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为ASP.NET封装的SQL数据库访问类

 2004-12-15 17:00:27 来源:WEB开发网   
核心提示:using System;using System.Configuration;using System.Data;using System.Data.SqlClient;using System.Collections;namespace MyCorporation.DepartMent.DataBase{ ///

using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Collections;

namespace MyCorporation.DepartMent.DataBase
{
 /// <summary>
 /// 通用数据库类
 /// </summary>
 public class DataBase
 {

  PRivate string ConnStr = null;

  public DataBase()
  {
  ConnStr = ConfigurationSettings.AppSettings["ConnStr"];
  }
  public DataBase(string Str)
  {
  try
  {
   this.ConnStr = Str;

  }
  catch(Exception ex)
  {
   throw ex;
  }
  }

  /// <summary>
  /// 返回connection对象
  /// </summary>
  /// <returns></returns>
  public SqlConnection ReturnConn()
  {
  SqlConnection Conn = new SqlConnection(ConnStr);
  Conn.Open();
  return Conn;
  }
  public void Dispose(SqlConnection Conn)
  {
  if(Conn!=null)
  {
   Conn.Close();
   Conn.Dispose();
  }
  GC.Collect();
  }
  /// <summary>
  /// 运行SQL语句
  /// </summary>
  /// <param name="SQL"></param>
  public void RunProc(string SQL)
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  SqlCommand Cmd ;
  Cmd = CreateCmd(SQL, Conn);
  try
  {
   Cmd.ExecuteNonQuery();
  }
  catch
  {
   throw new Exception(SQL);
  }
  Dispose(Conn);
  return;
  }  

  /// <summary>
  /// 运行SQL语句返回DataReader
  /// </summary>
   /// <param name="SQL"></param>
   /// <returns>SqlDataReader对象.</returns>
  public SqlDataReader RunProcGetReader(string SQL)
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  SqlCommand Cmd ;
  Cmd = CreateCmd(SQL, Conn);
  SqlDataReader Dr;
  try
  {
   Dr = Cmd.ExecuteReader(CommandBehavior.Default);
  }
  catch
  {
   throw new Exception(SQL);
  }
  //Dispose(Conn);
  return Dr;
  }

  /// <summary>
  /// 生成Command对象
  /// </summary>
  /// <param name="SQL"></param>
  /// <param name="Conn"></param>
  /// <returns></returns>
  public SqlCommand CreateCmd(string SQL, SqlConnection  Conn)
  {
  SqlCommand Cmd ;
  Cmd = new SqlCommand(SQL, Conn);
  return Cmd;
  }
 
  /// <summary>
  /// 生成Command对象
  /// </summary>
  /// <param name="SQL"></param>
  /// <returns></returns>
  public SqlCommand CreateCmd(string SQL)
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  SqlCommand Cmd ;
  Cmd = new SqlCommand(SQL, Conn);
  return Cmd;
  }

  /// <summary>
  /// 返回adapter对象
  /// </summary>
  /// <param name="SQL"></param>
  /// <param name="Conn"></param>
  /// <returns></returns>
  public SqlDataAdapter CreateDa(string SQL)
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  SqlDataAdapter Da;
  Da = new SqlDataAdapter(SQL, Conn);
  return Da;
  }

  /// <summary>
  /// 运行SQL语句,返回DataSet对象
  /// </summary>
  /// <param name="procName">SQL语句</param>
  /// <param name="prams">DataSet对象</param>
  public DataSet RunProc(string SQL ,DataSet Ds)
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  SqlDataAdapter Da;
  //Da = CreateDa(SQL, Conn);
  Da = new SqlDataAdapter(SQL,Conn);
  try
  {
   Da.Fill(Ds);
  }
  catch(Exception Err)
  {
   throw Err;
  }
  Dispose(Conn);
  return Ds;
  }

  /// <summary>
  /// 运行SQL语句,返回DataSet对象
  /// </summary>
  /// <param name="procName">SQL语句</param>
  /// <param name="prams">DataSet对象</param>
  /// <param name="dataReader">表名</param>
  public DataSet RunProc(string SQL ,DataSet Ds,string tablename)
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  SqlDataAdapter Da;
  Da = CreateDa(SQL);
  try
  {
   Da.Fill(Ds,tablename);
  }
  catch(Exception Ex)
  {
   throw Ex;
  }
  Dispose(Conn);
  return Ds;
  }

  /// <summary>
  /// 运行SQL语句,返回DataSet对象
  /// </summary>
  /// <param name="procName">SQL语句</param>
  /// <param name="prams">DataSet对象</param>
  /// <param name="dataReader">表名</param>
  public DataSet RunProc(string SQL , DataSet Ds ,int  StartIndex ,int PageSize, string tablename )
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  SqlDataAdapter Da ;
  Da = CreateDa(SQL);
  try
  {
   Da.Fill(Ds, StartIndex, PageSize, tablename);
  }
  catch(Exception Ex)
  {
   throw Ex;
  }
  Dispose(Conn);
  return Ds;
  }

  /// <summary>
  /// 检验是否存在数据
  /// </summary>
  /// <returns></returns>
  public bool ExistDate(string SQL)
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  SqlDataReader Dr ;
  Dr = CreateCmd(SQL,Conn).ExecuteReader();
  if (Dr.Read())
  {
   Dispose(Conn);
   return true;
  }
  else
  {
   Dispose(Conn);
   return false;
  }
  }

  /// <summary>
  /// 返回SQL语句执行结果的第一行第一列
  /// </summary>
  /// <returns>字符串</returns>
  public string ReturnValue(string SQL)
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  string result;
  SqlDataReader Dr ;
  try
  {
   Dr = CreateCmd(SQL,Conn).ExecuteReader();
   if (Dr.Read())
   {
   result = Dr[0].ToString();
   Dr.Close();
   }
   else
   {
   result = "";
   Dr.Close();
   }
  }
  catch
  {
   throw new Exception(SQL);
  }
  Dispose(Conn);
  return result;
  }

  /// <summary>
  /// 返回SQL语句第一列,第ColumnI列,
  /// </summary>
  /// <returns>字符串</returns>
  public string ReturnValue(string SQL, int ColumnI)
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  string result;
  SqlDataReader Dr ;
  try
  {
   Dr = CreateCmd(SQL,Conn).ExecuteReader();
  }
  catch
  {
   throw new Exception(SQL);
  }
  if (Dr.Read())
  {
   result = Dr[ColumnI].ToString();
  }
  else
  {
   result = "";
  }
  Dr.Close();
  Dispose(Conn);
  return result;
  }

  /// <summary>
  /// 生成一个存储过程使用的sqlcommand.
  /// </summary>
  /// <param name="procName">存储过程名.</param>
  /// <param name="prams">存储过程入参数组.</param>
  /// <returns>sqlcommand对象.</returns>
  public SqlCommand CreateCmd(string procName, SqlParameter[] prams)
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  SqlCommand Cmd = new SqlCommand(procName, Conn);
  Cmd.CommandType = CommandType.StoredProcedure;
  if (prams != null)
  {
   foreach (SqlParameter parameter in prams)
   {
   if(parameter != null)
   {
    Cmd.Parameters.Add(parameter);
   }
   }
  }
  return Cmd;
  }

  /// <summary>
  /// 为存储过程生成一个SqlCommand对象
  /// </summary>
  /// <param name="procName">存储过程名</param>
  /// <param name="prams">存储过程参数</param>
  /// <returns>SqlCommand对象</returns>
  private SqlCommand CreateCmd(string procName, SqlParameter[] prams,SqlDataReader Dr)
  {
  SqlConnection Conn;
  Conn = new SqlConnection(ConnStr);
  Conn.Open();
  SqlCommand Cmd = new SqlCommand(procName, Conn);
  Cmd.CommandType = CommandType.StoredProcedure;
  if (prams != null)
  {
   foreach (SqlParameter parameter in prams)
   Cmd.Parameters.Add(parameter);
  }
  Cmd.Parameters.Add(
   new SqlParameter("ReturnValue", SqlDbType.Int, 4,
   ParameterDirection.ReturnValue, false, 0, 0,
   string.Empty, DataRowVersion.Default, null));

  return Cmd;
  }

  /// <summary>
  /// 运行存储过程,返回.
  /// </summary>
  /// <param name="procName">存储过程名</param>
  /// <param name="prams">存储过程参数</param>
  /// <param name="dataReader">SqlDataReader对象</param>
  public void RunProc(string procName, SqlParameter[] prams, SqlDataReader Dr)
  {

  SqlCommand Cmd = CreateCmd(procName, prams, Dr);
  Dr = Cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
  return;
  }

  /// <summary>
  /// 运行存储过程,返回.
  /// </summary>
  /// <param name="procName">存储过程名</param>
  /// <param name="prams">存储过程参数</param>
  public string RunProc(string procName, SqlParameter[] prams)
  {
  SqlDataReader Dr;
  SqlCommand Cmd = CreateCmd(procName, prams);
  Dr = Cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
  if(Dr.Read())
  {
   return Dr.GetValue(0).ToString();
  }
  else
  {
   return "";
  }
  }

  /// <summary>
  /// 运行存储过程,返回dataset.
  /// </summary>
  /// <param name="procName">存储过程名.</param>
  /// <param name="prams">存储过程入参数组.</param>
  /// <returns>dataset对象.</returns>
  public DataSet RunProc(string procName,SqlParameter[] prams,DataSet Ds)
  {
  SqlCommand Cmd = CreateCmd(procName,prams);
  SqlDataAdapter Da = new SqlDataAdapter(Cmd);
  try
  {
   Da.Fill(Ds);
  }
  catch(Exception Ex)
  {
   throw Ex;
  }
  return Ds;
  }

 }
}

Tags:ASP NET 封装

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