??? ??? ????? ??????? ?? ????? ASP.NET ???????? Visual C# .NET ??????? ???????

??????? ??????? ?? ASP.NET

????? ??????? ??????? Page_Error

1. ???? ??????? ??????? ?????? ??? ???? ???? PageEvent.aspx ??? ???????:
   1. ???? Microsoft Visual Studio .NET.
   2. ?? "?????? ??????" ???? ??? ?????? ?????? ??? ???? ??????? ??? ??? ????? ?? ?? ???? ??? ????? ????? ???.
   3. ?? ???? ???? ??? ???? PageEvent.aspx ??? ?? ???? ??? ???.
2. ????? ???????? ???????? ??????? ??? PageEvent.aspx:

   <script language=C# runat="server">
   void Page_Load(object sender, System.EventArgs e)
   {
   	throw(new ArgumentNullException());
   }
   
   public void Page_Error(object sender,EventArgs e)
   {
   	Exception objErr = Server.GetLastError().GetBaseException();
   	string err =	"<b>Error Caught in Page_Error event</b><hr><br>" + 
   			"<br><b>Error in: </b>" + Request.Url.ToString() +
   			"<br><b>Error Message: </b>" + objErr.Message.ToString()+
   			"<br><b>Stack Trace:</b><br>" + 
   	                  objErr.StackTrace.ToString();
   	Response.Write(err.ToString());
   	Server.ClearError();
   }
   </script> 
   					

   
   ?????? ?? ??? ?????? ??? ??? AutoEventWireup ?? ??? ????? ?????. ??? ??? ??? ????? ????? ???? ??? ????? AutoEventWireup, ??? ??????? ?? ?????????? ???? ?????. ??? ??? ?????? Visual Studio .NET "?????? ?????????, ??? ????" ????? ??? "???? ???? ?????? ???? ????? AutoEventWireup ??? false. ???? ?????? ??? ??? ?????? ?????????? ???? ???????? ASP.NET ? ?????? ?????????? ?????? ????????? ???????? ???? Visual Studio .NET ??? ?????. ??? ?? ????? ???? ????? AutoEventWireup ??? false "? ?? ????? ??????? ??????? ???? ?? ??????? ?? ???? .ASPX. ?? ???? ?????? ??? ?? ??? ???? ??? ??? ???????.
3. ?? ??????? ???? ???? ??? ??? PageEvent.aspx.
4. ???? ??? ?????? ?????? ??? ?????? ?? ???? ??? ??? ?? ?????? ?????? ??????. ???? ?? ????? ??? ?????? ????? ???????? ??? ??????? ????????? ????????.

????? ??????? ??????? Application_Error

1. ????? ??? ???? ???? AppEvent.aspx ??? ???????.
2. ?? ?????? ????????? ???????? ??????? ??? AppEvent.aspx:

   <script language=C# runat="server">
   	void Page_Load(object sender, System.EventArgs e)
   	{
   		throw(new ArgumentNullException());
   	}
   </script>
   					

   
   ?????? ????? ????????? ??? ???????? ?? ?????? "Page_Error" ??? ??? AutoEventWireup ????? ??? ????? ????????? ???????? ?? ??? ??????. ???? ????????? ??????? ?? ????? "Page_Error" ?????? ??? ???? ?? ????????.
3. ?? ??????? ???? ???? ??? ??? AppEvent.aspx.
4. ????? ????? ????? Application_Error ??? ??? Global.asax ??? ?????? ??? ??????? ?? ????? ??????? Page_Load ?????? AppEvent.aspx. ???? ??? ??? ????? ????? ???????? ??? ?????? ????? System.Diagnostics Global.asax ???????? ??? ???????.
   
   ?? ?????? ????????? ???????? ??????? ??? ??? Global.asax:

   using System.Diagnostics;
   
   protected void Application_Error(object sender, EventArgs e)
   {
   	Exception objErr = Server.GetLastError().GetBaseException();
   	string err =	"Error Caught in Application_Error event\n" +
   			"Error in: " + Request.Url.ToString() +
   			"\nError Message:" + objErr.Message.ToString()+ 
   			"\nStack Trace:" + objErr.StackTrace.ToString();
   	EventLog.WriteEntry("Sample_WebApp",err,EventLogEntryType.Error);
   	Server.ClearError();
   	//additional actions...
   } 
   					

5. ??? ????? Global.asax.
6. ?? Visual Studio .NET ? ?? ??????? ????? ? ???? ??? ?????.
7. ???? ??? ?????? ?????? ??? ?????? ?? ???? ??? ??? ?? ??????. ?? ??? ?????? ???? ?????? ?????, ??? ????? ?? ???? ??? ?? ????? ????? ????? ???? ?? ??? ???????. ???? ??? ??????? ????? ?? ??? ??????? ???? ???? ?????? ????? ?? "???? ???????". ??? ????? ????? ?? ????? ??? ????? ????? ???????? ??? ???? ??? ??????? ??????? ???????? ?????? ???? ???? ?? ???? ??? ????????? ?????? ??? ??????.

????? ??????? ??? Web.config

1. ??? ??? Global.asax ?? ?????? ??????.
2. ????? ?????? ??? Server.ClearError ????? surfaces ????? ?? Web.config ?????.
3. ??? ????????? ??? Global.asax. ??? ?? ???? ???????? ???????? ?????? ?? ???? ?????? ??? ???:

   using System.Diagnostics;
   
   protected void Application_Error(object sender, EventArgs e)
   {
   	Exception objErr = Server.GetLastError().GetBaseException();
   	string err =	"Error Caught in Application_Error event\n" +
   			"Error in: " + Request.Url.ToString() +
   			"\nError Message:" + objErr.Message.ToString() + 
   			"\nStack Trace:" + objErr.StackTrace.ToString();
   	EventLog.WriteEntry("Sample_WebApp",err,EventLogEntryType.Error);
   	//Server.ClearError();
   	//additional actions...
   } 
   					

4. ?? ?????? ???????? ???????? ??????? ??? ?????? <customerrors>?????? ????? ???????? ??? ???? ?????:

   <customErrors defaultRedirect="http://hostName/applicationName/errorStatus.htm" mode="On">
   </customErrors>
   						

   ?????? ??? ?? ????? ????? ???? ????? ?? ????? "defaultRedirect ???? ???? ???? ??? ??? ????? ???? ???????.
5. ???? ??? ????? ????? trapped ?? ??? ??????? ??? ???? ??????? ???????? ? ??? ?? ???? ?????? ???? ??? ???? ErrorStatus.htm. ?? ?? ???????? ??????? ??? ??????? ?????? ?? ??? ????? ????????? ???? ?????? ??? ?????? ??? ???? .htm ???? ?????. ?? ?????? ????????? ???????? ??????? ??? ErrorStatus.htm:

   <HTML>
   <HEAD>
   <TITLE></TITLE>
   <META NAME="GENERATOR" Content="Microsoft Visual Studio 7.0">
   </HEAD>
   <BODY>
        <b>Custom Error page!</b>
        <br>
        You have been redirected here from the <customErrors> section of the 
        Web.config file.
   </BODY>
   </HTML>
   					

6. ??????? ???????? ???????? ??? ??????? ????? ??????? ?? ?? ???? AppEvent.aspx ?? ????????. ???? ??? ??? ??? ?????, ??? ????? ?????? ??? ???? ErrorStatus.htm.

<customErrors defaultRedirect="http://hostName/applicationName/errorStatus.htm" mode="On">
	<error statusCode="404" redirect="filenotfound.htm" />
</customErrors>
				

• ???: ??????????? ??? ???????? ????? ???????? ??? ?????? ??????? defaultRedirect. ??? ??????? ??? ????? ???? ????? ?? ???????.
• ?????: ???? ??????? ??????? ??????????? ?? ??? ????? ?????? ??? ???? defaultRedirect. ??? ??????? ??? ????? ???? ????? ?? ?????.
• RemoteOnly: ??? ????? ?????????? ????? ?????? ??????? ??? ?????? ??????? ??? ????????? ?????? (???????? localhost) ??????? ???????. ??? ????? ????? ???? ?????????? ??????? ??? ?????? "defaultRedirect". ??? ??????? ??? ????? ???? ????? ?? ??? ???????.

??????? ??????? ????????

???? ??? ?????? | ????? ???????