原文发布时间为:2008-08-01 —— 来源于本人的百度文章 [由搬家工具导入]
SqlDataAdapter:(它是自动打开连接且自动关闭的,所以可以不必显示打开关闭连接)
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["pusConn"].ConnectionString);
// SqlDataAdapter sda = new SqlDataAdapter("select * from authors", conn);//第一种写法
SqlDataAdapter sda = new SqlDataAdapter();//第二种写法
sda.SelectCommand = new SqlCommand("select * from authors",conn);
DataSet ds = new DataSet();
sda.Fill(ds,"t1");
----------------------------
SqlCommand:
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["pusConn"].ConnectionString);
//SqlCommand cmd=new SqlCommand("delete from authors where au_id=2",conn);//第一种方法
SqlCommand cmd=new SqlCommand();//第二种方法
cmd.CommandText = "delete from authors where au_id=2" ;
cmd.Connection = conn;
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();