Customerror page in asp.net webapplication

Question

I am developping an Asp.NET web application with visual studio 2015 and running it under IIS Express. I want to add a custom error page to it.

First, in the web.config file, I added customErrors markup under the system.web section. But it didn't seem to have any effect.

<customErrors mode="On" defaultRedirect="/Error.aspx">
   <error statusCode="404" redirect="/Error.aspx" />
</customErrors>

So I added an httpErrors markup under system.webServer. And it showed me a blank page.

<httpErrors existingResponse="PassThrough" />

So I changed the above httpErrors markup by this one :

<httpErrors errorMode="Custom" existingResponse="Auto" defaultResponseMode="ExecuteURL" defaultPath="/Error.aspx">
  <clear/>
  <error path="/Error.aspx" responseMode="ExecuteURL" statusCode="404"/>
</httpErrors>

And it showed me the "lock violation" error. I Tried to remove ,defaultPath in the applicationHost.config file, rebooted the computer, but the same error appears

Even in Global.asax, the Application_Error is not fired in the case of some error like 404.

Does someone have any clue ?

Edit : I tried to do the same thing in a new solution : So I created a new web application - Blank webforms template. Same result. But when I created a new web application - Blank MVC solution, it worked.

Is there any difference in the config between webforms and mvc? Is someone else have the same issue whith the webforms template ?

I am using IIS Express. So I'm not doing any server configuration — ihebiheb
– ihebiheb, Commented Aug 15, 2016 at 16:21

pravs · Accepted Answer · 2016-08-15 18:44:48Z

0

I was able to redirect to error page. I tried this in my current MVC project. Below is excerpt of what i did

Used existing error page in my solution under Views/Shared/Error.cshtml
Used your custom errors parameters

<customErrors mode="On" defaultRedirect="~/Views/Shared/Error.cshtml"> <error statusCode="404" redirect="~/Views/Shared/Error.cshtml" /> </customErrors>

Threw 404 purposefully in my Index.cshtml

@Response.StatusCode=404 @Response.End()

Hint: Please try to see the path and how you are testing 404 error

answered Aug 15, 2016 at 18:44

pravs

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1 Comment

ihebiheb Over a year ago

I have my error page named Error.aspx under the root of the server so i set defaultRedirect="/Error.aspx" (also tried defaultRedirect="~/Error.aspx") and to test the 404 i just write in the address bar a URL pointing to a non existing page

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