PasswordRecovery.OnAnswerLookupError(EventArgs) 方法
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
引发 AnswerLookupError 事件。
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,该控件将替代 OnAnswerLookupError 方法,以在用户输入密码确认问题的错误答案时更改 QuestionTitleText 属性。
<%@ 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。 默认实现引发 AnswerLookupError 事件。
引发事件时,将通过委托调用事件处理程序。 有关详细信息,请参阅 处理和引发事件。
OnAnswerLookupError 方法还允许派生类对事件进行处理而不必附加委托。 这是在派生类中处理事件的首选技术。
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。