Could not load file or assembly 'Microsoft.Rep

Question

I recently upgraded my n-tier solution from .NET 3.5 vs 2008 to 4.5 visual studio 2012. Every thing went fine apart from crystal reports and I had to install new runtime crystal reports for visual studio 2012 from the following link http://downloads.businessobjects.com/akdlm/cr4vs2010/CRforVS_13_0_5.exe. After installing the above package I had to resolve some deprecated function and properties of CrystalViewer and after that reports rendering properly in development environment (Windows 7 64 bit, SQL Server 2005, Visual Studio 2012). When I deployed the package in test environment windows server 2008 R2 the Application failed to load by throwing error Could not load file or assembly Microsoft.ReportViewer.WebForms, Version=11

I managed to resolve ReportViewer.WebForms error by copying the DLL from C:\Program Files (x86)\Microsoft Visual Studio 11.0\ReportViewer to bin folder of solution and set property copylocal = true and deployed the package. After that I received the error Could not load file or assembly 'Microsoft.ReportViewer.Common, Version=11.0.0.0 . I tried to search that DLL on my machine but couldn't. when project is running in visual studio, In Debug-> Windows->Module the file is not listed however in global assembly cache that file is installed but I don't know how its installed to global cache and from where . I found one solution that I had to install ReportViewer.msi from microsoft package but if i install this package it asks me to install SQL Server 2012 which I dont wan't. Could any one help me to resolve this issue. Thanks

Answer 1

You can install the Microsoft Report Viewer 2012 Runtime and change your references so they point to the ones installed by the runtime.

http://www.microsoft.com/en-gb/download/details.aspx?id=35747

I have installed the runtime without it asking for SQL Server 2012. Before installing try uninstalling any previous versions of report viewer.

Answer 2

In my case, the 'Microsoft.ReportViewer.Common.dll' assembly is not required for my project, so I simply removed all references (Project -> Add Reference... -> ...) (all requirements from Publish tab the VS2013 removed automatically) and all works properly.

Answer 3

Although rather late, but you can manually download the required DLLs from nuget at the following link: https://www.nuget.org/packages/Microsoft.ReportViewer.Runtime.Common/12.0.2402.15

Open the file .Rar Archive, extract the dlls and copy them manually to the bin folder of your publish.

This solution worked for me. Hope that helps !!

Answer 4

Dont know if this is good to anyone, but search all these dlls:

• Microsoft.ReportViewer.Common.dll
• Microsoft.ReportViewer.ProcessingObjectModel.dll
• Microsoft.ReportViewer.WebForms.dll
• Microsoft.ReportViewer.WinForms.dll
• Microsoft.ReportViewer.DataVisualization.dll

You find them in C:\Windows\assembly\GAC_MSIL\..., and then put them in the references of your project.

For each of them say: local copy, and check for 32 or 64 bit solution.

Answer 5

As Microsoft.ReportViewer.2012.Runtime has Microsoft.ReportViewer.WebForms, Microsoft.ReportViewer.Common and Microsoft.ReportViewer.ProcessingObjectModel libraries, just run this command on PM Console:

Install-Package Microsoft.ReportViewer.2012.Runtime

Note : If you want to completely remove the old Microsoft.ReportViewer.xxx references, you can remove them from Manage NuGet Packages>Installed Packages menu and then remove the related lines from packages.config file in your project. After that it will not comeback again during building of the project.

Hope this helps...

Answer 6

Simply install Microsot.ReportViewer.2012.Runtime nuget package as shown in this answer https://stackoverflow.com/a/33014040/2198830