Ajax学习笔记（一）：AutoCompleteExtender控件
AutoCompleteExtender：字面上翻译就是自动完成扩展控件
既然是扩展控件，就要依托于其他的控件。
AutoCompleteExtender的属性：
TargetControlID：The TextBox control where the user types content to be automatically completed
目标Textbox控件的ID，因为是扩展控件，所以要与textbox控件相关联
ServiceMethod： The web service method to be called.
调用WebService中的方法名称。（AutoCompleteExtender控件是通过webservice技术实现其功能的，webservice技术现在我了解的不是很深入，希望朋友们可以帮我介绍一 下这方面的资料）
ServicePath ： The path to the web service that the extender will pull the word\sentence completions from. If this is not provided, the service method should be a page method
调用Webservice的路径。
ContextKey ： User/page specific context provided to an optional overload of the web method described by ServiceMethod/ServicePath.
提供了另一种参数
MinimumPrefixLength：指出开始提供提示服务时，TextBox控件应有的最小字符数，默认为3；
CompletionSetCount：显示的条数，默认为10；
EnableCaching：是否在客户端缓存数据，默认为true；
CompletionInterval：从服务器读取数据的时间间隔，默认为1000，单位：毫秒。
红色标记的属性为常用的属性，黑色的大家可以下去慢慢的研究。
OK下面开始学习了 呵呵
1.在数据库中建一个表，结构如下：
MinimumPrefixLength="1" //
ServicePath="WebService.asmx" //WebService的路径
ServiceMethod="GetProductName" //WebServic中方法的名称
CompletionSetCount="2"
CompletionInterval="100"
OnClientItemSelected="OnACEItemSelected"
CompletionListItemCssClass=""
CompletionListCssClass=""
CompletionListHighlightedItemCssClass=""
ShowOnlyCurrentWordInCompletionListItem="False" ViewStateMode="Inherit">
1
<
form id
=
"
form1
"
runat
=
"
server
"
>
2
<
asp:ScriptManager ID
=
"
ScriptManager1
"
runat
=
"
server
"
>
3
</
asp:ScriptManager
>
4
<
div
>
5
<
asp:TextBox ID
=
"
TextBox1
"
runat
=
"
server
"
></
asp:TextBox
>
6
<
asp:AutoCompleteExtender ID
=
"
AutoCompleteExtender1
"
7
runat
=
"
server
"
8
TargetControlID
=
"
TextBox1
"
9
MinimumPrefixLength
=
"
1
"
10
ServicePath
=
"
WebService.asmx
"
11
ServiceMethod
=
"
GetProductName
"
12
CompletionSetCount
=
"
2
"
13
CompletionInterval
=
"
100
"
14
OnClientItemSelected
=
"
OnACEItemSelected
"
15
CompletionListItemCssClass
=
""
16
CompletionListCssClass
=
""
17
CompletionListHighlightedItemCssClass
=
""
18
ShowOnlyCurrentWordInCompletionListItem
=
"
False
"
ViewStateMode
=
"
Inherit
"
>
19
</
asp:AutoCompleteExtender
>
20
</
div
>
21
</
form
>
1
public
string
[] GetProductName(
string
prefixText,
int
count)
2
{
3
List
<
string
>
suggestions
=
new
List
<
string
>
();
//
声明一泛型集合
4
SqlConnection con
=
new
SqlConnection(
"
database=Port;Integrated Security=False;user id=zhang;password=1230.;server=.
"
);
5
con.Open();
6
7
SqlCommand com
=
new
SqlCommand(
"
select StaPortCN from Port where PoetCNEN like @PoetCNEN
"
, con);
8
com.Parameters.Add(
"
@PoetCNEN
"
, SqlDbType.NVarChar).Value
=
"
%
"
+
prefixText
+
"
%
"
;
9
SqlDataReader sdr
=
com.ExecuteReader();
10
while
(sdr.Read())
11
{
12
suggestions.Add(sdr.GetString(
0
));
//
将结果保存在数组中
13
14
}
15
sdr.Close();
16
con.Close();
17
return
suggestions.ToArray();
18
19
20
21
22
23
24
}
