使用Ajax实现DropDownList和ListBox的联动以及两个ListBox之间数据的-技术开发专区

使用Ajax实现DropDownList和ListBox的联动以及两个ListBox之间数据的

作者：ITPUB论坛编辑： nancy 2008-07-02 00:00

【IT168技术文档】

这里使用到了两张表：部门表和员工表 SQL脚本如下：

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Emp]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[Emp]
GO
CREATE TABLE [dbo].[Emp] (
[EmpID] [int] IDENTITY (1, 1) NOT NULL ,
[EmpName] [varchar] (20) COLLATE Chinese_PRC_CI_AS NULL ,
[Age] [int] NULL ,
[Dept] [int] NULL ,
[DelFlag] [bit] NULL
) ON [PRIMARY]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Department]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[Department]
GO
CREATE TABLE [dbo].[Department] (
[DeptID] [int] IDENTITY (1, 1) NOT NULL ,
[Name] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY]
GO

前台代码：

<HTML>
<HEAD>
<title>ListBoxToListBox</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<link href="../CSS/BasicLayout.css" rel="stylesheet" type="text/css">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
<style type="text/css"> .fsize { FONT-SIZE: 10pt } </style>
</HEAD>
<body MS_POSITIONING="GridLayout">
<script language="javascript">
function BindListEmp()
{
var DeptID=document.getElementById("ddlDept").value;
var obj=AjaxMethod.GetEmpByDeptID(DeptID);
if(obj.value!=null)
{
document.all("listEmployees").length=0;
var ds=obj.value;
if(ds != null && typeof(ds) == "object" && ds.Tables != null)
{
for(var i=0; i<ds.Tables[0].Rows.length; i++)
　　　　   {
　　　　    var name=ds.Tables[0].Rows[i].EmpName;
　　　　　　   var id=ds.Tables[0].Rows[i].EmpID;
　　　　　　   //alert(name);
　　　　　　   //alert(id);
　　　　　　   document.all("listEmployees").options.add(new Option(name,id));
　　　　   }
}
else
{
}
}
else
{
}
}
</script>
<script language="javascript">
function GetData()
{
listNewEmp = eval("document.FrmListBox.listNewEmp");
document.getElementById("txtEmpID").value="";
for(i=0;i<listNewEmp.length;i++)
{
document.FrmListBox.txtEmpID.value+=listNewEmp.options[i].value+",";
}
}
function AddItem(ControlName)
{
Control = null;
Control=eval("document.FrmListBox.listNewEmp");
var x=0;
var i=0;
var y=0;
listEmployees=eval("document.FrmListBox.listEmployees");
listNewEmp=eval("document.FrmListBox.listNewEmp");
var j=listEmployees.length;
for(i=0;i<j;i++)
{
if(listEmployees.options[i].selected==true)
{
//alert(Control.length);
         if(Control.length==0)
{
Control.add(new Option(listEmployees[i].text,listEmployees.options[i].value));
listNewEmp=eval("document.FrmListBox.listNewEmp");
continue;
}
else
{
for(x=0;x<listNewEmp.length;x++)
{
if(listEmployees.options[i].value==listNewEmp.options[x].value)
{
y++;
}
}
}
if(y==0)
{
Control.add(new Option(listEmployees[i].text,listEmployees.options[i].value));
listNewEmp=eval("document.FrmListBox.listNewEmp");
}
}
}
}
function RemoveItem(ControlName)
{
Control = null;
Control=eval("document.FrmListBox.listNewEmp");
var j=Control.length;
if(j==0) return;
for(j;j>0;j--)
{
if(Control.options[j-1].selected==true)
{
Control.remove(j-1);
}
}
}
</script>
<form id="FrmListBox" method="post" runat="server">
<table align="center" border="1" style="BORDER-COLLAPSE: collapse" borderColor="#ccccc"
width="80%" class="fSize">
<TR>
<TD style="WIDTH: 191px" align="right" width="191" height="30">公司部门：</TD>
<TD height="30"><asp:dropdownlist id="ddlDept" runat="server" Width="112px"></asp:dropdownlist></TD>
</TR>
<TR>
<TD style="WIDTH: 191px" align="right" width="191" height="30">项目成员：</TD>
<TD height="30">
<TABLE id="Table3" cellSpacing="0" cellPadding="0" width="100%" border="0">
<TR align="center">
<TD style="WIDTH: 139px">
<asp:listbox id="listEmployees" runat="server" Width="141" Height="160" SelectionMode="Multiple"></asp:listbox></TD>
<TD style="WIDTH: 33px"><INPUT class="buttoncss" style="WIDTH: 48px; HEIGHT: 24px" onclick="AddItem(this.name)"
type="button" value=">>>>" name="btnReceSendToRight"><BR>
<INPUT class="buttoncss" style="WIDTH: 48px; HEIGHT: 24px" onclick="RemoveItem(this.name)"
type="button" value="<<<<" name="btnReceSendToLeft">
</TD>
<TD align="left">
<asp:listbox id="listNewEmp" runat="server" Width="141" Height="160" SelectionMode="Multiple"></asp:listbox>&nbsp;
</TD>
</TR>
</TABLE>
</TD>
</TR>
<tr>
<td height="30" align="right">存储listNew控件中所得到的值：</td>
<td>
<asp:TextBox id="txtEmpID" runat="server"></asp:TextBox></td>
</tr>
<TR>
<TD align="center" colSpan="2" height="35">&nbsp;
<asp:button id="btnSubmit" runat="server" Width="64" Text="确定" CssClass="redButtonCss" Height="24"></asp:button>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</TD>
</TR>
</table>
</TD></TR></TABLE>
</form>
</body>
</HTML>

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