4 Answers, 1 is accepted
Is it then better at them moment to use the Kendo Gantt instead? The ASP.NET control seems to be just a wrapper around it and in Kendo Gantt that function is available I think.
Indeed the control could be customized in the demonstrated manner - by disabling the inbuilt tool tip and creating a custom one on the dbclick event of certain task.
Thank you for sharing your solution with the community.