutoResizeRows metod i do prawidłowego rozmiaru nagłówków kolumn i wierszy.It also demonstrates how to use a version of the AutoResizeColumnHeadersHeight and AutoResizeRows methods to properly size the column headers and the rows. Aby uruchomić ten przykład, wklej następujący kod do formularza, który zawiera DataGridView nazwany dataGridView1 i przycisk o nazwie Button1 , a następnie Wywołaj InitializeDataGridView metodę z konstruktora lub Load procedury obsługi zdarzeń.To run this example, paste the following code into a form that contains a DataGridView named dataGridView1 and a button named Button1, and then call the InitializeDataGridView method from the form's constructor or Load event handler. Upewnij się, że wszystkie zdarzenia są połączone z obsługą zdarzeń.Ensure all events are connected with their event handlers.

   void InitializeDataGridView()
   {
      this->Size = System::Drawing::Size( 600, 600 );
      dataGridView1->Size = System::Drawing::Size( 450, 400 );

      // Create an unbound DataGridView by declaring a column count.
      dataGridView1->ColumnCount = 4;
      dataGridView1->ColumnHeadersVisible = true;

      // Set the column header style.
      DataGridViewCellStyle ^ columnHeaderStyle = gcnew DataGridViewCellStyle;
      columnHeaderStyle->BackColor = Color::Aqua;
      columnHeaderStyle->Font = gcnew System::Drawing::Font( "Verdana",10,FontStyle::Bold );
      dataGridView1->ColumnHeadersDefaultCellStyle = columnHeaderStyle;

      // Set the column header names.
      dataGridView1->Columns[ 0 ]->Name = "Recipe";
      dataGridView1->Columns[ 1 ]->Name = "Category";
      dataGridView1->Columns[ 2 ]->Name = "Main Ingredients";
      dataGridView1->Columns[ 3 ]->Name = "Rating";

      // Populate the rows.
      array<String^>^row1 = gcnew array<String^>{
         "Meatloaf","Main Dish","ground beef","**"
      };
      array<String^>^row2 = gcnew array<String^>{
         "Key Lime Pie","Dessert","lime juice, evaporated milk","****"
      };
      array<String^>^row3 = gcnew array<String^>{
         "Orange-Salsa Pork Chops","Main Dish","pork chops, salsa, orange juice","****"
      };
      array<String^>^row4 = gcnew array<String^>{
         "Black Bean and Rice Salad","Salad","black beans, brown rice","****"
      };
      array<String^>^row5 = gcnew array<String^>{
         "Chocolate Cheesecake","Dessert","cream cheese","***"
      };
      array<String^>^row6 = gcnew array<String^>{
         "Black Bean Dip","Appetizer","black beans, sour cream","***"
      };
      array<Object^>^rows = {row1,row2,row3,row4,row5,row6};
      System::Collections::IEnumerator^ myEnum = rows->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         array<String^>^rowArray = safe_cast<array<String^>^>(myEnum->Current);
         dataGridView1->Rows->Add( rowArray );
      }
   }

   void Button1_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      // Resize the height of the column headers. 
      dataGridView1->AutoResizeColumnHeadersHeight();

      // Resize all the row heights to fit the contents of all non-header cells.
      dataGridView1->AutoResizeRows(
            DataGridViewAutoSizeRowsMode::AllCellsExceptHeaders);
   }

   void InitializeContextMenu()
   {
      // Create the menu item.
      MenuItem^ getRecipe = gcnew MenuItem( "Search for recipe",gcnew System::EventHandler( this, &Form1::OnMenuClick ) );

      // Add the menu item to the shortcut menu.
      System::Windows::Forms::ContextMenuStrip^ recipeMenu = gcnew System::Windows::Forms::ContextMenuStrip();

      // Set the shortcut menu for the first column.
      dataGridView1->Columns[ 0 ]->ContextMenuStrip = recipeMenu;
   }

   void OnMenuClick( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      if ( dataGridView1->CurrentCell != nullptr )
      {
         //Retrieve the recipe name.
         String^ recipeName = dynamic_cast<String^>(dataGridView1->CurrentCell->Value);

         //Search for the recipe.
         System::Diagnostics::Process::Start( String::Format( "http://search.msn.com/results.aspx?q={0}", recipeName ), nullptr );
      }
   }

private:

private void InitializeDataGridView()
{
    // Create an unbound DataGridView by declaring a column count.
    dataGridView1.ColumnCount = 4;
    dataGridView1.ColumnHeadersVisible = true;

    // Set the column header style.
    DataGridViewCellStyle columnHeaderStyle = new DataGridViewCellStyle();

    columnHeaderStyle.BackColor = Color.Beige;
    columnHeaderStyle.Font = new Font("Verdana", 10, FontStyle.Bold);
    dataGridView1.ColumnHeadersDefaultCellStyle = columnHeaderStyle;

    // Set the column header names.
    dataGridView1.Columns[0].Name = "Recipe";
    dataGridView1.Columns[1].Name = "Category";
    dataGridView1.Columns[2].Name = "Main Ingredients";
    dataGridView1.Columns[3].Name = "Rating";

    // Populate the rows.
    string[] row1 = new string[] { "Meatloaf", "Main Dish", "ground beef",
        "**" };
    string[] row2 = new string[] { "Key Lime Pie", "Dessert", 
        "lime juice, evaporated milk", "****" };
    string[] row3 = new string[] { "Orange-Salsa Pork Chops", "Main Dish", 
        "pork chops, salsa, orange juice", "****" };
    string[] row4 = new string[] { "Black Bean and Rice Salad", "Salad", 
        "black beans, brown rice", "****" };
    string[] row5 = new string[] { "Chocolate Cheesecake", "Dessert", 
        "cream cheese", "***" };
    string[] row6 = new string[] { "Black Bean Dip", "Appetizer", 
        "black beans, sour cream", "***" };
    object[] rows = new object[] { row1, row2, row3, row4, row5, row6 };

    foreach (string[] rowArray in rows)
    {
        dataGridView1.Rows.Add(rowArray);
    }
}

private void button1_Click(object sender, System.EventArgs e)
{
    // Resize the height of the column headers. 
    dataGridView1.AutoResizeColumnHeadersHeight();

    // Resize all the row heights to fit the contents of all non-header cells.
    dataGridView1.AutoResizeRows(
        DataGridViewAutoSizeRowsMode.AllCellsExceptHeaders);
}

private void InitializeContextMenu()
{
    // Create the menu item.
    ToolStripMenuItem getRecipe = new ToolStripMenuItem("Search for recipe", null,
        new System.EventHandler(ShortcutMenuClick));

    // Add the menu item to the shortcut menu.
    ContextMenuStrip recipeMenu = new ContextMenuStrip();
    recipeMenu.Items.Add(getRecipe); 

    // Set the shortcut menu for the first column.
    dataGridView1.Columns[0].ContextMenuStrip = recipeMenu;
    dataGridView1.MouseDown += new MouseEventHandler(dataGridView1_MouseDown);
}

private DataGridViewCell clickedCell;

private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
{
// If the user right-clicks a cell, store it for use by the shortcut menu.
    if (e.Button == MouseButtons.Right)
    {
        DataGridView.HitTestInfo hit = dataGridView1.HitTest(e.X, e.Y);
        if (hit.Type == DataGridViewHitTestType.Cell)
        {
            clickedCell =
                dataGridView1.Rows[hit.RowIndex].Cells[hit.ColumnIndex];
        }
    }
}

private void ShortcutMenuClick(object sender, System.EventArgs e)
{
    if (clickedCell != null)
    {
        //Retrieve the recipe name.
        string recipeName = (string)clickedCell.Value;

        //Search for the recipe.
        System.Diagnostics.Process.Start(
            "http://search.msn.com/results.aspx?q=" + recipeName);
            //null);
    }
}
Private Sub InitializeDataGridView()

    ' Create an unbound DataGridView by declaring a column count.
    dataGridView1.ColumnCount = 4
    dataGridView1.ColumnHeadersVisible = True

    ' Set the column header style.
    Dim columnHeaderStyle As New DataGridViewCellStyle()

    columnHeaderStyle.BackColor = Color.Beige
    columnHeaderStyle.Font = New Font("Verdana", 10, FontStyle.Bold)
    dataGridView1.ColumnHeadersDefaultCellStyle = columnHeaderStyle

    ' Set the column header names.
    dataGridView1.Columns(0).Name = "Recipe"
    dataGridView1.Columns(1).Name = "Category"
    dataGridView1.Columns(2).Name = "Main Ingredients"
    dataGridView1.Columns(3).Name = "Rating"

    ' Populate the rows.
    Dim row1() As String = {"Meatloaf", "Main Dish", "ground beef", "**"}
    Dim row2() As String = _
        {"Key Lime Pie", "Dessert", "lime juice, evaporated milk", "****"}
    Dim row3() As String = {"Orange-Salsa Pork Chops", "Main Dish", _
        "pork chops, salsa, orange juice", "****"}
    Dim row4() As String = {"Black Bean and Rice Salad", "Salad", _
        "black beans, brown rice", "****"}
    Dim row5() As String = _
        {"Chocolate Cheesecake", "Dessert", "cream cheese", "***"}
    Dim row6() As String = _
        {"Black Bean Dip", "Appetizer", "black beans, sour cream", "***"}
    Dim rows() As Object = {row1, row2, row3, row4, row5, row6}

    Dim rowArray As String()
    For Each rowArray In rows
        dataGridView1.Rows.Add(rowArray)
    Next rowArray

End Sub

Private Sub button1_Click(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles button1.Click

    ' Resize the height of the column headers. 
    dataGridView1.AutoResizeColumnHeadersHeight()

    ' Resize all the row heights to fit the contents of all 
    ' non-header cells.
    dataGridView1.AutoResizeRows( _
        DataGridViewAutoSizeRowsMode.AllCellsExceptHeaders)

End Sub

Private Sub InitializeContextMenu()

    ' Create the menu item.
    Dim getRecipe As New ToolStripMenuItem( _
        "Search for recipe", Nothing, AddressOf ShortcutMenuClick)

    ' Add the menu item to the shortcut menu.
    Dim recipeMenu As New ContextMenuStrip()
    recipeMenu.Items.Add(getRecipe)

    ' Set the shortcut menu for the first column.
    dataGridView1.Columns(0).ContextMenuStrip = recipeMenu

End Sub

Private clickedCell As DataGridViewCell

Private Sub dataGridView1_MouseDown(ByVal sender As Object, _
    ByVal e As MouseEventArgs) Handles dataGridView1.MouseDown

    ' If the user right-clicks a cell, store it for use by the 
    ' shortcut menu.
    If e.Button = MouseButtons.Right Then
        Dim hit As DataGridView.HitTestInfo = _
            dataGridView1.HitTest(e.X, e.Y)
        If hit.Type = DataGridViewHitTestType.Cell Then
            clickedCell = _
                dataGridView1.Rows(hit.RowIndex).Cells(hit.ColumnIndex)
        End If
    End If

End Sub

Private Sub ShortcutMenuClick(ByVal sender As Object, _
    ByVal e As System.EventArgs)

    If (clickedCell IsNot Nothing) Then
        'Retrieve the recipe name.
        Dim recipeName As String = CStr(clickedCell.Value)

        'Search for the recipe.
        System.Diagnostics.Process.Start( _
            "http://search.msn.com/results.aspx?q=" + recipeName)
    End If

End Sub

Uwagi

Możesz użyć kolekcji, Rows Aby ręcznie wypełnić DataGridView kontrolkę zamiast powiązać ją ze źródłem danych.You can use the Rows collection to manually populate a DataGridView control instead of binding it to a data source. W poniższym przykładzie pokazano, jak ręcznie dodawać i wstawiać wiersze.The following example shows you how to manually add and insert rows. W tym przykładzie przyjęto założenie, że dodano cztery DataGridViewTextBoxColumn wystąpienia do Columns kolekcji kontrolki.This example assumes that you have added four DataGridViewTextBoxColumn instances to the control's Columns collection.

Me.dataGridView1.Rows.Add("five", "six", "seven", "eight")  
Me.dataGridView1.Rows.Insert(0, "one", "two", "three", "four")  
this.dataGridView1.Rows.Add("five", "six", "seven", "eight");this.dataGridView1.Rows.Insert(0, "one", "two", "three", "four");  

Aby zapoznać się ze szczegółowym przykładem, który programowo wypełnia formant niezwiązany DataGridView , zobacz sekcję przykład.For a detailed example that programmatically populates an unbound DataGridView control, see the Example section.

Wiersze zawierają informacje o stylu oprócz wartości komórek.Rows include style information in addition to cell values. Z tego powodu możesz chcieć dodać lub wstawić wiersze na podstawie istniejących wierszy, które zostały już wzorowane.For this reason, you might want to add or insert rows based on existing rows that you have already styled. Można to zrobić przy użyciu AddCopy metod, AddCopies , InsertCopy i InsertCopies .You can do this using the AddCopy, AddCopies, InsertCopy, and InsertCopies methods.

Można również użyć kolekcji, Rows Aby zmodyfikować wartości w kontrolce lub usunąć wiersze.You can also use the Rows collection to modify the values in the control or to remove rows. Możesz zmodyfikować wartości lub usunąć wiersze bez względu na to, czy formant jest powiązany z zewnętrznym źródłem danych.You can modify values or remove rows regardless of whether the control is bound to an external data source. W przypadku źródła danych zmiany są wprowadzane bezpośrednio do źródła danych.If there is a data source, the changes are made directly to the data source. Nadal może być konieczne wypchnięcie aktualizacji źródła danych do zdalnej bazy danych.You may still need to push the data source updates to a remote database, however. Aby uzyskać więcej informacji, zobacz How to: bind Data w formancie DataGridView Windows Forms.For more information, see How to: Bind Data to the Windows Forms DataGridView Control.

Poniższy przykład pokazuje, jak modyfikować wartości komórek programowo.The following example shows you how to modify cell values programmatically.

' Modify the value in the first cell of the second row.  
Me.dataGridView1.Rows[1].Cells[0].Value = "new value"  

' The previous line is equivalent to the following line.  
Me.dataGridView1[0, 1].Value = "new value"  
// Modify the value in the first cell of the second row.  
this.dataGridView1.Rows[1].Cells[0].Value = "new value";  

// The previous line is equivalent to the following line.  
this.dataGridView1[0, 1].Value = "new value";  

Oprócz standardowych możliwości kolekcji, można użyć Rows kolekcji do pobrania informacji o wierszach.In addition to the standard collection capabilities, you can use the Rows collection to retrieve information about rows. Użyj GetRowState metody, aby określić stan konkretnego wiersza.Use the GetRowState method to determine the state of a particular row. Użyj GetRowCount metod i, GetRowsHeight Aby określić liczbę wierszy lub łączną wysokość wierszy w określonym stanie.Use the GetRowCount and GetRowsHeight methods to determine the number of rows or the combined height of rows in a particular state. Aby pobrać indeks wiersza z określonym stanem, użyj GetFirstRow metod,, GetLastRow GetNextRow i GetPreviousRow .To retrieve the index of a row with a particular state, use the GetFirstRow, GetLastRow, GetNextRow, and GetPreviousRow methods.

Poniższy przykład pokazuje, jak pobrać indeks pierwszego zaznaczonego wiersza, a następnie użyć go do programowego usunięcia wiersza.The following example shows you how to retrieve the index of the first selected row, and then use it to programmatically delete the row.

Dim rowToDelete As Int32 = Me.dataGridView1.Rows.GetFirstRow( _  
    DataGridViewElementStates.Selected)  
If rowToDelete > -1 Then  
    Me.dataGridView1.Rows.RemoveAt(rowToDelete)  
End If  
Int32 rowToDelete = this.dataGridView1.Rows.GetFirstRow(  
    DataGridViewElementStates.Selected);  
if (rowToDelete > -1)  
{  
    this.dataGridView1.Rows.RemoveAt(rowToDelete);  
}  

Aby zwiększyć wydajność, DataGridViewRowCollection zwracany przez Rows Właściwość może zawierać wiersze udostępnione i nieudostępnione.To improve performance, the DataGridViewRowCollection returned by the Rows property can include shared and unshared rows. Udostępnione wiersze udostępniają pamięć, aby zmniejszyć koszt dużego zestawu rekordów.Shared rows share memory to reduce the cost of a large record set. Jeśli zestaw rekordów jest bardzo duży, należy zachować ostrożność podczas uzyskiwania dostępu do Rows właściwości.If your record set is very large, you should be careful to keep the rows shared as much as possible when accessing the Rows property.

Aby uzyskać więcej informacji, zobacz najlepsze rozwiązania dotyczące skalowania Windows Forms formantu DataGridView.For more information, see Best Practices for Scaling the Windows Forms DataGridView Control.

Dotyczy