利用web 服务实现自动完成输入

利用web 服务实现自动完成输入

利用web 服务实现自动完成输入,废话不多说。前台界面：

 

代码

< asp:textbox  id ="TextBox1"  runat ="server" ></ asp:textbox >
                     
                      < ajaxToolkit:AutoCompleteExtender  ID ="AutoCompleteExtender3"  runat ="server"  Enabled ="true"
             TargetControlID ="TextBox1"
              ServicePath ="/LsComplete.asmx"
              ServiceMethod ="GetCompleteDepart"
              CompletionInterval ="500"
              CompletionSetCount ="10"
              MinimumPrefixLength ="1" >
             </ ajaxToolkit:AutoCompleteExtender >

 

后台代码：

新建一个web服务：

 

代码

using  System;
using  System.Web;
using  System.Collections;
using  System.Web.Services;
using  System.Web.Services.Protocols;

using  System.Data;
using  System.Data.SqlClient;
using  System.Configuration;

///   <summary>
///  LsComplete 的摘要说明
///   </summary>
[WebService(Namespace  =   " http://tempuri.org/ " )]
[WebServiceBinding(ConformsTo  =  WsiProfiles.BasicProfile1_1)]
[System.Web.Script.Services.ScriptService]
public   class  LsComplete : System.Web.Services.WebService {

     public  LsComplete () {

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

     private   static   string [] autoCompleteWordList  =   null ;
    [WebMethod]
     public  String[] GetCompleteDepart( string  prefixText,  int  count)
    {
         //  如果数组为空
         if  (autoCompleteWordList  ==   null )
        {
             // 读取数据库的内容

             string  ConnectionString  =  ConfigurationSettings.AppSettings[ " SQLConnectionString " ];
            SqlConnection myconn  =   new  SqlConnection(ConnectionString);
            myconn.Open();


             //  SqlDataAdapter da = new SqlDataAdapter("select departname from departinfo  where departname like'" + prefixText + "%' order by departname", conn);


             string  mySel  =   " select title from [表名]  where Rtrim(字段) like'% "   +  prefixText  +   " %'  " ;
            SqlDataAdapter Adpt  =   new  SqlDataAdapter(mySel, myconn);

            DataSet ds  =   new  DataSet();
            Adpt.Fill(ds);
             // 读取内容文件的数据到临时数组
             string [] temp  =   new   string [ds.Tables[ 0 ].Rows.Count];
             int  i  =   0 ;
             foreach  (DataRow dr  in  ds.Tables[ 0 ].Rows)
            {
                temp[i]  =  dr[ " 字段 " ].ToString().Trim();
                i ++ ;
            }
             // 将临时数组的内容赋给返回数组
            autoCompleteWordList  =  temp;
             if  (myconn.State  ==  ConnectionState.Open)
                myconn.Close();
        }
        String[] returnValue  =   new   string [count];
        returnValue  =  autoCompleteWordList;
        autoCompleteWordList  =   null ;
         // 返回数据
         return  returnValue;
    }
    
}