Sorry,my english is not very good,please forgive me!
Code：
<asp:AutoCompleteExtender ID="txtTrainId_AutoCompleteExtender" runat="server" DelimiterCharacters="" Enabled="True" ServicePath="" ServiceMethod="GetTrainId" TargetControlID="txtTrainId"></asp:AutoCompleteExtender>
Warning：
Design interface：
After setting the value of “ServicePath”
Code：
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>
<asp:AutoCompleteExtender ID="txtTrainId_AutoCompleteExtender" runat="server" DelimiterCharacters="" Enabled="True" ServicePath="AutoComplete.asmx" ServiceMethod="GetTrainId" TargetControlID="txtTrainId"></asp:AutoCompleteExtender>
Design interface：
Browse in IE11
throw new Error("AjaxControlToolkit requires ASP.NET Ajax 4.0 scripts. Ensure the correct version of the scripts are referenced. If you are using an ASP.NET ScriptManager, switch to the ToolkitScriptManager in AjaxControlToolkit.dll.")I have replaced the ScriptManager with ToolkitScriptManager，I do not know how to solve this problem, please give me some help.
SystemInfo
Development Tools：Visual Studio Ultimate 2012 Update2（Ver.11.0.60315.01） Ajax Control Toolkit Version:Ajax Control Toolkit Net4.5
Website Project Configuration
Target Frame：dotNet Framework 4.5