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();