First time submitting an error report here so be gentle ;)
I've been using an old version of the ajaxcontroltoolkit with Visual Studio 12 over several years for a project at work and now have a need to use the multihandlesliderextender for a new part of the project. I dropped one into the page and set it up and eventually
got it working in the but it gave the "could not be set on property" error which has been reported several times in the past and supposedly fixed in the new versions.
Due to this i decided to bite the bullet and upgrade, so have spent the whole day installing Visual Studio 2015 (alongside 2012) then creating a clean new website for testing, then installed the newest version of the ajaxcontroltoolkit into the new site via
Dropped the control into a page and it's still producing the same error (!) - have attached a screen shot of the error in the designer and the control working in the page, code is as follows :
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="testpage2.aspx.vb" Inherits="testpage2" %>
<head runat="server"> <title></title> </head> <body>
<form id="form1" runat="server"> <div> <asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br
/> <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br /> <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox><br /> <ajaxToolkit:MultiHandleSliderExtender ID="TextBox1_MultiHandleSliderExtender"
runat="server" Enabled="True" HandleAnimationDuration="0.1" Maximum="100" Minimum="0" TargetControlID="TextBox1"> <MultiHandleSliderTargets> <ajaxToolkit:MultiHandleSliderTarget ControlID="TextBox2"
/> <ajaxToolkit:MultiHandleSliderTarget ControlID="TextBox3" /> </MultiHandleSliderTargets> </ajaxToolkit:MultiHandleSliderExtender> </div> </form> </body>