命名空间“Microsoft”中不存在类型或命名空间名称“Reporting”

Question

I simply get the following error:

The type or namespace name 'Reporting' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)

after adding this to my code:

protected global::Microsoft.Reporting.WebForms.ReportViewer ReportViewer1;

I've seen some solutions saying I must add some assemblies. but none of them worked. here is an example:

<add assembly="Microsoft.ReportViewer.Common, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>

can anyone help me with this?

Answer 1

In my case I needed to actually install Microsoft Report Viewer on the troublesome machine.

• Report Viewer 2010 (version=10)
• Report Viewer 2012 (version=11)
• Report Viewer 2015

Of course, other ones are available, it can be worked out which from the Version= on the dll which one is needed. In my case I needed version 11 (the 2012 one).

Answer 2

I did it by right-clicking on References folder in my project and then selecting Add Reference . and then adding Assemblies > Extensions > Microsoft.ReportViewer to the references.

Answer 3

All these installs didn't work for me at all. What worked for me inside Visual Studio 2015 is installing the following two packages (I only needed these two) from NuGet (menu Project > Manage NuGet Packages):

• Microsoft.ReportViewer.Common.VS2010
• Microsoft.ReportViewer.WinForms.VS2010

The references were added to current project automatically.

Answer 4

从Nuget Package Manager安装ReportViewer

Answer 5

Just install SSDT . Then you need to remove the broken reference and re-add it from Assemblies > Extensions.

Answer 6

从以下位置导入：C：\\ Program Files（x86）\\ Microsoft Visual Studio 11.0 \\ ReportViewer \\ Microsoft.ReportViewer.WebForms.dll

Answer 7

I received this error when attempting to install a newer version of the SQL Server Reporting Services Report Viewer Control than the current target version of .NET.

Installing an earlier version of the nuget resolved this eg instead of version 15, installing version 14 worked

Microsoft.ReportingServices.ReportViewerControl.WebForms nuget