ADO.Net中DataSet的应用

 1 DataSet PubsSet = new DataSet();
 2 SqlConnection ConnPubs;
 3 DataSet ds = new DataSet();
 4 
 5         private void frm_PatientInformationManage_Load(object sender, EventArgs e)
 6         {
 7 
 8             ConnPubs = new SqlConnection(); //声明并实例化SQL连接；
 9             ConnPubs.ConnectionString =
10                 ConfigurationManager.ConnectionStrings["Sql"].ConnectionString;             //在字符串变量中，描述连接字符串所需的服务器地址、数据库名称、集成安全性（即是否使用Windows验证）；
11             SqlCommand sqlCommand = new SqlCommand();                                       //声明并实例化SQL命令；
12             sqlCommand.Connection = ConnPubs;
13             sqlCommand.CommandText = "select P_id as 医疗卡号,P_name as 姓名 ,P_sex as 性别,P_birthday as 生日,P_nation as 民族,Feetype as 付费类型,P_tel as 电话,P_pym as 拼音码,P_address as 地址,P_career as 职业,P_bloodtype  as 血型,P_allergic as 过敏药物,P_idcard as 身份证号,P_Photo from tb_patient";
14 
15             ConnPubs.Open();
16             SqlDataAdapter da = new SqlDataAdapter();
17             da.SelectCommand = sqlCommand;
18             da.Fill(PubsSet, "tb_patient");
19             dataGridView1.DataSource = PubsSet.Tables["tb_patient"];
20            
21             this.dataGridView1.Columns["P_Photo"].Visible = false;   //隐藏照片列
22 
23             SqlDataAdapter sqlDataAdapter = new SqlDataAdapter();                                           //声明并实例化SQL数据适配器，同时借助构造函数，将其SelectCommand属性设为先前创建的SQL命令；
24             sqlDataAdapter.SelectCommand = sqlCommand;                                                      //将SQL数据适配器的查询命令属性指向SQL命令；
25             DataTable tb_patient = new DataTable();                                                         //声明并实例化数据表，用于保存所有班级，以用作下拉框数据源；
26                                                                                   
27             sqlDataAdapter.Fill(tb_patient);                                                                //SQL数据适配器读取数据，并填充班级数据表；
28             this.cmb_SearchPYM .DataSource = tb_patient;                                                         //将班级下拉框的数据源设为班级数据表；
29            // this.cmb_SearchPYM.DisplayMember = "P_pym";                                                          //将班级下拉框的显示成员设为班级数据表的名称列；
30             this.cmb_SearchId .DataSource = tb_patient; 
31            // this.cmb_SearchId.DisplayMember = "P_id";
32             this.cmb_SearchId.DisplayMember = "医疗卡号";
33             this.cmb_SearchPYM.DisplayMember = "拼音码"; 
34             //this.cmb_SearchPYM.ValueMember = "U_id";   
35 
36        
37         }