[C#]ACCESS操作类

using System;
using System.Collections.Generic;
using System.Data.OleDb;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CMS.Common
{
    public static class AccessDBhelper
    {
        private static string DBPath = CMSConfig.DBPath;
        private static OleDbConnection Con;
        private static OleDbCommand Com;

        /// <summary>
        /// 初始化连接实例
        /// </summary>
        private static void AccessC()
        {
            Con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source =" + DBPath);
            Com = new OleDbCommand();
        }

        /// <summary>
        /// 执行SQL语句并返回所影响的行数
        /// </summary>
        /// <param name="sqlCommand"></param>
        /// <returns></returns>
        public static int cExecuteNonQuery(string sqlCommand)
        {
            try
            {
                AccessC();
                Com.CommandText = sqlCommand;
                Com.Connection = Con;
                Con.Open();
                int i = 0;
                i = Com.ExecuteNonQuery();
                CloseCon();
                return i;
            }
            catch (Exception e)
            {
                throw new System.ArgumentException("错误", e.Message);
            }
        }

        /// <summary>
        /// 执行SQL语句并返回所影响的行数
        /// </summary>
        /// <param name="sqlCommand"></param>
        /// <param name="paras"></param>
        /// <returns></returns>
        public static int cExecuteNonQuery(string sqlCommand,OleDbParameter[] paras)
        {
            try
            {
                AccessC();
                Com.CommandText = sqlCommand;
                FillParameter(paras);
                Com.Connection = Con;
                Con.Open();
                int i = 0;
                i = Com.ExecuteNonQuery();
                CloseCon();
                return i;
            }
            catch (Exception e)
            {
                throw new System.ArgumentException("错误", e.Message);
            }
        }

        private static void FillParameter(OleDbParameter[] paras)
        {
            foreach (OleDbParameter item in paras)
            {
                Com.Parameters.Add(item);
            }
        }

        /// <summary>
        /// 统计特定条件的数量
        /// </summary>
        /// <param name="sqlCommand"></param>
        /// <returns></returns>
        public static int cExecteCount(string sqlCommand)
        {
            try
            {
                AccessC();
                Com.CommandText = sqlCommand;
                Com.Connection = Con;
                Con.Open();
                int i = 0;
                i = (int)Com.ExecuteScalar();
                CloseCon();
                return i;
            }
            catch (Exception e)
            {
                throw new System.ArgumentException("错误", e.Message);
            }
        }

        /// <summary>
        /// 统计特定条件的数量
        /// </summary>
        /// <param name="sqlCommand"></param>
        /// <param name="paras"></param>
        /// <returns></returns>
        public static int cExecteCount(string sqlCommand,OleDbParameter[] paras)
        {
            try
            {
                AccessC();
                Com.CommandText = sqlCommand;
                FillParameter(paras);
                Com.Connection = Con;
                Con.Open();
                int i = 0;
                i = (int)Com.ExecuteScalar();
                CloseCon();
                return i;
            }
            catch (Exception e)
            {
                throw new System.ArgumentException("错误", e.Message);
            }
        }
       
        /// <summary>
        /// 执行SQL语句，并返回查询结果集的第一行的第一列
        /// </summary>
        /// <param name="sqlCommand"></param>
        /// <returns></returns>
        public static object cExecuteScalar(string sqlCommand)
        {
            try
            {
                AccessC();
                Com.CommandText = sqlCommand;
                Com.Connection = Con;
                Con.Open();
                object o = null;
                o = (object)Com.ExecuteScalar();
                CloseCon();
                return o;
            }
            catch (Exception e)
            {
                throw new System.ArgumentException("错误", e.Message);
            }
        }

        /// <summary>
        /// 执行SQL语句，并返回查询结果集的第一行的第一列
        /// </summary>
        /// <param name="sqlCommand"></param>
        /// <param name="paras"></param>
        /// <returns></returns>
        public static object cExecuteScalar(string sqlCommand,OleDbParameter[] paras)
        {
            try
            {
                AccessC();
                Com.CommandText = sqlCommand;
                FillParameter(paras);
                Com.Connection = Con;
                Con.Open();
                object o = null;
                o = (object)Com.ExecuteScalar();
                CloseCon();
                return o;
            }
            catch (Exception e)
            {
                throw new System.ArgumentException("错误", e.Message);
            }
        }

        /// <summary>
        /// 执行SQL语句并返回DataTable
        /// </summary>
        /// <param name="sqlCommand"></param>
        /// <returns></returns>
        public static DataTable cExecuteGetTable(string sqlCommand)
        {
            try
            {
                AccessC();
                DataTable dt = new DataTable();
                Com.CommandText = sqlCommand;
                Com.Connection = Con;
                OleDbDataAdapter dad = new OleDbDataAdapter(Com);
                dad.Fill(dt);
                CloseCon();
                return dt;
            }
            catch (Exception e)
            {
                throw new System.ArgumentException("错误", e.Message);
            }
        }

        /// <summary>
        /// 执行SQL语句并返回DataTable
        /// </summary>
        /// <param name="sqlCommand"></param>
        /// <param name="paras"></param>
        /// <returns></returns>
        public static DataTable cExecuteGetTable(string sqlCommand,OleDbParameter[] paras)
        {
            try
            {
                AccessC();
                DataTable dt = new DataTable();
                Com.CommandText = sqlCommand;
                FillParameter(paras);
                Com.Connection = Con;
                OleDbDataAdapter dad = new OleDbDataAdapter(Com);
                dad.Fill(dt);
                CloseCon();
                return dt;
            }
            catch (Exception e)
            {
                throw new System.ArgumentException("错误", e.Message);
            }
        }

        /// <summary>
        /// 关闭连接
        /// </summary>
        private static void CloseCon()
        {
            Com.Dispose();
            Con.Close();
        }
    }
}