Could not load type ... (user control on web form)

[IlseDC]

I have a project (UserControls) with one user control (myControl) and one web form (myForm).
On the web form there is only the user control (myControl).

On my local machine the web form runs fine.

I copied the files to the production machine in the same structure as on my local machine.

I get the following error:

Parser error message: Could not load type 'ZKHNet.UserControls.MyControl'.

line 1:
<%@ Control Language="c#" AutoEventWireup="false" Codebehind="MyControl.ascx.cs" Inherits="ZKHNet.UserControls.MyControl" TargetSchema="

http://schemas.microsoft.com/intellisense/ie5"%>

The file structure on the production server is the same as on my local PC.
C:\inetpub\

http://wwwroot\ZKHNet\UserControls\MyControl.ascx

C:\inetpub\

http://wwwroot\ZKHNet\UserControls\MyForm.aspx

C:\inetpub\

http://wwwroot\ZKHNet\UserControls\Web.config

C:\inetpub\

http://wwwroot\ZKHNet\UserControls\bin\UserControls.dll

In IIS I made an application of "UserControls".

I also made some web services and these are running fine on the production machine.
I did the test with

http://ServerA/ZKHNetServices/myService.asmx.

Does anyone know what is wrong with the user control and the web form?

 

[ca8msm]

Have you added the "Register" tag to the top of your aspx page? Actually, you probably have if it works fine on your local machine but it's worth checking as a starting point.


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[IlseDC]

Yes I have the "Register" tag in the aspx page.

<%@ Register TagPrefix="uc1" TagName="myControl" Src="myControl.ascx" %>

 

[edt82]

IlseDC,

All I can tell u with 95%-98% certainty is that the version of UserControls.dll in the bin directory on the prod machine isn't the latest version, or at least isn't the version that contains the class definition for myControl.

At least the CLR is able to find the DLL, otherwise you'd probably get parser errors in global.asax.

As to reasons why that dll wouldn't contain the class definition, I wouldn't be able to say exactly, except to say that it's usually something obvious that you;ve missed...probably cos u've gone over it hundreds of time and its numbed u out.

For example, in my case, I copied an old web application that was working on some other machine onto a new workstation that has VS.NET. I verified that the old code worked by loading the web forms. I added some new ASCX and ASPX. It compiled all OK. I loaded the web form, but got the same parser error as u. Deleted the DLL in the \bin directory and recompiled. This time got parser error to do with the global.asx. Sure enough, VS.NET was outputing to \bin\debug...not \bin. Changed vs.NET settings and recompiled. Worked

That was pretty long winded, also make sure that your capitalisation is consistent.C# is case sensitive!!

Anyways, my example should highlight that u need to go back to basics and make triple sure that u've got the right settings and version of files.

G'luck.

 

[IlseDC]

Solution:
MyControl used some external DLL's that were not copied to the production server.
So MyControl could not run and could not been loaded.