<body>
<form id="form1" runat="server">
<div>
<select id="Select1" style="width: 211px" onchange="Get_Amb(this.value)">
<option></option>
</select><select id="Select2" style="width: 175px" onchange="Get_ThirdClass(this.value)">
<option></option>
</select><select id="Select3" style="width: 186px">
<option></option>
</select>
<!--以下的脚本代码必须写在html控件后面，否则页面初始化时会发生脚本错误-->
<script language="javascript">
//初始化页面绑定第一个下拉框
Get_Stair();
//通过脚本调用Ajax方法来初始化第一个下拉框
function Get_Stair()
{
var obj_Class = document.getElementById("Select1");
//TestLiandong是在cs代码中注册的Ajax类，bindSelect1是其中的方法
var Stair = TestLiandong.bindSelect1().value;
if(Stair==null||typeof(Stair)!="object")
{
return ;
}
else
{
obj_Class.options.length = 0;
//给第一个下拉框动态赋值
for (var i = 0; i < Stair.Rows.length; i++)
{
obj_Class.options[i] = new Option(Stair.Rows[i].StairName, Stair.Rows[i].StairID);
}
Get_Amb(obj_Class.options[0].value);
}
}
function Get_Amb(stairID)
{
var obj_Amb = document.getElementById("Select2");
var amb = TestLiandong.bindSelect2(stairID).value;
if(amb==null||typeof(amb)!="object")
{
return ;
}
else
{
obj_Amb.options.length = 0;
for (var i = 0; i < amb.Rows.length; i++)
{
obj_Amb.options[i] = new Option(amb.Rows[i].AmbName, amb.Rows[i].AmbID);
}
Get_ThirdClass(obj_Amb.options[0].value);
}
}
function Get_ThirdClass(AmbID)
{
var obj_ThirdClass = document.getElementById("Select3");
var thirdClass = TestLiandong.bindSelect3(AmbID).value;
if(thirdClass==null||typeof(thirdClass)!="object")
{
return ;
}
else
{
obj_ThirdClass.options.length = 0;
for (var i = 0; i < thirdClass.Rows.length; i++)
{
obj_ThirdClass.options[i] = new Option(thirdClass.Rows[i].ThirdClassName, thirdClass.Rows[i].ThirdClassID);
}
}
}</script>
</div>
</form>
</body>
以下是.cs的代码：<form id="form1" runat="server">
<div>
<select id="Select1" style="width: 211px" onchange="Get_Amb(this.value)">
<option></option>
</select><select id="Select2" style="width: 175px" onchange="Get_ThirdClass(this.value)">
<option></option>
</select><select id="Select3" style="width: 186px">
<option></option>
</select>
<!--以下的脚本代码必须写在html控件后面，否则页面初始化时会发生脚本错误-->
<script language="javascript">
//初始化页面绑定第一个下拉框
Get_Stair();
//通过脚本调用Ajax方法来初始化第一个下拉框
function Get_Stair()
{
var obj_Class = document.getElementById("Select1");
//TestLiandong是在cs代码中注册的Ajax类，bindSelect1是其中的方法
var Stair = TestLiandong.bindSelect1().value;
if(Stair==null||typeof(Stair)!="object")
{
return ;
}
else
{
obj_Class.options.length = 0;
//给第一个下拉框动态赋值
for (var i = 0; i < Stair.Rows.length; i++)
{
obj_Class.options[i] = new Option(Stair.Rows[i].StairName, Stair.Rows[i].StairID);
}
Get_Amb(obj_Class.options[0].value);
}
}
function Get_Amb(stairID)
{
var obj_Amb = document.getElementById("Select2");
var amb = TestLiandong.bindSelect2(stairID).value;
if(amb==null||typeof(amb)!="object")
{
return ;
}
else
{
obj_Amb.options.length = 0;
for (var i = 0; i < amb.Rows.length; i++)
{
obj_Amb.options[i] = new Option(amb.Rows[i].AmbName, amb.Rows[i].AmbID);
}
Get_ThirdClass(obj_Amb.options[0].value);
}
}
function Get_ThirdClass(AmbID)
{
var obj_ThirdClass = document.getElementById("Select3");
var thirdClass = TestLiandong.bindSelect3(AmbID).value;
if(thirdClass==null||typeof(thirdClass)!="object")
{
return ;
}
else
{
obj_ThirdClass.options.length = 0;
for (var i = 0; i < thirdClass.Rows.length; i++)
{
obj_ThirdClass.options[i] = new Option(thirdClass.Rows[i].ThirdClassName, thirdClass.Rows[i].ThirdClassID);
}
}
}</script>
</div>
</form>
</body>
protected void Page_Load(object sender, EventArgs e)
{
Ajax.Utility.RegisterTypeForAjax(typeof(TestLiandong),this);
}
[Ajax.AjaxMethod()]
public DataTable bindSelect1()
{
EN.BLL.admin.E_Stair stair = new EN.BLL.admin.E_Stair();
return stair.GetList().Tables[0];
}
[Ajax.AjaxMethod()]
public DataTable bindSelect2(int StairID)
{
EN.BLL.admin.E_Amb amb = new EN.BLL.admin.E_Amb();
return amb.GetListByStairID(StairID).Tables[0];
}
[Ajax.AjaxMethod()]
public DataTable bindSelect3(int AmbID)
{
EN.BLL.admin.E_ThirdClass thirdClass = new EN.BLL.admin.E_ThirdClass();
return thirdClass.GetListByAmbID(AmbID).Tables[0];
}
{
Ajax.Utility.RegisterTypeForAjax(typeof(TestLiandong),this);
}
[Ajax.AjaxMethod()]
public DataTable bindSelect1()
{
EN.BLL.admin.E_Stair stair = new EN.BLL.admin.E_Stair();
return stair.GetList().Tables[0];
}
[Ajax.AjaxMethod()]
public DataTable bindSelect2(int StairID)
{
EN.BLL.admin.E_Amb amb = new EN.BLL.admin.E_Amb();
return amb.GetListByStairID(StairID).Tables[0];
}
[Ajax.AjaxMethod()]
public DataTable bindSelect3(int AmbID)
{
EN.BLL.admin.E_ThirdClass thirdClass = new EN.BLL.admin.E_ThirdClass();
return thirdClass.GetListByAmbID(AmbID).Tables[0];
}
