asp.net自定义错误页面

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两种方法均为全站出错处理
方法一：
1、添加Web.config， <system.web></system.web>中添加<customErrors mode="On"

defaultRedirect="ApplicationErroy.aspx" ></customErrors>节点，
2、添加错误处理页面：ApplicationErroy.aspx调用下面的方法：
private void DealErroy()
{
HttpException erroy = new HttpException();
string strCode = erroy.ErrorCode.ToString();
string strMsg = erroy.Message;
erroy.HelpLink = "sss";
Response.Write("ErrorCode:" + strCode + " ");
Response.Write("Message:" + strMsg + " ");
Response.Write("HelpLink:" + erroy.HelpLink + " ");
Response.Write("Source:" + erroy.Source + " ");
Response.Write("TargetSite:" + erroy.TargetSite + " ");
Response.Write("InnerException:" + erroy.InnerException + " ");
Response.Write("StackTrace:" + erroy.StackTrace + " ");
Response.Write("GetHtmlErrorMessage:" + erroy.GetHtmlErrorMessage() + " ");
Response.Write("erroy.GetHttpCode().ToString():" + erroy.GetHttpCode().ToString() +

" ");
Response.Write("erroy.Data.ToString()::" + erroy.Data.ToString() + " ");
}
这种方法不能完整地显示错误信息；
方法二：
1、添加Web.config， <system.web></system.web>中添加<customErrors mode="On"

defaultRedirect="ApplicationErroy.aspx" ></customErrors>节点，
2、添加Global.asax文件，找到Application_Error事件，加入以下代码：
Exception erroy = Server.GetLastError();
string err = "出错页面是：" + Request.Url.ToString() + " ";
err += "异常信息：" + erroy.Message + " ";
err += "Source:" + erroy.Source + " ";
err += "StackTrace:" + erroy.StackTrace + " ";
Server.ClearError();
Application["erroy"] = err;
2、添加错误处理页面：ApplicationErroy.aspx 加入以下代码；
Response.Write(Application["erroy"].ToString());
这种方法能完整地显示错误信息，
最好的办办法还是两种方法一起用最好！

另:web.config中也可以把
<error statusCode="403" redirect="NoAccess.htm" />//访问被禁止
<error statusCode="404" redirect="FileNotFound.htm" />//找不到页面
添加进去

http错误代码含义：
"100" : Continue
"101" : witching Protocols
"200" : OK
"201" : Created
"202" : Accepted
"203" : Non-Authoritative Information
"204" : No Content
"205" : Reset Content
"206" : Partial Content
"300" : Multiple Choices
"301" : Moved Permanently
"302" : Found
"303" : See Other
"304" : Not Modified
"305" : Use Proxy
"307" : Temporary Redirect
"400" : Bad Request
"401" : Unauthorized
"402" : Payment Required
"403" : Forbidden
"404" : Not Found
"405" : Method Not Allowed
"406" : Not Acceptable
"407" : Proxy Authentication Required
"408" : Request Time-out
"409" : Conflict
"410" : Gone
"411" : Length Required
"412" : Precondition Failed
"413" : Request Entity Too Large
"414" : Request-URI Too Large
"415" : Unsupported Media Type
"416" : Requested range not satisfiable
"417" : Expectation Failed
"500" : Internal Server Error
"501" : Not Implemented
"502" : Bad Gateway
"503" : Service Unavailable
"504" : Gateway Time-out
"505" : HTTP Version not supported