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();