
<httpHandlers>
<add path="Telerik.Web.UI.DialogHandler.aspx" verb="*"
type="Telerik.Web.UI.DialogHandler, Telerik.Web.UI,
Version=2007.2.918.0, Culture=neutral, PublicKeyToken=121fae78165ba3d4"
validate="false" />
</httpHandlers>
Note that if you use newer Telerik.Web.UI assembly, you might need to update its version (highlighted above).
To make the job easier, RadEditor Prometheus has a verb for adding this setting in its smart tag (it is shown only if the setting is not already present):
I hope this helps,
Valeri Hristov
13 Answers, 1 is accepted

<add verb="*" path="Telerik.Web.UI.DialogHandler.aspx" type="Telerik.Web.UI.DialogHandler"/>
i.e. leave out the version and token. Does that work?

Regards,
Valeri Hristov (Senior Developer, MCSD)
the Telerik team
Instantly find answers to your questions at the new Telerik Support Center

My editor stopped working. Here is the handler section of my web.config:
<handlers>
<remove name="WebServiceHandlerFactory-Integrated"/>
<remove name="ScriptHandlerFactory"/>
<remove name="ScriptHandlerFactoryAppServices"/>
<remove name="ScriptResource"/>
<add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add path="Telerik.Web.UI.DialogHandler.aspx" verb="*" type="Telerik.Web.UI.DialogHandler, Telerik.Web.UI, Version=2007.2.918.0, Culture=neutral, PublicKeyToken=121fae78165ba3d4" validate="false" />
<add path="Telerik.RadUploadProgressHandler.aspx" verb="*" type="Telerik.WebControls.RadUploadProgressHandler, RadUpload.Net2"/>
</handlers>
It is also showing an error that there is no name, and validate is undeclared.
The problem is fixed in the "futures" build of RadControls "Prometheus", available for download under your Client.net account.
If you have enough time, you can wait for the official release of RadControls "Prometheus" Q3, scheduled for the beginning of next week.
Kind regards,
Rumen
the Telerik team
Instantly find answers to your questions at the new Telerik Support Center

Will the treeview be included as stated in your roadmap?
Regards Pelle
The release is scheduled for Wednesday and it will include the RadTreeView "Prometheus" control as well.
Kind regards,
Rumen
the Telerik team
Instantly find answers to your questions at the new Telerik Support Center



The smart tag will not appear if the SpellCheckHandler and DialogHandler handlers are already registered in the web.config file, e.g.
<httpHandlers>
<remove path="*.asmx" verb="*" />
<add path="Telerik.Web.UI.DialogHandler.aspx" verb="*" type="Telerik.Web.UI.DialogHandler, Telerik.Web.UI, Version=2007.3.1218.20, Culture=neutral, PublicKeyToken=121fae78165ba3d4"
validate="false" />
<add path="Telerik.Web.UI.SpellCheckHandler.axd" verb="*" type="Telerik.Web.UI.SpellCheckHandler, Telerik.Web.UI, Version=2007.3.1218.20, Culture=neutral, PublicKeyToken=121fae78165ba3d4"
validate="false" />
</httpHandlers>
If your scenario is other, please provide more information how to reproduce the problem. You can open a support ticket and send a sample working project that we can test. We will examine it and see what is causing the problem. After that we will do our best to provide a solution.
Best regards,
Rumen
the Telerik team
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I have upgraded the telerik dll version 2013. I enabled the smart tag it automatically written web.config entry.
Everything working fine in dev environment, I updated web.config entry in test server
but when i click on hyperlink i got web.config entry is missing from browser. Please advise what i am missing.
thanks
Nirmala
The following help article provides guidance how to solve the reported problem:
Error: Web.config registration missing! The Telerik dialogs require a HttpHandler registration in the web.config file.
Kind regards,
Rumen
the Telerik team