C#操作ACCESS的一些常用类

using System;
using System.Configuration;
using System.Collections;
using System.Data;
using System.Data.OleDb;
namespace MyData
{
     public  static  class Class_oledb_conn
    {
         // public static string ConnStr = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=DataBase/*.mdb;";
         public  static  string ConnStr = MyData.Properties.Settings.Default.my_soft_oledbConn;
         // 打开数据库链接
         public  static OleDbConnection Open_Conn( string ConnStr)
        {
            OleDbConnection Conn =  new OleDbConnection(ConnStr);
            Conn.Open();
             return Conn;
        }
         // 关闭数据库链接
         public  static  void Close_Conn(OleDbConnection Conn)
        {
             if (Conn !=  null)
            {
                Conn.Close();
                Conn.Dispose();
            }
            GC.Collect();
        }
         // 运行OleDb语句
         public  static  int Run_SQL( string SQL,  string ConnStr)
        {
            OleDbConnection Conn = Open_Conn(ConnStr);
            OleDbCommand Cmd = Create_Cmd(SQL, Conn);
             try
            {
                 int result_count = Cmd.ExecuteNonQuery();
                Close_Conn(Conn);
                 return result_count;
            }
             catch
        {
            Close_Conn(Conn);
                 return  0;
            }
        }
         //  生成Command对象
         public  static OleDbCommand Create_Cmd( string SQL, OleDbConnection Conn)
        {
            OleDbCommand Cmd =  new OleDbCommand(SQL, Conn);
             return Cmd;
        }
         //  运行OleDb语句返回 DataTable
         public  static DataTable Get_DataTable( string SQL,  string ConnStr,  string Table_name)
        {
            OleDbDataAdapter Da = Get_Adapter(SQL, ConnStr);
            DataTable dt =  new DataTable(Table_name);
            Da.Fill(dt);
             return dt;
        }
         //  运行OleDb语句返回 OleDbDataReader对象
         public  static OleDbDataReader Get_Reader( string SQL,  string ConnStr)
        {
            OleDbConnection Conn = Open_Conn(ConnStr);
            OleDbCommand Cmd = Create_Cmd(SQL, Conn);
            OleDbDataReader Dr;
             try
            {
                Dr = Cmd.ExecuteReader(CommandBehavior.Default);
            }
             catch
        {
             throw  new Exception(SQL);
            }
            Close_Conn(Conn);
             return Dr;
        }
         //  运行OleDb语句返回 OleDbDataAdapter对象
         public  static OleDbDataAdapter Get_Adapter( string SQL,  string ConnStr)
        {
            OleDbConnection Conn = Open_Conn(ConnStr);
            OleDbDataAdapter Da =  new OleDbDataAdapter(SQL, Conn);
             return Da;
        }
         //  运行OleDb语句,返回DataSet对象
         public  static DataSet Get_DataSet( string SQL,  string ConnStr, DataSet Ds)
        {
            OleDbDataAdapter Da = Get_Adapter(SQL, ConnStr);
             try
            {
                Da.Fill(Ds);
            }
             catch (Exception Err)
            {
                 throw Err;
            }
             return Ds;
        }
         //  运行OleDb语句,返回DataSet对象
         public  static DataSet Get_DataSet( string SQL,  string ConnStr, DataSet Ds,  string tablename)
        {
            OleDbDataAdapter Da = Get_Adapter(SQL, ConnStr);
             try
            {
                Da.Fill(Ds, tablename);
            }
             catch (Exception Ex)
            {
                 throw Ex;
            }
             return Ds;
        }
         //  运行OleDb语句,返回DataSet对象，将数据进行了分页
         public  static DataSet Get_DataSet( string SQL,  string ConnStr, DataSet Ds,  int StartIndex,  int PageSize,  string tablename)
        {
            OleDbConnection Conn = Open_Conn(ConnStr);
            OleDbDataAdapter Da = Get_Adapter(SQL, ConnStr);
             try
            {
                Da.Fill(Ds, StartIndex, PageSize, tablename);
            }
             catch (Exception Ex)
            {
                 throw Ex;
            }
            Close_Conn(Conn);
             return Ds;
        }
         //  返回OleDb语句执行结果的第一行第一列
         public  static  string Get_Row1_Col1_Value( string SQL,  string ConnStr)
        {
            OleDbConnection Conn = Open_Conn(ConnStr);
             string result;
            OleDbDataReader Dr;
             try
            {
                Dr = Create_Cmd(SQL, Conn).ExecuteReader();
                 if (Dr.Read())
                {
                    result = Dr[ 0].ToString();
                    Dr.Close();
                }
                 else
                {
                    result =  "";
                    Dr.Close();
                }
            }
             catch
        {
             throw  new Exception(SQL);
            }
            Close_Conn(Conn);
             return result;
        }
    }
}

 

------------------------------------------------------------------
app.config 里的数据库链接字符串
------------------------------------------------------------------

<?xml version= " 1.0 " encoding= " utf-8 " ?>
<configuration>
<configSections>
</configSections>
<connectionStrings>
<add name= " MyData.Properties.Settings.my_soft_oledbConn " connectionString= " Provider=Microsoft.Jet.OLEDB.4.0;Data Source=数据库路径\*.mdb "
providerName= " System.Data.OleDb " />
</connectionStrings>
</configuration>