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Print PDF and Export Excel from RDLC in Asp.Net Core

Zoltan Halasz on December 03, 2020

This blog post is providing some more insight and the source code to a youtube tutorial, that I consider being worthwile looking at more closely. ...

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HolgerKeller • Dec 7 '21

I have a Problem with 2 different report types in one application.
It works only with the report type that I call first.
For the second I got the following exception:

NullReferenceException: Object reference not set to an instance of an object.
AspNetCore.ReportingServices.ReportIntermediateFormat.Paragraph.SetExprHost(TextBoxExprHost textBoxExprHost, ObjectModelImpl reportObjectModel)

ReportProcessingException: An unexpected error occurred in Report Processing.
Object reference not set to an instance of an object.
AspNetCore.ReportingServices.ReportProcessing.Execution.RenderReport.Execute(IRenderingExtension newRenderer)

I would really appreciate any idea.

Thanks

Lazar1389 • Dec 15 '21

Could you manage to solve this? I Have the same problem, I lost months in solving it. THank you

HolgerKeller • Dec 15 '21

I moved to github.com/lkosson/reportviewercore.
It works fine.

Lazar1389 • Dec 15 '21

Thanks for answering. If you have time to help, please send some call of .rdlc report using this "reportviewercore" package.. I am struggling with it. THanks!

Sachin Kulkarni • May 5 '21

We are trying to use microsoft graphs in the rdlc report and getting error below
"Could not load file or assembly 'System.Windows.Forms. version=4.0.0.0. Culture=neutral, PublicKeyToken=b77a5c561934e089i. The system cannot find the file specified. "
Did anyone ran in this issue?

Thanks in Advance.

momen • Feb 25 '21 • Edited

Whast this Error => AspNetCore.Reporting.LocalProcessingException: 'An error occurred during local report processing.;An unexpected error occurred in Report Processing.
Index was outside the bounds of the array.'

FelixJose28 • Mar 28 '22 • Edited

i have the same issue, well i have areound 7 rdlc files, if i run the application and execute any report that work fine, but when i try to execute another report then throw the following error: AspNetCore.Reporting.LocalProcessingException: An error occurred during local report processing.;An unexpected error occurred in Report Processing.
I have lost several days on this, I would appreciate if you help me with this

K|Ξ|ΞBS • Feb 1 '22

So far this worked great for me. The only issue I ran into is I have External Images for one of my reports. I keep getting EnableExternalImages property has not been set for this report. I'm not sure if this is possible in this example.