BindingManagerBase.BindingComplete BindingManagerBase.BindingComplete BindingManagerBase.BindingComplete BindingManagerBase.BindingComplete Event

Definición

Se produce cuando finaliza una operación de enlace de datos.Occurs at the completion of a data-binding operation.

public:
 event System::Windows::Forms::BindingCompleteEventHandler ^ BindingComplete;
public event System.Windows.Forms.BindingCompleteEventHandler BindingComplete;
member this.BindingComplete : System.Windows.Forms.BindingCompleteEventHandler 
Public Custom Event BindingComplete As BindingCompleteEventHandler 

Ejemplos

En el ejemplo de código siguiente se muestra cómo controlar el BindingComplete eventos y asegúrese de que varios controles enlazados al mismo origen de datos permanezcan sincronizados cuando cambia uno de los valores del control.The following code example demonstrates how to handle the BindingComplete event and ensure multiple controls bound to the same data source remain synchronized when one of the control values is changed. Para ejecutar este ejemplo, pegue el código en un formulario de Windows y llamar a la InitializeControlsAndData método desde el constructor del formulario o Load el método de control de eventos.To run this example, paste the code into a Windows Form and call the InitializeControlsAndData method from the form's constructor or Load event-handling method.

private void InitializeControlsAndData()
{
    // Initialize the controls and set location, size and 
    // other basic properties.
    this.dataGridView1 = new DataGridView();
    
    this.textBox1 = new TextBox();
    this.textBox2 = new TextBox();
    this.dataGridView1.ColumnHeadersHeightSizeMode =
        DataGridViewColumnHeadersHeightSizeMode.AutoSize;
    this.dataGridView1.Dock = DockStyle.Top;
    this.dataGridView1.Location = new Point(0, 0);
    this.dataGridView1.Size = new Size(292, 150);
    this.textBox1.Location = new Point(132, 156);
    this.textBox1.Size = new Size(100, 20);
    this.textBox2.Location = new Point(12, 156);
    this.textBox2.Size = new Size(100, 20);
    this.ClientSize = new Size(292, 266);
    this.Controls.Add(this.textBox2);
    this.Controls.Add(this.textBox1);
    this.Controls.Add(this.dataGridView1);

    // Declare the DataSet and add a table and column.
    DataSet set1 = new DataSet();
    set1.Tables.Add("Menu");
    set1.Tables[0].Columns.Add("Beverages");

    // Add some rows to the table.
    set1.Tables[0].Rows.Add("coffee");
    set1.Tables[0].Rows.Add("tea");
    set1.Tables[0].Rows.Add("hot chocolate");
    set1.Tables[0].Rows.Add("milk");
    set1.Tables[0].Rows.Add("orange juice");

    
    // Add the control data bindings.
    dataGridView1.DataSource = set1;
    dataGridView1.DataMember = "Menu";
    textBox1.DataBindings.Add("Text", set1,
        "Menu.Beverages", true, DataSourceUpdateMode.OnPropertyChanged);
    textBox2.DataBindings.Add("Text", set1,
        "Menu.Beverages", true, DataSourceUpdateMode.OnPropertyChanged);

    BindingManagerBase bmb = this.BindingContext[set1, "Menu"];
    bmb.BindingComplete += new BindingCompleteEventHandler(bmb_BindingComplete);
  
}

private void bmb_BindingComplete(object sender, BindingCompleteEventArgs e)
{
    // Check if the data source has been updated, and that no error has occurred.
    if (e.BindingCompleteContext ==
        BindingCompleteContext.DataSourceUpdate && e.Exception == null)

        // If not, end the current edit.
        e.Binding.BindingManagerBase.EndCurrentEdit(); ;
}
Dim WithEvents bmb As BindingManagerBase

Private Sub InitializeControlsAndData() 
    ' Initialize the controls and set location, size and 
    ' other basic properties.
    Me.dataGridView1 = New DataGridView()
    
    Me.textBox1 = New TextBox()
    Me.textBox2 = New TextBox()
    Me.dataGridView1.ColumnHeadersHeightSizeMode = _
        DataGridViewColumnHeadersHeightSizeMode.AutoSize
    Me.dataGridView1.Dock = DockStyle.Top
    Me.dataGridView1.Location = New Point(0, 0)
    Me.dataGridView1.Size = New Size(292, 150)
    Me.textBox1.Location = New Point(132, 156)
    Me.textBox1.Size = New Size(100, 20)
    Me.textBox2.Location = New Point(12, 156)
    Me.textBox2.Size = New Size(100, 20)
    Me.ClientSize = New Size(292, 266)
    Me.Controls.Add(Me.textBox2)
    Me.Controls.Add(Me.textBox1)
    Me.Controls.Add(Me.dataGridView1)
    
    ' Declare the DataSet and add a table and column.
    Dim set1 As New DataSet()
    set1.Tables.Add("Menu")
    set1.Tables(0).Columns.Add("Beverages")
    
    ' Add some rows to the table.
    set1.Tables(0).Rows.Add("coffee")
    set1.Tables(0).Rows.Add("tea")
    set1.Tables(0).Rows.Add("hot chocolate")
    set1.Tables(0).Rows.Add("milk")
    set1.Tables(0).Rows.Add("orange juice")

    ' Add the control data bindings.
    dataGridView1.DataSource = set1
    dataGridView1.DataMember = "Menu"
    textBox1.DataBindings.Add("Text", set1, "Menu.Beverages", _
        True, DataSourceUpdateMode.OnPropertyChanged)
    textBox2.DataBindings.Add("Text", set1, "Menu.Beverages", _
        True, DataSourceUpdateMode.OnPropertyChanged)

    ' Get the BindingManagerBase for this binding.
    bmb = Me.BindingContext(set1, "Menu")

End Sub

Private Sub bmb_BindingComplete(ByVal sender As Object, ByVal e As BindingCompleteEventArgs) _
    Handles bmb.BindingComplete

    ' Check if the data source has been updated, and that no error has occurred.
    If e.BindingCompleteContext = BindingCompleteContext.DataSourceUpdate _
        AndAlso e.Exception Is Nothing Then

        ' If not, end the current edit.
        e.Binding.BindingManagerBase.EndCurrentEdit()
    End If
End Sub

Comentarios

El BindingComplete evento tiene lugar después de completar una operación de enlace de datos, que puede incluir lo siguiente:The BindingComplete event occurs after the completion of a data-binding operation, which may include the following:

  • Insertar la información del origen de datos en la propiedad de su control enlazado.Pushing information from the data source into the property of its bound control.

  • Extracción de información de un control enlazado a su origen de datos asociado.Pulling information from a bound control into its associated data source.

Tenga en cuenta que este evento se desencadena independientemente del estado de finalización de la operación de enlace, aunque este estado se puede determinar examinando el BindingCompleteState propiedad de la BindingCompleteEventArgs parámetro asociado al evento.Note that this event is raised regardless of the completion status of the binding operation, although this status can be determined by examining the BindingCompleteState property of the BindingCompleteEventArgs parameter associated with the event. BindingCompleteEventArgs También puede contener la información de errores y excepciones.BindingCompleteEventArgs may also contain error and exception information. Por ejemplo, una operación de enlace que intenta insertar un valor null desde un origen de datos en un DateTimePicker control generará una excepción, ya que un DateTime no puede ser null.For example, a binding operation that attempts to push a null value from a data source into a DateTimePicker control will generate an exception, since a DateTime cannot be null. En este caso, aunque la operación de enlace no se completa correctamente, el BindingComplete , se generará el evento y el evento contendrá información sobre el intento fallido de enlace.In this case, although the binding operation does not successfully complete, the BindingComplete event will be raised, and the event will contain information on the failed binding attempt.

Se aplica a

Consulte también: