using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Text;
using?System.Windows.Forms;
using?System.Data.SqlClient;

namespace?LinqShowDS
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?Form1_Load（object?sender?EventArgs?e）
????????{
????????????string?strCon?=?“Data?Source=（local）;Database=db_18;Uid=sa;Pwd=;“;//定義數(shù)據(jù)庫連接字符串
????????????SqlConnection?sqlcon;//聲明SqlConnection對(duì)象
????????????SqlDataAdapter?sqlda;//聲明SqlDataAdapter對(duì)象
????????????DataSet?myds;//聲明DataSet數(shù)據(jù)集對(duì)象
????????????sqlcon?=?new?SqlConnection（strCon）;//實(shí)例化數(shù)據(jù)庫連接對(duì)象
????????????sqlda?=?new?SqlDataAdapter（“select?*?from?tb_Salary“?sqlcon）;//實(shí)例化數(shù)據(jù)庫橋接器對(duì)象
????????????myds?=?new?DataSet（）;//實(shí)例化數(shù)據(jù)集對(duì)象
????????????sqlda.Fill（myds?“tb_Salary“）;//填充DataSet數(shù)據(jù)集
????????????var?query?=?from?salary?in?myds.Tables[“