數據庫操作類——C#

整理數據庫操作類以便取用:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace Eshop
{
    public class DbManage
    {
        #region 類中的全局變量-數據連接字符串
        public static string strcon = ConfigurationManager.ConnectionStrings["ApplicationServices"].ConnectionString.ToString();//連接字符串，使用Windows登錄方式
        #endregion

        #region 構造函數
        /// <summary>
        /// 構造函數，初始化時連接數據庫
        /// </summary>
        public DbManage()
        {
            strcon = ConfigurationManager.ConnectionStrings["ApplicationServices"].ConnectionString.ToString();
        }
        #endregion

        #region 返回SqlDataReader-ExceRead類型的數據
        /// <summary>
        /// 此方法返回SqlDataReader-ExceRead類型的參數
        /// </summary>
        /// <param name="Sqlcom"></param>
        /// <returns></returns>
        public static SqlDataReader ExceRead(string Sqlcom)
        {
            SqlConnection con = new SqlConnection(strcon);
            try
            {
                con.Open();
                SqlCommand com = new SqlCommand(Sqlcom,con);
                SqlDataReader read = com.ExecuteReader();

                return read;
            }
            catch (SqlException E)
            {
                
                throw new Exception(E.Message);
            }
        }
        #endregion

        #region 返回SqlDataReader-ExceScalar類型的數據
        /// <summary>
        /// 此方法返回SqlDataReader-ExceScalar類型的參數
        /// </summary>
        /// <param name="Sqlcom"></param>
        /// <returns></returns>
        public static object ExceScalar(string Sqlcom)
        {
            SqlConnection con = new SqlConnection(strcon);
            try
            {
                con.Open();
                SqlCommand com = new SqlCommand(Sqlcom, con);
                object strdata = com.ExecuteScalar();
                return strdata;

            }
            catch (SqlException E)
            {

                throw new Exception(E.Message);
            }
        }
        #endregion

        #region 返回DataSet類型的數據並獲得tableName參數
        /// <summary>
        /// 此方法返回一個DataSet類型
        /// </summary>
        /// <param name="strsql">要執行的SQL語句</param>
        /// <param name="tablename"></param>
        /// <returns></returns>
        public static DataSet GetDataSet(string strsql,string tablename)
        {
            //定義一個數據集，用來賦值給應用程序的一個數據集
            SqlConnection con = new SqlConnection(strcon);
            DataSet ds = new DataSet();
            try
            {
                SqlDataAdapter DA = new SqlDataAdapter(strsql,con);
                DA.Fill(ds,tablename);
            }
            catch (SqlException E)
            {

                throw new Exception(E.Message);
            }

            return ds;
        }
        #endregion

        #region 執行SQL語句，包括增刪改
        /// <summary>
        /// 此方法用來執行SQL語句
        /// </summary>
        /// <param name="strSqlCom">要執行的SQL語句</param>
        /// <returns></returns>
        public static bool ExceSQL(string strSqlCom)
        {
            SqlConnection con = new SqlConnection(strcon);
            SqlCommand com = new SqlCommand(strSqlCom,con);

            try
            {
                //判斷數據庫是否為連接狀態
                if (con.State == ConnectionState.Closed)
                {
                    con.Open();
                }
                //執行SQL語句
                com.ExecuteNonQuery();
                //SQL語句執行成功，返回true值
                return true;
            }
            catch
            {
                //SQL語句執行失敗，返回false值
                return false;
            }
            finally
            {
                //關閉數據庫連接
                con.Close();
            }
        }
        #endregion
    }
}