DataRepeater.CurrentItemIndexChanged Event

Occurs when the CurrentItemIndex changes.

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

Syntax

public event EventHandler CurrentItemIndexChanged

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

member CurrentItemIndexChanged : IEvent<EventHandler,
    EventArgs>

Public Event CurrentItemIndexChanged As EventHandler

Remarks

The CurrentItemIndex changes when the user selects a new DataRepeaterItem or when the CurrentItemIndex is set in code.

Setting the CurrentItemIndex property scrolls the DataRepeaterItem that has the equivalent index into view.

For more information about how to handle events, see Handling and Raising Events.

Examples

The following example demonstrates how to use the CurrentItem property to make changes when an item is selected. It assumes that you have a form that contains a bound DataRepeater named DataRepeater1, a bound TextBox named UnitsInStockTextBox, and a Label named LowStockWarningLabel.

private void dataRepeater1_CurrentItemIndexChanged(object sender, System.EventArgs e)
{
    // Exit if the control is first loading.
    if (dataRepeater1.CurrentItem == null) { return; }
    // Check for zero quantity.
    if (dataRepeater1.CurrentItem.Controls["unitsInStockTextBox"].Text == "0") 
    // Display a the warning label on the form.
    {
        this.lowStockWarningLabel.Visible = true;
    }
    else
    {
        this.lowStockWarningLabel.Visible = false;
    }
}

Private Sub DataRepeater1_CurrentItemIndexChanged(
  ) Handles DataRepeater1.CurrentItemIndexChanged

    ' Exit if the control is first loading.
    If DataRepeater1.CurrentItem Is Nothing Then Exit Sub
    ' Check for zero or negative quantity.
    If CDbl(
        DataRepeater1.CurrentItem.Controls("UnitsInStockTextBox").Text
       ) < 1 Then
        ' Display a the warning label on the form.
        Me.LowStockWarningLabel.Visible = True
    Else
        Me.LowStockWarningLabel.Visible = False
    End If
End Sub

See Also

CurrentItemIndex
DataRepeater Class
Microsoft.VisualBasic.PowerPacks Namespace
Introduction to the DataRepeater Control (Visual Studio)

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