This sticky thread lists known issues and breaking changes introduced in the UI for ASP.NET AJAX releases.

• Q3 2011 (Version number: 2011.3.1115)
• Q1 2013 (Version number: 2013.1.220)
• Q2 2013 (Version number: 2013.2.611)
• Q2 2013 SP1 (Version number: 2013.2.717)
• Q3 2013 (Version number: 2013.3.1015)
• Q1 2014 (Version number: 2014.1.225)
• Q2 2014 (Version number: 2014.2.618)
• Q3 2014 (Version number: 2014.3.1024)
• Q1 2015 (Version number: 2015.1.225)
• Q2 2015 (Version number 2015.1.623)
  
• Q2 2015 SP1 (Version number: 2015.2.729)
• Q3 2015 SP1 (Version number: 2015.3.1111)
• Q1 2016 (Version number: 2016.1.113)
• Q1 2016 SP1 (Version number: 2016.1.225)
• R2 2016 (Version number: 2016.2.504)
• R2 2016 SP1 (Version number: 2016.2.607)
• R3 2016 (Version number: 2016.3.914)
• R3 2016 SP1 (Version number: 2016.3.1018) 
• R1 2017 (Version number: 2017.1.118)
• R1 2017 SP1 (Version number: 2017.1.228)
• R2 2017 (Version number: 2017.2.503)
• R2 2017 SP2 (Version number: 2017.2.711)
• R3 2017 (Version number: 2017.3.913)
• R1 2018 (Version number: 2018.1.117)
• R2 2018 (Version number: 2018.2.516)
• R2 2018 SP1 (Version number: 2018.2.710)
• R3 2018 (Version number 2018.3.910)
• R1 2019 (Version number: 2019.1.115)
• R3 2019 (Version number: 2019.3.916)
• R1 2020 (Version number: 2020.1.114)
• R3 2020 SP1 (Version number: 2020.3.1021)
• R1 2021 SP1 (Version number: 2021.1.224)
• R2 2021 (Version number: 2021.2.511)
• R2 2021 SP1 (Version number: 2021.2.616)
• R3 2021 (Version number: 2021.3.914)
• R3 2021 SP1 (Version number: 2021.3.1111)
• R2 2022 SP1 (Version number: 2022.2.622)
• R3 2022 (Version number: 2022.3.913)
• R1 2023 (Version number: 2023.1.314)
• 2024 Q1 (Version number: 2024.1.131)
• 2024 Q3 (Version number: 2024.3.805)
• 2024 Q4 (Version number: 2024.4.1113)
• 2024 Q4 (Version number: 2024.4.1114)
• 2025 Q1 (Version number: 2025.1.211)
• 2025 Q2 (Version number: 2025.2.520)
• 2025 Q3 (Version number: 2025.3.825)
• 2025 Q4 (Version number: 2025.4.1111)
• 2025 Q4 (Version number: 2025.4.1321)
• 2026 Q1 (Version number: 2026.1.211)
  

---

Q3 2011 (Version number: 2011.3.1115)

Problem: When adding items to OData-enabled controls (RadMenu, RadTreeView, RadListBox, RadComboBox) through design time erroneous markup is applied to the control:

Please note the added ODataSettings section. It will cause JavaScript errors on the page.

Solution: Remove the ODataSetting section and the issue will vanish. The problem is also fixed in the Q3 SP1 release, version number 2011.3.1305

When I run my project I'm getting this error

Could not load file or assembly 'Telerik.Web.UI' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

In my web.config I checked that the version in the web.config is the same as the version I'm using in references

<assemblyIdentity name="Telerik.Web.UI" publicKeyToken="121fae78165ba3d4" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2020.2.617.45" newVersion="2020.2.617.45" />

 

Using an Editor demo available from the demos, switch to HTML view and paste the following HTML into it:

Now, switch again to the Design mode.

Try to add some text after the "Right column..." text by placing the cursor in the end of the text, pressing enter and writing something, or just try to change that text format into an H4.

Editor will insert a new paragraph with the col-6 class and outside that DIV!

Here's the result:

How can this be fixed? Need to provide some snippets but they are unusable this way.

Thank you

Rad Editor is stuck in time. Today's web content is structured using DIVs, leaving tables for presenting data.

Examples like Telerik Web UI Editor Editable DIV Content Area Demo | Telerik UI for ASP.NET AJAX are so obsolete and shows that this control has been left behind. 

Will you ever support creating contents using DIV elements with a dialog box that allows to add CSS classes or define style settings?

 

I am filtering a grid (tableview) in javascript  to filter to a single condition. 

 

 $find(tableViewID).filter("Photo_Group", args.get_item().get_value(), "EqualTo");

 

However, where can I find how to filter to multiple conditions.  

Ie the above condition OR filter("Photo_Group", "-1", "EqualTo");

I can see how to do this using the Filtering control,  but I cannot show/use a filtering control on the page.     

Hi,

I need to restore the expanded state of a RadTreeList after a redirect. I am storing the expanded items in Session before the redirect. However, server-side expansion only expands the root, not the child items.

Can someone share a JavaScript example or approach to fully expand all previously expanded nodes by the user after a redirect using the stored session data?

If your approach works in Server Side, I will use it on my solution

Thanks team!

This is an example using server side, but it expands only the first root element (not sure why)

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using Telerik.Web.UI;

namespace SysMgmt.Groups
{
    public partial class GroupMaintenanceServer : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                RadTreeList1.NeedDataSource += RadTreeList1_NeedDataSource;
            }
        }

        protected void RadTreeList1_NeedDataSource(object sender, TreeListNeedDataSourceEventArgs e)
        {
            RadTreeList1.DataSource = GetData();
        }

        // ✅ Guardar los nodos expandidos antes del render
        protected void Page_PreRender(object sender, EventArgs e)
        {
            var expandedItems = RadTreeList1.Items
                .Where(i => i.Expanded)
                .Select(i => (int)i.GetDataKeyValue("ID"))
                .ToList();

            Session["ExpandedNodes"] = expandedItems;
        }

        protected void RadTreeList1_DataBound(object sender, EventArgs e)
        {
            if (Session["ExpandedNodes"] is List<int> expanded)
            {
                foreach (TreeListDataItem item in RadTreeList1.Items)
                {
                    int id = (int)item.GetDataKeyValue("ID");
                    if (expanded.Contains(id))
                        item.Expanded = true;
                }
            }
        }

        protected void RadTreeList1_ItemCommand(object sender, TreeListCommandEventArgs e)
        {
            if (e.CommandName == "EditItem" && e.Item is TreeListDataItem dataItem)
            {
                int id = (int)dataItem.GetDataKeyValue("ID");
                Response.Redirect($"EditPage.aspx?id={id}");
            }
        }

       
        private DataTable GetData()
        {
            DataTable table = new DataTable();
            table.Columns.Add("ID", typeof(int));
            table.Columns.Add("ParentID", typeof(int));
            table.Columns.Add("Text", typeof(string));
            table.Columns.Add("Value", typeof(string));

            // Root nodes
            table.Rows.Add(1, DBNull.Value, "Root 1", "A");
            table.Rows.Add(2, DBNull.Value, "Root 2", "B");

            // Children of Root 1
            table.Rows.Add(3, 1, "Child 1.1", "A1");
            table.Rows.Add(4, 1, "Child 1.2", "A2");

            // Children of Root 2
            table.Rows.Add(5, 2, "Child 2.1", "B1");
            table.Rows.Add(6, 2, "Child 2.2", "B2");

            // Sub-child
            table.Rows.Add(7, 3, "SubChild 1.1.1", "A1a");

            return table;
        }
    }
}

After upgrading to version 2026.1.211.462 of Telerik UI for ASP.NET AJAX , we are having a problem with the LoadSettings feature of the RadFilter.   It is generating this error for any existing filters.  We can delete and re-create filters and it seems to be find going forward but we have dozens of existing filters that will not load.

Unexpected character encountered while parsing value: . Path '', line 1, position 1.

I have a user with Win7 and IE8 who was experiencing the dreaded 'Sys' is undefined script error, when trying to load the page that has the RadEditor on it. He is running a clean install of Win7 and IE8. I was unable to reproduce this on my own clean install of Win7 and IE8.

Trythis in a dos box

regsvr32 softpub.dll
regsvr32 wintrust.dll
regsvr32 initpki.dll
regsvr32 dssenh.dll
regsvr32 rsaenh.dll
regsvr32 gpkcsp.dll
regsvr32 sccbase.dll
regsvr32 slbcsp.dll
regsvr32 cryptdlg.dll

It fixed all problems!

Language : vb

I have a table that contains a numeric field. Using this field value I generate variable numbers of CheckBoxes in a RadGrid PlaceHolder :

I am attempting reference the CheckBoxes in the selected row and do some processing if the a CheckBox is checked.

I can get the reference to the PlaceHolder : Dim phBlocksCheckBox As PlaceHolder = DirectCast(item.FindControl("phBlocksCheckBox"), PlaceHolder)

But the code to return the CheckBox reference is returning Nothing : Dim BlockCheckBox As CheckBox = DirectCast(phBlocksCheckBox.FindControl("BlockCheckBox_" & cbIndex), CheckBox)

Here is my code :

apsx :
    <div style="clear: both">
        <div style="float: right; margin-right: 10px;">
            <asp:Button ID="GenerateButton" runat="server" Text="Generate Cassette Labels" Disabled="True"/>
        </div>
    </div>

    <telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True" AllowSorting="True" GridLines="None" AllowMultiRowSelection="True" AllowFilteringByColumn="True" EnableLinqExpressions="False">
        <MasterTableView AutoGenerateColumns="False">
            <PagerStyle AlwaysVisible="True"></PagerStyle>
            <Columns>
                <telerik:GridClientSelectColumn UniqueName="checkboxColumn1" HeaderTooltip="SELECT All" ShowSortIcon="False" ShowFilterIcon="False" Reorderable="False">
                    <HeaderStyle Width="30px" />
                </telerik:GridClientSelectColumn>
                <telerik:GridBoundColumn DataField="NumberOfBlocks" HeaderText="Block Count" UniqueName="NumberOfBlocks" AllowFiltering="False" Display="False">
                    <HeaderStyle Width="20px" />
                </telerik:GridBoundColumn>
                <telerik:GridTemplateColumn DataField="Block" HeaderText="Blocks" UniqueName="Blocks" AllowFiltering="False">
                    <ItemTemplate>
                        <asp:PlaceHolder ID="phBlocksCheckBox" runat="server" />
                    </ItemTemplate>
                </telerik:GridTemplateColumn>
            </Columns>
        </MasterTableView>
    </telerik:RadGrid>


vb :
    Public dt As DataTable = Nothing
    Protected Sub RadGrid_NeedDataSource(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridNeedDataSourceEventArgs) Handles RadGrid1.NeedDataSource
        If dt Is Nothing Then
            Dim objRadGrid As RadGrid = CType(sender, RadGrid)
            Dim objCommand As New MySqlCommand
            dt = New DataTable()

 
            objCommand.CommandText = "SELECT Block AS NumberOfBlocks FROM samples"
            Call DBClass.TapDB("ConnStr", objCommand, "getRS", "", dt)

            objRadGrid.DataSource = dt
        End If
    End Sub

    Protected Sub RadGrid1_ItemDataBound(sender As Object, e As GridItemEventArgs) Handles RadGrid1.ItemDataBound
        'Ensure we are dealing with a data item (not header, footer, etc.)
        If TypeOf e.Item Is GridDataItem Then
            Dim item As GridDataItem = DirectCast(e.Item, GridDataItem)

            'Find the placeholder control defined in the ItemTemplate
            Dim phBlocksCheckBox As PlaceHolder = CType(item.FindControl("phBlocksCheckBox"), PlaceHolder)

            If phBlocksCheckBox IsNot Nothing Then
                Dim NumberOfBlocks As Integer = DataBinder.Eval(item.DataItem, "NumberOfBlocks")

                'Dynamically create and add checkboxes
                If NumberOfBlocks > 0 Then
                    For BlockIndex As Integer = 0 To NumberOfBlocks - 1
                        Dim BlockCheckBox As New CheckBox()
                        BlockCheckBox.ID = "BlockCheckBox_" & (BlockIndex + 1).ToString()
                        BlockCheckBox.Text = (BlockIndex + 1).ToString()
                        BlockCheckBox.Checked = True
                        phBlocksCheckBox.Controls.Add(BlockCheckBox)
                        phBlocksCheckBox.Controls.Add(New LiteralControl("    "))
                    Next
                End If
            End If
        End If
    End Sub


    Protected Sub Button_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles GenerateCassetteLabelsButton.Click
        Dim NumberOfBlocks As Integer = 0

        For Each item As GridDataItem In RadGrid1.SelectedItems
            NumberOfBlocks = CInt(item("NumberOfBlocks").Text)

            Dim phBlocksCheckBox As PlaceHolder = DirectCast(item.FindControl("phBlocksCheckBox"), PlaceHolder)
            If phBlocksCheckBox IsNot Nothing Then
HttpContext.Current.Response.Write("phBlocksCheckBox IsNot Nothing<br><br>")
                For cbIndex As Integer = 1 To NumberOfBlocks
HttpContext.Current.Response.Write("-BlockCheckBoxID : " & "BlockCheckBox_" & cbIndex & "<br><br>")
                    Dim BlockCheckBox As CheckBox = DirectCast(phBlocksCheckBox.FindControl("BlockCheckBox_" & cbIndex), CheckBox)

                    If BlockCheckBox IsNot Nothing Then
HttpContext.Current.Response.Write("BlockCheckBox IsNot Nothing<br><br>")
                        'Do something with BlockCheckBox.Text
HttpContext.Current.Response.Write("Block : " & BlockCheckBox.Text & "<br><br>")
                    End If
                Next
            End If
        Next

        RadGrid1.Rebind()
    End Sub

 

Hi , 

We have client facing issue where the RadTreeView control nested under RadComboBox is exceeding the popup space and having a page scroll how can i restrict it ?   Also  RadTreeview Nested under is not detecting the screen boundary and expanding the direction