TreeView.AfterExpand TreeView.AfterExpand TreeView.AfterExpand TreeView.AfterExpand Event

定义

在展开树节点后发生。Occurs after the tree node is expanded.

public:
 event System::Windows::Forms::TreeViewEventHandler ^ AfterExpand;
public event System.Windows.Forms.TreeViewEventHandler AfterExpand;
member this.AfterExpand : System.Windows.Forms.TreeViewEventHandler 
Public Custom Event AfterExpand As TreeViewEventHandler 

示例

下面的代码示例演示如何使用此成员。The following code example demonstrates the use of this member. 在此示例中,事件处理程序报告 @no__t 的事件发生。In the example, an event handler reports on the occurrence of the AfterExpand event. 此报告可帮助您了解何时发生事件,并可帮助您进行调试。This report helps you learn when the event occurs and can assist you in debugging. 若要报告多个事件或频繁发生的事件,请考虑将 @no__t 0 替换为 Console.WriteLine,或将消息附加到多行 TextBoxTo 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.

若要运行示例代码,请将其粘贴到包含名为 @no__t TreeView 类型实例的项目中。To run the example code, paste it into a project that contains an instance of type TreeView named TreeView1. 然后,确保事件处理程序与 @no__t 0 事件关联。Then ensure that the event handler is associated with the AfterExpand event.

private void TreeView1_AfterExpand(Object sender, TreeViewEventArgs 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();
MessageBox.Show(messageBoxCS.ToString(), "AfterExpand Event" );
}
Private Sub TreeView1_AfterExpand(sender as Object, e as TreeViewEventArgs) _ 
     Handles TreeView1.AfterExpand

    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()
    MessageBox.Show(messageBoxVB.ToString(),"AfterExpand Event")

End Sub

注解

有关如何处理事件的详细信息,请参阅处理和引发事件For more information about how to handle events, see Handling and Raising Events.

适用于

另请参阅