i am using global.asax to log unexpected errors

error message is Object reference not set to an instance of an object.

but i also want to learn which named object caused this

is this possible

i also keep StackTrace but it does not write there

I dont know if this will help but there is an exception logging library called ELMAH.

It might give you the information you need?

• http://www.hanselman.com/blog/ELMAHAndExceptionDrivenDevelopmentFTW.aspx

rtpHarry:

I dont know if this will help but there is an exception logging library called ELMAH.

It might give you the information you need?

• http://www.hanselman.com/blog/ELMAHAndExceptionDrivenDevelopmentFTW.aspx
  

nope this does not help me

my stack trace

<Message>Object reference not set to an instance of an object.</Message>

  <StackTrace>at ASP.battleresult_aspx.__RenderPanelSelectWhichPokemon(HtmlTextWriter __w, Control parameterContainer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at ASP.masterpage_master.__RenderfrmMasterPage(HtmlTextWriter __w, Control parameterContainer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Page.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)</StackTrace>

Use the built-in ASP.NET Health Monitoring.  It will tell you what's happening in your code.  Out of the box it will send you an email with a stack trace of the error, and all you need to do is configure the web.config file.  I did an article on it earlier in the year.

http://www.dotnetcurry.com/ShowArticle.aspx?ID=283

What's wrong with debugging it and seeing which line caused the problem?

becaue i never be able to catch this error at localhost

but this error happens at host

Do you publish the .pdb files to the host?

Without the .pdb files you don't get line numbers in your stack traces.

Mr^B:

Do you publish the .pdb files to the host?

Without the .pdb files you don't get line numbers in your stack traces.

no i dont publish pdb

only compiled,dll and aspx

You'll have to publish the .pdbs then if you want to get a complete stack trace (with line numbers).

Mr^B:

You'll have to publish the .pdbs then if you want to get a complete stack trace (with line numbers).

can you provide more specific info

i dont even know what is pdbs

You can also build a debug build onto your server and that way you can also get line numbers etc.

Check all your reference are copied on the server. All reference are in web.config assembly section. If your application run on local machine without any problem it is most likely missing reference.

A pdb file is used for debugging, it will be found with the assembly if you are publishing the site yourself.

If you are letting asp.net compile itself (ie uploading the individual aspx/aspx.cs files) then you just have to set debug="true" in your web.config.

the default web.config looks like this

<!-- other parts of web.config here -->
	<system.web>
    <!-- <globalization uiCulture="en-GB" culture="en-GB" /> -->
		<!-- 
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.
        -->
		<compilation debug="true">

<!-- other parts of web.config here -->

ok wi ill try this

i never encounter with error

ofc i would fix error if i could encounter

i publish my web site like this than i upload output to the host via ftp

rtpHarry:

A pdb file is used for debugging, it will be found with the assembly if you are publishing the site yourself.

If you are letting asp.net compile itself (ie uploading the individual aspx/aspx.cs files) then you just have to set debug="true" in your web.config.

the default web.config looks like this

view plaincopy to clipboardprint?

1. <!-- other parts of web.config here -->  
2.     <system.web>  
3.     <!-- <globalization uiCulture="en-GB" culture="en-GB" /> -->  
4.         <!--   
5.             Set compilation debug="true" to insert debugging   
6.             symbols into the compiled page. Because this   
7.             affects performance, set this value to true only   
8.             during development.  
9.         -->  
10.         <compilation debug="true">  
11.   
12. <!-- other parts of web.config here -->  

<!-- other parts of web.config here -->
	<system.web>
    <!-- <globalization uiCulture="en-GB" culture="en-GB" /> -->
		<!-- 
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.
        -->
		<compilation debug="true">

<!-- other parts of web.config here -->

here how my web config is set but i dont see anywhere pdb file as an output

		<!-- 
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.
        -->
		<compilation debug="true">
			<assemblies>
				<add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=xxxxxxx"/>
				<add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=xxxxxxx"/>
				<add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=xxxxxxx"/>
				<add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=xxxxxxx"/>
			</assemblies>
		</compilation>