數據庫連接

private void button1_Click(object sender, EventArgs e) { SqlConnection Conn = new SqlConnection("Server=192.168.2.10;Database=Fly;uid=sa;pwd=***"); Conn.Open(); SqlCommand cmd = new SqlCommand(); cmd.CommandText = "INSERT INTO [Fly].[dbo].[A](ID,ID_Name)VALUES('E','E項目')"; cmd.Connection = Conn; cmd.ExecuteNonQuery();//這個僅僅執行SQL命令，不返回結果集，實用於建表、批量更新 Conn.Close(); // 關閉數據庫連接 } //------------------------------------------------------------------------------------------------------------------------------ private void button2_Click(object sender, EventArgs e) { String connsql = "Server=192.168.2.10;Database=Fly;uid=sa;pwd=***"; // 數據庫連接字符串,database設置爲自己的數據庫名，以Windows身份驗證 try { using (SqlConnection conn = new SqlConnection()) { conn.ConnectionString = connsql; conn.Open(); // 打開數據庫連接 String sql = "select * from Fly..A"; // 查詢語句 SqlDataAdapter myda = new SqlDataAdapter(sql, conn); // 實例化適配器 DataTable dt = new DataTable(); // 實例化數據表 myda.Fill(dt); // 保存數據 dataGridView1.DataSource = dt; // 設置到DataGridView中 conn.Close(); // 關閉數據庫連接 } } catch (Exception ex) { MessageBox.Show("錯誤信息：" + ex.Message, "出現錯誤"); } }