Evento DataRepeater.AllowUserToDeleteItemsChanged

Artigo
05/17/2015

Ocorre quando a propriedade AllowUserToDeleteItems muda.

Namespace: Microsoft.VisualBasic.PowerPacks
Assembly: Microsoft.VisualBasic.PowerPacks.Vs (em Microsoft.VisualBasic.PowerPacks.Vs.dll)

Sintaxe

'Declaração
Public Event AllowUserToDeleteItemsChanged As EventHandler

public event EventHandler AllowUserToDeleteItemsChanged

public:
 event EventHandler^ AllowUserToDeleteItemsChanged {
    void add (EventHandler^ value);
    void remove (EventHandler^ value);
}

member AllowUserToDeleteItemsChanged : IEvent<EventHandler,
    EventArgs>

JScript não oferece suporte a eventos.

Comentários

When the AllowUserToDeleteItems property is set to True, the user can delete a row by clicking the BindingNavigatorDeleteItem ToolStripButton on the BindingNavigator control, or by pressing DELETE when a DataRepeaterItem has focus.

When the AllowUserToDeleteItems property is set to False, the DELETE keyboard function is disabled, but the BindingNavigatorDeleteItem ToolStripButton is still enabled. If you want to prevent the user from deleting rows, you should also disable or remove the BindingNavigatorDeleteItem ToolStripButton on the BindingNavigator control.

Para obter mais informações sobre como identificar eventos, consulte Manipulando e acionando eventos.

Exemplos

The following code example demonstrates how to disable the BindingNavigatorDeleteItem ToolStripButton button when the AllowUserToAddItems property is set to False. Ele presume que você tenha um formulário que contém um DataRepeater controle chamado DataRepeater1 e um BindingNavigator controle.

Private Sub DataRepeater1_AllowUserToDeleteItemsChanged(
    ) Handles DataRepeater1.AllowUserToDeleteItemsChanged

    ' If this event occurs during form initialization, exit. 
    If Me.IsHandleCreated = False Then Exit Sub 
    ' If AllowUserToDeleteItems is False. 
    If DataRepeater1.AllowUserToDeleteItems = False Then 
        ' Disable the Delete button.
        BindingNavigatorDeleteItem.Enabled = False 
    Else 
        ' Otherwise, enable the Delete button.
        BindingNavigatorDeleteItem.Enabled = True 
    End If 
End Sub 
Private Sub BindingNavigatorDeleteItem_EnabledChanged(
    ) Handles BindingNavigatorDeleteItem.EnabledChanged

    If DataRepeater1.AllowUserToDeleteItems = False Then 
        ' The BindingSource resets this property when a  
        ' new record is selected, so override it. 
        If BindingNavigatorDeleteItem.Enabled = True Then
            BindingNavigatorDeleteItem.Enabled = False 
        End If 
    End If 
End Sub

private void dataRepeater1_AllowUserToDeleteItemsChanged(object sender, System.EventArgs e)
{
    // If this event occurs during form initialization, exit. 
    if (this.IsHandleCreated == false) { return; }
    // If AllowUserToDeleteItems is False. 
    if (dataRepeater1.AllowUserToDeleteItems == false)
    // Disable the Delete button.
    {
        bindingNavigatorDeleteItem.Enabled = false;
    }
    else
    {
        // Otherwise, enable the Delete button.
        bindingNavigatorDeleteItem.Enabled = true;
    }
}
private void bindingNavigatorDeleteItem_EnabledChanged(object sender, System.EventArgs e)
{
    if (dataRepeater1.AllowUserToDeleteItems == false)
    // The BindingSource resets this property when a  
    // new record is selected, so override it.
    {
        if (bindingNavigatorDeleteItem.Enabled == true)
        {
            bindingNavigatorDeleteItem.Enabled = false;
        }
    }
}

Segurança do .NET Framework

Confiança total para o chamador imediato. O membro não pode ser usado por código parcialmente confiável. Para obter mais informações, consulte Usando bibliotecas de código parcialmente confiável.