When using the Grid with the Material skin, the drag selection overlay is not visible. After inspecting the DOM, I found that the overlay element uses the GridRowSelector_Material class:
<span class="GridRowSelector_Material" style="position: absolute; z-index: 1000100; opacity: 0.1; top: 525px; left: 321px; width: 844px; height: 36px;"></span>
However, this class is not defined in the Material skin's stylesheet, which results in the overlay having no visible background.
Steps to Reproduce:In version 2025 Q2, I am getting the following error message when opening the RadGrid in design mode:
System.NullReferenceException: Object reference not set to an instance of an object. at Telerik.Web.UI.Licensing.TelerikLicense.get_CurrentHost() at Telerik.Web.UI.Licensing.TelerikLicense.get_IsLicenseValid() at Telerik.Web.UI.RadGrid.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Design.ControlDesigner.GetDesignTimeHtml()
After upgrading to 2025 Q1, RadGrid throws the exception:
Uncaught TypeError: t is not a function
A workaround is to access the column and replace the text of the cell with a <label> control. Examples are attached below
GridAutoCompleteColumn columns cannot be created programmatically during OnLoad event, but only using the OnInit event. In the attached sample, if you comment out panelOnInit.Controls.Add(gridOnInit); and uncomment panelOnLoad.Controls.Add(gridOnLoad); when you click Edit in one row the following exception is thrown Cannot create column with the specified type name: GridAutoCompleteColumn But if you comment out panelOnLoad.Controls.Add(gridOnLoad); and uncomment panelOnInit.Controls.Add(gridOnInit); the sample works Note that if you change the GridAutoCompleteColumn for any other control type, for example GridHTMLEditorColumn, both methods will work.
Hi,
Heres a simple one: I have a dynamic grid `MasterTableView.EnableColumnsViewState = false;` on page init and all works fine. However, when the client/browser show a dynamic column thats hidden (or vise versa), and the column is gone on postback (being a dynamic grid this can happen), the LoadClientState tries to get the column - and if it fails to, it breaks down hard.. Instead it should just ignore it, as its just a pretty un-important show/hide state.
Your RadGrid code goes something like this:
LoadClientState ->
if (clientState.ContainsKey("showedColumns")) ->
control.GetColumn(columnUniqueName).Display = true; <-- just ignore this if not found - also on the others like hide, resize etc.
Thank you!... +1 for making this html editor a MD flavor instead :)
/Anders
When I try to set the Skin to Material I obtain the following Error:
WebResource.axd?d=e4b2sCc8Q8M6A2MgSsDltOpyL908K1Q7T29bPdSz7Supj8wwNwBiCRISuCJlWYcTaJsmG21ZOfynS4jGurXXbpli-ERqUAuqN0-JIBovYD49aTvhGO3Rn_RCmsSdUlmwuseC48k3n557KQEGgkr2hCHOsY41&t=638423073240000000] DETAILS: System.Web Exception: msg:Richiesta webresource non valida.
The problem happens when the ButtonType="ImageButton" is set with the Material skin:
<telerik:GridEditCommandColumn ButtonType="ImageButton" HeaderStyle-Width="20px" >
</telerik:GridEditCommandColumn>
<telerik:GridButtonColumn ButtonType="ImageButton" UniqueName="DeleteColumn" Text="Elimina" HeaderStyle-Width="20px" CommandName="Delete" ConfirmText="Procedere con la cancellazione del Cimitero?"></telerik:GridButtonColumn>
Found an additional issue when implementing this on a project:
When aria-enabled=true and we follow their instructions if we have a gridnumericcolumn in the grid, then we get a finding that "Elements must only use supported ARIA attributes" because To solve this problem, you need to fix the following:
ASPX
<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False" AllowFilteringByColumn="true" OnNeedDataSource="RadGrid1_NeedDataSource" EnableAriaSupport="true">
<ClientSettings>
<ClientEvents OnGridCreated="OnGridCreated" />
</ClientSettings>
<MasterTableView>
<Columns>
<telerik:GridBoundColumn DataField="ID" HeaderText="ID" UniqueName="ID" />
<telerik:GridBoundColumn DataField="Name" HeaderText="Name" UniqueName="Name" />
<telerik:GridCheckBoxColumn DataField="IsActive" HeaderText="Active" UniqueName="IsActive" />
<telerik:GridNumericColumn DataField="Score" HeaderText="Score" UniqueName="Score" DataType="System.Int32" DataFormatString="{0:N0}" />
</Columns>
</MasterTableView>
</telerik:RadGrid>
ASPX.CS
protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
// Creating a dummy data source
var data = new List<DummyData>
{
new DummyData { ID = 1, Name = "John Doe", IsActive = true, Score = 88 },
new DummyData { ID = 2, Name = "Jane Doe", IsActive = false, Score = 92 }
};
RadGrid1.DataSource = data;
}
public class DummyData
{
public int ID { get; set; }
public string Name { get; set; }
public bool IsActive { get; set; }
public int Score { get; set; }
}
You can workaround this issue with the following CSS rule. <style> div.RadGrid .t-font-icon{ font: 16px/1 "TelerikWebUI"; } </style>
It becomes hard to see the checked checkboxes because of the selected color it has by default matches the select color of the grid Solution: .RadGrid_BlackMetroTouch .rgSelectedRow .RadCheckBox.RadButton_BlackMetroTouch .rbToggleCheckboxChecked::before, .RadGrid_Bootstrap .rgSelectedRow .RadCheckBox.RadButton_Bootstrap .rbToggleCheckboxChecked::before, .RadGrid_Metro .rgSelectedRow .RadCheckBox.RadButton_Metro .rbToggleCheckboxChecked::before, .RadGrid_MetroTouch .rgSelectedRow .RadCheckBox.RadButton_MetroTouch .rbToggleCheckboxChecked::before { color: white; } .RadGrid_Glow .rgSelectedRow .RadCheckBox.RadButton_Glow .rbToggleCheckboxChecked::before, .RadGrid_Office2010Black .rgSelectedRow .RadCheckBox.RadButton_Office2010Black .rbToggleCheckboxChecked::before, .RadGrid_Telerik .rgSelectedRow .RadCheckBox.RadButton_Telerik .rbToggleCheckboxChecked::before, .RadGrid_WebBlue .rgSelectedRow .RadCheckBox.RadButton_WebBlue .rbToggleCheckboxChecked::before { color: black; } Sample to reproduce the behavior and compare the default colors in other states/cases: <telerik:RadCheckBox runat="server" ID="rcb1"></telerik:RadCheckBox> <br /> <telerik:RadCheckBox runat="server" ID="rcb2" Checked="true"></telerik:RadCheckBox> <telerik:RadSkinManager runat="server" ID="RadSkinManager1" Skin="Bootstrap" ShowChooser="true"> </telerik:RadSkinManager> <telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" DecoratedControls="All" RenderMode="Lightweight" /> <asp:CheckBox ID="Checkbox1" Text="some checkbox" runat="server" /> <telerik:RadGrid ID="RadGrid1" runat="server" OnNeedDataSource="RadGrid1_NeedDataSource" RenderMode="Lightweight"> <MasterTableView> <Columns> <telerik:GridClientSelectColumn></telerik:GridClientSelectColumn> <telerik:GridTemplateColumn HeaderText="rad check box column"> <ItemTemplate> <telerik:RadCheckBox runat="server" ID="RadCheckBox1"></telerik:RadCheckBox> <br /> <telerik:RadCheckBox runat="server" ID="RadCheckBox2" Checked="true"></telerik:RadCheckBox> </ItemTemplate> </telerik:GridTemplateColumn> </Columns> </MasterTableView> <ClientSettings> <Selecting AllowRowSelect="true" /> </ClientSettings> </telerik:RadGrid> And a dummy data source that is not a good data source in general, but it will suffice to get this running so one can observe protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e) { (sender as RadGrid).DataSource = "abcdef"; }
Hi,
How can I translate the "clear" button in the mobile Filter Window? I manage to translate everything in that window except the clear button:
King regards
Blas González
HeaderContextMenu filter functions such as "GreaterThanOrEqualTo", "LessThanOrEqualTo" are not working.
This issue happens with the Header Context Menu. The following scenarios are affected:
Hi Team Telerik, i found a bug in RadGrid. This one only appears in Chrome Webbrowser. Columnresizing only works once per column in chrome. You can see it right the way in your demo-site. Go to the Resizing Demopart and resize one column. Now try to re-resize it. It wont work. Best wishes Philipp