Default.aspx
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true"></asp:ScriptManager>
<label for="txteno"> Enter Badge No : </label>
<asp:TextBox ID="txteno" runat="server" AutoPostBack="True" OnTextChanged="txteno_TextChanged"
MaxLength="6" CssClass="form-control"></asp:TextBox>
<asp:AutoCompleteExtender ServiceMethod="GetCompletionList" MinimumPrefixLength="0" CompletionInterval="10" EnableCaching="false" CompletionSetCount="1" TargetControlID="txteno"
ID="AutoCompleteExtender1" runat="server" FirstRowSelected="true" CompletionListCssClass="AutoExtender" CompletionListItemCssClass="AutoExtenderList" CompletionListHighlightedItemCssClass="AutoExtenderHighlight" >
</asp:AutoCompleteExtender>
<label for="txtename"> Name : </label>
<asp:TextBox ID="txtename" runat="server" CssClass="form-control" ReadOnly="true"></asp:TextBox>
<label for="txtnationality"> Designation : </label>
<asp:TextBox ID="txtnationality" runat="server" CssClass="form-control" onkeyup="this.value = this.value.toUpperCase();"></asp:TextBox>
<label for="txtdname"> Nationality : </label>
<asp:TextBox ID="txtdname" runat="server" CssClass="form-control" onkeyup="this.value = this.value.toUpperCase();"></asp:TextBox>
<asp:Label ID="lblerror" runat="server" Font-Bold="false" ForeColor="Red"></asp:Label>
</form>
No Error
But not able to load auto complete drop-down, hosted application in IIS 8.0 and Session State is true