问题描述:
我想要通过一个按钮继续添加一个下拉菜单，从而达到单选菜单的多选
解析:
用JS~~~
如：
<script language="javascript">
function write(){
s1.innerHTML="<select name=select1><option value=1>选项1</option><option value=2>选项2</option><option value=3>选项3</option></select>"
}
</script>
<form action="" name=myform method="post">
<input type=button name=button1 value="添加" onclick="write()" />
</form>
<div id="s1"></div>
文件1: Deafault.aspx<%@ Page Language="C#" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>HtmlTable演示</title>
</head>
<body>
<h1>HtmlTable实例演示</h1>
<form id="Form1" runat="server">
<table id="MyTable" cellpadding="5" cellspacing="0" border="1" runat="server" >
<tbody>
</tbody>
</table><p>
输入表格行数：
<input type="text" id="MyTextOne" value="1" runat="server"/></p>
<p>输入表格单元格：
<input type="text" id="MyTextTwo" value="1" runat="server" /></p>
<p><input id="Submit1" type="submit" value="产生表格" runat="server" onserverclick="Submit1_ServerClick" /></p>
</form>
</body>
</html>
文件2:Deafault.aspx.cs
using System
using System.Data
using System.Configuration
using System.Web
using System.Web.Security
using System.Web.UI
using System.Web.UI.WebControls
using System.Web.UI.WebControls.WebParts
using System.Web.UI.HtmlControls
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Submit1_ServerClick(object sender, EventArgs e)
{
int row = 0
int numrows = Convert.ToInt32(MyTextOne.Value) // 获得文本框中整型数
int numcells = Convert.ToInt32(MyTextTwo.Value)
for (int j = 0 j < numrows j++)
{
HtmlTableRow r = new HtmlTableRow()
if (row % 2 == 1)// 设置行的背景色
r.BgColor = "Gainsboro"
row++
for (int i = 0 i < numcells i++)
{
HtmlTableCell c = new HtmlTableCell() //创建单元格对象
c.Controls.Add(new LiteralControl("行： " + (j + 1).ToString() + ", 单元格： " +(i + 1).ToString()))
r.Cells.Add(c) //添加该单元格对象
}
MyTable.Rows.Add(r)//添加行对
}
HtmlTableRow r2 = new HtmlTableRow()
HtmlTableCell c2 = new HtmlTableCell()
c2.Controls.Add(new LiteralControl("吉林大学远程教育学院"))
c2.ColSpan = 3 //合并单元格,colspan属性可以实现单元格跨越多列
r2.Cells.Add(c2)
MyTable.Rows.Add(r2)
}
}
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