ADO.NET 增删查改小总结

三套路-----增删改

Code

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

Code

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）

代码

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();

转载于:https://www.cnblogs.com/ashu123/archive/2010/10/10/ado_1.html