I recently started using this method for auto complete, and after a few hours of research, I finally managed to make it work. However, the behavior of the method seems strange to me. Although I am able to get the list of options for auto complete, it does not home in on the right possible match but rather stays on the first line under the text box.
Here is how I declare it:
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="ac" %>
In my aspx file, I use this tag:
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" EnablePartialRendering="true">
</asp:ScriptManager>
<asp:TextBox ID="TBX_theMonthInsert" runat="server" Width="60" />
For the AJAX part, here's what I have:
<ac:AutoCompleteExtender ID="AutoCompleteExtender1" EnableCaching="true" BehaviorID="AutoCompleteCities" TargetControlID="TBX_theMonthInsert" ServiceMethod="GenerateMonthNames" MinimumPrefixLength="2" ContextKey="GenerateMonthNames" CompletionSetCount="2" runat="server" FirstRowSelected="true" CompletionInterval="350" ShowOnlyCurrentWordInCompletionListItem="true">
</ac:AutoCompleteExtender>
And here's the code behind:
[ScriptMethod()]
[WebMethod]
public static string[] GenerateMonthNames(string prefixText, int count, string contextKey)
{
List<string> items = new List<string>();
items.Add("Oliver");
items.Add("Olsen");
items.Add("learns");
items.Add("how");
items.Add("change");
items.Add("world");
items.Add("engaging");
return items.ToArray();
}