ADO.NET 增删查改小总结

转自：http://www.cnblogs.com/ashu123/archive/2010/10/10/ado_1.html

三套路-----增删改

 1 using System.Data.SqlClient;
 2 
 3             SqlConnection conn =new SqlConnection("xxx");
 4 
 5 
 6 string sql ="xxx";
 7 
 8             SqlCommand comm =new SqlCommand(sql, conn);
 9 
10             conn.Open();
11 
12             comm.ExecuteNonQuery();
13 
14             conn.Close();

三套路-----查（绑定到DataGridView

 1 using System.Data.SqlClient;
 2 
 3             SqlConnection conn =new SqlConnection("xxx");
 4 
 5 string sql ="xxx";
 6 
 7             SqlDataAdapter da =new SqlDataAdapter(sql, conn);
 8 
 9             DataSet ds =new DataSet();
10 
11             da.Fill(ds);
12 
13             dataGridView1.DataSource = ds.Tables[0];
14 
15 //要更新 查询语句要 查询主键列
16  
17             SqlCommandBuilder sd =new SqlCommandBuilder(da);
18 
19             da.Update(ds.Tables[0]);

三套路----查（绑定到ListView）

using System.Data.SqlClient;

            SqlConnection conn =new SqlConnection("xxx");

            string sql ="xx";

            SqlCommand comm =new SqlCommand(sql, conn);

            conn.Open();

            SqlDataReader read = comm.ExecuteReader();

            while (read.Read())
            {
                ListViewItem lvi =new ListViewItem(read["xxx"].ToString());

                lvi.Tag = read["id"];

                listView1.Items.Add(lvi);

                lvi.SubItems.AddRange(new String[] { read["xxx"].ToString() });
            }

            read.Close();
            conn.Close();