个人数据库操作类提供下载

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using System;
using System.Configuration;
using System.Data;
using System.Data.OleDb;
using System.Web;
using System.Web.UI;
using System.Xml;
using System.IO;
using System.Web.UI.WebControls;
namespace lyapp
{
 #region OperatorAcc类 对Access数据库的操作类
 /// <summary>
 /// 定义静态方法:ExecuteDataSet()||ExecuteDataTable()||ExecuteNonQuery()||ExecuteScalar()
 /// 功能强大的Reader()
 /// </summary>
 public class OperatorAcc : Page
 {
  // Statics
  public static OleDbConnection ConnAcc;
  public static OleDbDataReader dr;
  public static string DataAcc;
  public static string DataAccConStr;
  
  // Constructors
  static OperatorAcc ()
  {
   //OperatorDataLink由Web.config添加<add key="OperatorDataLink"  value="News.mdb"/>
   OperatorAcc.DataAcc = ConfigurationSettings.AppSettings["OperatorDataLink"];
   DataAccConStr="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + HttpContext.Current.Server.MapPath(OperatorAcc.DataAcc) + ";";
  }

  public OperatorAcc()
  {
  }
  
  
  // Methods
  public static void Open ()
  {
   OperatorAcc.ConnAcc = new OleDbConnection(DataAccConStr);
   if (OperatorAcc.ConnAcc.State == ConnectionState.Closed)
   {
    OperatorAcc.ConnAcc.Open();
   }
  }
  
  public static void Close ()
  {
   OperatorAcc.ConnAcc.Close();
   OperatorAcc.ConnAcc.Dispose();
   OperatorAcc.ConnAcc = null;
  }
  
  public static DataSet ExecuteDataSet (string sql, int startindex, int num, string dataname)
  {
   OperatorAcc.Open();
   DataSet dataSet = new DataSet();
   new OleDbDataAdapter(sql, OperatorAcc.ConnAcc).Fill(dataSet, startindex, num, dataname);
   OperatorAcc.Close();
   return dataSet;
  }
  
  public static DataSet ExecuteDataSet (string sql)
  {
   OperatorAcc.Open();
   DataSet dataSet = new DataSet();
   new OleDbDataAdapter(sql, OperatorAcc.ConnAcc).Fill(dataSet);
   OperatorAcc.Close();
   return dataSet;
  }

  public static DataTable ExecuteDataTable (string sql)
  {
   OperatorAcc.Open();
   DataTable dt = new DataTable();
   new OleDbDataAdapter(sql, OperatorAcc.ConnAcc).Fill(dt);
   OperatorAcc.Close();
   return dt;
  }

  public static void ExecuteNonQuery (string sql)
  {
   OperatorAcc.Open();
   new OleDbCommand(sql, OperatorAcc.ConnAcc).ExecuteNonQuery();
   OperatorAcc.Close();
  }
  
  public static object ExecuteScalar (string SQL, int i)
  {
   OperatorAcc.Open();
   OleDbCommand command1 = new OleDbCommand(SQL, OperatorAcc.ConnAcc);
   if (i == 1)
   {
    int num1 = (int) command1.ExecuteScalar();
    OperatorAcc.Close();
    return num1;
   }
   double num2 = (double) command1.ExecuteScalar();
   OperatorAcc.Close();
   return num2;
  }  
 

  #region Reader方法 以一行一行的形式返回sql语句 ||可以指定返回的行数,列数,也可以是全部行||
  public static string [,] Reader(string sql,int num,int filedsCount,string [] filedsNames)
  {
   OperatorAcc.Open();
   OleDbCommand cmd=new OleDbCommand(sql,OperatorAcc.ConnAcc);
   dr=cmd.ExecuteReader();
   int length=dr.FieldCount;
   string [,] aa;
   if (num!=0)
   {
    aa=new string[num,filedsCount]; 
   }
   else
   {
    aa=new string[2,filedsCount]; 
   }
   int i=0,j=0;
   if(i!=num) 
   {
    while (dr.Read()&&i<num)
    {  
     while (j<filedsNames.Length)
     {
      aa[i,j]=dr[filedsNames[j]].ToString();
      j++;
     }
     j=0;
     i++;
    }
   }
   else
   {
    while (dr.Read())
    {  
     while (j<filedsNames.Length)
     {
      if(i>=aa.GetLength(0))
      Add(ref aa);    
      aa[i,j]=dr[filedsNames[j]].ToString();
      j++;
     }
     j=0;
     i++;
    }
   }
   dr.Close();
   OperatorAcc.Close();
   return aa;
  }

  
  public static void Add(ref string[,] myStrings)  
  {  
   int   rowCount   =   myStrings.GetLength(0);  
   int   colCount   =   myStrings.GetLength(1);  
   string[,]   temp   =   new   string[rowCount+1,   colCount];  
   
   for(int i=0;i<rowCount;i++)  
    for(int j=0;j<colCount;j++)  
     temp[i,j]=myStrings[i,j];                 
   myStrings=temp;

  }  
  #endregion

 }
 #endregion

 #region Access类 实现对Access数据库实例的操作
 /// <summary>
 /// 公共方法:Create()||Compact()||Backup()||Recover()
 /// ||调用||创建实例:命名空间.类名.方法|| lyapp.Access.Back()
 /// </summary>
 public class Access:Page
 {
  ///根据指定的文件名称创建ACCESS数据库
  ///mdbPath:要创件的ACCESS绝对路径
  public void Create( string mdbPath )
  {
   if(File.Exists(mdbPath) ) //检查数据库是否已存在
   {
    throw new Exception("目标数据库已存在,无法创建");
   }
   // 可以加上密码,这样创建后的数据库必须输入密码后才能打开
   mdbPath = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath;
   // 创建一个CatalogClass对象的实例,
   ADOX.CatalogClass cat = new ADOX.CatalogClass();
   // 使用CatalogClass对象的Create方法创建ACCESS数据库
   cat.Create(mdbPath);
  }

  ///压缩修复ACCESS数据库,mdbPath为数据库绝对路径
  public void Compact( string mdbPath )
  {
   if( !File.Exists(mdbPath) ) //检查数据库是否已存在
   {
    throw new Exception("目标数据库不存在,无法压缩");
   }
   //声明临时数据库的名称
   string temp = DateTime.Now.Year.ToString();
   temp += DateTime.Now.Month.ToString();
   temp += DateTime.Now.Day.ToString();
   temp += DateTime.Now.Hour.ToString();
   temp += DateTime.Now.Minute.ToString();
   temp += DateTime.Now.Second.ToString() + ".bak";
   temp = mdbPath.Substring(0, mdbPath.LastIndexOf("\\")+1) + temp;
   //定义临时数据库的连接字符串
   string temp2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + temp;
   //定义目标数据库的连接字符串
   string mdbPath2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath;
   //创建一个JetEngineClass对象的实例
   JRO.JetEngineClass jt = new JRO.JetEngineClass();
   //使用JetEngineClass对象的CompactDatabase方法压缩修复数据库
   jt.CompactDatabase( mdbPath2, temp2 );
   //拷贝临时数据库到目标数据库(覆盖)
   File.Copy( temp, mdbPath, true );
   //最后删除临时数据库
   File.Delete( temp );
  }

  /// 备份数据库,mdb1,源数据库绝对路径; mdb2: 目标数据库绝对路径
  public void Backup( string mdb1, string mdb2 )
  {
   if( !File.Exists(mdb1) )
   {
    throw new Exception("源数据库不存在");
   }
   try
   {
    File.Copy( mdb1, mdb2, true );
   }
   catch( IOException ixp )
   {
    throw new Exception(ixp.ToString());
   }
  }

  ///恢复数据库,mdb1为备份数据库绝对路径,mdb2为当前数据库绝对路径
  public void Recover( string mdb1, string mdb2 )
  {
   if( !File.Exists(mdb1) )
   {
    //throw new Exception("备份数据库不存在");
    Response.Write("<script language='javascript'>alert('备份数据库不存在！');</script>");
   }
   try
   {
    File.Copy( mdb1, mdb2, true );
   }
   catch( IOException ixp )
   {
    throw new Exception(ixp.ToString());
   }
  }
 }
 #endregion

 public class OOP:Page
 {
  private void GetPictureNames(DropDownList lbxPictures) //using System.Web.UI.WebControls;
  {
   string [] pictureNameList;
   string pictureDir = Server.MapPath("images");
   pictureNameList = Directory.GetFiles(pictureDir);
   lbxPictures.Items.Clear();
   foreach (string currentFileName in pictureNameList)
   {
    //Response.Write(currentFileName.ToString());
    lbxPictures.Items.Add(currentFileName.Substring(currentFileName.LastIndexOf("\\") + 1));
   }
  }
 }
}