**

以下是获取数据库数据的两种写法：

**

string dataSource = this.tbx_source.Text.Trim(); //输入连接的数据库
            string userId = this.tbx_ID.Text.Trim();         //数据库用户
            string password = this.tbx_password.Text.Trim(); //密码
            string connectString = "Data Source=" + dataSource + ";user id=" + userId + ";password=" + password + ";Unicode=True"; //连接字符串
            OracleConnection conn = new OracleConnection(connectString);//构建连接类
            string selectCommand = "select * from infos";      //sql语句
            OracleDataReader reader = null;
            try
            {
                conn.Open();                                   //打开orcle的连接
                OracleCommand command = new OracleCommand(selectCommand, conn);
                // 捆绑方法之一，利用BindingSource
                reader = command.ExecuteReader(); //执行sql语句
                //BindingSource bs = new BindingSource();            //捆绑源
                //bs.DataSource = reader;                            //捆绑执行结果
                //this.dataGridView1.DataSource = bs;                 //将datagridview与dataReader捆绑
 
                //捆绑方法之二，利用datatable
                DataTable table = new DataTable();
                table.Load(reader);                            //将执行结果导入表中
                this.dataGridView1.DataSource = table;         //捆绑数据
               
            }
            catch (Exception ex1)
            {
                MessageBox.Show("获取数据失败");
            }
 
            finally
            {
                reader.Close();   
                conn.Close();
            }
--------------------- 
作者：lzmings 
来源：CSDN 
原文：https://blog.csdn.net/lzmings/article/details/44115957 
版权声明：本文为博主原创文章，转载请附上博文链接！