Problems with Gantt_ASP Ajax

In IE10 and IE11 the coordinate system is all of a sudden in float numbers and not in integer as in all other browsers.

The AjaxControlToolkit has a GetElementPosition call deep down in it Common namespace that does some error checking.

The error checking it does is partly to verify that the coordinates it gets is of type integer – in IE10 and IE11 the will not be integers. Hence exceptions.

The error checking is only in effect when you have the scriptmanager in debug mode.

So to fix the errors you must do this:

          <asp:ToolkitScriptManager ID="ToolkitScriptManager2" runat="server" 
                 CombineScripts="False" ScriptMode="Release">
            <Scripts>        
              <asp:ScriptReference Name="Common.Common.js" Assembly="AjaxControlToolkit"  />
              <asp:ScriptReference Name="Compat.DragDrop.DragDropScripts.js" Assembly="AjaxControlToolkit"  />
              <asp:ScriptReference Name="PlexityHideAjax.Gantt_AjaxBehavior.js" Assembly="PlexityHideAjax"  />
            </Scripts>
          </asp:ToolkitScriptManager>

Once you have done this – the moving of time items from client side works just fine once again.