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Blank pages between table parts.

Hello and sorry if it has been questionned before but I couldn't get my answer on the previous topics.

For short story : I have arrays in SubReports that I show in my main report. These are big arrays and therefore they spread between pages which is not a problem but between the pages with the parts of the array there is always a blank page.

Now for more informations:

- Both my main report and my subReports are A4 formatted with 0 margins and 21cm width.

- In my DetailSection I have List (21cm width) that contains a List (21cm width) that contains my SubReportItem (21 cm width)

- I have many arrays but the 2 having a problem are the big ones that spread to multiple pages.

- All the "KeepTogether" properties are set to false wherever that was possible

- In the subreports, I created Tables and not CrossTabs

- I tried to generate a report only using what's supposed to be the subReport and they spread ok between the pages without blanks which makes me think the problem comes from the fact that they are SubReports ?

SubReport
Table
Ivet
Telerik team
 answered on 07 Aug 2025
1 answer
19 views
Export to Word: Missing Text

I have a report that I'm viewing in a WPF app.  The report looks perfect on-screen and when I export to PDF.  However, when I export to "Word Document", there are a few fields that simply don't show up in the Word document.  There is also, in the page footer, a horizontal line that comes out as just a partial line, and footer text that doesn't appear at all.

Are there any pointers or suggestions to get these working?

 
Report Designer (standalone)
Report Viewer - WPF
Petar
Telerik team
 answered on 07 Aug 2025
2 answers
14 views
Reporting: RendererNotAvailable exception when RenderReport

Hello,

Im using version Telerik Reporting 18.2.24.806 (Q2-2024).

Template file is .trdx

Below is my code:

var reportProcessor = new ReportProcessor();
var deviceInfo = new Hashtable();
deviceInfo.Add("ComplianceLevel", "PDF/A-3b");
 deviceInfo.Add("FontEmbedding", "Full");

var result = reportProcessor.RenderReport("pdf", reportSource, deviceInfo);

after run happen error: 

Telerik.Reporting.Processing.RendererNotAvailableException
  HResult=0x80131500
  Message=PDF rendering format is not available.
  Source=Telerik.Reporting
  StackTrace:
   at Telerik.Reporting.Processing.ReportProcessor.GetExtensionInfo(String format, IEnumerable`1 extensions)
   at Telerik.Reporting.Processing.ReportProcessor.ProcessAndRender(String format, ReportSource reportSource, Hashtable deviceInfo, IRenderingContext renderingContext, CreateStream createStreamCallback)
   at Telerik.Reporting.Processing.ReportProcessor.ProcessAndRenderStateless(String format, ReportSource reportSource, Hashtable deviceInfo, IRenderingContext renderingContext, CreateStream createStreamCallback)
   at Telerik.Reporting.Processing.ReportProcessor.<>c__DisplayClass46_0.<RenderReport>b__0(SingleStreamManager sm)
   at Telerik.Reporting.Processing.ReportProcessor.RenderReportSafe(Func`2 renderCallback, String format, IRenderingContext renderingContext)
   at Telerik.Reporting.Processing.ReportProcessor.RenderReport(String format, ReportSource reportSource, Hashtable deviceInfo, CancellationToken cancellationToken)
   at Telerik.Reporting.Processing.ReportProcessor.RenderReport(String format, ReportSource reportSource, Hashtable deviceInfo)
Rendering
IT
Top achievements
Rank 1
Iron
 answered on 05 Aug 2025
1 answer
26 views
Prevent line break for certain characters (whitespace, hyphen, colon)

We have a longer text in our report, which also contains this string "ISO 5834-1:2019", which we don't want to break into a new line.

Reporting Services seem to have the possibility to use the chr()-function to inject 'unbreakable' characters, but this doesn't seem to work in Telerik Reports.

How can we make sure, that there is no line break possible for the given string? 
(Line break in the rest of the text is ok, though.)

Report Designer (standalone)
Report Viewer - MVC
Petar
Telerik team
 answered on 04 Aug 2025
1 answer
14 views
blank report after upgrading to 19.1.25.716 (html 5 viewer)

Hi, I recently upgraded from 19.1.25.716 to 19.0.25.313. I updated my stand along designer, regenerated reports, and updated my dlls and js files. I was recieving telerikViewer does not exist errors, so I referenced telerikReportViewer-19.1.25.716.min.js in addition to telerikReportViewer.kendo-19.1.25.716.min.js and the error went away.

When I view the report, the report is blank except for a splitbar. However, if I view the DOM in dev tools, the report is there with data. If I remove the class "trv-pages-pane" from one of the div elements, the report appears (though the parameter input fields are still hidden).

Any idea as to what's going on?

$("#reportViewer7")
                .telerik_ReportViewer({
                    serviceUrl: "http://example.com:7655/api/reports/",
                    authenticationToken: "xxxx", 
                    reportSource: {
                        report: "7_0"
                    }
                });

Rendering
Report Viewer - HTML5
Upgrade
Ben
Top achievements
Rank 1
Iron
 answered on 30 Jul 2025
1 answer
19 views
getting blank report screen

 Users are getting a white screen when opening reports. It is intermittent. Once it happens for one user it happens for others but not all

telerik report version is ; 16.1.22.622

Report Designer - Web
Dimitar
Telerik team
 updated answer on 28 Jul 2025
1 answer
15 views
Select Parameters not showing selected

We are using Telerik report server version 2025Q2 with a Blazor UI, since we have upgraded when you select a parameter in the parameter list it does not shade it or do anything to indicate it has been selected. The report does run so it's really selecting the parameters but it does not reflect that. Is there a fix for this?

Thanks,

Toya

Report Parameters
Report Viewer - Blazor
Dimitar
Telerik team
 answered on 25 Jul 2025
1 answer
19 views
Winforms - Can't cast UriReportSource to InstanceReportSource

I need to get the values of some fields shown on a report in a VB.NET / Winforms app, and I've used the code from here;

https://docs.telerik.com/reporting/embedding-reports/program-the-report-definition/access-report-items-programmatically

However, I'm experiencing a crash at the first step of getting the InstanceReportSource with a cast exception as per the title.

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Dim instanceReportSource As InstanceReportSource =
                DirectCast(Me.TKReportViewer.ReportSource, InstanceReportSource) <========= Invalid Cast here
    Dim report As Telerik.Reporting.Report =
                DirectCast(instanceReportSource.ReportDocument, Telerik.Reporting.Report)

    Dim txt As Telerik.Reporting.TextBox =
                TryCast(report.Items.Find("quoteReferenceNumber", True)(0), Telerik.Reporting.TextBox)

End Sub

I can't find any other questions / answers on this - anyone have an idea what might be wrong?

Report Viewer - WinForms
Ivet
Telerik team
 answered on 18 Jul 2025
1 answer
13 views
How to Implement custom event handling logic in the ReportViewer component.
Is it possible to implement the logic for handling the "Send" button click in the email sending window?
I want to notify the user when the email has been sent and display a loading indicator to prevent user interaction with the interface, as sending emails can sometimes take a while.
Events
General Discussions
Ivet
Telerik team
 answered on 18 Jul 2025
1 answer
21 views
Reporting continuous scrolling is not working in custom template

Hello,

I'm working on adding a custom template to our reports. I based it on the example that is given with the latest telerik reporting. Our designer would like us to get rid of the pagination (Our reports are max 2-3 pages) and move the parameters area around a bit, so I added the following template:

<template id="trv-report-viewer">
    <div class="trv-report-viewer w-100 h-100 gap-4">
        <div data-role="splitter" class="trv-parameters-splitter ">
            <div data-id="trv-parameters-area" class="trv-parameters-area w-25" data-role="telerik_ReportViewer_ParametersArea">
                <div class="d-flex flex-column pe-4">
                    <div class="d-flex align-items-center px-3">
                        <h3 class="flex-grow-1 ps-3">Report</h3>

                        <div class="trv-side-menu d-flex gap-3" data-role="telerik_ReportViewer_SideMenu">
                            <ul class="d-flex flex-row  gap-2" aria-label="ariaLabelSideMenu">
                                <li aria-label="ariaLabelMenuNavigateBackward">
                                    <a data-command="telerik_ReportViewer_historyBack" title="menuNavigateBackwardTitle" href="#" class="element_Action shadow-none bg-none pb-0">
                                        <i class="bi bi-arrow-90deg-left"></i>
                                    </a>
                                </li>
                                <li aria-label="ariaLabelMenuNavigateForward">
                                    <a data-command="telerik_ReportViewer_historyForward" title="menuNavigateForwardTitle" href="#" class="element_Action shadow-none bg-none pb-0">
                                        <i class="bi bi-arrow-90deg-right"></i>
                                    </a>
                                </li>

                                <li class="element_Action " aria-label="ariaLabelMenuRefresh">
                                    <a data-command="telerik_ReportViewer_refresh" title="ariaLabelMenuRefresh" class="element_Action shadow-none">
                                        <i class="bi bi-arrow-clockwise"></i>
                                    </a>
                                </li>
                                <li aria-label="ariaLabelMenuToggleMenu">
                                    <button
                                        title="Toggle Filter"
                                        type="button"
                                        class="element_Action shadow-none"
                                        onclick="toggleReportViewerParameters(event, this)">
                                        <i class="bi bi-sliders2-vertical"></i>
                                    </button>
                                </li>
                            </ul>
                        </div>
                    </div>

                    <div class="reportViewer_Parameters ">
                        <div class="trv-parameters-area-content" role="complementary">
                            <div class="trv-parameters-wrapper"></div>
                        </div>

                        <div class="trv-parameters-area-footer mt-3">
                            <button type="button" aria-label="ariaLabelParametersAreaPreviewButton" class="element_Button trv-parameters-area-preview-button">Preview</button>
                        </div>
                        <div class="trv-error-pane k-tooltip-validation k-widget">
                            <div class="trv-error-message"></div>
                        </div>
                        <div class="trv-parameters-area-overlay"></div>
                    </div>

                    <div class="d-flex flex-wrap gap-1 px-2 align-items-center reportViewer_exportOrPrint">
                        <select
                            name="exportFormat"
                            class="reportViewer_exportFormat flex-shrink-0"
                            onchange="changeReportExportFormat(this)">
                            <option value="PDF">Adobe (PDF) file</option>
                            <option value="CSV">CSV (comma delimited)</option>
                            <option value="XLS">Excel 97-2003</option>
                            <option value="XLSX">Excel Worksheet</option>
                            <option value="PPTX">PowerPoint Presentation</option>
                            <option value="RTF">Rich Text Format</option>
                            <option value="IMAGE">TIFF File</option>
                            <option value="MHTML">Web Archive</option>
                            <option value="DOCX">Word Document</option>
                            <option value="XPS">XPS Document</option>
                        </select>

                        <button class="element_Button reportViewer_exportButton" data-command="telerik_ReportViewer_export" data-command-parameter="pdf">Export</button>
                        <span class="is-dimmed px-1">or</span>
                        <button class="element_Button" data-command="telerik_ReportViewer_print">Print</button>
                    </div>
                </div>
            </div>

            <div class="k-splitbar k-splitbar-horizontal"></div>

            <div class="trv-content-wrapper w-75 bg-darkcloud">
                <div data-id="trv-pages-area" class="trv-pages-area border-0 p-4" data-role="telerik_ReportViewer_PagesArea" role="main" aria-label="ariaLabelPagesArea">
                    <div class='trv-page-container'>
                        <div class='trv-page-wrapper active'></div>
                    </div>

                    <div class='trv-error-pane'>
                        <div class="trv-centered k-tooltip-validation">
                            <div class='trv-error-message'></div>
                        </div>
                        <div style="clear: both;"></div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<!--PARAMETERS-->
<template id="trv-parameter">
    <div class="trv-parameter-container mt-3">
        <div class="trv-parameter-header">
            <div class="trv-parameter-title label is-dimmed ps-3"></div>
        </div>

        <div class="trv-parameter-error">
            <span class="trv-parameter-error-message"></span>
        </div>
        <div class="trv-parameter-value"></div>
    </div>
</template>

<template id="trv-parameter-editor-available-values-multiselect">
    <div class="trv-parameter-editor-available-values-multiselect">
        <div class="trv-list"></div>
        <div class="trv-parameter-actions">
            <button class="trv-select-all element_Action">parameterEditorSelectAll</button>
            <button class="trv-select-none element_Action">parameterEditorSelectNone</button>
        </div>
    </div>
</template>

<template id="trv-parameter-editor-available-values-multiselect-combo">
    <div class="trv-parameter-editor-available-values-multiselect">
        <div class="trv-combo"></div>
        <div class="trv-parameter-actions">
            <button class="trv-select-all element_Actionelement_Action">parameterEditorSelectAll</button>
            <button class="trv-select-none element_Actionelement_Action">parameterEditorSelectNone</button>
        </div>
    </div>
</template>

<template id="trv-parameter-editor-available-values">
    <div class="trv-parameter-editor-available-values">
        <div class="trv-list" id="trv-parameter-editor-singleselect-list"></div>
        <div class="trv-parameter-actions">
            <button class="trv-select-none element_Action">parameterEditorSelectNone</button>
        </div>
    </div>
</template>

<template id="trv-parameter-editor-available-values-combo">
    <div class="trv-parameter-editor-available-values">
        <div class="trv-combo" id="trv-parameter-editor-singleselect-combo"></div>
        <div class="trv-parameter-actions">
            <button class="trv-select-none element_Action">parameterEditorSelectNone</button>
        </div>
    </div>
</template>

<template id="trv-parameter-editor-datetime">
    <div class="element_DateTimePicker">
        <input type="datetime" class=" trv-parameter-editor-datetime" />
    </div>
</template>

<template id="trv-parameter-editor-text">
    <div class="element_Input">
        <input type="text" class=" trv-parameter-editor-text" />
    </div>
</template>

<template id="trv-parameter-editor-number">
    <div class="element_Input">
        <input type="number" step="any" class=" trv-parameter-editor-number" />
    </div>
</template>

<template id="trv-parameter-editor-boolean">
    <input type="checkbox" class="element_Checkbox trv-parameter-editor-boolean" />
</template>

<template id="trv-parameter-editor-multivalue">
    <div class="trv-parameter-editor-multivalue element_Textarea">
        <textarea></textarea>
    </div>
</template>

Now i can see that I got multiple pages loaded, but if I scroll, then the follow-up pages do not load.

Here is how we call the template:


<telerik:ReportViewer
    ID="html5ReportViewer" ServiceUrl="/api/reports"
    EnableAccessibility="false"
    PersistSession="false"
    ParametersAreaPosition="Left"
    TemplateUrl="~/reportTemplate/reportViewerTemplate.html"
    PageMode="ContinuousScroll"
    ScaleMode="FitPageWidth"
    runat="server">

If I remove the TemplateUrl, then everything works as expected. The extra classes I added are from Bootstrap.

 

If anyone has an idea what is wrong with my template, please let me know. I've tried replacing the whole thing with the file from C:\Program Files (x86)\Progress\Telerik Reporting 2025 Q2\Html5\ReportViewer\templates but it didn't solve the issue.

 

Thanks for your future input!

Report Viewer - HTML5
Kallol Mahata
Top achievements
Rank 1
Iron
 answered on 16 Jul 2025
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