PasswordRecovery.OnAnswerLookupError(EventArgs) 方法
定义
引发 AnswerLookupError 事件。Raises the AnswerLookupError event.
protected:
virtual void OnAnswerLookupError(EventArgs ^ e);
protected virtual void OnAnswerLookupError (EventArgs e);
abstract member OnAnswerLookupError : EventArgs -> unit
override this.OnAnswerLookupError : EventArgs -> unit
Protected Overridable Sub OnAnswerLookupError (e As EventArgs)
参数
示例
下面的代码示例创建一个自定义 PasswordRecovery 控件,该控件在 OnAnswerLookupError QuestionTitleText 用户输入密码确认问题的错误答案时重写方法以更改属性。The following code example creates a custom PasswordRecovery control that overrides the OnAnswerLookupError method to change the QuestionTitleText property if the user enters an incorrect answer to the password confirmation question.
<%@ page language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
class CustomPasswordRecovery : PasswordRecovery
{
override protected void OnAnswerLookupError(EventArgs e)
{
QuestionTitleText = "Try again";
TitleTextStyle.ForeColor = System.Drawing.Color.Red;
base.OnAnswerLookupError(e);
}
}
// Add the custom password recovery control to the page.
void Page_Init(object sender, EventArgs e)
{
CustomPasswordRecovery passwordRecoveryControl = new CustomPasswordRecovery();
passwordRecoveryControl.ID = "passwordRecoveryControl";
PlaceHolder1.Controls.Add(passwordRecoveryControl);
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>ASP.NET Example</title>
</head>
<body>
<form id="form1" runat="server">
<p>
<asp:placeholder id="PlaceHolder1" runat="server"></asp:placeholder> </p>
</form>
</body>
</html>
<%@ page language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Class CustomPasswordRecovery
Inherits PasswordRecovery
Overloads Sub OnAnswerLookupError(ByVal e As EventArgs)
QuestionTitleText = "Try again"
TitleTextStyle.ForeColor = System.Drawing.Color.Red
MyBase.OnAnswerLookupError(e)
End Sub
End Class
' Add the custom password recovery control to the page.
Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs)
Dim passwordRecoveryControl As New CustomPasswordRecovery
passwordRecoveryControl.ID = "passwordRecoveryControl"
PlaceHolder1.Controls.Add(passwordRecoveryControl)
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>ASP.NET Example</title>
</head>
<body>
<form id="form1" runat="server">
<p>
<asp:placeholder id="PlaceHolder1" runat="server"></asp:placeholder> </p>
</form>
</body>
</html>
注解
OnAnswerLookupError当用户对密码恢复确认问题的答案与网站数据存储中存储的答案不匹配时,将调用方法。The OnAnswerLookupError method is called when the user's answer to the password recovery confirmation question does not match the answer stored in the Web site data store. 默认实现将引发 AnswerLookupError 事件。The default implementation raises the AnswerLookupError event.
引发事件时,将通过委托调用事件处理程序。Raising an event invokes the event handler through a delegate. 有关详细信息,请参阅 处理和引发事件。For more information, see Handling and Raising Events.
OnAnswerLookupError 方法还允许派生类对事件进行处理而不必附加委托。The OnAnswerLookupError method also allows derived classes to handle the event without attaching a delegate. 这是在派生类中处理事件的首选技术。This is the preferred technique for handling the event in a derived class.
继承者说明
在派生类中重写 OnAnswerLookupError(EventArgs) 时,一定要调用基类的 OnAnswerLookupError(EventArgs) 方法,以便已注册的委托对事件进行接收。When overriding OnAnswerLookupError(EventArgs) in a derived class, be sure to call the base class's OnAnswerLookupError(EventArgs) method so that registered delegates receive the event.