Parser Error Message: Could not load type 'sometype'

Question

I am experiencing an error that I am unable to resolve for some time now. I was wondering if someone can help identify the cause of this error? I am completely new to asp /

Answer 1

I had this error , just needed to rebuild the project

Answer 2

Rebuilding/re-publishing my project/solution to the server did nothing to help me, and I doubt that will help that many out of this predicament. For me, I did a few things to troubleshoot this that eventually got me out of this "hole".

I had been trying to use a binding on the web site, but this wasn't working. I tried calling the site with http://localhost/Report.aspx (this was my homepage, which I opted to not call Default.aspx - I was going to update the "Default Documents" section with the name later) when I got the Parser Error the OP saw. So I tried some things:

I stopped the old project's website and built another, simple web project, that had "hello" and a label on the page and nothing else. I had a line in the Page_Load to populate the label's Text property with "world!", just to make sure that part was working. I created a new website on port 80 and transferred the published contents of my site to the server. So even though I had .NET 4.5 installed on the server (and had ran the aspnet_regiis -i command from the 4.0 directory) and the App Pool in IIS that I was using for this new project was set to 4.0, the browser complained about the web.config having a targetFramework=4.5.2 in it, which is Visual Studio 2015's default framework. So I installed .NET 4.6 (NDP46-KB3045557-x86-x64-AllOS-ENU.exe), restarted the server, and then my simple site worked. So then I deleted this site - all I wanted to do was prove my installation steps were accurate and the server could run a site.

So then I went back to my original project/site - I deleted and re-created the web site. I put the Application Pool to the one I had originally created for this, which I ensured was running .NET 4.0. Once I did this, I navigated to my site and everything worked when using http://localhost/Report.aspx. So it seems to me what causes this is what version of the .NET Framework you are using.

Answer 3

Please check namespace and class name at all places, In one case, One team member changed namespace and I was using old namespace in .aspx file. It was causing issue. I updated namespace and it got working.

Answer 4

After scouring around for what could have caused this I found a few things that I needed to do to get my project running...

(Note: You may not need to do all of these - it is a case-by-case thing)

• If you did any changes from IIS Express to Local IIS you may need to change the build configuration from bin/debug to bin. (Right click on solution >> Properties >> Build >> Output)

• If you have a URL rewrite then you will need to install URL rewrite on your Local IIS.

• Navigate to your applicationhosts.config file (usually it's some place like C:\Users\username\Documents\IISExpress\config) and rename the file to applicationhostsOLD.config.

• Clean and rebuild your project. You may need to go manually empty out the bin.

Now you should be good to go.

Answer 5

It can't find the necessary file in dll assembly. Rebuild the project, Rebuild the solution and then try it again.

Answer 6

It's likely that you renamed something. Check the Global.asax.cs file for the class declaration and make sure that the namespace and class name match exactly what's in the asax file. This includes case! Can you copy/paste the namespace and class declaration of the .cs file into a post here so that we can compare?