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Splitter.SplitterMoving Event

Occurs when the splitter control is in the process of moving. Splitter.SplitterMoving has been replaced by SplitContainer.SplitterMoving and is provided only for compatibility with previous versions.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

'Declaration
Public Event SplitterMoving As SplitterEventHandler

You can create an event handler for the SplitterMoving event to perform resize validation in your application. For example, if a Splitter control is docked to the edges of a TreeView control and a ListView control, you can write code in the SplitterMoved event to determine if the minimum and/or maximum size for the TreeView and ListView controls has been exceeded and restrict the resizing of the controls to their minimum or maximum size.

For more information about handling events, see Handling and Raising Events.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the SplitterMoving event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.

To run the example code, paste it into a project that contains an instance of type Splitter named Splitter1. Then ensure that the event handler is associated with the SplitterMoving event.

Private Sub Splitter1_SplitterMoving(sender as Object, e as SplitterEventArgs) _ 
     Handles Splitter1.SplitterMoving

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "X", e.X)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Y", e.Y)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "SplitX", e.SplitX)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "SplitY", e.SplitY)
    messageBoxVB.AppendLine()
    MessageBox.Show(messageBoxVB.ToString(),"SplitterMoving Event")

End Sub

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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