DataTable行状态与行版本

Default.aspx

View Code

<%@ Page Language="C#" AutoEventWireup="true"  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>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="GridView1" runat="server">
        </asp:GridView>
    </div>
    </form>
</body>
</html>

Default.aspx.cs

View Code

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;

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

        DataSet ds = new DataSet();//创建数据集
        string conStr = ConfigurationManager.ConnectionStrings["conStr"].ToString();
        using (SqlConnection con = new SqlConnection(conStr))//创建数据连接
        {
            con.Open();//打开连接
            SqlDataAdapter sda = new SqlDataAdapter("select * from UserInfo", con);//创建数据适配器
            sda.Fill(ds, "UserInfo");//填充数据集
        }
        //第一行的UserName列值由"系统管理员"改为"temp"
        ds.Tables["UserInfo"].Rows[0]["UserName"] = "temp";
        //取第一行的UserName列的原值是"系统管理员"
        string s = ds.Tables["UserInfo"].Rows[0]["UserName", DataRowVersion.Original].ToString();
        //删除第二、第三行
        ds.Tables["UserInfo"].Rows[2].Delete();
        ds.Tables["UserInfo"].Rows[1].Delete();
        //取出行状态是删除的行，也就是第二、第三行
        DataRow[] delRows = ds.Tables["UserInfo"].Select("", "", DataViewRowState.Deleted);
        //在页面中输出行状态是删除的行集合
        foreach (DataColumn col in ds.Tables["UserInfo"].Columns)
        {
            Response.Write(col.ColumnName + "&nbsp;&nbsp;");
        }
        Response.Write("<br/>");
        foreach (DataRow row in delRows)
        {
            foreach (DataColumn col in ds.Tables["UserInfo"].Columns)
            {
                Response.Write(row[col, DataRowVersion.Original].ToString() + "&nbsp;&nbsp;&nbsp;&nbsp;");
            }
            Response.Write("<br/>");
        }
    }


}

posted on 2013-03-18 07:10 松竹梅阅读(1141) 评论(0) 编辑收藏举报