Could not load file or assembly 'Microsoft.ReportViewer.Common, Version=11.0.0.0

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...

Could not load file or assembly 'Microsoft.ReportViewer.Webforms' or

Could not load file or assembly 'Microsoft.ReportViewer.Common'

This issue occured for me in Visual studio 2015.

Reason:

the reference for Microsoft.ReportViewer.Webforms dll is missing.

Possible Fix

Step1:

To add "Microsoft.ReportViewer.Webforms.dll" to the solution.

Navigate to Nuget Package Manager Console as

"Tools-->NugetPackageManager-->Package Manager Console".

Then enter the following command in console as below

PM>Install-Package Microsoft.ReportViewer.Runtime.WebForms

Then it will install the Reportviewer.webforms dll in "..\packages\Microsoft.ReportViewer.Runtime.WebForms.12.0.2402.15\lib" (Your project folder path)

and ReportViewer.Runtime.Common dll in "..\packages\Microsoft.ReportViewer.Runtime.Common.12.0.2402.15\lib". (Your project folder path)

Step2:-

Remove the existing reference of "Microsoft.ReportViewer.WebForms". we need to refer these dll files in our Solution as "Right click Solution >References-->Add reference-->browse ". Add both the dll files from the above paths.

Step3:

Change the web.Config File to point out to Visual Studio 2015. comment out both the Microsoft.ReportViewer.WebForms and Microsoft.ReportViewer.Common version 11.0.0.0 and Uncomment both the Microsoft.ReportViewer.WebForms and Microsoft.ReportViewer.Common Version=12.0.0.0. as attached in screenshot.

Microsoft.ReportViewer.Webforms/Microsoft.ReportViewer.Common

Also refer the link below.

Could not load file or assembly 'Microsoft.ReportViewer.WebForms'

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.

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.