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Posted by: mdynna on 4 September 2024, 12:26 pm EST
mdynna
Posted 4 September 2024, 12:26 pm EST
When building a custom Page Report with a Parameter, when clicking on Preview it prompts the user for a Parameter value to select before running the report. After our users have built a report we want to be able to have them simply run it and display the results in a Viewer control. Is there a way to get the Viewer control (on a Form with the control) to prompt for a Parameter value the way the report Designer does?
katyayny.raghuvanshi
Posted 5 September 2024, 4:37 am EST - Updated 5 September 2024, 4:42 am EST
Hi Mark,
ActiveReports does provide Viewers that support technologies like Blazor, ASP.NET Core, ASP.NET MVC, Angular, React, HTML5/JS, WPF, and WinForms. You may refer to the attached link to know more about them: Report Readers
Also, please note that if you have a parameter that can’t be null or does not have a default value specified, then it will require the user to enter the parameter value before rendering the report. To overcome that, you can make the parameter accept null values by checking the Allow null values option of the parameter (see NullValues.png). For setting default value of the parameter, you may refer to the attached documentation page: Hidden Parameter. Here you can skip the option of making the parameter Hidden so that you can also change its value via the Viewer as well.
We hope this helps!
Attachments:
mdynna
Posted 5 September 2024, 2:03 pm EST - Updated 5 September 2024, 2:09 pm EST
We are using a WinForms Viewer. When the user is creating a report in the Designer, when they click Preview it will prompt them to fill in the (required) parameter automatically.
katyayny.raghuvanshi
Posted 6 September 2024, 12:19 am EST
Hi Mark,
We tested with ActiveReports v18.1.1 and could observe the same behavior in both the Designer preview and Winforms Viewer. Both the Designer preview and Winforms Viewer prompted the parameter pane before rendering the report. Please see the attached screenshare video demonstrating the same. If the issue persists, please share with us the following:
Attachments: ParamIssue.zip
mdynna
Posted 6 September 2024, 11:08 am EST
We’re using Active Reports 17.0.2. With the SectionReports that we use we normally just call Report.Run and then pass Report.Document to the Viewer’s LoadDocument method. Should we be using a different method for the PageReports that have parameters?
katyayny.raghuvanshi
Posted 9 September 2024, 3:34 am EST
Hi Mark,
Please refer to the attached sample where we have loaded a Page Report that contains parameters to the Winforms Viewer. In the report, there are 2 parameters. The first parameter has no value specified, and it is non-nullable, so it will prompt the user to enter it’s value before rendering the report. For the second parameter, we have specified a default value via code.
Let us know if you still have any issues.
Attachment: PageReportParameter.zip
mdynna
Posted 9 September 2024, 6:17 pm EST
Ok, got it. You don’t call Report.Run you just call Viewer.LoadDocument and then it prompts for parameters. Thanks.
