BindingManagerBase.DataError BindingManagerBase.DataError BindingManagerBase.DataError BindingManagerBase.DataError Event

定义

ExceptionBindingManagerBase 处理而未给出任何提示时发生。Occurs when an Exception is silently handled by the BindingManagerBase.

public:
 event System::Windows::Forms::BindingManagerDataErrorEventHandler ^ DataError;
public event System.Windows.Forms.BindingManagerDataErrorEventHandler DataError;
member this.DataError : System.Windows.Forms.BindingManagerDataErrorEventHandler 
Public Custom Event DataError As BindingManagerDataErrorEventHandler 

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DataError事件。In the example, an event handler reports on the occurrence of the DataError 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,请将其粘贴到包含继承的类型的实例的项目BindingManagerBase,如PropertyManagerCurrencyManagerTo run the example code, paste it into a project that contains an instance of a type that inherits from BindingManagerBase, such as a PropertyManager or CurrencyManager. 然后该实例命名BindingManagerBase1,并确保事件处理程序相关联DataError事件。Then name the instance BindingManagerBase1 and ensure that the event handler is associated with the DataError event.

private void BindingManagerBase1_DataError(Object sender, BindingManagerDataErrorEventArgs e) {
    System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
    messageBoxCS.AppendFormat("{0} = {1}", "Exception", e.Exception);
    messageBoxCS.AppendLine();
    MessageBox.Show(messageBoxCS.ToString(), "DataError Event");
}
Private Sub BindingManagerBase1_DataError(sender as Object, e as BindingManagerDataErrorEventArgs) _ 
     Handles BindingManagerBase1.DataError

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

End Sub

注解

此事件是信息性和报告公共语言规范 (CLS)-仅符合异常。This event is informational and reports Common Language Specification (CLS)-compliant exceptions only. 若要确定发生了哪种类型的异常,处理此事件,并检查Exception属性的BindingManagerDataErrorEventArgsTo determine what type of exception occurred, handle this event and check the Exception property of the BindingManagerDataErrorEventArgs.

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