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How to debug a web appplication?

Hi

I have implemented the ASP.NET Club Site Starter Kit on my 1&1 web
space.
I have recently been getting some errors where the page doesn't load
and just comes up blank. I have put a handler on Application_Error in
global.asax to email me whenever an error occurs. Sometimes I get upto
100 in an hour which is rather concerning.

I have looked at the error message returned but I can't seem to work
out what's causing the error.

How can I debug the application to track down the error? I have quite
a bit of experience with VB.NET so I understand the concept of break
points and stack traces but it all seems a bit scary when it's on the
web.

I have included the code I have in my global.asax and the error message
I get at the bottom of this post. Should I try running the app on
local host or is there some sort of component or change I can make
somewhere to track down the error online?

Note: I didn't write the error notification code. Theres a line which
logs to an event log. Would it help if I un-comment this and see what
that does?

Regards, Carl Gilbert

****** EVENT HANDLER ******

Protected Sub Application_Error(ByVal sender As Object, ByVal e As
System.EventArgs)
Dim objErr As Exception = Server.GetLastError.GetBaseException
Dim strMsg As String = "Error Caught in Application_Error
event\n" + _
"<br>Error in: <a href='" + Request.Url.ToString() + "'>" +
Request.Url.ToString() + "</a>" + _
"\n<br>Error Message:" + objErr.Message.ToString() + _
"\n\n<br><br>REMOTE_ADDR: " +
Request.ServerVariables("REMOTE_ADDR") + "</a>" + _
"\n<br>HTTP_ACCEPT_LANGUAGE: " +
Request.ServerVariables("HTTP_ACCEPT_LANGUAGE") + _
"\n<br>HTTP_REFERER: " +
Request.ServerVariables("HTTP_REFERER") + _
"\n<br>HTTP_USER_AGENT: " +
Request.ServerVariables("HTTP_USER_AGENT") + _
"\n<br>HTTP_COOKIE: " +
Request.ServerVariables("HTTP_COOKIE") + "\n\n\n<br><br>Stack Trace:" +
objErr.StackTrace.ToString
'EventLog.WriteEntry("Sample_WebApp",err,EventLogE ntryType.Error);
Server.ClearError()
Dim strSbj As String = "BWBFC Application Error"
ClubSiteMailer.Mailer.Send(strMsg, strSbj)

End Sub

****** ERROR MESSAGE ******

Error Caught in Application_Error event\n
Error in: http://bwbfc.co.uk/bb/default.aspx\n
Error Message:Request for the permission of type
'System.Security.Permissions.FileIOPermission, mscorlib,
Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
failed.\n\n

REMOTE_ADDR: 217.37.196.9\n
HTTP_ACCEPT_LANGUAGE: en-gb\n
HTTP_REFERER: \n
HTTP_USER_AGENT: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;
SV1; .NET CLR 1.1.4322; InfoPath.1; .NET CLR 2.0.50727; WinFX RunTime
3.0.50727)\n
HTTP_COOKIE: \n\n\n

Stack Trace: at System.Security.CodeAccessSecurityEngine.Check(Obj ect
demand, StackCrawlMark& stackMark, Boolean isPermSet) at
System.Security.CodeAccessPermission.Demand() at
System.IO.Path.GetFullPath(String path) at
System.Web.Util.FileUtil.IsSuspiciousPhysicalPath( String physicalPath,
Boolean& pathTooLong) at
System.Web.Util.FileUtil.IsSuspiciousPhysicalPath( String physicalPath)
at System.Web.CachedPathData.GetConfigPathData(String configPath) at
System.Web.CachedPathData.GetConfigPathData(String configPath) at
System.Web.CachedPathData.GetConfigPathData(String configPath) at
System.Web.CachedPathData.GetVirtualPathData(Virtu alPath virtualPath,
Boolean permitPathsOutsideApp) at
System.Web.HttpContext.GetPathData(VirtualPath path) at
System.Web.Security.UrlAuthorizationModule.IsUserA llowedToPath(HttpContext
context, VirtualPath virtualPath) at
System.Web.UI.Util.IsUserAllowedToPath(HttpContext context, VirtualPath
virtualPath) at
System.Web.SiteMapProvider.IsAccessibleToUser(Http Context context,
SiteMapNode node) at
System.Web.SiteMapNode.IsAccessibleToUser(HttpCont ext context) at
System.Web.StaticSiteMapProvider.GetChildNodes(Sit eMapNode node) at
System.Web.SiteMapNode.get_ChildNodes() at
System.Web.UI.WebControls.SiteMapDataSource.GetNod es() at
System.Web.UI.WebControls.SiteMapDataSource.GetPat hNodeCollection(String
viewPath) at System.Web.UI.WebControls.SiteMapDataSource.GetVie w(String
viewName) at
System.Web.UI.WebControls.SiteMapDataSource.System .Web.UI.IDataSource.GetView(String
viewName) at
System.Web.UI.WebControls.Repeater.ConnectToDataSo urceView() at
System.Web.UI.WebControls.Repeater.OnLoad(EventArg s e) at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at
System.Web.UI.Page.ProcessRequest(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at
System.Web.UI.Page.ProcessRequest() at
System.Web.UI.Page.ProcessRequestWithNoAssert(Http Context context) at
System.Web.UI.Page.ProcessRequest(HttpContext context) at
ASP.default_aspx.ProcessRequest(HttpContext context) at
System.Web.HttpApplication.CallHandlerExecutionSte p.System.Web.HttpApplication.IExecutionStep.Execut e()
at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean&
completedSynchronously)

Sep 28 '06 #1
5 2134
I also get this error quite a lot:
****** IMAGE FETCH ERROR ******
Error Caught in Application_Error event\n
Error in: http://bwbfc.co.uk/bb/imagefetch.ash...&imageid=118\n
Error Message:Object reference not set to an instance of an object.\n\n

REMOTE_ADDR: 198.36.87.81\n
HTTP_ACCEPT_LANGUAGE: en-gb\n
HTTP_REFERER:
http://bwbfc.co.uk/bb/Photoalbum_con...x?Albumid=10\n
HTTP_USER_AGENT: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;
..NET CLR 1.1.4322)\n
HTTP_COOKIE: \n\n\n

Stack Trace: at ImageFetch.writeSingleImage(Int32 ImageID, Int32 size,
Stream output) at ImageFetch.ProcessRequest(HttpContext context) at
System.Web.HttpApplication.CallHandlerExecutionSte p.System.Web.HttpApplication.IExecutionStep.Execut e()
at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean&
completedSynchronously

Sep 28 '06 #2
Here's a simple walkthrough for debugging basics :
http://msdn2.microsoft.com/en-us/library/z9e7w6cs.aspx

For deeper understanding, you'd do well to familiarize yourself with this material :
http://msdn.microsoft.com/library/de..._framework.asp


Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
===================================
"Carl Gilbert" <mr*************@hotmail.comwrote in message
news:11*********************@b28g2000cwb.googlegro ups.com...
Hi

I have implemented the ASP.NET Club Site Starter Kit on my 1&1 web
space.
I have recently been getting some errors where the page doesn't load
and just comes up blank. I have put a handler on Application_Error in
global.asax to email me whenever an error occurs. Sometimes I get upto
100 in an hour which is rather concerning.

I have looked at the error message returned but I can't seem to work
out what's causing the error.

How can I debug the application to track down the error? I have quite
a bit of experience with VB.NET so I understand the concept of break
points and stack traces but it all seems a bit scary when it's on the
web.

I have included the code I have in my global.asax and the error message
I get at the bottom of this post. Should I try running the app on
local host or is there some sort of component or change I can make
somewhere to track down the error online?

Note: I didn't write the error notification code. Theres a line which
logs to an event log. Would it help if I un-comment this and see what
that does?

Regards, Carl Gilbert

****** EVENT HANDLER ******

Protected Sub Application_Error(ByVal sender As Object, ByVal e As
System.EventArgs)
Dim objErr As Exception = Server.GetLastError.GetBaseException
Dim strMsg As String = "Error Caught in Application_Error
event\n" + _
"<br>Error in: <a href='" + Request.Url.ToString() + "'>" +
Request.Url.ToString() + "</a>" + _
"\n<br>Error Message:" + objErr.Message.ToString() + _
"\n\n<br><br>REMOTE_ADDR: " +
Request.ServerVariables("REMOTE_ADDR") + "</a>" + _
"\n<br>HTTP_ACCEPT_LANGUAGE: " +
Request.ServerVariables("HTTP_ACCEPT_LANGUAGE") + _
"\n<br>HTTP_REFERER: " +
Request.ServerVariables("HTTP_REFERER") + _
"\n<br>HTTP_USER_AGENT: " +
Request.ServerVariables("HTTP_USER_AGENT") + _
"\n<br>HTTP_COOKIE: " +
Request.ServerVariables("HTTP_COOKIE") + "\n\n\n<br><br>Stack Trace:" +
objErr.StackTrace.ToString
'EventLog.WriteEntry("Sample_WebApp",err,EventLogE ntryType.Error);
Server.ClearError()
Dim strSbj As String = "BWBFC Application Error"
ClubSiteMailer.Mailer.Send(strMsg, strSbj)

End Sub

****** ERROR MESSAGE ******

Error Caught in Application_Error event\n
Error in: http://bwbfc.co.uk/bb/default.aspx\n
Error Message:Request for the permission of type
'System.Security.Permissions.FileIOPermission, mscorlib,
Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
failed.\n\n

REMOTE_ADDR: 217.37.196.9\n
HTTP_ACCEPT_LANGUAGE: en-gb\n
HTTP_REFERER: \n
HTTP_USER_AGENT: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;
SV1; .NET CLR 1.1.4322; InfoPath.1; .NET CLR 2.0.50727; WinFX RunTime
3.0.50727)\n
HTTP_COOKIE: \n\n\n

Stack Trace: at System.Security.CodeAccessSecurityEngine.Check(Obj ect
demand, StackCrawlMark& stackMark, Boolean isPermSet) at
System.Security.CodeAccessPermission.Demand() at
System.IO.Path.GetFullPath(String path) at
System.Web.Util.FileUtil.IsSuspiciousPhysicalPath( String physicalPath,
Boolean& pathTooLong) at
System.Web.Util.FileUtil.IsSuspiciousPhysicalPath( String physicalPath)
at System.Web.CachedPathData.GetConfigPathData(String configPath) at
System.Web.CachedPathData.GetConfigPathData(String configPath) at
System.Web.CachedPathData.GetConfigPathData(String configPath) at
System.Web.CachedPathData.GetVirtualPathData(Virtu alPath virtualPath,
Boolean permitPathsOutsideApp) at
System.Web.HttpContext.GetPathData(VirtualPath path) at
System.Web.Security.UrlAuthorizationModule.IsUserA llowedToPath(HttpContext
context, VirtualPath virtualPath) at
System.Web.UI.Util.IsUserAllowedToPath(HttpContext context, VirtualPath
virtualPath) at
System.Web.SiteMapProvider.IsAccessibleToUser(Http Context context,
SiteMapNode node) at
System.Web.SiteMapNode.IsAccessibleToUser(HttpCont ext context) at
System.Web.StaticSiteMapProvider.GetChildNodes(Sit eMapNode node) at
System.Web.SiteMapNode.get_ChildNodes() at
System.Web.UI.WebControls.SiteMapDataSource.GetNod es() at
System.Web.UI.WebControls.SiteMapDataSource.GetPat hNodeCollection(String
viewPath) at System.Web.UI.WebControls.SiteMapDataSource.GetVie w(String
viewName) at
System.Web.UI.WebControls.SiteMapDataSource.System .Web.UI.IDataSource.GetView(String
viewName) at
System.Web.UI.WebControls.Repeater.ConnectToDataSo urceView() at
System.Web.UI.WebControls.Repeater.OnLoad(EventArg s e) at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at
System.Web.UI.Page.ProcessRequest(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at
System.Web.UI.Page.ProcessRequest() at
System.Web.UI.Page.ProcessRequestWithNoAssert(Http Context context) at
System.Web.UI.Page.ProcessRequest(HttpContext context) at
ASP.default_aspx.ProcessRequest(HttpContext context) at
System.Web.HttpApplication.CallHandlerExecutionSte p.System.Web.HttpApplication.IExecutionStep.Execut e()
at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean&
completedSynchronously)

Sep 28 '06 #3
Is there anyway to debug an application online?
I've put output logic in the global.asax but this isn't giving me enough
information. Plus, as I'm using shared hosting I have virtually no access
to the server to perform any monitoring.

Carl

"Juan T. Llibre" <no***********@nowhere.comwrote in message
news:eG**************@TK2MSFTNGP04.phx.gbl...
Here's a simple walkthrough for debugging basics :
http://msdn2.microsoft.com/en-us/library/z9e7w6cs.aspx

For deeper understanding, you'd do well to familiarize yourself with this
material :
http://msdn.microsoft.com/library/de..._framework.asp


Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
===================================
"Carl Gilbert" <mr*************@hotmail.comwrote in message
news:11*********************@b28g2000cwb.googlegro ups.com...
>Hi

I have implemented the ASP.NET Club Site Starter Kit on my 1&1 web
space.
I have recently been getting some errors where the page doesn't load
and just comes up blank. I have put a handler on Application_Error in
global.asax to email me whenever an error occurs. Sometimes I get upto
100 in an hour which is rather concerning.

I have looked at the error message returned but I can't seem to work
out what's causing the error.

How can I debug the application to track down the error? I have quite
a bit of experience with VB.NET so I understand the concept of break
points and stack traces but it all seems a bit scary when it's on the
web.

I have included the code I have in my global.asax and the error message
I get at the bottom of this post. Should I try running the app on
local host or is there some sort of component or change I can make
somewhere to track down the error online?

Note: I didn't write the error notification code. Theres a line which
logs to an event log. Would it help if I un-comment this and see what
that does?

Regards, Carl Gilbert

****** EVENT HANDLER ******

Protected Sub Application_Error(ByVal sender As Object, ByVal e As
System.EventArgs)
Dim objErr As Exception = Server.GetLastError.GetBaseException
Dim strMsg As String = "Error Caught in Application_Error
event\n" + _
"<br>Error in: <a href='" + Request.Url.ToString() + "'>" +
Request.Url.ToString() + "</a>" + _
"\n<br>Error Message:" + objErr.Message.ToString() + _
"\n\n<br><br>REMOTE_ADDR: " +
Request.ServerVariables("REMOTE_ADDR") + "</a>" + _
"\n<br>HTTP_ACCEPT_LANGUAGE: " +
Request.ServerVariables("HTTP_ACCEPT_LANGUAGE") + _
"\n<br>HTTP_REFERER: " +
Request.ServerVariables("HTTP_REFERER") + _
"\n<br>HTTP_USER_AGENT: " +
Request.ServerVariables("HTTP_USER_AGENT") + _
"\n<br>HTTP_COOKIE: " +
Request.ServerVariables("HTTP_COOKIE") + "\n\n\n<br><br>Stack Trace:" +
objErr.StackTrace.ToString
'EventLog.WriteEntry("Sample_WebApp",err,EventLog EntryType.Error);
Server.ClearError()
Dim strSbj As String = "BWBFC Application Error"
ClubSiteMailer.Mailer.Send(strMsg, strSbj)

End Sub

****** ERROR MESSAGE ******

Error Caught in Application_Error event\n
Error in: http://bwbfc.co.uk/bb/default.aspx\n
Error Message:Request for the permission of type
'System.Security.Permissions.FileIOPermission, mscorlib,
Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
failed.\n\n

REMOTE_ADDR: 217.37.196.9\n
HTTP_ACCEPT_LANGUAGE: en-gb\n
HTTP_REFERER: \n
HTTP_USER_AGENT: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;
SV1; .NET CLR 1.1.4322; InfoPath.1; .NET CLR 2.0.50727; WinFX RunTime
3.0.50727)\n
HTTP_COOKIE: \n\n\n

Stack Trace: at System.Security.CodeAccessSecurityEngine.Check(Obj ect
demand, StackCrawlMark& stackMark, Boolean isPermSet) at
System.Security.CodeAccessPermission.Demand() at
System.IO.Path.GetFullPath(String path) at
System.Web.Util.FileUtil.IsSuspiciousPhysicalPath (String physicalPath,
Boolean& pathTooLong) at
System.Web.Util.FileUtil.IsSuspiciousPhysicalPath (String physicalPath)
at System.Web.CachedPathData.GetConfigPathData(String configPath) at
System.Web.CachedPathData.GetConfigPathData(Strin g configPath) at
System.Web.CachedPathData.GetConfigPathData(Strin g configPath) at
System.Web.CachedPathData.GetVirtualPathData(Virt ualPath virtualPath,
Boolean permitPathsOutsideApp) at
System.Web.HttpContext.GetPathData(VirtualPath path) at
System.Web.Security.UrlAuthorizationModule.IsUser AllowedToPath(HttpContext
context, VirtualPath virtualPath) at
System.Web.UI.Util.IsUserAllowedToPath(HttpContex t context, VirtualPath
virtualPath) at
System.Web.SiteMapProvider.IsAccessibleToUser(Htt pContext context,
SiteMapNode node) at
System.Web.SiteMapNode.IsAccessibleToUser(HttpCon text context) at
System.Web.StaticSiteMapProvider.GetChildNodes(Si teMapNode node) at
System.Web.SiteMapNode.get_ChildNodes() at
System.Web.UI.WebControls.SiteMapDataSource.GetNo des() at
System.Web.UI.WebControls.SiteMapDataSource.GetPa thNodeCollection(String
viewPath) at System.Web.UI.WebControls.SiteMapDataSource.GetVie w(String
viewName) at
System.Web.UI.WebControls.SiteMapDataSource.Syste m.Web.UI.IDataSource.GetView(String
viewName) at
System.Web.UI.WebControls.Repeater.ConnectToDataS ourceView() at
System.Web.UI.WebControls.Repeater.OnLoad(EventAr gs e) at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at
System.Web.UI.Page.ProcessRequest(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at
System.Web.UI.Page.ProcessRequest() at
System.Web.UI.Page.ProcessRequestWithNoAssert(Htt pContext context) at
System.Web.UI.Page.ProcessRequest(HttpContext context) at
ASP.default_aspx.ProcessRequest(HttpContext context) at
System.Web.HttpApplication.CallHandlerExecutionSt ep.System.Web.HttpApplication.IExecutionStep.Execu te()
at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean&
completedSynchronously)


Sep 29 '06 #4
re:
Is there anyway to debug an application online?
You mean remote debugging.

Yes, but it involves manipulating the server
( installing Visual Studio server-side components on it )

See :
http://msdn2.microsoft.com/en-us/library/cx6214f0.aspx

The problem for you, of course, is that since you're on shared hosting,
it's highly unlikely that your hoster will agree to installing anything on the server.

Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
===================================
"Carl Gilbert" <mr*************@hotmail.comwrote in message
news:ei**************@TK2MSFTNGP04.phx.gbl...
Is there anyway to debug an application online?
I've put output logic in the global.asax but this isn't giving me enough information. Plus, as
I'm using shared hosting I have virtually no access to the server to perform any monitoring.

Carl

"Juan T. Llibre" <no***********@nowhere.comwrote in message
news:eG**************@TK2MSFTNGP04.phx.gbl...
>Here's a simple walkthrough for debugging basics :
http://msdn2.microsoft.com/en-us/library/z9e7w6cs.aspx

For deeper understanding, you'd do well to familiarize yourself with this material :
http://msdn.microsoft.com/library/de..._framework.asp


Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
===================================
"Carl Gilbert" <mr*************@hotmail.comwrote in message
news:11*********************@b28g2000cwb.googlegr oups.com...
>>Hi

I have implemented the ASP.NET Club Site Starter Kit on my 1&1 web
space.
I have recently been getting some errors where the page doesn't load
and just comes up blank. I have put a handler on Application_Error in
global.asax to email me whenever an error occurs. Sometimes I get upto
100 in an hour which is rather concerning.

I have looked at the error message returned but I can't seem to work
out what's causing the error.

How can I debug the application to track down the error? I have quite
a bit of experience with VB.NET so I understand the concept of break
points and stack traces but it all seems a bit scary when it's on the
web.

I have included the code I have in my global.asax and the error message
I get at the bottom of this post. Should I try running the app on
local host or is there some sort of component or change I can make
somewhere to track down the error online?

Note: I didn't write the error notification code. Theres a line which
logs to an event log. Would it help if I un-comment this and see what
that does?

Regards, Carl Gilbert

****** EVENT HANDLER ******

Protected Sub Application_Error(ByVal sender As Object, ByVal e As
System.EventArgs)
Dim objErr As Exception = Server.GetLastError.GetBaseException
Dim strMsg As String = "Error Caught in Application_Error
event\n" + _
"<br>Error in: <a href='" + Request.Url.ToString() + "'>" +
Request.Url.ToString() + "</a>" + _
"\n<br>Error Message:" + objErr.Message.ToString() + _
"\n\n<br><br>REMOTE_ADDR: " +
Request.ServerVariables("REMOTE_ADDR") + "</a>" + _
"\n<br>HTTP_ACCEPT_LANGUAGE: " +
Request.ServerVariables("HTTP_ACCEPT_LANGUAGE" ) + _
"\n<br>HTTP_REFERER: " +
Request.ServerVariables("HTTP_REFERER") + _
"\n<br>HTTP_USER_AGENT: " +
Request.ServerVariables("HTTP_USER_AGENT") + _
"\n<br>HTTP_COOKIE: " +
Request.ServerVariables("HTTP_COOKIE") + "\n\n\n<br><br>Stack Trace:" +
objErr.StackTrace.ToString
'EventLog.WriteEntry("Sample_WebApp",err,EventLo gEntryType.Error);
Server.ClearError()
Dim strSbj As String = "BWBFC Application Error"
ClubSiteMailer.Mailer.Send(strMsg, strSbj)

End Sub

****** ERROR MESSAGE ******

Error Caught in Application_Error event\n
Error in: http://bwbfc.co.uk/bb/default.aspx\n
Error Message:Request for the permission of type
'System.Security.Permissions.FileIOPermission, mscorlib,
Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
failed.\n\n

REMOTE_ADDR: 217.37.196.9\n
HTTP_ACCEPT_LANGUAGE: en-gb\n
HTTP_REFERER: \n
HTTP_USER_AGENT: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;
SV1; .NET CLR 1.1.4322; InfoPath.1; .NET CLR 2.0.50727; WinFX RunTime
3.0.50727)\n
HTTP_COOKIE: \n\n\n

Stack Trace: at System.Security.CodeAccessSecurityEngine.Check(Obj ect
demand, StackCrawlMark& stackMark, Boolean isPermSet) at
System.Security.CodeAccessPermission.Demand() at
System.IO.Path.GetFullPath(String path) at
System.Web.Util.FileUtil.IsSuspiciousPhysicalPat h(String physicalPath,
Boolean& pathTooLong) at
System.Web.Util.FileUtil.IsSuspiciousPhysicalPat h(String physicalPath)
at System.Web.CachedPathData.GetConfigPathData(String configPath) at
System.Web.CachedPathData.GetConfigPathData(Stri ng configPath) at
System.Web.CachedPathData.GetConfigPathData(Stri ng configPath) at
System.Web.CachedPathData.GetVirtualPathData(Vir tualPath virtualPath,
Boolean permitPathsOutsideApp) at
System.Web.HttpContext.GetPathData(VirtualPath path) at
System.Web.Security.UrlAuthorizationModule.IsUse rAllowedToPath(HttpContext
context, VirtualPath virtualPath) at
System.Web.UI.Util.IsUserAllowedToPath(HttpConte xt context, VirtualPath
virtualPath) at
System.Web.SiteMapProvider.IsAccessibleToUser(Ht tpContext context,
SiteMapNode node) at
System.Web.SiteMapNode.IsAccessibleToUser(HttpCo ntext context) at
System.Web.StaticSiteMapProvider.GetChildNodes(S iteMapNode node) at
System.Web.SiteMapNode.get_ChildNodes() at
System.Web.UI.WebControls.SiteMapDataSource.GetN odes() at
System.Web.UI.WebControls.SiteMapDataSource.GetP athNodeCollection(String
viewPath) at System.Web.UI.WebControls.SiteMapDataSource.GetVie w(String
viewName) at
System.Web.UI.WebControls.SiteMapDataSource.Syst em.Web.UI.IDataSource.GetView(String
viewName) at
System.Web.UI.WebControls.Repeater.ConnectToData SourceView() at
System.Web.UI.WebControls.Repeater.OnLoad(EventA rgs e) at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at
System.Web.UI.Page.ProcessRequest(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at
System.Web.UI.Page.ProcessRequest() at
System.Web.UI.Page.ProcessRequestWithNoAssert(Ht tpContext context) at
System.Web.UI.Page.ProcessRequest(HttpContext context) at
ASP.default_aspx.ProcessRequest(HttpContext context) at
System.Web.HttpApplication.CallHandlerExecutionS tep.System.Web.HttpApplication.IExecutionStep.Exec ute()
at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean&
completedSynchronously)



Sep 29 '06 #5
I should have added that local debugging usually is just as good
as remote debugging, so give it a try on your development machine.

Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
===================================
"Juan T. Llibre" <no***********@nowhere.comwrote in message
news:%2****************@TK2MSFTNGP06.phx.gbl...
re:
>Is there anyway to debug an application online?

You mean remote debugging.

Yes, but it involves manipulating the server
( installing Visual Studio server-side components on it )

See :
http://msdn2.microsoft.com/en-us/library/cx6214f0.aspx

The problem for you, of course, is that since you're on shared hosting,
it's highly unlikely that your hoster will agree to installing anything on the server.

Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
===================================
"Carl Gilbert" <mr*************@hotmail.comwrote in message
news:ei**************@TK2MSFTNGP04.phx.gbl...
>Is there anyway to debug an application online?
I've put output logic in the global.asax but this isn't giving me enough information. Plus, as
I'm using shared hosting I have virtually no access to the server to perform any monitoring.

Carl

"Juan T. Llibre" <no***********@nowhere.comwrote in message
news:eG**************@TK2MSFTNGP04.phx.gbl...
>>Here's a simple walkthrough for debugging basics :
http://msdn2.microsoft.com/en-us/library/z9e7w6cs.aspx

For deeper understanding, you'd do well to familiarize yourself with this material :
http://msdn.microsoft.com/library/de..._framework.asp


Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
===================================
"Carl Gilbert" <mr*************@hotmail.comwrote in message
news:11*********************@b28g2000cwb.googleg roups.com...
Hi

I have implemented the ASP.NET Club Site Starter Kit on my 1&1 web
space.
I have recently been getting some errors where the page doesn't load
and just comes up blank. I have put a handler on Application_Error in
global.asax to email me whenever an error occurs. Sometimes I get upto
100 in an hour which is rather concerning.

I have looked at the error message returned but I can't seem to work
out what's causing the error.

How can I debug the application to track down the error? I have quite
a bit of experience with VB.NET so I understand the concept of break
points and stack traces but it all seems a bit scary when it's on the
web.

I have included the code I have in my global.asax and the error message
I get at the bottom of this post. Should I try running the app on
local host or is there some sort of component or change I can make
somewhere to track down the error online?

Note: I didn't write the error notification code. Theres a line which
logs to an event log. Would it help if I un-comment this and see what
that does?

Regards, Carl Gilbert

****** EVENT HANDLER ******

Protected Sub Application_Error(ByVal sender As Object, ByVal e As
System.EventArgs)
Dim objErr As Exception = Server.GetLastError.GetBaseException
Dim strMsg As String = "Error Caught in Application_Error
event\n" + _
"<br>Error in: <a href='" + Request.Url.ToString() + "'>" +
Request.Url.ToString() + "</a>" + _
"\n<br>Error Message:" + objErr.Message.ToString() + _
"\n\n<br><br>REMOTE_ADDR: " +
Request.ServerVariables("REMOTE_ADDR") + "</a>" + _
"\n<br>HTTP_ACCEPT_LANGUAGE: " +
Request.ServerVariables("HTTP_ACCEPT_LANGUAGE ") + _
"\n<br>HTTP_REFERER: " +
Request.ServerVariables("HTTP_REFERER") + _
"\n<br>HTTP_USER_AGENT: " +
Request.ServerVariables("HTTP_USER_AGENT") + _
"\n<br>HTTP_COOKIE: " +
Request.ServerVariables("HTTP_COOKIE") + "\n\n\n<br><br>Stack Trace:" +
objErr.StackTrace.ToString
'EventLog.WriteEntry("Sample_WebApp",err,EventL ogEntryType.Error);
Server.ClearError()
Dim strSbj As String = "BWBFC Application Error"
ClubSiteMailer.Mailer.Send(strMsg, strSbj)

End Sub

****** ERROR MESSAGE ******

Error Caught in Application_Error event\n
Error in: http://bwbfc.co.uk/bb/default.aspx\n
Error Message:Request for the permission of type
'System.Security.Permissions.FileIOPermission , mscorlib,
Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
failed.\n\n

REMOTE_ADDR: 217.37.196.9\n
HTTP_ACCEPT_LANGUAGE: en-gb\n
HTTP_REFERER: \n
HTTP_USER_AGENT: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;
SV1; .NET CLR 1.1.4322; InfoPath.1; .NET CLR 2.0.50727; WinFX RunTime
3.0.50727)\n
HTTP_COOKIE: \n\n\n

Stack Trace: at System.Security.CodeAccessSecurityEngine.Check(Obj ect
demand, StackCrawlMark& stackMark, Boolean isPermSet) at
System.Security.CodeAccessPermission.Demand() at
System.IO.Path.GetFullPath(String path) at
System.Web.Util.FileUtil.IsSuspiciousPhysicalPa th(String physicalPath,
Boolean& pathTooLong) at
System.Web.Util.FileUtil.IsSuspiciousPhysicalPa th(String physicalPath)
at System.Web.CachedPathData.GetConfigPathData(String configPath) at
System.Web.CachedPathData.GetConfigPathData(Str ing configPath) at
System.Web.CachedPathData.GetConfigPathData(Str ing configPath) at
System.Web.CachedPathData.GetVirtualPathData(Vi rtualPath virtualPath,
Boolean permitPathsOutsideApp) at
System.Web.HttpContext.GetPathData(VirtualPat h path) at
System.Web.Security.UrlAuthorizationModule.IsUs erAllowedToPath(HttpContext
context, VirtualPath virtualPath) at
System.Web.UI.Util.IsUserAllowedToPath(HttpCont ext context, VirtualPath
virtualPath) at
System.Web.SiteMapProvider.IsAccessibleToUser(H ttpContext context,
SiteMapNode node) at
System.Web.SiteMapNode.IsAccessibleToUser(HttpC ontext context) at
System.Web.StaticSiteMapProvider.GetChildNodes( SiteMapNode node) at
System.Web.SiteMapNode.get_ChildNodes() at
System.Web.UI.WebControls.SiteMapDataSource.Get Nodes() at
System.Web.UI.WebControls.SiteMapDataSource.Get PathNodeCollection(String
viewPath) at System.Web.UI.WebControls.SiteMapDataSource.GetVie w(String
viewName) at
System.Web.UI.WebControls.SiteMapDataSource.Sys tem.Web.UI.IDataSource.GetView(String
viewName) at
System.Web.UI.WebControls.Repeater.ConnectToDat aSourceView() at
System.Web.UI.WebControls.Repeater.OnLoad(Event Args e) at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Control.LoadRecursive() at
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at
System.Web.UI.Page.ProcessRequest(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at
System.Web.UI.Page.ProcessRequest() at
System.Web.UI.Page.ProcessRequestWithNoAssert(H ttpContext context) at
System.Web.UI.Page.ProcessRequest(HttpContext context) at
ASP.default_aspx.ProcessRequest(HttpContext context) at
System.Web.HttpApplication.CallHandlerExecution Step.System.Web.HttpApplication.IExecutionStep.Exe cute()
at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean&
completedSynchronously)



Sep 29 '06 #6
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