ASP.net DropDownList 无刷新联动!

王朝c#·作者佚名  2006-12-17
窄屏简体版  字體: |||超大  

<TITLE>WebForm2</TITLE>

<SCRIPT language='javascript'>

function load(){

var drp2 = document.getElementById('DropDownList2');

drp2.innerText='';

for(var i = 0;i<=drp2.options.length -1;i++){

drp2.remove(i);

}

var drp3 = document.getElementById('DropDownList3');

for(var i = 0;i<=drp3.options.length -1;i++){

drp3.remove(i);

}

var xmlhttp = new ActiveXObject('MSXML2.XMLHTTP');

var oDoc = new ActiveXObject('MSXML2.DOMDocument');

var state=document.getElementById('DropDownList1').value;

xmlhttp.open('POST', 'webform1.aspx?id='+state,false);

xmlhttp.send('');

var res=oDoc.loadXML(xmlhttp.responseText);

var naItems = oDoc.selectNodes('//Market/Table/maName');

var idItems = oDoc.selectNodes('//Market/Table/maId');

var item;

var id;

for (item = naItems.nextNode(),id=idItems.nextNode(); item&&id; item = naItems.nextNode(),id=idItems.nextNode()){

var nastr = item.nodeTypedValue;

var idstr = id.nodeTypedValue;

var newOption = document.createElement('OPTION');

newOption.text =nastr;

newOption.value = idstr;

drp2.options.add(newOption);

}

load2();

}

function load2(){

var drp2 = document.getElementById('DropDownList3');

drp2.innerText='';

for(var i = 0;i<=drp2.options.length -1;i++){

drp2.remove(i);

}

var xmlhttp = new ActiveXObject('MSXML2.XMLHTTP');

var oDoc = new ActiveXObject('MSXML2.DOMDocument');

var state=document.getElementById('DropDownList2').value;

xmlhttp.open('POST', 'webform3.aspx?id='+state,false);

xmlhttp.send('');

var res=oDoc.loadXML(xmlhttp.responseText);

var naItems = oDoc.selectNodes('//Market/Table/maName');

var idItems = oDoc.selectNodes('//Market/Table/maId');

var item;

var id;

for (item = naItems.nextNode(),id=idItems.nextNode(); item&&id; item = naItems.nextNode(),id=idItems.nextNode()){

var nastr = item.nodeTypedValue;

var idstr = id.nodeTypedValue;

var newOption = document.createElement('OPTION');

newOption.text =nastr;

newOption.value = idstr;

drp2.options.add(newOption);

}

}

</SCRIPT>

</HEAD>

<BODY ms_positioning='GridLayout' onload='load()'>

<FORM id='Form1' method='post' runat='server'>

<ASP:DROPDOWNLIST id='DropDownList1' runat='server'></ASP:DROPDOWNLIST>

<ASP:DROPDOWNLIST id='DropDownList2' runat='server'></ASP:DROPDOWNLIST>

<ASP:DROPDOWNLIST id='Dropdownlist3' runat='server'></ASP:DROPDOWNLIST>

</FORM>

</BODY>

</HTML>

-----------------------

namespace dropDown

{

/// <summary>

/// WebForm2 的摘要说明。

/// </summary>

public class WebForm2 : System.Web.UI.Page

{

protected System.Web.UI.WebControls.DropDownList DropDownList1;

protected System.Web.UI.WebControls.DropDownList Dropdownlist3;

protected System.Web.UI.WebControls.DropDownList DropDownList2;

private void Page_Load(object sender, System.EventArgs e)

{

// 在此处放置用户代码以初始化页面

if(!this.IsPostBack)

{

SqlConnection con = new SqlConnection('server=localhost;database=star;uid=sa;pwd=');

SqlDataAdapter da = new SqlDataAdapter('select maId,maName from tabMarket where maCls=0',con);

DataSet ds = new DataSet();

da.Fill(ds,'op');

this.DropDownList1.DataSource=ds.Tables[0];

this.DropDownList1.DataTextField = 'maName';

this.DropDownList1.DataValueField = 'maId';

this.DropDownList1.DataBind();

this.DropDownList1.Attributes.Add('onchange','load()');

this.DropDownList2.Attributes.Add('onchange','load2()');

}

}

}

}

-----------------------

public class WebForm1 : System.Web.UI.Page

{

private void Page_Load(object sender, System.EventArgs e)

{

// 在此处放置用户代码以初始化页面

// Put user code to initialize the page here

//if(this.Request['state']!=null)

//{

string id =this.Request['id'];

SqlConnection con = new SqlConnection('server=localhost;database=star;uid=sa;pwd=;');

SqlDataAdapter da = new SqlDataAdapter('select maName,maId from tabMarket where maParent=@id and maSt=1 ',con);

da.SelectCommand.Parameters.Add('@id',id);

DataSet ds = new DataSet('Market');

da.Fill(ds);

ds.WriteXml(Response.OutputStream);

Response.Flush ();

Response.End ();

//}

}

}

-----------------------------

public class WebForm3 : System.Web.UI.Page

{

private void Page_Load(object sender, System.EventArgs e)

{

// 在此处放置用户代码以初始化页面

string id =Request['id'];

SqlConnection con = new SqlConnection('server=localhost;database=star;uid=sa;pwd=;');

SqlDataAdapter da = new SqlDataAdapter('select maName,maId from tabMarket where maParent=@id and maSt=1',con);

da.SelectCommand.Parameters.Add('@id',id);

DataSet ds = new DataSet('Market');

da.Fill(ds);

ds.WriteXml(Response.OutputStream);

Response.Flush ();

Response.End ();

}

}

------------------

 
 
 
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