DataGridView.DataSource DataGridView.DataSource DataGridView.DataSource DataGridView.DataSource Property

Definición

Obtiene o establece el origen de datos cuyos datos se están mostrando en el control DataGridView.Gets or sets the data source that the DataGridView is displaying data for.

public:
 property System::Object ^ DataSource { System::Object ^ get(); void set(System::Object ^ value); };
public object DataSource { get; set; }
member this.DataSource : obj with get, set
Public Property DataSource As Object

Valor de propiedad

Objeto que contiene los datos que se van a mostrar con el control DataGridView.The object that contains data for the DataGridView to display.

Excepciones

Se produjo un error en el origen de datos y no hay ningún controlador para el evento DataError o el controlador ha establecido la propiedad ThrowException en true.An error occurred in the data source and either there is no handler for the DataError event or the handler has set the ThrowException property to true. El objeto de excepción normalmente se puede convertir al tipo FormatException.The exception object can typically be cast to type FormatException.

Ejemplos

En el ejemplo de código siguiente se muestra cómo inicializar un enlace DataGridViewde datos simple.The following code example demonstrates how to initialize a simple data-bound DataGridView. También se muestra cómo establecer la DataSource propiedad.It also demonstrates how to set the DataSource property.

#using <System.Transactions.dll>
#using <System.EnterpriseServices.dll>
#using <System.Xml.dll>
#using <System.Drawing.dll>
#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Data.dll>

using namespace System;
using namespace System::Data;
using namespace System::Data::SqlClient;
using namespace System::Windows::Forms;
using namespace System::Drawing;
public ref class Form1: public System::Windows::Forms::Form
{
public:
   Form1()
      : Form()
   {
      
      //This call is required by the Windows Form Designer.
      InitializeComponent();
      InitializeDataGridView();
      
      //Add any initialization after the InitializeComponent() call
   }


protected:

   ~Form1()
   {
      if ( components != nullptr )
      {
         delete components;
      }
   }

private:
   System::Windows::Forms::DataGridView ^ dataGridView1;
   System::Windows::Forms::BindingSource ^ bindingSource1;

   //Required by the Windows Form Designer
   System::ComponentModel::IContainer^ components;

   //NOTE: The following procedure is required by the Windows Form Designer
   //It can be modified using the Windows Form Designer.  
   //Do not modify it using the code editor.

   [System::Diagnostics::DebuggerNonUserCode]
   void InitializeComponent()
   {
      this->dataGridView1 = gcnew System::Windows::Forms::DataGridView;
      this->bindingSource1 = gcnew System::Windows::Forms::BindingSource;
      this->SuspendLayout();

      //
      //DataGridView1
      //
      this->dataGridView1->Location = System::Drawing::Point( 96, 71 );
      this->dataGridView1->Name = "DataGridView1";
      this->dataGridView1->Size = System::Drawing::Size( 321, 286 );
      this->dataGridView1->TabIndex = 0;

      //
      //Form1
      //
      this->ClientSize = System::Drawing::Size( 518, 413 );
      this->Controls->Add( this->dataGridView1 );
      this->Name = "Form1";
      this->Text = "Form1";
      this->ResumeLayout( false );
   }

internal:

   static property Form1^ GetInstance 
   {
      Form1^ get()
      {
         if ( m_DefaultInstance == nullptr || m_DefaultInstance->IsDisposed )
         {
            System::Threading::Monitor::Enter( m_SyncObject );
            try
            {
               if ( m_DefaultInstance == nullptr || m_DefaultInstance->IsDisposed )
               {
                  m_DefaultInstance = gcnew Form1;
               }
            }
            finally
            {
               System::Threading::Monitor::Exit( m_SyncObject );
            }
         }

         return m_DefaultInstance;
      }
   }

private:
   static Form1^ m_DefaultInstance;
   static Object^ m_SyncObject = gcnew Object;

   void InitializeDataGridView()
   {
      try
      {
         // Set up the DataGridView.
         dataGridView1->Dock = DockStyle::Fill;

         // Automatically generate the DataGridView columns.
         dataGridView1->AutoGenerateColumns = true;

         // Set up the data source.
         bindingSource1->DataSource = GetData( "Select * From Products" );
         dataGridView1->DataSource = bindingSource1;

         // Automatically resize the visible rows.
         dataGridView1->AutoSizeRowsMode = DataGridViewAutoSizeRowsMode::DisplayedCellsExceptHeaders;

         // Set the DataGridView control's border.
         dataGridView1->BorderStyle = BorderStyle::Fixed3D;

         // Put the cells in edit mode when user enters them.
         dataGridView1->EditMode = DataGridViewEditMode::EditOnEnter;
      }
      catch ( SqlException^ ) 
      {
         MessageBox::Show( "To run this sample replace connection.ConnectionString"
         " with a valid connection string to a Northwind"
         " database accessible to your system.", "ERROR", MessageBoxButtons::OK, MessageBoxIcon::Exclamation );
         System::Threading::Thread::CurrentThread->Abort();
      }
      catch ( System::Exception^ ex ) 
      {
         MessageBox::Show( ex->ToString() );
      }
   }


   DataTable^ GetData( String^ sqlCommand )
   {
      String^ connectionString = "Integrated Security=SSPI;Persist Security Info=False;"
      "Initial Catalog=Northwind;Data Source= localhost";
      SqlConnection^ northwindConnection = gcnew SqlConnection( connectionString );
      SqlCommand^ command = gcnew SqlCommand( sqlCommand,northwindConnection );
      SqlDataAdapter^ adapter = gcnew SqlDataAdapter;
      adapter->SelectCommand = command;
      DataTable^ table = gcnew DataTable;
      adapter->Fill( table );
      return table;
   }
};

int main()
{
   Application::Run( gcnew Form1 );
}
using System;
using System.Data;
using System.Data.SqlClient;
using System.Windows.Forms;
using System.Drawing;

public class Form1 : System.Windows.Forms.Form
{
    private DataGridView dataGridView1 = new DataGridView();
    private BindingSource bindingSource1 = new BindingSource();

    public Form1()
    {
        dataGridView1.Dock = DockStyle.Fill;
        this.Controls.Add(dataGridView1);
        InitializeDataGridView();
    }

    private void InitializeDataGridView()
    {
        try
        {
            // Set up the DataGridView.
            dataGridView1.Dock = DockStyle.Fill;

            // Automatically generate the DataGridView columns.
            dataGridView1.AutoGenerateColumns = true;

            // Set up the data source.
            bindingSource1.DataSource = GetData("Select * From Products");
            dataGridView1.DataSource = bindingSource1;

            // Automatically resize the visible rows.
            dataGridView1.AutoSizeRowsMode =
                DataGridViewAutoSizeRowsMode.DisplayedCellsExceptHeaders;

            // Set the DataGridView control's border.
            dataGridView1.BorderStyle = BorderStyle.Fixed3D;

            // Put the cells in edit mode when user enters them.
            dataGridView1.EditMode = DataGridViewEditMode.EditOnEnter;
        }
        catch (SqlException)
        {
            MessageBox.Show("To run this sample replace connection.ConnectionString" +
                " with a valid connection string to a Northwind" +
                " database accessible to your system.", "ERROR",
                MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            System.Threading.Thread.CurrentThread.Abort();
        }
    }

    private static DataTable GetData(string sqlCommand)
    {
        string connectionString = "Integrated Security=SSPI;" +
            "Persist Security Info=False;" +
            "Initial Catalog=Northwind;Data Source=localhost";

        SqlConnection northwindConnection = new SqlConnection(connectionString);

        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;
    }

    [STAThreadAttribute()]
    public static void Main()
    {
        Application.Run(new Form1());
    }
}
Imports System.Data
Imports System.Data.SqlClient
Imports System.Windows.Forms
Imports System.Drawing
Public Class Form1
    Inherits System.Windows.Forms.Form

    Private WithEvents dataGridView1 As New DataGridView()
    Private bindingSource1 As New BindingSource()

    Public Sub New()

        Me.dataGridView1.Dock = DockStyle.Fill
        Me.Controls.Add(Me.dataGridView1)
        InitializeDataGridView()

    End Sub

    Private Sub InitializeDataGridView()
        Try
            ' Set up the DataGridView.
            With Me.dataGridView1
                ' Automatically generate the DataGridView columns.
                .AutoGenerateColumns = True

                ' Set up the data source.
                bindingSource1.DataSource = GetData("Select * From Products")
                .DataSource = bindingSource1

                ' Automatically resize the visible rows.
                .AutoSizeRowsMode = _
                    DataGridViewAutoSizeRowsMode.DisplayedCellsExceptHeaders

                ' Set the DataGridView control's border.
                .BorderStyle = BorderStyle.Fixed3D

                ' Put the cells in edit mode when user enters them.
                .EditMode = DataGridViewEditMode.EditOnEnter
            End With
        Catch ex As SqlException
            MessageBox.Show("To run this sample replace " _
                & "connection.ConnectionString with a valid connection string" _
                & "  to a Northwind database accessible to your system.", _
                "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
            System.Threading.Thread.CurrentThread.Abort()
        End Try
    End Sub

    Private Shared Function GetData(ByVal sqlCommand As String) _
        As DataTable

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

        Dim northwindConnection As SqlConnection = _
            New SqlConnection(connectionString)

        Dim command As New SqlCommand(sqlCommand, northwindConnection)
        Dim adapter As SqlDataAdapter = New SqlDataAdapter()
        adapter.SelectCommand = command

        Dim table As New DataTable
        table.Locale = System.Globalization.CultureInfo.InvariantCulture
        adapter.Fill(table)

        Return table

    End Function

    <STAThreadAttribute()> _
    Public Shared Sub Main()
        Application.Run(New Form1)
    End Sub

End Class

Comentarios

La DataGridView clase admite el modelo de enlace de datos de Windows Forms estándar.The DataGridView class supports the standard Windows Forms data-binding model. Esto significa que el origen de datos puede ser de cualquier tipo que implemente una de las interfaces siguientes:This means the data source can be of any type that implements one of the following interfaces:

Para obtener ejemplos específicos, vea la sección de ejemplo y la tabla de tareas al final de esta sección.For specific examples, see the Example section and the task table at the end of this section.

Normalmente, se enlazará a un BindingSource componente y se enlazará el BindingSource componente a otro origen de datos o se rellenará con objetos comerciales.Typically, you will bind to a BindingSource component and bind the BindingSource component to another data source or populate it with business objects. El BindingSource componente es el origen de datos preferido porque puede enlazar con una amplia variedad de orígenes de datos y puede resolver muchos problemas de enlace de datos automáticamente.The BindingSource component is the preferred data source because it can bind to a wide variety of data sources and can resolve many data binding issues automatically.

Al enlazar a un origen de datos que contiene varias listas o tablas, debe establecer DataMember la propiedad en una cadena que especifique la lista o la tabla a la que se va a enlazar.When binding to a data source that contains multiple lists or tables, you must set the DataMember property to a string that specifies the list or table to bind to. Sin embargo, al BindingSource enlazar a un componente que contiene varias listas o tablas, puede establecer DataMember la propiedad del BindingSource componente en su lugar.When binding to a BindingSource component that contains multiple lists or tables, however, you can set the DataMember property of the BindingSource component instead.

Al enlazar a una colección de objetos en lugar de a los datos de la base DataSourceNullValue de datos, normalmente se establece la DefaultCellStyle propiedad del objeto devuelto por la propiedad en DBNull.Value null , en lugar de usar el valor predeterminado de, que es adecuado para los datos de la base de datos.When binding to an object collection rather than to database data, you will typically set the DataSourceNullValue property of the object returned by the DefaultCellStyle property to null rather than using the default value of DBNull.Value, which is appropriate for database data.

Para obtener más información, vea Mostrar datos en el control DataGridView de Windows Forms.For more information, see Displaying Data in the Windows Forms DataGridView Control. En la tabla siguiente se proporcionan vínculos directos a las tareas comunes DataSource relacionadas con la propiedad.The following table provides direct links to common tasks related to the DataSource property.

Vea Tutorial: Crear un formulario principal-detalle mediante dos controles Windows Forms DataGridView y cómo: Enlazar objetos a controlesDataGridView Windows Forms.See Walkthrough: Creating a Master/Detail Form Using Two Windows Forms DataGridView Controls and How to: Bind Objects to Windows Forms DataGridView Controls.

Se aplica a

Consulte también: