AutoCompleteExtender轻易实现搜索智能提示 附带一点小讨论
看到AjaxControlToolkit也支持.net4.0了，于是就在vs2010里，做了一个示例。例子本来不少人都写了没什么复杂的，这里贴出来供朋友们参考。最后有个小疑问探讨一下：
前台代码：
1
<%
@ Page Language
=
"
C#
"
AutoEventWireup
=
"
true
"
CodeBehind
=
"
Default.aspx.cs
"
Inherits
=
"
Search.Default
"
%>
2
3
<%
@ Register Assembly
=
"
AjaxControlToolkit
"
Namespace
=
"
AjaxControlToolkit
"
TagPrefix
=
"
asp
"
%>
4
<!
DOCTYPE html PUBLIC
"
-//W3C//DTD XHTML 1.0 Transitional//EN
"
"
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd
"
>
5
<
html xmlns
=
"
http://www.w3.org/1999/xhtml
"
>
6
<
head runat
=
"
server
"
>
7
<
title
>
My Search
</
title
>
8
</
head
>
9
<
body
>
10
<
form id
=
"
form1
"
runat
=
"
server
"
>
11
<
div
>
12
<
asp:ScriptManager ID
=
"
ScriptManager1
"
runat
=
"
server
"
>
13
<
Services
>
14
<
asp:ServiceReference InlineScript
=
"
True
"
Path
=
"
AutoCompleteServices.asmx
"
/>
15
</
Services
>
16
</
asp:ScriptManager
>
17
</
div
>
18
<
div align
=
"
center
"
>
19
<
asp:TextBox ID
=
"
txtKey
"
runat
=
"
server
"
Width
=
"
600
"
></
asp:TextBox
>
20
<
asp:AutoCompleteExtender ID
=
"
AutoCompleteExtender1
"
runat
=
"
server
"
TargetControlID
=
"
txtKey
"
21
Enabled
=
"
true
"
EnableCaching
=
"
true
"
ServicePath
=
"
AutoCompleteServices.asmx
"
ServiceMethod
=
"
GetTextString
"
22
MinimumPrefixLength
=
"
2
"
CompletionSetCount
=
"
5
"
CompletionInterval
=
"
10
"
>
23
</
asp:AutoCompleteExtender
></
div
>
24
</
form
>
25
</
body
>
26
</
html
>
web服务代码：
1
using
System;
2
using
System.Collections.Generic;
3
using
System.Linq;
4
using
System.Web;
5
using
System.Web.Services;
6
7
namespace
Search
8
{
9
///
<summary>
10
///
AutoCompleteServices 的摘要说明
11
///
</summary>
12
[System.Web.Script.Services.ScriptService]
13
public
class
AutoCompleteServices : System.Web.Services.WebService
14
{
15
[WebMethod]
16
public
string
[] GetTextString(
string
prefixText,
int
count)
17
{
18
string
[] strArray
=
new
string
[count];
19
20
chaonong086Entities db
=
new
chaonong086Entities();
21
using
(db)
22
{
23
strArray
=
(from item
in
db.PE_Article
where
item.Title.Contains(prefixText) select item.Title).Take(count).ToArray();
24
}
25
return
strArray;
26
}
27
}
28
}
1 |
<P> </P> |
以上我用linq去得到一个数组，从而实现了功能。
起初，一直不出现智能提示，别的朋友说貌似是web服务并未得到触发。后来删掉了web服务里默认存在的hello方法，并删掉了以下两行：
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]]
然后智能提示才出现了。这真是一个奇怪的现象。