BindingSource.RemoveAt(Int32) BindingSource.RemoveAt(Int32) BindingSource.RemoveAt(Int32) BindingSource.RemoveAt(Int32) Method

Definición

Quita el elemento situado en el índice especificado de la lista.Removes the item at the specified index in the list.

public:
 virtual void RemoveAt(int index);
public virtual void RemoveAt (int index);
abstract member RemoveAt : int -> unit
override this.RemoveAt : int -> unit
Public Overridable Sub RemoveAt (index As Integer)

Parámetros

index
Int32 Int32 Int32 Int32

Índice de base cero del elemento que se va a quitar.The zero-based index of the item to remove.

Implementaciones

Excepciones

index es menor que cero o mayor que el valor de la propiedad Count.index is less than zero or greater than the value of the Count property.

La lista subyacente representada por la propiedad List es de sólo lectura o tiene un tamaño fijo.The underlying list represented by the List property is read-only or has a fixed size.

Ejemplos

En el ejemplo de código siguiente Listse RemoveAtmuestran los Count miembros, y.The following code example demonstrates the List, RemoveAt, and Count members. Para ejecutar este ejemplo, pegue el código en un formulario que contenga BindingSource un BindingSource1denominado, dos etiquetas label1 denominadas y label2, y un button1botón denominado.To run this example, paste the code into a form that contains a BindingSource named BindingSource1, two labels named label1 and label2, and a button named button1. Asocie el button1_Click método con el Click evento para button1.Associate the button1_Click method with the Click event for button1. Visual Basic los usuarios tendrán que agregar una referencia a System. Data. dll.Visual Basic users will need to add a reference to System.Data.dll.

private void button1_Click(object sender, EventArgs e)
{
    // Create the connection string, data adapter and data table.
    SqlConnection connectionString =
         new SqlConnection("Initial Catalog=Northwind;" +
         "Data Source=localhost;Integrated Security=SSPI;");
    SqlDataAdapter customersTableAdapter =
        new SqlDataAdapter("Select * from Customers", connectionString);
    DataTable customerTable = new DataTable();

    // Fill the adapter with the contents of the customer table.
    customersTableAdapter.Fill(customerTable);

    // Set data source for BindingSource1.
    BindingSource1.DataSource = customerTable;

    // Set the label text to the number of items in the collection before
    // an item is removed.
    label1.Text = "Starting count: " + BindingSource1.Count.ToString();

    // Access the List property and remove an item.
    BindingSource1.List.RemoveAt(4);

    // Remove an item directly from the BindingSource. 
    // This is equivalent to the previous line of code.
    BindingSource1.RemoveAt(4);

    // Show the new count.
    label2.Text = "Count after removal: " + BindingSource1.Count.ToString();
}
    Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) _
        Handles button1.Click

        ' Create the connection string, data adapter and data table.
        Dim connectionString As New SqlConnection("Initial Catalog=Northwind;" & _
            "Data Source=localhost;Integrated Security=SSPI;")
        Dim customersTableAdapter As New SqlDataAdapter("Select * from Customers", _
            connectionString)
        Dim customerTable As New DataTable()

        ' Fill the adapter with the contents of the customer table.
        customersTableAdapter.Fill(customerTable)

        ' Set data source for BindingSource1.
        BindingSource1.DataSource = customerTable

        ' Set the label text to the number of items in the collection before
        ' an item is removed.
        label1.Text = "Starting count: " + BindingSource1.Count.ToString()

        ' Access the List property and remove an item.
        BindingSource1.List.RemoveAt(4)

        ' Remove an item directly from the BindingSource. 
        ' This is equivalent to the previous line of code.
        BindingSource1.RemoveAt(4)

        ' Show the new count.
        label2.Text = "Count after removal: " + BindingSource1.Count.ToString()

    End Sub
End Class

Comentarios

Estas dos condiciones se pueden probar con las IsFixedSize propiedades IsReadOnly y, respectivamente.These two conditions can be tested with the IsFixedSize and IsReadOnly properties, respectively.

Este método genera el ListChanged evento.This method raises the ListChanged event.

Se aplica a

Consulte también: