PasswordRecovery.OnUserLookupError(EventArgs) 方法
定义
重要
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引发 UserLookupError 事件。
protected:
virtual void OnUserLookupError(EventArgs ^ e);protected virtual void OnUserLookupError (EventArgs e);abstract member OnUserLookupError : EventArgs -> unit
override this.OnUserLookupError : EventArgs -> unitProtected Overridable Sub OnUserLookupError (e As EventArgs)参数
示例
下面的代码示例定义一个自定义 PasswordRecovery 控件，该控件将替代 OnUserLookupError 方法，以在用户输入密码确认问题的错误答案时更改 UserNameTitleText 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
OnUserLookupError当成员资格提供程序找不到在初始屏幕上输入的用户名时，将调用 方法。 默认实现引发 UserLookupError 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。
OnUserLookupError 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 OnUserLookupError(EventArgs) 时，一定要调用基类的 OnUserLookupError(EventArgs) 方法，以便已注册的委托对事件进行接收。
