DataRepeater.AllowUserToAddItemsChanged Event

Occurs when the AllowUserToAddItems property changes.

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

Syntax

'宣告
Public Event AllowUserToAddItemsChanged As EventHandler

public event EventHandler AllowUserToAddItemsChanged

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

member AllowUserToAddItemsChanged : IEvent<EventHandler,
    EventArgs>

JScript does not support events.

Remarks

When the AllowUserToAddItems property is set to True, users can add a new row by clicking the BindingNavigatorAddNewItem ToolStripButton on the BindingNavigator control, or by pressing CTRL+N when a DataRepeaterItem has focus.

When the AllowUserToAddItems property is set to False, the CTRL+N keyboard function is disabled, but the BindingNavigatorAddNewItem ToolStripButton is still enabled. If you want to prevent users from adding rows, you should also disable or remove the BindingNavigatorAddNewItem ToolStripButton on the BindingNavigator control.

For more information about how to handle events, see Consuming Events.

Examples

The following code example demonstrates how to disable the Add button when the AllowUserToAddItems property is set to False. It assumes that you have a form that contains a DataRepeater control named DataRepeater1 and a BindingNavigator control named ProductsBindingSource.

Private Sub DataRepeater1_AllowUserToAddItemsChanged(
    ) Handles DataRepeater1.AllowUserToAddItemsChanged

    ' If this event occurs during form initialization, exit.
    If Me.IsHandleCreated = False Then Exit Sub
    ' If AllowUserToAddItems is False.
    If DataRepeater1.AllowUserToAddItems = False Then
        ' Disable the Add button.
        BindingNavigatorAddNewItem.Enabled = False
        ' Disable the BindingSource property.
        ProductsBindingSource.AllowNew = False
    Else
        ' Otherwise, enable the Add button.
        BindingNavigatorAddNewItem.Enabled = True
    End If
End Sub

private void dataRepeater1_AllowUserToAddItemsChanged(object sender, System.EventArgs e)
{
    // If this event occurs during form initialization, exit.
    if (this.IsHandleCreated == false) { return; }
    // If AllowUserToAddItems is False.
    if (dataRepeater1.AllowUserToAddItems == false)
    // Disable the Add button.
    {
        bindingNavigatorAddNewItem.Enabled = false;
        // Disable the BindingSource property.
        productsBindingSource.AllowNew = false;
    }
    else
    {
        // Otherwise, enable the Add button.
        bindingNavigatorAddNewItem.Enabled = true;
    }
}

.NET Framework Security

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

See Also

Reference

DataRepeater Class

Microsoft.VisualBasic.PowerPacks Namespace

AllowUserToAddItems

AllowUserToDeleteItems

Other Resources

Introduction to the DataRepeater Control (Visual Studio)

How to: Disable Adding and Deleting DataRepeater Items (Visual Studio)