TreeViewCancelEventArgs.Action Property
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets the type of TreeView action that raised the event.
public:
property System::Windows::Forms::TreeViewAction Action { System::Windows::Forms::TreeViewAction get(); };public System.Windows.Forms.TreeViewAction Action { get; }member this.Action : System.Windows.Forms.TreeViewActionPublic ReadOnly Property Action As TreeViewActionProperty Value
One of the TreeViewAction values.
Examples
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" );
}
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.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "Action", e.Action)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "Cancel", e.Cancel)
messageBoxVB.AppendLine()
MessageBox.Show(messageBoxVB.ToString(),"BeforeCheck Event")
End Sub
