using System; using System.Data; using System.Data.SqlClient; using System.Configuration; using System.Collections; 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 Default5 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { test(); } public void test() { DataTable dt = new DataTable(); dt.Columns.Add("id",typeof(int )); dt.Columns.Add("name",typeof(string)); DataRow dr; for (int i = 1; i <= 10;i++ ) { dr = dt.NewRow(); dr["id"] = i.ToString(); dr["name"] = "test" + i.ToString(); dt.Rows.Add(dr ); } DataRow [] dRow =dt.Select("id<5"); for (int i = 0; i < dRow.Length; i++) { Response.Write("id="+dRow[i]["id"].ToString()+"name="+dRow[i]["name"].ToString()); Response.Write("<br>"); } } } 结果 id=1name=test1 id=2name=test2 id=3name=test3 id=4name=test4
using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections;
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 Default5 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
test();
}
public void test()
{
DataTable dt = new DataTable();
dt.Columns.Add("id",typeof(int ));
dt.Columns.Add("name",typeof(string));
DataRow dr;
for (int i = 1; i <= 10;i++ )
{
dr = dt.NewRow();
dr["id"] = i.ToString();
dr["name"] = "test" + i.ToString();
dt.Rows.Add(dr );
}
DataRow [] dRow =dt.Select("id<5");
for (int i = 0; i < dRow.Length; i++)
{
Response.Write("id="+dRow[i]["id"].ToString()+"name="+dRow[i]["name"].ToString());
Response.Write("<br>");
}
}
}
结果
id=1name=test1
id=2name=test2
id=3name=test3
id=4name=test4