TreeViewCancelEventArgs.Action Property

 

Gets the type of TreeView action that raised the event.

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

public TreeViewAction Action { get; }

Property Value

Type: System.Windows.Forms.TreeViewAction

One of the TreeViewAction values.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the TreeView.BeforeCheck 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 TreeView named TreeView1. Then ensure that the event handler is associated with the TreeView.BeforeCheck event.

private void TreeView1_BeforeCheck(Object sender, TreeViewCancelEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "Node", e.Node );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Action", e.Action );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Cancel", e.Cancel );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "BeforeCheck Event" );
}

.NET Framework
Available since 1.1
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