ado.net工厂模式DbProviderFactories
DbProviderFactory f = DbProviderFactories.GetFactory(System.Configuration.ConfigurationManager.ConnectionStrings["ado"].ProviderName); DbConnection conn = f.CreateConnection(); conn.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ado"].ConnectionString; conn.Open(); DbCommand cmd = f.CreateCommand(); cmd.CommandText = "select * from student"; cmd.Connection = conn; DbDataReader re = cmd.ExecuteReader(); while (re.Read()) { int id = (int)re["StuId"]; string name = (string)re["StuName"]; int age = (int)re["StuAge"]; ListViewItem item = new ListViewItem(); item.Text = id.ToString(); item.SubItems.Add( new ListViewItem.ListViewSubItem { Text = name } ); item.SubItems.Add( new ListViewItem.ListViewSubItem { Text = age.ToString() } ); listView1.Items.Add(item); } re.Close(); conn.Close();
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