Exception Telerik.Web.UI.DialogHandlerNoSession

[Naveed]

Please see attached screen shots for exception details and aspx page control where exception is raised.

 

Steps to reproduce exception:

I have Telerik rich text editor on aspx page in update mode, so text is loaded from DB and I can edit and save it.When I click Find Replace button with Binoculars icon in screen shot, the find replace popup appears fine but exception is raised in Prefix and Retrace tools by Stackify.

Any ideas? Thanks.

[Rumen]

Hi Naveed,

Do you experience this problem with other dialogs like the Image Manager?

If it applies only to the Find and Replace dialog, can you please tell me whether it is customized? ? RadEditor offers the ability to customize its built-in dialogs by setting the ExternalDialogsPath property to point to a folder containing its external dialog files that allows their customization? If yes, you will need to update the FindAndReplace.ascx file from the same installation as the Telerik.Web.UI.dll and to customize it from scratch.

If the dialog is not customized/modified please provide a simple working project which demonstrates the problem and I will examine the error locally.

 

Regards,
Rumen
Progress Telerik

[Naveed]

Hi Rumen,

 

Let me look into your post and examine my project in detail. Thanks.

[Rumen]

Please take your time, Naveed!

It will be great if you could provide any reproduction steps or a simple runnable project which demonstrates the issue.

 

Regards,
Rumen
Progress Telerik

[Naveed]

I have created a sample application and now its giving another error and not opening the dialog box when I click on Find and Replace in telerik:RadEditor control. I have also placed handlers in config file still it is not opening. Please download the sample application.

Download Link:
http://www.mediafire.com/file/na04doux38b309o/Sample+APP.zip/file

 

[Rumen]

Hi Naveed,

The problem is due to the routing and especially this line:

settings.AutoRedirectMode = RedirectMode.Permanent;

which breaks the dialog handler responsible for the RadEditor dialog.

The problem is discussed in this KB article - https://www.telerik.com/support/kb/aspnet-ajax/editor/details/error-web-config-registration-missing!-the-telerik-dialogs-require-a-httphandler-registration-in-the-web-config-file-. 

The solution is to exclude the Telerik.Web.UI.DialogHandler.aspx handler from the routing.

<telerik:RadEditor RenderMode="Lightweight" runat="server" ID="RadEditor1" DialogHandlerUrl="~/Telerik.Web.UI.DialogHandler.axd" SkinID="BasicSetOfTools" Width="800px" >

   <system.web>
    <compilation debug="true" targetFramework="4.7.2" />
    <httpRuntime targetFramework="4.7.2" />
    <pages>
      <namespaces>
        <add namespace="System.Web.Optimization" />
      </namespaces>
      <controls>
        <add assembly="Microsoft.AspNet.Web.Optimization.WebForms" namespace="Microsoft.AspNet.Web.Optimization.WebForms" tagPrefix="webopt" />
      </controls>
    </pages>
    <httpHandlers>
      <add path="Telerik.Web.UI.DialogHandler.axd" type="Telerik.Web.UI.DialogHandler" verb="*" validate="false" />
      <add path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" validate="false" />
    </httpHandlers>
  </system.web>

 <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
    <handlers>
      <add name="Telerik_Web_UI_DialogHandler_aspx" verb="*" preCondition="integratedMode" path="Telerik.Web.UI.DialogHandler.axd" type="Telerik.Web.UI.DialogHandler" />
      <add name="Telerik_Web_UI_WebResource_axd" verb="*" preCondition="integratedMode" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" />
    </handlers>
  </system.webServer>

Regards,
Rumen
Progress Telerik