Can programmically add new group w/ group header

[Dustin]

I'm trying to programically at runtime add a new group works, but when i try to add a header row the report returns and error. Is there something wrong i'm doing in the code in the attached picture?

 

This is the error i get...

Internal Server Error
Telerik.Reporting.Services.Engine.DocumentRenderException: Object reference not set to an instance of an object. at Telerik.Reporting.Services.Engine.Document.GetDocumentInfo() at Telerik.Reporting.Services.Engine.ReportEngine.GetDocumentInfo(String clientID, String instanceID, String documentID) at Telerik.Reporting.Services.WebApi.ReportsControllerBase.GetDocumentInfo(String clientID, String instanceID, String documentID) in c:\temp\reporting\RBuild-6690\Reporting_Build\Source\Code\Telerik.Reporting.Services.WebApi\ReportsControllerBase.cs:line 287 at lambda_method(Closure , Object , Object[] ) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.b__9(Object instance, Object[] methodParameters) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at System.Web.Http.Tracing.ITraceWriterExtensions.d__18`1.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at System.Web.Http.Controllers.ApiControllerActionInvoker.d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at System.Web.Http.Tracing.ITraceWriterExtensions.d__18`1.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at System.Web.Http.Filters.ActionFilterAttribute.d__5.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Web.Http.Filters.ActionFilterAttribute.d__5.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at System.Web.Http.Filters.ActionFilterAttribute.d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at System.Web.Http.Controllers.ActionFilterResult.d__2.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at System.Web.Http.Controllers.ExceptionFilterResult.d__0.MoveNext()

 

[Dustin]

The subject for this thread should actually be...

Can't programmically add new group w/ group header

[Nasko]

Hello Dustin,

The stack trace points to an exception (NullReference) while processing/rendering the report.
However, it is not apparent which part of the code causes the exception.
Our suggestion in this scenario is to create the whole report in the Visual Studio Report Designer first. After you are done with the desired report layout and definition during design-time you need to open the .Designer.cs file and reuse the automatically generated code there for your empty Report object. The automatically generated code in the .Designer.cs should run without any errors and can serve as a template for your dynamic report.

Regards,
Nasko
Telerik