自动完成实现方法(ajax,jqueyr,webserver)

<asp:ScriptManager ID="ScriptManager1" runat="server"/>
<cc1:AutoCompleteExtender ID="AutoCompleteExtender1" runat="server" ServiceMethod="CusName" ServicePath="AutoService.asmx"
TargetControlID="customer" MinimumPrefixLength="1" EnableCaching="true" >
</cc1:AutoCompleteExtender>

[WebMethod]
public string[] CusName(string prefixText)
{
WebClass.List tmp = new WebClass.List();
DbDataReader dr = tmp.ShowName(prefixText);

List<string> suggestions = new List<string>();//声明一泛型集合
while (dr.Read())
{
suggestions.Add(dr.GetString(0));
}
dr.Close();
return suggestions.ToArray();
}

<link href="css/jquery.autocomplete.css" rel="stylesheet" type="text/css" />
<script language="JavaScript" type="text/javascript" src="js/jquery.js"></script>
<script language="JavaScript" type="text/javascript" src="js/jquery.autocomplete.js"></script>
jvascript:

$(document).ready(function(){
$("#contactperson").autocomplete("AutoHandler.ashx",{
delay:10,
minChars:2,
matchSubset:1,
cacheLength:1,
onItemSelect:selectItem,
onFindValue:findValue,
autoFill:true,
maxItemsToShow:20
});
});

public void ProcessRequest(HttpContext context)
{
//context.Response.ContentType = "text/plain";
//context.Response.Write("Hello World");

string prefixText = context.Request.QueryString["q"];
WebClass.RfsList tmp = new WebClass.RfsList();
DbDataReader dr = tmp.ShowCusName(prefixText);

StringBuilder items = new StringBuilder();
while (dr.Read())
{
items.Append(dr.GetString(0) + "\n");
}
dr.Close();
context.Response.Write(items.ToString());
context.Response.End();
}
ASPX网页同理,css如下:

.ac_results {
padding: 0px;
border: 1px solid WindowFrame;
background-color: Window;
overflow: hidden;
}

.ac_results ul {
width: 100%;
list-style-position: outside;
list-style: none;
padding: 0;
margin: 0;
}

.ac_results iframe {
display:none;/*sorry for IE5*/
display/**/:block;/*sorry for IE5*/
position:absolute;
top:0;
left:0;
z-index:-1;
filter:mask();
width:3000px;
height:3000px;
}

.ac_results li {
margin: 0px;
padding: 2px 5px;
cursor: pointer;
display: block;
width: 100%;
font: menu;
font-size: 12px;
overflow: hidden;
}

.ac_loading {
background : Window url('../img/onload.gif') right center no-repeat;
}

.ac_over {
background-color: Highlight;
color: HighlightText;
}