TreeViewCancelEventArgs.Action Property


Gets the type of TreeView action that raised the event.

 property System::Windows::Forms::TreeViewAction Action { System::Windows::Forms::TreeViewAction get(); };
public System.Windows.Forms.TreeViewAction Action { get; }
member this.Action : System.Windows.Forms.TreeViewAction
Public ReadOnly Property Action As TreeViewAction

Property Value

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.AppendFormat("{0} = {1}", "Action", e.Action );
messageBoxCS.AppendFormat("{0} = {1}", "Cancel", e.Cancel );
MessageBox.Show(messageBoxCS.ToString(), "BeforeCheck Event" );
Private Sub TreeView1_BeforeCheck(sender as Object, e as TreeViewCancelEventArgs) _ 
     Handles TreeView1.BeforeCheck

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "Node", e.Node)
    messageBoxVB.AppendFormat("{0} = {1}", "Action", e.Action)
    messageBoxVB.AppendFormat("{0} = {1}", "Cancel", e.Cancel)
    MessageBox.Show(messageBoxVB.ToString(),"BeforeCheck Event")

End Sub

Applies to

See also