Unable to view reports in Visual Studio

[Robert]

We inherited a project from another company; they use Telerik for reporting. The project has several report files in it; but I am unable to view or modify them in Visual Studio. I have the appropriate Telerik dlls referenced, but I never actually installed anything from Telerik. Do I need to actually install something to view Telerik reports in design time?

I'm using Visual Studio 2010 Premium; the error I'm getting is:

To prevent possible data loss before loading the designer, the following errors must be resolved: 

Value cannot be null. Parameter name: instance 

[Steve]

Hello Robert,

Yes, you would need to install Telerik Reporting on your dev machine if you would like to use the provided Report Designer to modify or create reports. The assemblies responsible for the Visual Studio design support are Telerik.Reporting.Design and Telerik.Reporting.Design.Components and they are added to GAC when you install the product.

Best wishes,
Steve
the Telerik team

[Prasad]

Hi Steve,

I am getting the error like this.

The designer could not be shown for this file because none of the classes within it can be designed.

Instances of this error (1) 1. Hide Call Stack at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.EnsureDocument(IDesignerSerializationManager manager) at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager manager) at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager) at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.DeferredLoadHandler.Microsoft.VisualStudio.TextManager.Interop.IVsTextBufferDataEvents.OnLoadCompleted(Int32 fReload)

This worked nice before the time.

Why am i not able to view this page at design time.


Note: Every thing is fine when i create new solution on the system.

Please help me.


Prasad

[Steve]

Hello Prasad,

The error you're getting is generic and means that some problem prevents the report designer from displaying. Usually such a problem can occur after improper upgrade to a newer version of Telerik Reporting. Please start the Upgrade Wizard from the VS Telerik menu and run it to make sure all references are updated accordingly.

If the problem persists, it would be best if you open a support ticket and attach the problematic project.

Greetings,
Steve
the Telerik team