DataTabe对象的例子

前：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="DataTable对象.aspx.cs" Inherits="WebApplication1.DataTable对象" %>

<!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></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <table border="1" width="400">
    <tr><td>编号</td><td>用户名</td><td>生日</td></tr>
    <%  ShowData();
         %>
    </table>
    </div>
    </form>
</body>
</html>

CS代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

namespace WebApplication1
{
    public partial class DataTable对象 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        protected void CreateDataTable()
        {
            //实例化DataTable
            DataTable data = new DataTable();
            //创建一个名为“ID”的列，值类型为int
            DataColumn dc1 = new DataColumn("ID", typeof(int));
            dc1.AllowDBNull = false;//不许为空
            dc1.AutoIncrement = true;//自动增长
            dc1.AutoIncrementSeed = 1;//列的起值为1
            dc1.AutoIncrementStep = 1;//步长为1
            data.Columns.Add(dc1);//添加到表中

            //创建一个新UserName ，string类型的列
            DataColumn dc = new DataColumn("UserName", typeof(string));
            dc.Unique = true;//设置唯一索引
            dc.MaxLength = 20;
            data.Columns.Add(dc);

            dc = new DataColumn("Birthday", typeof(DateTime));
            dc.DefaultValue = DateTime.Now.AddYears(-2000);
            data.Columns.Add(dc);

            DataRow row =data.NewRow();//得到与刚才创建的表具有相同结构的行
            row["UserName"] = "李四";
            data.Rows.Add(row);//添加行

            row = data.NewRow();
            row["UserName"] = "王五";
            row["Birthday"] = new DateTime(1, 3, 4);
            data.Rows.Add(row);

            row = data.NewRow();
            row["UserName"] = "赵五";
            row["Birthday"] = new DateTime(6, 7, 11);
            data.Rows.Add(row);

            Session["Data"] = data;

        }
        protected void ShowData()
        {
            if (Session["Data"] == null)
            {
                CreateDataTable();
            }
            DataTable data = (DataTable)Session["data"];
            for (int i = 0; i < data.Rows.Count; i++)
            {
                Response.Write("<tr>");
                Response.Write("<td>" + data.Rows[i]["ID"].ToString() + "</td>");
                Response.Write("<td>" + data.Rows[i]["UserName"].ToString() + "</td>");
                Response.Write("<td>" + DateTime.Parse(data.Rows[i]["Birthday"].ToString()).ToShortDateString() + "</td>");
                Response.Write("</tr>");
            }
        }
    }
}

图片显示：

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原文地址：https://www.cnblogs.com/ai394495243/p/3343429.html