没有网络服务的AutoComplete Extender无法启动

问题描述

我在页面中使用自动完成扩展器，但执行时未触发该功能.我在应用程序中使用母版页面.
这是我的代码

Hi,
Iam using autocomplete extender in my page.But the function is not fired while execution.I am using master page in my application.
here is my Code

<asp:TextBox ID="txtDiagnosis"  runat="server"
                               Width="150px"  Font-Bold="True"
                               Font-Size="Medium" Font-Names="Courier New" style="margin-left: 15px"></asp:TextBox>
                           <asp:AutoCompleteExtender ID="txtDiagnosis_AutoCompleteExtender" runat="server"
                              MinimumPrefixLength="3" EnableCaching="false" CompletionSetCount="1" CompletionInterval="100" ServiceMethod="Casesheet.aspx/getDiagnosis"
                               TargetControlID="txtDiagnosis">
                           </asp:AutoCompleteExtender>

后面的代码

code behind

<System.Web.Script.Services.ScriptMethod(), _
 System.Web.Services.WebMethod()> _
    Public Function getDiagnosis(ByVal prefixtext As String) As List(Of String)
        Dim sqlstr As String
        Dim dtable As New DataTable

        Dim diaglist As New List(Of String)
        gappln_data.OpenConnection(gappln_data.appln_cn)

        sqlstr = "select DESCRIPTION from MAJORCODES where DESCRIPTION like ''%" & prefixtext & "%"
        dtable = gappln_data.GetArray(sqlstr, gappln_data)
        gappln_data.appln_cn.Close()
        gappln_data.appln_cn.Dispose()
        If dtable.Rows.Count <> 0 Then
            Dim objDiagnosis As String
            For i = 0 To dtable.Rows.Count - 1
                objDiagnosis = dtable.Rows(i).Item(0).ToString
                diaglist.Add(objDiagnosis)
            Next
        End If
        Return diaglist
    End Function

执行时未触发功能

Function is not firing while execution

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