ChangePassword.OnSendingMail(MailMessageEventArgs) 方法

参考

定义

命名空间:: System.Web.UI.WebControls

程序集:: System.Web.dll

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。

在电子邮件发送到 SMTP 服务器进行处理之前引发 SendingMail 事件。然后，SMTP 服务器将电子邮件发送给用户。

protected:
 virtual void OnSendingMail(System::Web::UI::WebControls::MailMessageEventArgs ^ e);

protected virtual void OnSendingMail (System.Web.UI.WebControls.MailMessageEventArgs e);

abstract member OnSendingMail : System.Web.UI.WebControls.MailMessageEventArgs -> unit
override this.OnSendingMail : System.Web.UI.WebControls.MailMessageEventArgs -> unit

Protected Overridable Sub OnSendingMail (e As MailMessageEventArgs)

参数

e: MailMessageEventArgs

一个包含事件数据的 MailMessageEventArgs 对象。

示例

下面的代码示例演示了一个使用 ChangePassword Web 控件的 ASP.NET 页，并包含名为 SendingMail的事件的SendingMail事件处理程序。代码示例假定 ASP.NET 网站已配置为使用成员身份和窗体身份验证 ASP.NET，并且已创建名称和密码已知的用户。有关详细信息，请参阅如何：实现简单表单身份验证。

如果密码更改成功，代码将尝试使用 SMTP 向用户发送电子邮件以确认更改。这是在事件处理程序中完成的SendingMail 。有关如何配置 SMTP 服务器的信息，请参阅如何：在 IIS 6.0 中安装和配置 SMTP 虚拟服务器。就此示例而言，无需配置 SMTP 服务器;构造示例是为了测试发送电子邮件失败。

如果邮件服务器配置不正确或发生其他错误，并且无法发送电子邮件， SendMailError 则调用函数。向用户显示一条消息。此外，将事件记录到 Windows 应用程序事件日志中，假设已存在名为 MySamplesSite 的事件源。请参阅下面的代码示例来创建指定的事件源。有关创建事件源的详细信息，请参阅 ASP.NET Web 窗体页中的服务器事件处理。对象的 Handled 属性 SendMailErrorEventArgs 设置为以 true 指示已处理错误。

<%@ Page Language="C#" AutoEventWireup="True" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void MySendingMail(object sender, MailMessageEventArgs e)
  {
    Message1.Text = "Sent mail to you to confirm the password change.";
  }

  void MySendMailError(object sender, SendMailErrorEventArgs e)
  {
    Message1.Text = "Could not send email to confirm password change.";

    // The MySamplesSite event source has already been created by an administrator.
    System.Diagnostics.EventLog myLog = new System.Diagnostics.EventLog();
    myLog.Log = "Application";
    myLog.Source = "MySamplesSite";
    myLog.WriteEntry(
        "Sending mail via SMTP failed with the following error: " + 
        e.Exception.Message.ToString(), 
        System.Diagnostics.EventLogEntryType.Error);

    e.Handled = true;
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>ChangePassword including a SendMailError Event</title>
</head>
<body>
  <form id="form1" runat="server">
  <div style="text-align:center">

    <h1>ChangePassword</h1>
    
    <asp:LoginView ID="LoginView1" Runat="server" 
      Visible="true">
      <LoggedInTemplate>
        <asp:LoginName ID="LoginName1" Runat="server" FormatString="You are logged in as {0}." />
        <br />
      </LoggedInTemplate>
      <AnonymousTemplate>
        You are not logged in
      </AnonymousTemplate>
    </asp:LoginView><br />
    
    <asp:ChangePassword ID="ChangePassword1" Runat="server"
      BorderStyle="Solid" 
      BorderWidth="1" 
      CancelDestinationPageUrl="~/Default.aspx" 
      DisplayUserName="true"
      OnSendingMail="MySendingMail" 
      OnSendMailError="MySendMailError" 
      ContinueDestinationPageUrl="~/Default.aspx" >
      <MailDefinition 
        BodyFileName="~\MailFiles\ChangePasswordMail.htm" 
        Subject="Activity information for you">
        <EmbeddedObjects>
          <asp:EmbeddedMailObject Name="LoginGif" Path="~\MailFiles\Login.gif" />
          <asp:EmbeddedMailObject Name="PrivacyNoticeTxt" Path="~\MailFiles\PrivacyNotice.txt" />
        </EmbeddedObjects>
      </MailDefinition>
    </asp:ChangePassword><br />
  
    <asp:Label ID="Message1" Runat="server" ForeColor="Red" /><br />

    <asp:HyperLink ID="HyperLink1" Runat="server" 
      NavigateUrl="~/Default.aspx">
      Home
    </asp:HyperLink>
    
  </div>
  </form>
</body>
</html>

<%@ Page Language="VB" AutoEventWireup="True" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

  Public Sub MySendingMail(ByVal Sender As Object, ByVal e As MailMessageEventArgs)
    Message1.Text = "Sent mail to you to confirm the password change."
  End Sub

  Public Sub MySendMailError(ByVal Sender As Object, ByVal e As SendMailErrorEventArgs)
    Message1.Text = "Could not send mail to confirm the password change."
    
    ' The MySamplesSite event source has already been created by an administrator.
    Dim myLog As System.Diagnostics.EventLog
    myLog = new System.Diagnostics.EventLog
    myLog.Log = "Application"
    myLog.Source = "MySamplesSite"
    myLog.WriteEntry("Sending mail via SMTP failed with the following error: " & e.Exception.Message.ToString(), System.Diagnostics.EventLogEntryType.Error)

    e.Handled = True
    
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>ChangePassword including a SendMailError Event</title>
</head>
<body>
  <form id="form1" runat="server">
  <div style="text-align:center">

    <h1>ChangePassword</h1>
    
    <asp:LoginView ID="LoginView1" Runat="server" 
      Visible="true">
      <LoggedInTemplate>
        <asp:LoginName ID="LoginName1" Runat="server" FormatString="You are logged in as {0}." />
        <br />
      </LoggedInTemplate>
      <AnonymousTemplate>
        You are not logged in
      </AnonymousTemplate>
    </asp:LoginView><br />
    
    <asp:ChangePassword ID="ChangePassword1" Runat="server"
      BorderStyle="Solid" 
      BorderWidth="1" 
      CancelDestinationPageUrl="~/Default.aspx" 
      DisplayUserName="true"
      OnSendingMail="MySendingMail" 
      OnSendMailError="MySendMailError" 
      ContinueDestinationPageUrl="~/Default.aspx" >
      <MailDefinition 
        BodyFileName="~\MailFiles\ChangePasswordMail.htm" 
        Subject="Activity information for you">
        <EmbeddedObjects>
          <asp:EmbeddedMailObject Name="LoginGif" Path="~\MailFiles\Login.gif" />
          <asp:EmbeddedMailObject Name="PrivacyNoticeTxt" Path="~\MailFiles\PrivacyNotice.txt" />
        </EmbeddedObjects>
      </MailDefinition>
    </asp:ChangePassword><br />
  
    <asp:Label ID="Message1" Runat="server" ForeColor="Red" /><br />

    <asp:HyperLink ID="HyperLink1" Runat="server" 
      NavigateUrl="~/Default.aspx">
      Home
    </asp:HyperLink>
    
  </div>
  </form>
</body>
</html>

如果需要以编程方式将名为 MySamplesSite 的事件源添加到应用程序日志，请使用以下代码示例。必须存在此事件源，第一个代码示例才能正常工作。以下代码示例需要管理员权限。

#region Using directives

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;

#endregion

namespace CreateEventSource
{
    class Program
    {
        static void Main(string[] args)
        {

            try
            {
                // Create the source, if it does not already exist.
                if (!EventLog.SourceExists("MySamplesSite"))
                {
                    EventLog.CreateEventSource("MySamplesSite", "Application");
                    Console.WriteLine("Creating Event Source");
                }

                // Create an EventLog instance and assign its source.
                EventLog myLog = new EventLog();
                myLog.Source = "MySamplesSite";

                // Write an informational entry to the event log.    
                myLog.WriteEntry("Testing writing to event log.");

                Console.WriteLine("Message written to event log.");
            }
            catch (Exception e)
            {
                Console.WriteLine("Exception:");
                Console.WriteLine("{0}", e.ToString());
            }
        }
    }
}

Imports System.Collections.Generic
Imports System.Text
Imports System.Diagnostics


Namespace CreateEventSource
  Class Program
    Sub Main()

        Try
            ' Create the source, if it does not already exist.
            If Not (EventLog.SourceExists("MySamplesSite")) Then
                EventLog.CreateEventSource("MySamplesSite", "Application")
                Console.WriteLine("Creating Event Source")
            End If

            ' Create an EventLog instance and assign its source.
            Dim myLog As New EventLog
            myLog.Source = "MySamplesSite"

            ' Write an informational entry to the event log.
            myLog.WriteEntry("Testing writing to event log.")

            Console.WriteLine("Message written to event log.")
        Catch e As Exception
            Console.WriteLine("Exception:")
            Console.WriteLine(e.ToString)
        End Try

    End Sub
  End Class
End Namespace

以下示例代码可用作上一示例代码的 ChangePasswordMail.htm 文件。

重要

通过电子邮件发送用户帐户名或密码是潜在的安全威胁。电子邮件通常以纯文本形式发送，可由特殊网络“探查”应用程序读取。若要提高安全性，请使用保护登录控件中所述的缓解措施。

<html>  
<head><title></title></head>  
<body>  
<form>  

  <h1>Your password for the account named &quot;<%Username%>&quot; has changed.</h1>  

  <p>  
  If you did not initiate this change, please call 1-206-555-0100.  
  </p>  

  <p>  
  <a href="http://www.contoso.com/login.aspx">  
    <img src="cid:LoginGif" alt="Log In" />  
  </a>   
  </p>  

  <p>  
  Please read our attached Privacy Notice.  
  </p>  

</form>  
</body>  
</html>

注解

OnSendingMail使用方法可修改在用户更改密码后发送给用户的电子邮件。对象的 Message 属性 MailMessageEventArgs 将发送到 SMTP 服务器进行处理。修改对象的属性 MailMessage 以修改电子邮件。

仅当由属性指定的对象的属性MailDefinition指向有效的文件名时BodyFileName，MailDefinition才会创建电子邮件。

重要

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 ASP.NET Web 窗体页中的服务器事件处理。

OnSendingMail 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 OnSendingMail(MailMessageEventArgs) 方法时，请务必为基类调用 OnSendingMail(MailMessageEventArgs) 方法，以便注册的委托接收事件。

适用于

通过

ChangePassword.OnSendingMail(MailMessageEventArgs) 方法

定义

参数

示例

注解

继承者说明

适用于

另请参阅

其他资源