C#SQL数据库操作类

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srxljl
/// </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srxljl
    /// </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DataReadersrxljl
    /// </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srxljl
    /// </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srxljl
    /// </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srxljl
    /// </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srxljl
    /// </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srxljl
    /// </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srxljl
    /// </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srxljl
    /// </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,srxljl
    /// </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srxljl
    /// </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.srxljl
    /// </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.srxljl
    /// </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.srxljl
    /// </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;
    }

}
}