Problem in AJAX Autocomplete

Hi i am using Autocompletion feature in my project for loading cities with matched keys in textbox using AutoCompleteExtender of Ajax Toolkit. Its working fine but when i use the same code in User control (.ascx) file, then i can't work. and also when i use the same code for autocompletion in URL Friendly Urls then the page hang out can any one told me why this happen and how i use AutoCompleteExtender efficiently in my project. My complete coding is shown below.

.aspx page.

<asp:TextBox ID="txt_search_city" Width="130px" runat="server">

<cc1:AutoCompleteExtender ID="AutoCompleteExtender2" runat="server" TargetControlID="txt_search_city"
ServiceMethod="GetCompletionListWithContext" UseContextKey="true" MinimumPrefixLength="2"
EnableCaching="false" CompletionSetCount="20" CompletionInterval="2000" FirstRowSelected="true"
DelimiterCharacters=";," />

Code behind Section:

<System.Web.Services.WebMethod()> _
<System.Web.Script.Services.ScriptMethod()> _
Public Shared Function GetCompletionListWithContext(ByVal prefixText As String, ByVal count As Integer, ByVal contextKey As String) As String()
If Not contextKey = Nothing Then
Return "this is a total of fifteen words that will be returned when we use context".Split(" ")
End If
If count = 0 Then
count = 20
End If
Dim items As New System.Collections.Generic.List(Of String)
'get data from database
Dim _loc As New Locations
Dim str As String
Dim ds As DataSet = _loc.Load_Cities(prefixText, count)
If ds.Tables(0).Rows.Count > 0 Then
Dim i As Integer
For i = 0 To count - 1
str = ds.Tables(0).Rows(i).Item("city").ToString()
If ds.Tables(0).Rows(i).Item("StateProvince").ToString() = "Rentals" Then
str = ds.Tables(0).Rows(i).Item("city").ToString() & " - " & ds.Tables(0).Rows(i).Item("CountryCode").ToString()
Else
str = ds.Tables(0).Rows(i).Item("city").ToString() & " - " & ds.Tables(0).Rows(i).Item("StateProvince").ToString()
End If
items.Add(str)
Next
End If
Return items.ToArray()
End Function

Waiting for some helpful response.

Thanks.

You may need a ScriptManager or a ScriptManagerProxy control in the user control.

Hi thanks for your reply...

I have already place Script manager on page rather than user control. is it not ok, and also when i am using auto complete on User Friendly URL Like http://www.abc.com/categories/232/auto.aspx then complete page is hang out. what will be the possible cause here for autocomplete control.

Thanks.

media_1408:

when i use the same code in User control (.ascx) file, then i can't work.

The code in a user control can't be accessed from client side directly, that's because request for file extension .ascx is blocked.

media_1408:

also when i use the same code for autocompletion in URL Friendly Urls then the page hang out

The ajax extension uses the virtualPath of current page to get an instance of the corresponding object and invoke a method on it with Reflection, and it's likely to fail to work when url rewriting is enabled. Since the a file can't be found with the user friendly URL.

In my opinion, a better idea is to use Web Service rather than a Page Method. And don't apply any rewriting rules to .asmx file extension.

Thanks a lot for your wonderful help, as user control problem is not solved and also it is not big issue, but by using Web Service rather than a Page Method, page hanging problem due to auto completion is also solved on URL Friendly Urls.

Thanks.