1包含页面：Default.aspx，Error.aspx
2.思路：Global.asax页面负责捕捉系统中除去try以外发生的页面错误。并将错信息发送给Error.aspx页面。Error.aspx页面负责显示错误信息，并将错误信息发送到指定邮箱。
3.具体代码：
Default.aspx页面
Code
html部分：
<body>
<form id="form1" runat="server">
<div>
</div>
<asp:DropDownList ID="DropDownList1" runat="server" DataTextField="Name"
DataValueField="id">
</asp:DropDownList>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</form>
</body>
cs部分：
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("id",typeof(string)));
dt.Columns.Add(new DataColumn("name", typeof(string)));
dt.Rows.Add(dt.NewRow());
dt.Rows[0][0] = "1";
dt.Rows[0][1] = "1";
this.DropDownList1.DataSource = dt;
this.DropDownList1.DataBind();
}
}
protected void Button1_Click(object sender, EventArgs e)
{
this.DropDownList1.SelectedValue = "fff";
}
Global.asax代码：
Code
<%@ Import Namespace ="System.Web" %>
void Application_Error(object sender, EventArgs e)
{
Exception LastError = Server.GetLastError();
if (LastError != null)
Response.Redirect("error.aspx?error="+LastError.InnerException.ToString().Replace("\r\n",""));
}
Error.aspx代码：
Code
html部分：
<body>
<form id="form1" runat="server">
<div style="background-color: #99CCFF; height: 252px;">
抱歉：发生了错误。
<div style="background-color:Silver"><asp:Label ID="Label1" runat="server"
Text="Label"></asp:Label></div>
</div>
</form>
</body>
cs部分：
添加命名空间：
using System.Net.Mail;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
if (Request["error"] != null && Request["error"].Length > 0)
{
this.Label1.Text = Request["error"];
SendMail(Request["error"]);
}
}
}
public void SendMail(string body)
{
MailMessage myMail = new MailMessage();
myMail.From = new MailAddress("myaccount@test.com");
myMail.To.Add("test@test.com");
myMail.Subject = "Error";
myMail.Priority = MailPriority.Normal;
myMail.BodyEncoding = System.Text.Encoding.UTF8;
myMail.Body = body;
SmtpClient smtp = new SmtpClient();
smtp.Host = "mail";
try
{
smtp.Send(myMail);
}
catch (SmtpException ex)
{
this.Label1.Text = "邮件发送失败。\r\n"+ex.Message;
}
}
至此，系统即可实现错误捕捉显示，及邮件发生功能。
