資料庫讀寫 CDataBase

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Data;

using System.Data.SqlClient;

namespace SelectCourse

{

    class CDataBase

    {

        public static string connStr;

        public static SqlConnection conn = new SqlConnection

        public static DataSet GetDataFromDB(string sqlStr)

        {

            conn.ConnectionString = connStr;

            conn.Open();

            SqlDataAdapter myAdapter = new SqlDataAdapter(sqlStr, conn);

            DataSet myDataSet = new DataSet();

            myDataSet.Clear();

            myAdapter.Fill(myDataSet);

            conn.Close();

            if (myDataSet.Tables[0].Rows.Count != 0)

            {

                return myDataSet;

            }

            else

            {

                return null;

            }

        }

 public static bool UpdateDB(string

        {

            conn.Open();

            SqlCommand myCmd = new SqlCommand(sqlStr, conn);// 定義資料庫的命令物件

            myCmd.CommandType = CommandType.Text;// 設定command的commandtyle屬性

            myCmd.ExecuteNonQuery();//執行SQL語句

            conn.Close();

            return true;// 資料更新成功，返回true 

        }

    }   

}