PropertyGrid.PropertyValueChanged PropertyGrid.PropertyValueChanged PropertyGrid.PropertyValueChanged PropertyGrid.PropertyValueChanged Event

定义

在属性值更改时发生。Occurs when a property value changes.

public:
 event System::Windows::Forms::PropertyValueChangedEventHandler ^ PropertyValueChanged;
public event System.Windows.Forms.PropertyValueChangedEventHandler PropertyValueChanged;
member this.PropertyValueChanged : System.Windows.Forms.PropertyValueChangedEventHandler 
Public Custom Event PropertyValueChanged As PropertyValueChangedEventHandler 

示例

下面的代码示例演示如何将此成员。The following code example demonstrates the use of this member. 在示例中,事件处理程序报告的匹配项PropertyValueChanged事件。In the example, an event handler reports on the occurrence of the PropertyValueChanged event. 此报告可帮助您了解事件发生的并可以帮助您进行调试。This report helps you to learn when the event occurs and can assist you in debugging. 若要报告或频繁发生的事件上多个事件,请考虑更换MessageBox.ShowConsole.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.

若要运行此代码示例,请将其粘贴到包含类型的实例的项目PropertyGrid名为PropertyGrid1To run the example code, paste it into a project that contains an instance of type PropertyGrid named PropertyGrid1. 然后,确保事件处理程序相关联PropertyValueChanged事件。Then ensure that the event handler is associated with the PropertyValueChanged event.

private void PropertyGrid1_PropertyValueChanged(Object sender, PropertyValueChangedEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "ChangedItem", e.ChangedItem );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "OldValue", e.OldValue );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "PropertyValueChanged Event" );
}
Private Sub PropertyGrid1_PropertyValueChanged(sender as Object, e as PropertyValueChangedEventArgs) _ 
     Handles PropertyGrid1.PropertyValueChanged

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "ChangedItem", e.ChangedItem)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "OldValue", e.OldValue)
    messageBoxVB.AppendLine()
    MessageBox.Show(messageBoxVB.ToString(),"PropertyValueChanged Event")

End Sub

注解

有关处理事件的详细信息,请参阅处理和引发事件For more information about handling events, see Handling and Raising Events.

适用于