Pending Review
Last Updated: 17 Feb 2020 13:40 by ADMIN
We have found a problem, which is that the filters do not seem to take the EnableEmbeddedBaseStylesheet settings from the Grid.
Pending Review
Last Updated: 12 Feb 2020 11:28 by ADMIN

Issue #1. When the Grid is not having any records (i.e. when the grid is initialized for the first time), if we define the Detail Item Template than the item template is shown 10-11 times. 

Issue#2: When we have the pagination enabled in the grid and the records are fully filled on the first page and suppose the second page is half-filled with records, then in this scenario On the second page even the records of the first page are hidden but the data item template for those rows are visible which is not correct. Screenshot is attached.

Issue #3: The same scenario is happening when we searched the grid first with 10 records and then we search for 2 records, In this case also 8 records will be removed but there data item templates will still be visible on the grid.

Pending Review
Last Updated: 18 Feb 2020 08:59 by ADMIN

With no filtering applied, the filter menu still highlights the filter-function defined in the CurrentFilterFunction property of the column.

Pending Review
Last Updated: 05 Feb 2020 15:24 by ADMIN
Created by: Mark
Comments: 1
Category: ComboBox
Type: Bug Report


Microsoft Edge 44.18362.449.0

Telerik Control:


Teleri Version:  Version=2017.3.913.45,


When a item is selected and a postback is occured, the SelectedValue returns an empty string.

Expected behavior:

The correct SelectedValue should be return.

Thing that have been tried so far:

1: upgrade the telerik to the latest version (2020.114) ---> issue persists

2: set autopostback to "true" problem solved

3: use other browsers (chrome, FireFox, new Version 79.0.309.68 ) issue disappears

Sample code: 

1: aspx

        onitemsrequested="ddlSupplier_ItemsRequested" autopostback="false">

2: code behind

protected void Page_Load(object sender, EventArgs e)
    protected void saveIssue_Click(object sender, EventArgs e)
    protected void ddlSupplier_ItemsRequested(object sender, Telerik.Web.UI.RadComboBoxItemsRequestedEventArgs e)
        RadComboBoxItem li = new RadComboBoxItem("Alan Jones (Brunel Systems Pty Ltd, test site)", "123");
         li = new RadComboBoxItem("Jackie Chiu (Optimum Construction, Optimum Construction (Sydney)) ", "23" );
         li = new RadComboBoxItem("Erik Baker (Optimum Construction, Optimum Construction (Sydney))", "2323");
    protected void b_Click(object sender, EventArgs e)
        var a = ddlSupplier.SelectedValue;  // most of the time returns "" for Edge





Pending Review
Last Updated: 28 Jan 2020 15:46 by ADMIN

Hello @support!

Did you observe the behavior, that Firefox (v71.0 64bit) does not turn the rad grid into edit mode, whereas IE11, Edge, Chrome (v78) perfectly work ok on the same grid?

Clicking the edit stencil button only makes the two arrows below rotate for some seconds, but nothing happens. What could that be?

Video Demo is attached.

Thank you,

Pending Review
Last Updated: 23 Jan 2020 15:30 by ADMIN
In a GridDateTimeColumn I have some value data with milliseconds like "2018-09-24 18:05:21.057"

Filtering with the milliseconds returns no results.

Then I remove milliseconds part "2018-09-24 18:05:21"

Filtering without that will return results.

Even with the EnableTimeIndependentFiltering property set to True, the milliseconds are not ignored, and the filtering mechanism doesn't find the records.
Pending Review
Last Updated: 28 Oct 2019 08:23 by David

If using Frozen Columns with MultiHeaders, where one column has many headers while the other fewer. Each header in a column occupies some space and they get hidden, this will cause the upper (header) portion of the Grid to change its size. With that, the scrollbar will move away from the mouse position and causes the scrolling jump back and forth resulting in flickering.

Demo video of the issue: RadGrid FrozenColumns Flickering Header. The video can be found in the attachments as well.


Pending Review
Last Updated: 25 Oct 2019 10:04 by CaseNet

Unable to open "columns" sub-menu inside RadGrid's HeaderContextMenu on mobile devices. It does work on desktop PCs regardless of the OS.

Issue can be replicated starting with the version 2019 R1. Not present on previous versions (2017 and 2018 were tested)


Pending Review
Last Updated: 05 Aug 2019 17:03 by ADMIN


For the date picker and it's family of controls (time picker, date time picker), when using bootstrap skin, lightweight rendering and RTL page, the buttons for the picker are displayed on the wrong side of the control (the right side) instead of being displayed on the left side. I know this can be fixed using some CSS but although the html controls are in order (text and then button both in a container with RTL), the button is stuck to the right side somehow

please advise

Pending Review
Last Updated: 18 Jul 2019 12:22 by ADMIN

If the Page culture is set to anything other than "en-US", RadDatePicker in the HeaderContextMenu will loose the correct format and swaps the Day with the Month after filtering.

Pending Review
Last Updated: 28 Jun 2019 08:55 by ADMIN
When exporting to Excel XLSX while there are hidden columns at the end of the columns collection and an unused ColumnGroup, the application throws the exception of: Index was out of range. Must be non-negative and less than the size of the collection
Pending Review
Last Updated: 03 Jun 2019 08:01 by ADMIN
When Grouping in RadGrid while EnableLinqExpressions is set to True and some of the records contain null values will throw the exception: Object cannot be cast to DBNull
Pending Review
Last Updated: 30 Apr 2019 10:06 by ADMIN
If anchor links of GridButtonColumn do not define a text links are still rendered and screen readers read their href attribute. Anchor links with no text could define an attribute area-hidden="true".
Pending Review
Last Updated: 23 Apr 2019 08:33 by CaseNet
When the RenderMode of RadGrid is set to Mobile and UniqueName is different from the DataField then trying to Ungroup an item, it throws an exception: Object reference not set to an instance of an object
Pending Review
Last Updated: 01 Mar 2019 13:46 by ADMIN

Using an ampersand character in RadBarcode's Text leads to a server-side error. Replacing the symbol with its corresponding HTML entity allows the control to render its text successfully, but the generated image corresponds to the passed entity character.

If RadBarcode1.Text="&amp;" the control generates this (read as "&amp;"):

while it should be this (read as "&"):


When we generate the image by keeping ShowText = True, then it throws the exception.

When we generate the image by keeping ShowText = false, then it successfully generates the image.

Steps to reproduce:Run the following setup:

        <telerik:RadBarcode ID="RadBarcode1" runat="server" RenderChecksum="false"></telerik:RadBarcode>
    protected void Page_Load(object sender, EventArgs e)
        RadBarcode1.OutputType = Telerik.Web.UI.BarcodeOutputType.SVG_VML;
        RadBarcode1.Type = Telerik.Web.UI.BarcodeType.Code128;
        RadBarcode1.Text = "string&string"; //leads to server-side error
        //RadBarcode1.Text = "string&amp;string"; //leads to wrongly generated barcode

        RadBarcode1.LineWidth = 0;
        RadBarcode1.ShowText = true;
        RadBarcode1.ShowChecksum = false;

Pending Review
Last Updated: 12 Feb 2019 13:36 by ADMIN
Steps to reproduce the error.

Create a ClientDeleteColumn with CommandName="Delete" and wire up the onCommand client-event to RadGrid.

<telerik:RadGrid ID="RadGrid1" runat="server">
            <telerik:GridClientDeleteColumn CommandName="Delete" ButtonType="LinkButton"></telerik:GridClientDeleteColumn>
        <ClientEvents OnCommand="OnCommand" />

The event handler does not need to do anything.

function OnCommand(sender, args) {
Pending Review
Last Updated: 26 Nov 2018 15:13 by ADMIN
Created by: Peter Milchev
Comments: 0
Category: Calendar
Type: Bug Report
Workaround 1) Use .resx files as the attached ones 

Workaround 2) Set properties to ViewState
        RadMonthYearPicker1.MonthYearNavigationSettings.ViewState["_mCancelButtonCaption"] = "my cancel";
        RadMonthYearPicker1.MonthYearNavigationSettings.ViewState["_mTodayButtonCaption"] = "my today";
        RadMonthYearPicker1.MonthYearNavigationSettings.ViewState["_mOkButtonCaption"] = "my ok";
Pending Review
Last Updated: 08 Nov 2018 14:27 by Attila Antal
Created by: Attila Antal
Comments: 0
Category: UI for ASP.NET AJAX
Type: Bug Report
Images that reside in the grid will get resized (scaled down with about 3-5 %) which might cause issues, specially if exporting bar-codes, thus the bar-code scanners won't be able to read them.

Current workaround is to use the Telerik Documents Processing Library  and build the table manually where the images are inserted without changing the size.

Here is an example:

        protected void RadGrid1_InfrastructureExporting(object sender, GridInfrastructureExportingEventArgs e)
            Telerik.Web.UI.ExportInfrastructure.Table table = e.ExportStructure.Tables[0];

            Workbook workbook = new Workbook();

            Worksheet worksheet = workbook.ActiveWorksheet;

            foreach (var row in table.Rows)
                if (row.Index > 1)
                    worksheet.Rows[row.Index - 1].SetHeight(new RowHeight(55, true));

                foreach (var cell in row.Cells)
                    if (row.Index == 1 || cell.ColIndex != 2)
                        worksheet.Cells[cell.Index.Y - 1, cell.Index.X - 1].SetValue(cell.Value.ToString());
                        FloatingImage image = new FloatingImage(worksheet, new CellIndex(cell.Index.Y - 1, cell.Index.X - 1), 0, 0);
                        Stream stream = File.Open(Server.MapPath(cell.Value.ToString()), FileMode.Open);
                        using (stream)
                            image.ImageSource = new Telerik.Windows.Documents.Media.ImageSource(stream, "jpg");

            byte[] data;

            using (MemoryStream ms = new MemoryStream())
                XlsxFormatProvider xlsProvider = new XlsxFormatProvider();
                xlsProvider.Export(workbook, ms);
                data = ms.ToArray();

            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            Response.AppendHeader("Content-Disposition", "attachment; filename=" + RadGridLista.ExportSettings.FileName + ".xlsx");
Pending Review
Last Updated: 29 Oct 2018 16:08 by ADMIN
Created by: Peter Milchev
Comments: 0
Category: Grid
Type: Bug Report
If AllowPaging, AllowScroll and UseStaticHeaders are set to true, then there will be 2 empty <th> elements

        <ClientEvents OnGridCreated="OnGridCreated" />

    function OnGridCreated(sender, args) {
        var emptyth = $telerik.$(sender.get_element())
            .find("th").filter(function (ind, item) { return item.textContent == "" });
        // alert(emptyth.length)
        emptyth.append("<span style='display:none'>Hidden empty table header</span>")
Pending Review
Last Updated: 03 Oct 2018 17:00 by ADMIN
Simple reproducible is attached to illustrate the problem.

A workaround may be replacing RadButtons that invokes such postbacks with regular buttons and using a form decorator

Alternatively, you can simply disable the handler URL encryption

You can also put the following in the global.asax file to prevent the version from rendering on the page markup
        protected void Application_BeginRequest(object sender, EventArgs e)
			System.Web.HttpContext.Current.Items["_!TelerikVersionStampRendered"] = true;
or you can add the same line in a global Page_Load handler (e.g., in a base page class or in the master page your project uses)
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