Migrating VS 2008 to VS 2019

[Abhishek]

Hi Team,

We have legacy application which is currently running in Visual studio 2008. As EOL of VS 2008 we started to build the application in VS 2019 with .net framework 3.5.

Currently we are using RAD control which have separate dll for each control like RadEditor.Net2.dll, RadPanelbar.Net2.dll, RadWindow.Net2.dll 

as well as Telerik UI with Telerik.Web.UI.dll (version 2008.02.0826) 

 

Problem statement:-

While migrating application from VS2008 to VS2019 we are facing below error while debugging locally.

Uncaught Error: Unexpected ajax response was received from the server. This may be caused by one of the following reasons: - Server.Transfer. - Custom http handler. - Incorrect loading of an "Ajaxified" user control. Verify that you don't get a server-side exception or any other undesired behavior, by setting the EnableAJAX property to false. at _1.CheckContentType (WebResource.axd?d=HD…303186005099:1616:7) at _1.HandleAsyncRequestResponse (WebResource.axd?d=HD…303186005099:1385:8) at _4e.onreadystatechange (WebResource.axd?d=HD…9303186005099:433:4)

we are using rad:RadAjaxManager in our aspx page. 

by adding this property to the manager ajax mechanism will not work and page start post back in each call.

 

Any other solution do you have to overcome this.