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xmlhttp无刷新联动

.aspx

< asp:dropdownlist  id ="dlPROVINCE"  runat ="server"  Font-Size ="X-Small"  Width ="85px"  Visible ="False"  Font-Names ="宋体"  BackColor ="#FFFFC0"  AutoPostBack ="false" ></ asp:dropdownlist<asp:dropdownlist id="dlCITY" runat="server" Font-Size="X-Small" Width="85px" Visible="False" Font-Names="宋体" BackColor="#FFFFC0" ></ asp:dropdownlist

 

         < SCRIPT language = " JavaScript " >
             <!--
                 // 以XML求取DropDownList2的数据
　　             function  XmlPost2(obj)
                 {
　　                 var  svalue  =  obj.value;
　　                 var  webFileUrl  =   " ?provinceid= "   +  svalue;
　　                 var  result  =   "" ;
　　                 var  xmlHttp  =   new  ActiveXObject( " MSXML2.XMLHTTP " );
　　                xmlHttp.open( " POST " , webFileUrl,  false );
　　                xmlHttp.send( "" );
　　                result  =  xmlHttp.responseText;
                　　
　　                 if (result  !=   "" )
　　                 {
　　　　                document.all( " dlCity " ).length = 0 ;
　　　　                
　　　　                 var  piArray  =  result.split( " , " );
　　　　                 for ( var  i = 1 ;i < piArray.length;i ++ )
　　　　                 {
　　　　　　                 var  ary1  =  piArray[i].toString().split( " | " );
　　　　　　                document.all( " dlCity " ).options.add( new  Option(ary1[ 1 ].toString(),ary1[ 0 ].toString()));
　　　　                }
　　                }
　　                 else
　　                 {
　　　　                alert(result);
　　                }
                }
             // -->
         </ SCRIPT >

.aspx.vb

Private   Property  provinceid()  As   String
         Get
             If   Not   IsNothing (ViewState( " provinceid " ))  Then
                 If  ViewState( " provinceid " ).ToString  <>   ""   Then
                     Return  ViewState( " provinceid " ).ToString
                 End   If
             Else
                 If   Not   IsNothing (Request( " provinceid " ))  Then
                     If  Request( " provinceid " ).ToString  <>   ""   Then
                         Return  Request( " provinceid " )
                     End   If
                 Else
                     Return   ""
                 End   If
             End   If
         End   Get
         Set ( ByVal  Value  As   String )
            ViewState( " provinceid " )  =  Value
         End   Set
     End Property

     Private   Sub  dlCity_bind( ByVal  id  As   String )

         Dim  mystr  As   String   =   ""
         If  id  <>   " -1 "   Then
             Dim  sql  As   String   =   " select CITY_ID,CITY_NAME from T_CITY where PROVINCE_CODE = ' "   &  id  &   " ' "
             Dim  ds  As  DataSet  =  accessData.selectBySQL2(Session( " ID " ), Session( " PSW " ), sql)
             Dim  i  As   Integer
             If  ds.Tables( 0 ).Rows.Count  <>   0   Then
                mystr  =   " , "   &   " -1 "   &   " | "   &   ""
                 For  i  =   0   To  ds.Tables( 0 ).Rows.Count  -   1
                    mystr  &=   " , "   &  ds.Tables( 0 ).Rows(i).Item( " city_id " )  &   " | "   &  ds.Tables( 0 ).Rows(i).Item( " city_name " )
                 Next
                 ' mystr = mystr.Substring(1)
                 ' mystr = mystr
             End   If
         Else
            mystr  =   " , "   &   " -1 "   &   " | "   &   ""
         End   If
        Response.Write(mystr)
        Response.End()

     End Sub

     Private   Sub  Page_Load( ByVal  sender  As  System.Object,  ByVal  e  As  System.EventArgs)  Handles   MyBase .Load

         On   Error   GoTo  Err_Handler

         If   Me .IsPostBack  Then
             Exit Sub
         End   If

        dlPROVINCE.Attributes.Add( " onchange " ,  " XmlPost2(this); " )

        sqlstr  =   " select * from T_PROVINCE "
         Dim  ds_province  As  DataSet  =  accessData.selectBySQL2(Session( " ID " ), Session( " PSW " ), sqlstr)
        dlPROVINCE.DataTextField  =   " PROVINCE_NAME "
        dlPROVINCE.DataValueField  =   " PROVINCE_CODE "
        dlPROVINCE.DataSource  =  ds_province
        dlPROVINCE.DataBind()

         If  provinceid  <>   ""   Then
             If  provinceid  =   " -1 "   Then
                dlCity_bind( " -1 " )
             Else
                dlCity_bind(provinceid)
             End   If
         End   If

         Exit Sub

Err_Handler:

        ErrorHandle.UnHandError(Session)
         Dim  redirectstr  As   String   =   " <script>window.parent.document.location.href= "   &  _
                 Chr ( 34 )  &   " error.aspx?msg=2 "   &   Chr ( 34 )  &   " ;</script> "
        Response.Clear()
        Response.Write(redirectstr)
        Response.End()

     End Sub
posted on 2006-07-14 16:18 我爱江南 阅读(233) 评论(2)  编辑 收藏 引用 所属分类: VB.NET

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# re: xmlhttp无刷新联动 2006-07-14 16:30 ILoveYou
好人呐！
正需要它呢，千辛万苦终于找到vb.net的了！  回复  更多评论
  

# re: xmlhttp无刷新联动 2009-06-06 17:10 MC
太感谢了。。。找了N多年  回复  更多评论
  

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