asp.net AutoCompleteExtender的一个简单例子代码

<asp:textbox id="txttempscenic" runat="server"></asp:textbox>
<ajax:autocompleteextender id="txttempscenic_autocompleteextender" runat="server" behaviorid="autocompleteex" delimitercharacters="" enabled="true" servicepath="~/webservice/autocomplete.asmx" servicemethod="getscenic" targetcontrolid="txttempscenic" completioninterval="500" completionsetcount="20" enablecaching="true" minimumprefixlength="1"></ajax:autocompleteextender>

autocomplete.asmx

<%@ webservice language="c#" codebehind="~/app_code/autocomplete.cs" class="autocomplete" %>

autocomplete.cs

using system;
using system.collections.generic;
using system.linq;
using system.web;
using system.web.services;
using system.data;

/// <summary>
///add by ahuinan
/// </summary>
[webservice(namespace = "http://tempuri.org/")]
[webservicebinding(conformsto = wsiprofiles.basicprofile1_1)]
//若要允许使用 asp.net ajax 从脚本中调用此 web 服务，请取消对下行的注释。
[system.web.script.services.scriptservice]
public class autocomplete : system.web.services.webservice
{


public autocomplete()
{

//如果使用设计的组件，请取消注释以下行
//initializecomponent();
}

[webmethod]
public string helloworld()
{
return "hello world";
}


//获得景区
[webmethod]
public string[] getscenic(string prefixtext,int count)
{

et_erp.bll.erp_scenicarea b_scenicarea = new et_erp.bll.erp_scenicarea();
string strwhere = " sa_name like '" + prefixtext + "%' and sa_isdel = 0";

dataset ds = b_scenicarea.select(" top "+count+" sa_name", strwhere);

count = ds.tables[0].rows.count;

string[] array = new string[count];
for (int i = 0; i < count; i++)
{
array[i] = ds.tables[0].rows[i]["sa_name"].tostring();
}

return array;
}
}