通过Ajax技术实现无刷新的更新数据表格

HTML代码(WebForm1.aspx)

< HTML >
     < HEAD >
         < title > WebForm2 </ title >
         < meta  content ="Microsoft Visual Studio .NET 7.1"  name ="GENERATOR" >
         < meta  content ="C#"  name ="CODE_LANGUAGE" >
         < meta  content ="JavaScript"  name ="vs_defaultClientScript" >
         < meta  content ="http://schemas.microsoft.com/intellisense/ie5"  name ="vs_targetSchema" >
         < script  language ="javascript" >
              var  xmlHttp;
              function  getdata()
             {
                 
                xmlHttp = new  ActiveXObject( " MSXML2.XMLHTTP " );                              
                xmlHttp.onreadystatechange = getread;
                xmlHttp.Open( " GET " , " AjaxProcess.aspx " , true );
                xmlHttp.Send();
                                 
             }
              function  getread()
             {
                  if  (xmlHttp.readyState == 4 )
                 {
                      if  (xmlHttp.status == 200 )
                     {
                         
                          var  xmlReturn = xmlHttp.responseXML;                                                                                                 
                          var  node = xmlReturn.selectSingleNode( " //NewDataSet " ).childNodes;                         
                          var  tbody = document.createElement( " tbody " );                         
                          for  ( var  i = 0 ;i < node.length;i ++ )
                         {                         
                              var  cnode = node[i].childNodes;
                              var  tmpTr =  document.createElement( " tr " );
                              for ( var  j = 0 ;j < cnode.length;j ++ )
                             {
                                 if  ((cnode[j].nodeName == " c_id " )  ||  (cnode[j].nodeName == " c_name " ))
                                {
                                     var  tmpTd =  document.createElement( " td " );
                                    tmpTd.setAttribute( " style.WIDTH " , " 50px " );
                                    tmpTd.innerText = cnode[j].text
                                    tmpTr.appendChild(tmpTd);                                
                                }                                                                
                                
                             }
                             tbody.appendChild(tmpTr);                             
                             
                         }
                         document.getElementById( " DataGrid2 " ).appendChild(tbody);
                         
                     }
                      else
                     {
                         alert( " xmlHttp.status= " + xmlHttp.status);
                     }
                 }
             }
         </ script >
     </ HEAD >
     < body  MS_POSITIONING ="GridLayout" >
         < form  id ="Form1"  method ="post"  runat ="server" >
             < INPUT  style ="Z-INDEX: 101; LEFT: 32px; POSITION: absolute; TOP: 40px"  onclick ="getdata()"
                type ="button"  value ="Button" >
             < table  id ="DataGrid2"  style ="Z-INDEX: 102; LEFT: 32px; WIDTH: 344px; POSITION: absolute; TOP: 72px; HEIGHT: 24px" >
                 < TR >
                     < TD  style ="WIDTH: 122px" > 机构号 </ TD >
                     < TD  style ="WIDTH: 50px" > 机构名 </ TD >
                 </ TR >
             </ table >
         </ form >
     </ body >
</ HTML >

服务端代码(另外一个aspx.cs文件WebForm2.aspx)

         private   void  Page_Load( object  sender, System.EventArgs e)
        {
             //  在此处放置用户代码以初始化页面
            SqlConnection sqlconn = new  SqlConnection( " Initial Catalog=myDataBase;Data Source=192.168.0.166;UID=sa;PWD=123 " );
            SqlCommand sqlcomm = new  SqlCommand( " select * from tb_table " ,sqlconn);
            System.Data.SqlClient.SqlDataAdapter adapter = new  SqlDataAdapter();
            adapter.SelectCommand = sqlcomm;
            DataSet ds = new  DataSet();
            sqlconn.Open();
            adapter.Fill(ds);
            Response.ContentType = " text/xml " ;
            Response.Write(ds.GetXml());

        }