0 answers

1 view

ScriptResource.axd "Invalid character" in Encompass Desktop embedded browser with Q1 2025 (2025.4.1210.462) - ES6 syntax in RadGrid scripts?

After upgrading from 2019 to 2025.4.1210.462, I am experiencing a JavaScript error when my ASP.NET Web Forms application is opened from Encompass Desktop (embedded browser). The same pages work in modern browsers (Chrome/Edge), but fail inside Encompass.

Environment
Product: Telerik UI for ASP.NET AJAX
Version: 2025.4.1210.462
.NET Framework: 4.8
App type: ASP.NET Web Forms
IIS: Integrated pipeline
Host path: /DocPrep/
Controls used: RadScriptManager, RadAjaxManager, RadGrid, RadComboBox, RadAjaxPanel, etc.
Entry page from Encompass: Validation.aspx (standalone page, not using a master page)
Telerik CDN: Disabled
RadScriptManager: EnableScriptCombine="false"

Error
When opening DocPrep from Encompass Desktop, users see:

An error has occurred in the script on this page.

Line: 1
Char: 173461
Error: Invalid character
Code: 0
URL: /DocPrep/ScriptResource.axd?d=...

What we found
When inspecting the script response, we see modern JavaScript syntax that appears incompatible with the Encompass embedded browser (IE-like engine), for example:

_renderActiveItemStyle:function(e){
var t=this.get_owner().get_id(),
i=`${t}_ActiveItemStyle`;
...
e=e.replaceAll(";"," !important;");
...
}

It looks like ES6 template literals and replaceAll() are causing a parse error in the embedded browser.

Questions
1) Is Q1 2025 officially unsupported in Internet Explorer/embedded WebBrowser-style hosts such as Encompass Desktop?
2) Is the _renderActiveItemStyle function with template literals expected in Q1 2025 RadGrid scripts?
3) Is there any supported configuration to serve IE-compatible JavaScript while staying on Q1 2025?
e.g. OutputCompression, CDN, RenderMode, legacy script bundle, etc.
4) If not, what is the recommended Telerik version for IE/embedded browser scenarios - is R3 2022 SP1 (2022.3.1109) the last supported release?

Ajax

AjaxLoadingPanel

AjaxPanel

Grid

ScriptManager and StyleSheetManager

asked on 17 Jun 2026

0 answers

1 view

ScriptResource.axd "Invalid character" in Encompass Desktop embedded browser with Q1 2025 (2025.4.1210.462) - ES6 syntax in RadGrid scripts?

After upgrading from 2019 to 2025.4.1210.462, I am experiencing a JavaScript error when my ASP.NET Web Forms application is opened from Encompass Desktop (embedded browser). The same pages work in modern browsers (Chrome/Edge), but fail inside Encompass.

Environment
Product: Telerik UI for ASP.NET AJAX
Version: 2025.4.1210.462
.NET Framework: 4.8
App type: ASP.NET Web Forms
IIS: Integrated pipeline
Host path: /DocPrep/
Controls used: RadScriptManager, RadAjaxManager, RadGrid, RadComboBox, RadAjaxPanel, etc.
Entry page from Encompass: Validation.aspx (standalone page, not using a master page)
Telerik CDN: Disabled
RadScriptManager: EnableScriptCombine="false"

Error
When opening DocPrep from Encompass Desktop, users see:

An error has occurred in the script on this page.

Line: 1
Char: 173461
Error: Invalid character
Code: 0
URL: /DocPrep/ScriptResource.axd?d=...

What we found
When inspecting the script response, we see modern JavaScript syntax that appears incompatible with the Encompass embedded browser (IE-like engine), for example:

_renderActiveItemStyle:function(e){
var t=this.get_owner().get_id(),
i=`${t}_ActiveItemStyle`;
...
e=e.replaceAll(";"," !important;");
...
}

It looks like ES6 template literals and replaceAll() are causing a parse error in the embedded browser.

Questions
1) Is Q1 2025 officially unsupported in Internet Explorer/embedded WebBrowser-style hosts such as Encompass Desktop?
2) Is the _renderActiveItemStyle function with template literals expected in Q1 2025 RadGrid scripts?
3) Is there any supported configuration to serve IE-compatible JavaScript while staying on Q1 2025?
e.g. OutputCompression, CDN, RenderMode, legacy script bundle, etc.
4) If not, what is the recommended Telerik version for IE/embedded browser scenarios - is R3 2022 SP1 (2022.3.1109) the last supported release?

ScriptManager and StyleSheetManager

UI for ASP.NET AJAX in ASP.NET MVC

asked on 17 Jun 2026

2 answers

94 views

Getting 302 redirect to Login Page when trying to upload file on Telerik.Web.UI.WebResource.axd endpoint

Hey all!

I'm currently testing our production system at our lab, version of Telerik UI is 2012.2.607.40.
When trying to upload file using the Telerik.Web.UI.WebResource.axd?type=rau endpoint, I'm getting a 302 status code redirect to our app's login page.
What is wrong here?

Thanks all,
john

Documentation and Tutorials

Installer and VS Extensions

Persistence Framework

ScriptManager and StyleSheetManager

Security

Sharepoint Integration

UI for ASP.NET AJAX in ASP.NET MVC

Upload (Obsolete)

Visual Style Builder

WebParts for SharePoint

Window

XmlHttpPanel

answered on 01 Apr 2026

1 answer

114 views

difficulty in RadDatePicker responsiveness

As you can see from the image, on mobile devices the date ends up breaking and making it impossible to view it completely.

This is my code:
<div class="col-xl-3 col-sm-6 col-md-6 col-xs-12 mb-2">
<span class="EstiloLabelSimples">Data Vencimento:</span>
<telerik:RadDatePicker RenderMode="Lightweight" ID="txtDataVencimentoCadastro" Width="100%" runat="server" />
</div>

I've tried using other RenderMode types, but none of them worked. Could someone help me achieve this responsiveness?

UI for ASP.NET AJAX in ASP.NET MVC

Window

answered on 07 Aug 2025

6 answers

206 views

[Solved] RenderMode Inline ignored for panel with multiple controls

Good afternoon,

I am using ASP.NET AJAX version 2023.3.1010.45,

I have a page with a ComboBox and Grid. By choosing an Item in the ComboBox and clicking a Button, it will locate the Item in the Grid. If an Item is inserted into or deleted from the Grid, the ComboBox needs to update. Both controls have the same ObjectDataSource as their data source. This is why they share an Ajax Panel.

I am using a RadAjaxManager and RadAjaxLoadingPanel as follows (setting UpdatePanelsRenderMode to Inline):

    <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" UpdatePanelsRenderMode="Inline">
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="RadComboItems">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadGridItems"/>
                    <telerik:AjaxUpdatedControl ControlID="RadComboItems" />
                </UpdatedControls>
            </telerik:AjaxSetting>
            <telerik:AjaxSetting AjaxControlID="RadGridItems">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadGridItems" />
                    <telerik:AjaxUpdatedControl ControlID="RadComboItems" />
                </UpdatedControls>
            </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManager>
    <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" Skin="Default" BackgroundTransparency="30" RenderMode="Lightweight">
    </telerik:RadAjaxLoadingPanel>

The ComboBox and Grid appear in the same RadAjaxPanel (also with RenderMode Inline):

<telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" LoadingPanelID="RadAjaxLoadingPanel1" RenderMode="Inline">
    <label for="RadComboItems">Input/Select Item:</label>
    <telerik:RadComboBox ID="RadComboItems" runat="server" Height="200px" Width="200px" DataSourceID="odsItems" EnableVirtualScrolling="true" DataTextField="ItemId" DataValueField="RowNum" EmptyMessage="--Select a value--" RenderMode="Lightweight" EnableAjaxSkinRendering="true">
    </telerik:RadComboBox>
    <telerik:RadButton RenderMode="Lightweight" runat="server" Text="Select" ID="btnFindItems" OnClick="btnFindItems_Click" EnableAjaxSkinRendering="true" />

    <telerik:RadGrid ID="RadGridItems" RenderMode="Lightweight" runat="server" AllowPaging="True" DataSourceID="odsItems" AllowSorting="True" AllowAutomaticUpdates="True" AllowAutomaticInserts="True" AllowAutomaticDeletes="True" OnUpdateCommand="RadGridItems_UpdateCommand"                                    OnItemDataBound="RadGridItems_ItemDataBound" OnItemCommand="RadGridItems_ItemCommand" OnItemDeleted="RadGridItems_ItemDeleted" OnItemInserted="RadGridItems_ItemInserted" OnItemUpdated="RadGridItems_ItemUpdated" OnPreRender="RadGridItems_PreRender" CellSpacing="-1" GridLines="Horizontal" OnDetailTableDataBind="RadGridItems_DetailTableDataBind" AllowFilteringByColumn="true" OnInfrastructureExporting="RadGridItems_InfrastructureExporting">
....
....
    </telerik:RadGrid>
</telerik:RadAjaxPanel>

When the page first renders, the ComboBox and Button render as expected:

<div class="RadAjaxPanel" id="ctl00_maincontent_ctl00_maincontent_RadComboItemsPanel" style="display: inline;">

Once the Button is pressed though, the rendering changes to Block:

<div class="RadAjaxPanel" id="ctl00_maincontent_ctl00_maincontent_RadComboItemsPanel">

Is there anyway to prevent this from happening, without having to specify this on the page:

    <style type="text/css">
        .RadAjaxPanel
        {
            display: inline !important;
        }
    </style>

Kind regards,

Richard

AjaxLoadingPanel

AjaxPanel

ComboBox

answered on 06 Nov 2024

0 answers

132 views

HierarchyLoadMode = "Conditional" Row Selection Not Added to RadGrid SelectedItems

I have a Telerik RadGrid that has a DetailTable that can be expanded by the user. The DetailTable contains several selectable rows. The user is able to select some rows, then click a "Process Data" button that saves the row data in a Visual Basic code-behind file.

The RadGrid uses HierarchyLoadMode="conditional" to keep track of the DetailTable.

Two Problems-

1. When a user:
- expands the DetailTable,
- selects a row,
- collapses the DetailTable,
- clicks "Process Data,"
no data is saved because RadGrid.SelectedItems has 0 items. Even though the selected row is shown as selected in the UI.

However, if a user:
- selects a row,
- collapses the detail table,
- clicks "Process Data" + gets an error from the VB saying "No rows selected,"
- expands the detail table again,
- selects the row again,
- clicks "Process Data" again,
then the data will be saved because RadGrid.SelectedItems will include the row. Perhaps this is a bug?

In other words, a post back is needed to clear the detail table selections before RadGrid.SelectedItems actually includes items that have been selected in a collapsed HierarchyLoadMode="conditional" table.

2. Is there a way to have selections persist across pagination? Eg. If the user expands the DetailTable, selects a row, navigates to "page 2" of the detail table, then navigates back to "page 1," their selection is not saved.

Ajax

AjaxPanel

Grid

asked on 25 Mar 2024

0 answers

228 views

How to prevent UI elements from improperly rendering on page load on mobile website?

I am creating a mobile website using radcomboboxes inside of update controls that are set to autopostback = true. All of the controls work except on the page's initial load the UI elements are enlarged and look more like buttons. They are still able to be selected and after the controls postback the elements still do not go back to a normal size. Only after a postback from another control do the UI elements shrink down to a normal size.

I have tested the radcombobox with checkboxes enabled outside of the update panel and this behavior does not change. I have a master page that contains jQuery files located in the header, and when I remove one of the js files, the problem disappears with the UI elements disappearing. Can anyone help me figure out what is preventing the UI elements from rendering properly?

On Load:

After postback:

UI for ASP.NET AJAX in ASP.NET MVC

asked on 22 Sep 2023

0 answers

1.1K+ views

"System.ArgumentException: Illegal characters in path" Exception!

Hi,

I'm getting the following exception multiple time throughout the application in error log. It's very difficult to identify the exact reason for exception occurrence as the application is vast to debug in depth. Also, I'm using Telerik Control as well as Telerik Reporting in multiple place in the application. The version of Telerik.Web.UI which I am currently using is 2023.1.323.45

EXCEPTION URL :

https://adba.roc-p.com:443/Telerik.Web.UI.WebResource.axd?type=rau

EXCEPTION MESSAGE :

System.ArgumentException: Illegal characters in path. at System.IO.Path.CheckInvalidPathChars(String path, Boolean checkAdditional) at System.IO.Path.GetExtension(String path) at Telerik.Web.UI.AsyncUploadHandler.ProcessUploadedFile() at Telerik.Web.UI.HandlerRouter.ProcessHandler(String handlerKey, HttpContext context) at Telerik.Web.UI.WebResource.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Can anyone please provide all the possible reason behind this exception along with its step to resolve. Any help will be highly appreciated!

NOTE :

I have already visited multiple forum in which it is mentioned that this issue occurs in the previous version of the Telerik.Web.UI. Please confirm whether the exception mentioned above still exist in the version of Telerik.Web.UI which I am currently using i.e. 2023.1.323.45. And If not then please provide the possible reason that we need to verify on our end.

Ajax

AjaxPanel

asked on 30 May 2023

0 answers

189 views

The radgrid table is disappears when choosing a value for any filter on radgrid

Please help me to search the error ,

the radgrid table disappear after filtering the search,
I tried to find any solution a lot but i did not find a solution for this problem

aspx code :

    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">
    </telerik:RadAjaxLoadingPanel>


 <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" >
                                        <AjaxSettings>
                                            <telerik:AjaxSetting AjaxControlID="RadGrid1">
                                                <UpdatedControls>
                                                    <telerik:AjaxUpdatedControl ControlID="RadGrid1" />
                                                    <telerik:AjaxUpdatedControl ControlID="RadGrid2" />
                                                    <telerik:AjaxUpdatedControl ControlID="RadGrid3" />
                                                    <telerik:AjaxUpdatedControl ControlID="RadGrid4" />
                                                </UpdatedControls>
                                            </telerik:AjaxSetting>
                                        </AjaxSettings>
                            </telerik:RadAjaxManager>
                                    

                            <telerik:RadGrid EnableAriaSupport="true" ID="RadGrid1" runat="server" AllowPaging="true" AllowSorting="true" PageSize="20" ShowStatusBar="true"
                                 CellSpacing="0" GridLines="None" ClientSettings-EnablePostBackOnRowClick="false" AllowFilteringByColumn="True">
                                <MasterTableView AutoGenerateColumns="false" TableLayout="Fixed" DataKeyNames="REQ_ID" >
                                    <HeaderStyle HorizontalAlign="Center" ForeColor="#009900" Font-Names="Arial" Font-Bold="true" Font-Size="Medium" Height="50px"/>
                                    <Columns>
                                        <telerik:GridMaskedColumn DataField="REQ_ID" HeaderText="رقم الطلب" UniqueName="Req_num_r1" Visible="true" AllowFiltering="false">
                                        </telerik:GridMaskedColumn>
                                        <telerik:GridBoundColumn DataField="EMP_NAME" HeaderText="اسم الموظف/ طالب الخدمة" AllowFiltering="true"  UniqueName="EMP_NAME_ra" Visible="true" HeaderStyle-Width="15%">
                                        </telerik:GridBoundColumn>
                                        <telerik:GridBoundColumn DataField="NAME" HeaderText="الخدمة المقدمة" UniqueName="Problem_Name_r1" Visible="true" ColumnGroupName="GeneralInformation">
                                            <FilterTemplate>
                                                <telerik:RadComboBox RenderMode="Lightweight" ID="Problem_NameCombo1" SelectedValue='<%# ((GridItem)Container).OwnerTableView.GetColumn("Problem_Name_r1").CurrentFilterValue %>'
                                                    runat="server" OnClientSelectedIndexChanged="Problem_NameComboIndexChanged1" AutoPostBack="true">
                                                    <Items>
                                                        <telerik:RadComboBoxItem Text="All" Value="" />
                                                        <telerik:RadComboBoxItem Text="مشكلة في الطباعة" Value="مشكلة في الطباعة" />
                                                        <telerik:RadComboBoxItem Text="سكانر" Value="سكانر" />
                                                        <telerik:RadComboBoxItem Text="مشكلة في الشبكة" Value="مشكلة في الشبكة" />
                                                        <telerik:RadComboBoxItem Text="البريد الحكومي" Value="البريد الحكومي" />
                                                        <telerik:RadComboBoxItem Text="الارشيف" Value="الارشيف" />
                                                        <telerik:RadComboBoxItem Text="موارد" Value="موارد" />
                                                        <telerik:RadComboBoxItem Text="الانترنت" Value="الانترنت" />
                                                        <telerik:RadComboBoxItem Text="جهاز الحاسوب" Value="جهاز الحاسوب" />
                                                        <telerik:RadComboBoxItem Text="حزمة الاوفيس" Value="حزمة الاوفيس" />
                                                        <telerik:RadComboBoxItem Text="موقع الديوان" Value="موقع الديوان" />
                                                    </Items>
                                                </telerik:RadComboBox>
                                                <telerik:RadScriptBlock ID="RadScriptBlock1" runat="server">
                                                    <script type="text/javascript">
                                                        function Problem_NameComboIndexChanged1(sender, args) {
                                                            var tableView = $find("<%# ((GridItem)Container).OwnerTableView.ClientID %>");
                                                            tableView.filter("Problem_Name_r1", args.get_item().get_value(), "EqualTo");
                                                        }
                                                    </script>
                                                </telerik:RadScriptBlock>
                                            </FilterTemplate>
                                        </telerik:GridBoundColumn>
                                        <telerik:GridDateTimeColumn DataField="CREATE_DATE" ItemStyle-CssClass="sm-visible" HeaderText="وقت انشاء الطلب" DataFormatString="{0:g}" UniqueName="Create_date_r1">
                                        </telerik:GridDateTimeColumn>
                                        <telerik:GridBoundColumn DataField="provider" HeaderText="مقدم الخدمة" UniqueName="provider_r1" HeaderStyle-Width="20%">
                                        </telerik:GridBoundColumn>
                                        <telerik:GridDateTimeColumn DataField="END_DATE" HeaderText="وقت تنفيذ الطلب" DataFormatString="{0:g}" UniqueName="END_DATE_r1" Visible="true">
                                        </telerik:GridDateTimeColumn>
                                        <telerik:GridMaskedColumn DataField="Responsiveness" HeaderText="سرعة الانجاز" UniqueName="Responsiveness_r1" AllowFiltering="false">
                                        </telerik:GridMaskedColumn>


                                    </Columns>

                                    <NestedViewTemplate>

                                        <div class="Table" style="background-color: #a7d1e2">

                                            <div class="TableRow col-12">
                                                <div class="TableCell p-3" style="inline-size: 100%; overflow-wrap: break-word;"><b class="text-danger">تفاصيل المشكلة : </b><%# Eval("DESCRIPTION") %> </div>
                                                <div class="TableCell p-2" style="inline-size: 100%; overflow-wrap: break-word;"><b class="text-danger">ملاحظات مقدم الخدمة : </b><%# Eval("NOTE") %> </div>
                                                <div class="TableCell p-2">
                                                    <b class="text-danger">تقييم الخدمة  : 
                                                          <div class="progress-bar" role="progressbar" style="width:100px ;" aria-valuenow='<%# Convert.ToDouble(Eval("FEEDBACK_RATING"))*20 %>' aria-valuemin="0" aria-valuemax="100"><%# Convert.ToDouble(Eval("FEEDBACK_RATING"))*20 %> %</div>

                                                    </b>

                                                </div>
                                            </div>

                                        </div>

                                    </NestedViewTemplate>
                                </MasterTableView>
                                <ClientSettings>
                                    <DataBinding SelectMethod="GetDataAndCount">
                                    </DataBinding>
                                </ClientSettings>
                            </telerik:RadGrid>

asked on 23 May 2023

0 answers

179 views

Telerik UI for ASP.NET AJAX (2010.1519) using lower version of jQuery

Dear Telerik Team,

We have purchased Telerik UI for ASP.NET AJAX UI 2010.1519. Now we are facing vulnerable issues as it is using jQuery 1.4.2.

One of the Telerik doc tells that

When Telerik upgraded jQuery version to 3.3.1, it faces incompatibilities with the MS AJAX framework and its __doPostBack() method. Due to which, Telerik downgraded jQuery version Telerik UI for ASP.NET AJAX R1 2019 - present are using a modified jQuery version 1.12.4 that includes security vulnerability backport fixes.

Is there a fix to overcome this issue other than upgrading the Telerik version to 2019 or greater?

asked on 08 May 2023