(Microsoft.Reporting.WebForms.ReportViewer) is not compatible with the type of control (Microsoft.Reporting.WebForms.ReportViewer)

Question

User-1979913015 posted

 I am trying to use ReportViewer 9 in Visual Studio 8 but I get this error when I try to run the page:

The base class includes the field 'ReportViewer1', but its type (Microsoft.Reporting.WebForms.ReportViewer) is not compatible with the type of control (Microsoft.Reporting.WebForms.ReportViewer).

Please help if you can!

Thanks

Answer 1

User-1979913015 posted
Please test it with a new clean project if the viewer works with VS2008.  Another stupid question, are you using viewer for WebForms or WinForms – I am sure there are two separate viewers (it is really stupid question but still please check it).<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p><o:p></o:p>If the test above is successful, and if you had previous version in past, your bin folder can have DLLs from both versions.<o:p></o:p>I would suggest trying the following:<o:p></o:p>·         Close the VS solution <o:p></o:p>·         Delete file with extension .suo (it is hidden file so make sure you found one)<o:p></o:p>·         Go to bin folder and delete everything<o:p></o:p>

·         Open solution and rebuild it: clean the solution first (Build\Clean Solution), then rebuild solution (Build/Rebuild Solution).

This solution helped me. I hope it is helpful for someone else.

 

 

Tt

Tt<o:p> </o:p><o:p> </o:p>

Answer 2

User-209725320 posted

Change in your Web.config all "Microsoft.ReportViewer.WebForms, Version=8.0.0.0,..." to " Microsoft.ReportViewer.WebForms, Version=9.0.0.0,..." and in controls "Register Assembly="Microsoft.ReportViewer.WebForms, Version=8.0.0.0,..." to "Register Assembly="Microsoft.ReportViewer.WebForms, Version=9.0.0.0,..."

It should help

 mw

Answer 3

User1864629908 posted

 I tried all of the above as well as removing the bin files and .suo file.  None of these worked.  What did work for me was going to the Solution Explorer -> [Project Name] -> References -> delete the Report viewer reference and readd the correct one.

Answer 4

User154448021 posted

 I tried all of the above as well as removing the bin files and .suo file.  None of these worked.  What did work for me was going to the Solution Explorer -> [Project Name] -> References -> delete the Report viewer reference and readd the correct one.

 

Thanks. That solved my issue.

Answer 5

User232787578 posted

 Solved mine too.  Should have thought of that!  Thanks

Answer 6

User-593575503 posted

Cleaning the solutions works fine for me !

Thanks,

Answer 7

User831742134 posted

Remove the references of Microsoft.Reporting.WebForms,Microsoft.Reporting.Common

and add them once again of the Version which you have used in web.config.

Answer 8

User-922479165 posted

Cleaning the solutions works fine for me as well