源码展示:ASP.NET 数据访问类-优快云博客

using System;
using System.Data;
using System.Data.SqlClient;

namespace SysClassLibrary
{
/// <summary>
/// DataAccess 的摘要说明。
/// <description>数据处理基类,调用方式：DataAccess.DataSet((string)sqlstr);或者DataAccess.DataSet((string)sqlstr,ref DataSet ds); </description>
/// </summary>
public class DataAccess
{
#region 属性
protected static SqlConnection conn=new SqlConnection();
protected static SqlCommand comm=new SqlCommand();
#endregion
public DataAccess()
{
//init();
}
#region 内部函数静态方法中不会执行DataAccess()构造函数

/// <summary>
/// 打开数据库连接
/// </summary>
private static void openConnection()
{
   if (conn.State == ConnectionState.Closed)
   {
    //SysConfig.ConnectionString 为系统配置类中连接字符串，如："server=localhost;database=databasename;uid=sa;pwd=;"

    conn.ConnectionString = SysConfig.ConnectionString ;
    comm.Connection =conn;
    try
    {
     conn.Open();
    }
    catch(Exception e)
    {
     throw new Exception(e.Message);
    }
   }
}
/// <summary>
/// 关闭当前数据库连接
/// </summary>
private static void closeConnection()
{
   if(conn.State == ConnectionState.Open)
    conn.Close();
   conn.Dispose();
   comm.Dispose();
}
#endregion
/// <summary>
/// 执行Sql查询语句
/// </summary>
/// <param name="sqlstr">传入的Sql语句</param>
public static void ExecuteSql(string sqlstr)
{try
   {
    openConnection();
    comm.CommandType =CommandType.Text ;
    comm.CommandText =sqlstr;
    comm.ExecuteNonQuery();
   }
   catch(Exception e)
   {
    throw new Exception(e.Message);
   }
   finally
   {
    closeConnection();
   }
}

/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="procName">存储过程名</param>
/// <param name="coll">SqlParameters 集合</param>
public static void ExecutePorcedure(string procName,SqlParameter[] coll)
{
   try
   {
    openConnection();
    for(int i=0;i<coll.Length;i++)
    {
     comm.Parameters .Add(coll[i]);
    }
    comm.CommandType=CommandType.StoredProcedure ;
    comm.CommandText =procName;
    comm.ExecuteNonQuery();
   }
   catch(Exception e)
   {
    throw new Exception(e.Message);
   }
   finally
   {
    comm.Parameters.Clear();
    closeConnection();
   }
}

/// <summary>
/// 执行存储过程并返回数据集
/// </summary>
/// <param name="procName">存储过程名称</param>
/// <param name="coll">SqlParameter集合</param>
/// <param name="ds">DataSet </param>
public static void ExecutePorcedure(string procName,SqlParameter[] coll,ref DataSet ds)
{
   try
   {
    SqlDataAdapter da=new SqlDataAdapter();
    openConnection();
    for(int i=0;i<coll.Length;i++)
    {
     comm.Parameters .Add(coll[i]);}
    comm.CommandType=CommandType.StoredProcedure ;
    comm.CommandText =procName;

    da.SelectCommand =comm;
    da.Fill(ds);
   }
   catch(Exception e)
   {
    throw new Exception(e.Message);
   }
   finally
   {
    comm.Parameters.Clear();
    closeConnection();
   }
}

/// <summary>
/// 执行Sql查询语句并返回第一行的第一条记录,返回值为object 使用时需要拆箱操作 -> Unbox
/// </summary>
/// <param name="sqlstr">传入的Sql语句</param>
/// <returns>object 返回值 </returns>
public static object ExecuteScalar(string sqlstr)
{
   object obj=new object();
   try
   {
    openConnection();
    comm.CommandType =CommandType.Text ;
    comm.CommandText =sqlstr;
    obj=comm.ExecuteScalar();
   }
   catch(Exception e)
   {
    throw new Exception(e.Message);
   }
   finally
   {
    closeConnection();
   }
   return obj;
}

/// <summary>
/// 执行Sql查询语句,同时进行事务处理
/// </summary>
/// <param name="sqlstr">传入的Sql语句</param>
public static void ExecuteSqlWithTransaction(string sqlstr)
{
   SqlTransaction trans ;
   trans=conn.BeginTransaction();
   comm.Transaction =trans;
   try
   {
    openConnection();
    comm.CommandType =CommandType.Text ;
    comm.CommandText =sqlstr;
    comm.ExecuteNonQuery(); trans.Commit();
   }
   catch
   {
    trans.Rollback();
   }
   finally
   {
    closeConnection();
   }
}

/// <summary>
/// 返回指定Sql语句的SqlDataReader，请注意，在使用后请关闭本对象，同时将自动调用closeConnection()来关闭数据库连接
/// 方法关闭数据库连接
/// </summary>
/// <param name="sqlstr">传入的Sql语句</param>
/// <returns>SqlDataReader对象</returns>
public static SqlDataReader dataReader(string sqlstr)
{
   SqlDataReader dr=null;
   try
   {
    openConnection();
    comm.CommandText =sqlstr;
    comm.CommandType =CommandType.Text ;
    dr=comm.ExecuteReader(CommandBehavior.CloseConnection);
   }
   catch
   {
    try
    {
     dr.Close();
     closeConnection();
    }
    catch
    {
    }
   }
   return dr;
}
/// <summary>
/// 返回指定Sql语句的SqlDataReader，请注意，在使用后请关闭本对象，同时将自动调用closeConnection()来关闭数据库连接
/// 方法关闭数据库连接
/// </summary>
/// <param name="sqlstr">传入的Sql语句</param>
/// <param name="dr">传入的ref DataReader 对象</param>
public static void dataReader(string sqlstr,ref SqlDataReader dr)
{
   try
   {
    openConnection();
    comm.CommandText =sqlstr;
    comm.CommandType =CommandType.Text ;
    dr=comm.ExecuteReader(CommandBehavior.CloseConnection);
   }
   catch
   {
    try
    {
     if(dr!=null && !dr.IsClosed) dr.Close();
    }
    catch
    {
    }
    finally
    {
     closeConnection();
    }
   }
}

/// <summary>
/// 返回指定Sql语句的DataSet
/// </summary>
/// <param name="sqlstr">传入的Sql语句</param>
/// <returns>DataSet</returns>
public static DataSet dataSet(string sqlstr)
{
   DataSet ds= new DataSet();
   SqlDataAdapter da=new SqlDataAdapter();
   try
   {
    openConnection();
    comm.CommandType =CommandType.Text ;
    comm.CommandText =sqlstr;
    da.SelectCommand =comm;
    da.Fill(ds);
   }
   catch(Exception e)
   {
    throw new Exception(e.Message);
   }
   finally
   {
    closeConnection();
   }
   return ds;
}

/// <summary>
/// 返回指定Sql语句的DataSet
/// </summary>
/// <param name="sqlstr">传入的Sql语句</param>
/// <param name="ds">传入的引用DataSet对象</param>
public static void dataSet(string sqlstr,ref DataSet ds)
{
   SqlDataAdapter da=new SqlDataAdapter();
   try
   {
    openConnection();
    comm.CommandType =CommandType.Text ;
    comm.CommandText =sqlstr;
    da.SelectCommand =comm;
    da.Fill(ds);
   }
   catch(Exception e)
   {
    throw new Exception(e.Message);
   }finally
   {
    closeConnection();
   }
}
/// <summary>
/// 返回指定Sql语句的DataTable
/// </summary>
/// <param name="sqlstr">传入的Sql语句</param>
/// <returns>DataTable</returns>
public static DataTable dataTable(string sqlstr)
{
   SqlDataAdapter da=new SqlDataAdapter();
   DataTable datatable=new DataTable();
   try
   {
    openConnection();
    comm.CommandType =CommandType.Text ;
    comm.CommandText =sqlstr;
    da.SelectCommand =comm;
    da.Fill(datatable);
   }
   catch(Exception e)
   {
    throw new Exception(e.Message);
   }
   finally
   {
    closeConnection();
   }
   return datatable;
}

/// <summary>
/// 执行指定Sql语句,同时给传入DataTable进行赋值
/// </summary>
/// <param name="sqlstr">传入的Sql语句</param>
/// <param name="dt">ref DataTable dt </param>
public static void dataTable(string sqlstr,ref DataTable dt)
{
   SqlDataAdapter da=new SqlDataAdapter();
   try
   {
    openConnection();
    comm.CommandType =CommandType.Text ;
    comm.CommandText =sqlstr;
    da.SelectCommand =comm;
    da.Fill(dt);
   }
   catch(Exception e)
   {
    throw new Exception(e.Message);
   }
   finally
   {
    closeConnection();
   }
}
/// <summary>/// 执行带参数存储过程并返回数据集合
/// </summary>
/// <param name="procName">存储过程名称</param>
/// <param name="parameters">SqlParameterCollection 输入参数</param>
/// <returns></returns>
public static DataTable dataTable(string procName,SqlParameterCollection parameters)
{
   SqlDataAdapter da=new SqlDataAdapter();
   DataTable datatable=new DataTable();
   try
   {
    openConnection();
    comm.Parameters.Clear();
    comm.CommandType=CommandType.StoredProcedure ;
    comm.CommandText =procName;
    foreach(SqlParameter para in parameters)
    {
     SqlParameter p=(SqlParameter)para;
     comm.Parameters.Add(p);
    }
    da.SelectCommand =comm;
    da.Fill(datatable);
   }
   catch(Exception e)
   {
    throw new Exception(e.Message);
   }
   finally
   {
    closeConnection();
   }
   return datatable;
}

public static DataView dataView(string sqlstr)
{
   SqlDataAdapter da=new SqlDataAdapter();
   DataView dv=new DataView();
   DataSet ds=new DataSet();
   try
   {
    openConnection();
    comm.CommandType=CommandType.Text;
    comm.CommandText =sqlstr;
    da.SelectCommand =comm;
    da.Fill(ds);
    dv=ds.Tables[0].DefaultView;
   }
   catch(Exception e)
   {
    throw new Exception(e.Message);
   }
   finally
   {
    closeConnection();
   }
   return dv;
}
}