SQL存储过程 数据访问类

 

//////////////数据访问类
using System;
using System.ComponentModel;
using System.Collections;
using System.Web.Security;
using System.Diagnostics;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Text.RegularExpressions;

namespace WebApp.Components
{
 /// <summary>
 /// 通用的数据库处理类，通过ado.net与数据库连接
 /// </summary>
 public class Database : IDisposable 
 {
  // 连接数据源
  private SqlConnection con;
  
  #region 执行不带参数的存储过程，返回存储过程返回值
  /// <summary>
  /// 执行存储过程
  /// </summary>
  /// <param name="procName">不带参数的存储过程的名称</param>
  /// <returns>返回存储过程返回值</returns>
  public int RunProc(string procName) 
  {
   SqlCommand cmd = CreateCommand(procName, null);
   cmd.ExecuteNonQuery();
   this.Close();
   return (int)cmd.Parameters["ReturnValue"].Value;
  }
  #endregion 

  #region 执行带参数的存储过程，返回存储过程返回值
  /// <summary>
  /// 执行存储过程
  /// </summary>
  /// <param name="procName">带参数存储过程名称</param>
  /// <param name="prams">存储过程所需参数</param>
  /// <returns>返回存储过程返回值</returns>
  public int RunProc(string procName, SqlParameter[] prams) 
  {
   SqlCommand cmd = CreateCommand(procName,prams);
   cmd.ExecuteNonQuery();
   this.Close();
   return (int)cmd.Parameters["ReturnValue"].Value;
  }
  #endregion

  #region 执行不带参数的存储过程，通过输出参数返回SqlDataReader对象
  /// <summary>
  /// 执行存储过程
  /// </summary>
  /// <param name="procName">不带参数的存储过程的名称</param>
  /// <param name="dataReader">通过输出参数返回SqlDataReader对象</param>
  public void RunProc(string procName, out SqlDataReader dataReader) 
  {
   SqlCommand cmd = CreateCommand(procName, null);
   dataReader = cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
  }
  #endregion 

  #region 执行带参数的存储过程，通过输出参数返回SqlDataReader对象
  /// <summary>
  /// 执行存储过程
  /// </summary>
  /// <param name="procName">带参数的存储过程的名称</param>
  /// <param name="prams">存储过程所需参数</param>
  /// <param name="dataReader">通过输出参数返回SqlDataReader对象</param>
  public void RunProc(string procName, SqlParameter[] prams, out SqlDataReader dataReader) 
  {
   SqlCommand cmd = CreateCommand(procName, prams);
   dataReader = cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
  }
  #endregion   

  #region 创建SqlCommand对象
  /// <summary>
  /// 创建一个SqlCommand对象以此来执行存储过程
  /// </summary>
  /// <param name="procName">存储过程的名称</param>
  /// <param name="prams">存储过程所需参数</param>
  /// <returns>返回SqlCommand对象</returns>
  private SqlCommand CreateCommand(string procName, SqlParameter[] prams) 
  {
   // 确认打开连接
   Open();
   SqlCommand cmd = new SqlCommand(procName, con);
   cmd.CommandType = CommandType.StoredProcedure;

   // 依次把参数传入存储过程
   if (prams != null) 
   {
    foreach (SqlParameter parameter in prams)
     cmd.Parameters.Add(parameter);
   }
   
   // 加入返回参数
   cmd.Parameters.Add(
    new SqlParameter("ReturnValue", SqlDbType.Int, 4,
    ParameterDirection.ReturnValue, false, 0, 0,
    string.Empty, DataRowVersion.Default, null));

   return cmd;
  }
  #endregion

  #region 打开数据库连接
  /// <summary>
  /// 打开数据库连接.
  /// </summary>
  private void Open() 
  {
   // 打开数据库连接
   if (con == null) 
   {
    con = new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"]);    
   }    
   if(con.State == System.Data.ConnectionState.Closed)
    con.Open();

  }
  #endregion

  #region 关闭数据库连接
  /// <summary>
  /// 关闭数据库连接
  /// </summary>
  public void Close() 
  {
   if (con != null)
    con.Close();
  }
  #endregion

  #region 释放资源
  /// <summary>
  /// 释放资源
  /// </summary>
  public void Dispose() 
  {
   // 确认连接是否已经关闭
   if (con != null) 
   {
    con.Dispose();
    con = null;
   }    
  }
  #endregion

  #region 传入输入参数
  /// <summary>
  /// 传入输入参数
  /// </summary>
  /// <param name="ParamName">存储过程名称</param>
  /// <param name="DbType">参数类型</param>
  /// <param name="Size">参数大小</param>
  /// <param name="Value">参数值</param>
  /// <returns>新的 parameter 对象</returns>
  public SqlParameter MakeInParam(string ParamName, SqlDbType DbType, int Size, object Value) 
  {
   return MakeParam(ParamName, DbType, Size, ParameterDirection.Input, Value);
  }  
  #endregion

  #region 传入输出参数
  /// <summary>
  /// 传入输出参数
  /// </summary>
  /// <param name="ParamName">存储过程名称</param>
  /// <param name="DbType">参数类型</param>
  /// <param name="Size">参数大小</param>
  /// <returns>新的 parameter 对象</returns>
  public SqlParameter MakeOutParam(string ParamName, SqlDbType DbType, int Size) 
  {
   return MakeParam(ParamName, DbType, Size, ParameterDirection.Output, null);
  }  
  #endregion

  #region 传入返回值参数
  /// <summary>
  /// 传入返回值参数
  /// </summary>
  /// <param name="ParamName">存储过程名称</param>
  /// <param name="DbType">参数类型</param>
  /// <param name="Size">参数大小</param>
  /// <returns>新的 parameter 对象</returns>
  public SqlParameter MakeReturnParam(string ParamName, SqlDbType DbType, int Size) 
  {
   return MakeParam(ParamName, DbType, Size, ParameterDirection.ReturnValue, null);
  } 
  #endregion

  #region 生成存储过程参数
  /// <summary>
  /// 生成存储过程参数
  /// </summary>
  /// <param name="ParamName">存储过程名称</param>
  /// <param name="DbType">参数类型</param>
  /// <param name="Size">参数大小</param>
  /// <param name="Direction">参数方向</param>
  /// <param name="Value">参数值</param>
  /// <returns>新的 parameter 对象</returns>
  public SqlParameter MakeParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value) 
  {
   SqlParameter param;

   if(Size > 0)
    param = new SqlParameter(ParamName, DbType, Size);
   else
    param = new SqlParameter(ParamName, DbType);

   param.Direction = Direction;
   if (!(Direction == ParameterDirection.Output && Value == null))
    param.Value = Value;

   return param;
  }
  #endregion
  
  #region 将DataReader 转为 DataTable
  /// <summary>
  /// 将DataReader 转为 DataTable
  /// </summary>
  /// <param name="DataReader">DataReader</param>
  public static DataTable ConvertDataReaderToDataTable(SqlDataReader reader)
  {
   try
   {

                DataTable objDataTable = new DataTable();
                int intFieldCount = reader.FieldCount;
                for (int intCounter = 0; intCounter < intFieldCount; ++intCounter)
                {
                    objDataTable.Columns.Add(reader.GetName(intCounter), reader.GetFieldType(intCounter));
                }

                objDataTable.BeginLoadData();

                object[] objValues = new object[intFieldCount];
                while (reader.Read())
                {
                    reader.GetValues(objValues);
                    objDataTable.LoadDataRow(objValues, true);
                }
                reader.Close();
                objDataTable.EndLoadData();

                return objDataTable;

            }
   catch(Exception ex)
   {
    throw new Exception("转换DataReader为DataTable出错!",ex);
   }
   
  }
  #endregion

        #region 数字判定
        /// <summary>
        /// 数字判定
        /// </summary>
        /// <param name="str">字符串参数</param>
        public static bool IsNumber(String strNumber)
        {
            Regex objNotNumberPattern = new Regex("[^0-9.-]");
            Regex objTwoDotPattern = new Regex("[0-9]*[.][0-9]*[.][0-9]*");
            Regex objTwoMinusPattern = new Regex("[0-9]*[-][0-9]*[-][0-9]*");
            String strValidRealPattern = "^([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]+$";
            String strValidIntegerPattern = "^([-]|[0-9])[0-9]*$";
            Regex objNumberPattern = new Regex("(" + strValidRealPattern + ")|(" + strValidIntegerPattern + ")");

            return !objNotNumberPattern.IsMatch(strNumber) &&
            !objTwoDotPattern.IsMatch(strNumber) &&
            !objTwoMinusPattern.IsMatch(strNumber) &&
            objNumberPattern.IsMatch(strNumber);
        }
        #endregion

 }
}

///////////使用
            SqlDataReader dataReader = null;
            Database data = new Database();
            SqlParameter[] prams = {
            data.MakeInParam("@LinkID",SqlDbType.Int, 4, LinkID),
      };
            try
            {
                data.RunProc("存储过程", prams, out dataReader);
                return dataReader;
            }
            catch (Exception ex)
            {
                throw new Exception("友情链接读取出错!", ex);
            }

//这些是关于数据访问的部分代码，关于存储过程，分三种：无返回查询，返回数据集，返回单值