Under Review
Last Updated: 13 May 2025 14:32 by ADMIN
I am encountering issues when using the objectDataSource wizard in the Web Report Designer that are not issues with the Standalone Report Designer. The Telerik Reporting version is 19.0.25.313. I created an object data source class that returns "Widgets" in a DataSet and a report "Demonstrate objectDataSource issues in Web Report Designer.trdx" to demonstrate the issues.

1. The data member list in "Choose a data member" (step 2) of the objectDataSource wizard in the Web Report Designer does not appear to be in alphabetical order as it is in the Standalone Report Designer. When there are many data members it is hard to pick the one you want when not ordered alphabetically.

2. For a data member that returns a DataSet result, a table row has to be returned for the design time feature to generate a data schema. In the Standalone Report Designer a returned row is not necessary, all that is required is a returned DataSet with a Table with Columns setup. It would be easier when using Web Report Designer to not require data returned to establish the data source data schema. In the WidgetDataSource a fake row is returned for the sake of having the data schema generated.

3. In the Web Report Designer objectDataSource wizard, once the "Preview data source results" (step 4) are ready and the Finish button is clicked, there is another call to the data source member but instead of using the Design-Time Values for the member, the values in the Value column appear to be used. If report parameters are already assigned to the data source parameters the string of the Value (e.g. "= Parameters.StartDate.Value") is used instead of the report parameter value. I think the data member call to generate the data schema should be the Design-Time Values again. In order to get the data schema generated I had to use the same values for Value column as in the Design-Time Values value. After the data source parameters are assigned to report parameters then it breaks the generation of the data schema later when the report is opened again in the Web Report Designer and there is an error (e.g. Error An error occurred while loading the data schema for "Widgets". ("Message"."String was not recognized as a valid DateTime.").

4. In the Report Previewer for the Web Report Designer there does not seem to be a way to provide a null value to a nullable data source parameter. For the GetWidgets member the FromEffectiveDate parameter is a nullable DateTime. After the data source is configured the data source parameter DataType is set to String, it did not resolve to nullable DateTime. Even after I change the data source FromEffectiveDate parameter to DataType of DateTime it cannot accept a null value from a DateTime report parameter, it seems to be interpreted as string instead of null. In the Standalone Report Designer there is no problem having a DateTime report parameter passing null to a nullable DateTime data source parameter; after reconfiguring the data source in the Standalone Report Designer the DataType for the data source parameter is <DataType>System.Nullable`1[System.DateTime]</DataType> instead of <DataType>System.DateTime</DataType> as from the Web Report Designer.

5. This is not a specific objectDataSource wizard issue but rather a general issue in the Web Report Designer. I cannot create a Report Parameter with the same name as a data source parameter or CSV data source field. Trying to do so results in an error message (Error Could not change property 'Name'. Name 'FromEffectiveDate' already exists). This issue can be demonstrated in the Web Report Designer Demo page: create a parameter for the yearDataSource data source, try to create a report parameter with the same name to get the error. Using report parameter names that are also data source parameter names works fine in the Standalone Report Designer.
Under Review
Last Updated: 02 Mar 2025 18:39 by Greg

I understand that the ReportViewer has a very different paradigm from, say, the RadGridView.  However, I believe they should and could be much more similar.  With some fairly minor tweaks ReportViewer could be made to be a proper member of the C#/XAML/MVVM environment.  Particularly what is needed is a binding to the data source, just like RadGridView's "ItemsSource".

I've begun a discussion in the forum about this topic at https://www.telerik.com/forums/reporting-and-mvvm.  With Momchil's help I was able to create a workable solution for my scenario, but it required code that, in my opinion, I shouldn't have to write.

I'd be more that willing to chat about this further and provide more thoughts and details, but since we've made it all the way to 2024 without this being raised, I tend to assume the needs I've expressed may not be as universal as I'd assumed they would be.

Thanks!

Under Review
Last Updated: 11 Dec 2024 15:08 by ADMIN
Created by: Paolo
Comments: 0
Type: Feature Request
1

Inside telerik designer for reports actually if you wish to use an RGBA color, you would need to manually write it.

And generally color choise / picking its a little old style.

-> Would be nice to modernize the UI for color management and implement a COLOR PICKER.

Under Review
Last Updated: 14 Oct 2024 07:54 by Martin

I am working on a report in the .NET Report Designer that takes time parameters.  I am looking for a way to replace the DatePicker that is used in the Report Designer parameters section with the DateTimePicker, but I've been told by support that there is no way to do that.

At a minimum, I need a way to specify which picker (Date, Time or DateTime) that the Designer should use.  Being able to specify a format would be helpful also.  Ideally the stand alone designer would provide a way to customize and view a custom template that is developed for the HTML5 Report Viewer.

I'm stilling trying to figure out what I have to do, but it appears every time a modify the report I'm not going to be able to view it in the Designer and instead I'm going to have to view it in the Report Viewer in the main application, which will be a much slower and more cumbersome process.

Under Review
Last Updated: 29 Jul 2024 07:49 by ADMIN
I am currently using Telerik Server within a Kubernetes environment and have encountered some challenges regarding data persistence and deployment management. I would appreciate your guidance on the following points:

When our Kubernetes pod restarts, all existing data is erased. Could you please advise on best practices or recommended approaches to ensure persistent data storage for Telerik Server? Specifically, how can we configure Telerik Server to retain data across pod restarts?
 

We are exploring using Helm or Terraform to manage our Telerik Server deployments on Kubernetes. Could you provide insights or best practices on integrating Telerik Server deployments with Helm charts or Terraform modules? What considerations should we keep in mind for configuring Persistent Volumes and Persistent Volume Claims (PVCs) to ensure data persistence?
Your expertise and guidance on these matters would be highly valuable to us as we aim to optimize our deployment strategy for Telerik Server in Kubernetes.

Thank you for your attention to this request. I look forward to your response.

Thanks,

Shyam M
Under Review
Last Updated: 16 Jul 2024 11:04 by ADMIN
Created by: Daniel
Comments: 1
Type: Feature Request
1

Hello

I see a design issue using JsonDataSource and possible nested objects/arrays and providing data in runtime.

 

Setting up a "root" JsonDataSource is no problem. Also the way setting the json trough parameters.

 

The issue begins when I want to use a nested array AND the root object. 

Example Json
{
"InvoiceDate" :  "2024-01-01",
"InvoiceNo":"IN2024-001",
"Positions" : [
{
"Product":"Product 1",
"Price" : 5.25
},
{
"Product":"Product 2",
"Price" : 10.5
}
]
}

The approach using JsonPath for accessing the "Positions" is ok but I have to set up another JsonDataSource with the same json and so that I can access the nested array. 

And now I don't now how to set the Source of the second JsonDataSource in runtime. Setting it using parameters is only possible with one DataSource.

A nice approach would be binding the Source of the second JsonDataSource to the first JsonDataSource with a JsonPath. So we could avoid duplication of data.

Or let us bind to a nested object in a table.

 

Under Review
Last Updated: 16 Jul 2024 08:36 by ADMIN

My scenario is that I am exporting a report to Excel, and I need to format one of my columns that display numerical data with a specific culture.

I can achieve this with the FormatWithCulture text function but then Excel does not treat the values in that column as numbers which is why I have to use the Format property of the item, and return a number in the Value of the textbox.

Unfortunately, the Format property does not allow specifying a culture that will be used for the formatting so the culture on the server is always used. I need to change that dynamically with a report parameter.

 

Under Review
Last Updated: 04 Jul 2024 12:50 by ADMIN
Created by: Sam
Comments: 1
Type: Feature Request
0

Hi Team,

I would like to put in a request for PPT export option for Telerik reports. Our end users want the ppt file to be editable. One of your team members suggested that there is an existing ppt export format, but it is not editable at the moment.  Having an editable option is preferable.

Thanks

Samyutha Ravindran

Under Review
Last Updated: 05 Apr 2024 08:39 by ADMIN

Using the November 2023 Report Designer, when a resize a Panel and then press Ctrl-Z to undo the resize, all objects within the Panel are lost.

I was able to confirm this by saving as a second copy and then comparing the XML between them.

Under Review
Last Updated: 01 Apr 2024 09:46 by ADMIN

Currently the Webdesigner makes up to 6(?) and the Standalone Designer as much as it needs without(?) limit.

Especially the latter case can quickly lead to a lot of connections, saturating the max allowed connections of a sql server, which also leads to other services depending on a sql server connection to fail.

As far as I've seen, this only happens with Charts in Design mode.

So there are multiple ways to handle this:

  • Being able to specify the max concurrent connections in the designer
  • Make the usage of the DataSource more efficient by only loading the data once (like in the report viewer)
  • Being able to turn off the chart preview in the Designer (By configuration, not with a user settable option)


See the attached report for a simple example:

It contains a single Datasource, which is a postgres query which simply waits 10s before returning the result.
After updating the DataSource to something which works for you and saving, simply reopen the report and see how many connections are opened in parallel.

With kind regards
Dominik Rothert

Under Review
Last Updated: 27 Dec 2023 09:46 by ADMIN
When a Report Parameter is send via REST or the CreateDocument, and there is a list of values defined in the Report, if the Value isn't found in the list (case matching) a message like "parameter doesn't exist in the list content" (or something similar) would be much more helpful than the same "missing or invalid parameter" that is returned when indeed, a parameter that is required was not passed in.
Under Review
Last Updated: 16 Oct 2023 08:46 by ADMIN
Created by: NPL IT
Comments: 1
Type: Feature Request
2
When you preview a Telerik report the report automatically saves.  Unlike Visual Studio, PowerPivot, SSRS, etc.. a preview in Telerik reporting overwrites your vetted production report with all uncommitted changes.  This has cost us significant time and headaches.  There are very good reasons every other piece of software in the world decouples preview from save.  Is there any reason Telerik reporting behaves in a way that makes it easier than other software products to commit flawed changes to production files?
Under Review
Last Updated: 26 Sep 2022 09:37 by ADMIN

Hello

I have a problem with report generating. We use HTML5 report viewer and basic implementation of ReportsControllerBase on server.
I've noticed that we have the CPU/memory recourse consumption after immediately pressing Stop Rendering button. The time of consumption recourses is the same as time without cancelling(about 18-20 second in my example)
There is log with calls of report generating. Last one with cancelling, previous without. 
(see
*** ReportProcessor.ProcessReport DONE in 00:00:16.1918150 ***
and
*** ReportProcessor.ProcessReport DONE in 00:00:16.8522950 ***)

I've investigated how cancelation is working.
The Stop Rendering button send DELETE request to ReportsControllerBase.DeleteReport endpoint. It does something and set IsDeleted flag for document.
Then DocumentCancellationController.ThrowIfCancellationRequested() is called in some specific places in app. You can see that method in log.txt, so it was called after pushing the button.

I've profiled the hot path of generation of report. See hotpath.png.
The most CPU intensive work happens in ReportProcessor.ProcessRepourtSource()...
Pay attention to rendering calls.png - the first red dot here - ReportProcessor.ProcessRepourtSource() call.
The second - where the exception and actual cancelation happens.
I'm expecting it should happen much earlier and cancellation of generation of document(and resources consumption) will finish ASAP.

By the way, I see some cancelation checks in ReportProcessor.ProcessRepourtSource() as well - see throwIfCancellation.png
But cancelation request came after these check and most intensive CPU works already started.


Is it possible to fix that?

Under Review
Last Updated: 15 Aug 2022 15:41 by ADMIN

I display the WPF Report Viewer control in a closable tab. To free the resources I invoke DisposeViewerResources on tab close as described here: https://docs.telerik.com/reporting/embedding-reports/display-reports-in-applications/wpf-application/disposing-the-report-viewer-resources

However, I see the following dialog every time. There is no way to capture this error or suppress the dialog.

Under Review
Last Updated: 09 Aug 2022 14:24 by ADMIN
Created by: Stewart
Comments: 1
Type: Feature Request
5

I am currently investigating including the Telerik Reports in our products but when I load the Web Report Designer it loads a theme which is overwriting our custom theme. 

Is there any way to prevent this so that we keep our custom theme?

Under Review
Last Updated: 08 Jun 2022 08:05 by ADMIN
Created by: Patrick
Comments: 1
Type: Feature Request
2

Hi,

It would be necessary to have a way to export a sub-report to a trdx file with the designer. Also, the same tool could be used to import a sub-report into an XML source. Currently, it takes a lot of acrobatics to be able to do this work.

Thank you for your help!

Under Review
Last Updated: 06 Apr 2022 10:34 by ADMIN

Please add DropDownTree and/or TreeView as single- and multi-value parameter editors to accommodate Hierarchical data. It would be nice to have them out-of-the-box when available values come from a hierarchical/self-referencing table(s), but I would be happy if they could be integrated as Custom Parameter Editors. I was able to render and populate the dropdowntree with checkboxes, pass the correct selected values, but the 'Preview' button would never enable upon selection. Also, the dropdowntree's AutoClose(false) was not recognized. I know this can be achieved outside of the report viewer, but sometimes that method disrupts the layout and flow of the reporting view.

 

Under Review
Last Updated: 04 Feb 2022 09:39 by ADMIN
Unable to get report parameters.
An error has occurred.
Type: Telerik.Reporting.ReportSerialization.Current.ReportSerializable`1[Telerik.Reporting.Report]
Under Review
Last Updated: 09 Dec 2021 08:38 by ADMIN
Created by: Cedric
Comments: 1
Type: Bug Report
0

I am using the stand alone report designer, connected to a report server.
In the report I am designing, I have several cross tabs. We now want to create the same crosstabs, with additional filtering for the data.

- I copy the existing crosstab, then paste it.

Both cross tabs now reference the SAME row groups. Because of this, when I edit the filters, it just doesn't work. Looks like there are reference issues when the copy / paste is done, not all the objects within the cross tab are getting a new copy.

 

Original crosstab - it has a row group called "groupName1" :

 

Copied crosstab - same "groupName1" row group - it shouldn't be the same row group object.

Under Review
Last Updated: 23 Jul 2021 11:52 by ADMIN

I would like to be able to access the report template layout using the ref so that I can save the report template outside of the designer.  Similar to this:

 

<button type="button"class="btn btn-light btn-sm" @onclick="Save">Save</button> <WebReportDesigner @ref="designer1" DesignerId="wrd1" ServiceUrl="/api/reportdesigner" Report="Dashboard.trdp" ToolboxArea="new ToolboxAreaOptions() { Layout = ToolboxAreaLayout.Grid }" PropertiesArea="new PropertiesAreaOptions() { Layout = PropertiesAreaLayout.Categorized }" /> @code { WebReportDesigner designer1; void Test() { var layout = (byte)designer1.Report.Layout;

} }

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