ReportViewer control parameters reset when Async

Question

ReportViewer control parameters reset when Async

William Buchanan 61

Hi all

Not sure if anyone has seen this problem but seem to be hitting a brick wall...

When we turn on the Async setting for the ReportViewer control what happens is after the report is run some of the parameters lose their selected option, which means that to re-run the report the user needs to go and re-select all the parameters again. Does anyone know how to prevent this?

E.g.

Load report
Select all parameter options
View Report -> All parameters now deselected
User needs to reselect all parameter options if they want to run report again

It is mainly the boolean options which are affected (radio buttons and check boxes) - the combo boxes remember their settings.

The reason we need to turn on Async is because without it the web browser becomes unresponsive when a long report is run so the user has the impression that the site has crashed. With Async on this doesn't happen but the problem with the resetting params is a worse problem as it affects everyone all the time.

We have the latest version of the ReportViewer control. It is running in an MVC application on an asxc page.

Any thoughts appreciated...

Thanks

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Answer 1

Joyzhao-MSFT 15,651

Hi,
I am not sure if it could act as required in MVC project, since for now ReportViewer is only supported for WinForm/WebForm developing.
Sorry that I am not very professional in C# MVC developing. I would suggest you could find help from C# developing forum or other developers forum which could offer more insight for this case.
Regards,
Joy

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William Buchanan 61 Reputation points

2020-09-25T01:39:02.9+00:00

Hi Joy

The advice on the Microsoft Learn page for this control is to post questions to this forum, however I tried in the C# forum and had no luck there either. Do you know if there is a way to raise the issue with Microsoft directly?

Thanks
Joyzhao-MSFT 15,651 Reputation points

2020-09-25T06:58:58.107+00:00

Hi @William Buchanan ,

You could reach Microsoft directly at : https://support.microsoft.com/en-us/assistedsupportproducts

But as I concerned, ReportViewer is only supported for WinForm/WebForm, MVC project is not supported. Or you could try find third party reportviewer in VS extension, maybe that is also a direction.

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William Buchanan 61 Reputation points

2020-09-28T03:14:09.147+00:00

This control is heavily used in MVC applications. We have been using it for several years within our MVC application, but I will try and contact them.
William Buchanan 61 Reputation points

2020-09-28T03:31:42.973+00:00

So - despite having a VS pro license it seems we can't contact MS support. So frustrating.
Joyzhao-MSFT 15,651 Reputation points

2020-10-02T02:49:23.093+00:00

Hi,
In my opinion, MS officially only support Report Viewer in winform/webform. I doubt even if we reached MS report viewer develop team, they could hardly offer support on this issue....
Regards，
Joy

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ReportViewer control parameters reset when Async

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