自动完成控件AutoCompleteExtender使用

<ajaxToolkit:<a href="/tag/autocompleteextender/" target="_blank" class="keywords">autocompleteextender</a> ID="<a href="/tag/autocompleteextender/" target="_blank" class="keywords">autocompleteextender</a>1" runat="server" ServiceMethod="GetCountry" ServicePath="WebService1.asmx" MinimumPrefixLength="1" CompletionInterval="500" EnableCaching ="true" TargetControlID="txbCountry" CompletionSetCount="20" > </ajaxToolkit:<a href="/tag/autocompleteextender/" target="_blank" class="keywords">autocompleteextender</a>>

ServiceMethod  调用数据使用的方法

ServicePath Web服务的路径

MinimumPrefixLength 用户输入多少字母才出现提示效果

CompletionInterval 从服务器获取数据的时间间隔，单位为毫秒

EnalbeCaching 是否启用缓存

TargetControlID 要实现提示功能的控件

CompletionSetCount 提示数据的行数

 

创建Web服务，

[WebMethod] public string[] GetCountry(string prefixText,int count) { string <a href="/tag/sql/" target="_blank" class="keywords">sql</a> = "select 国家 from t_国籍 where 国家 like '" + prefixText + "%'"; try { DB.<a href="/tag/open/" target="_blank" class="keywords">open()</a>; <a href="/tag/sql/" target="_blank" class="keywords">sql</a>DataAdapter sda = new <a href="/tag/sql/" target="_blank" class="keywords">sql</a>DataAdapter(<a href="/tag/sql/" target="_blank" class="keywords">sql</a>,DB.m_conn); DataSet ds = new DataSet(); sda.Fill(ds,"myData"); List<string> items = new List<string>(count); for (int i = 0; i < ds.Tables["myData"].Rows.Count; i++) { items.Add(ds.Tables["myData"].Rows[i][0].ToString()); } return items.ToArray(); } catch (Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Exception e) { } finally { DB.Close(); } return new string[0]; }