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

namespace BLL
{
	/// <summary>
	/// 所有数据访问层类的基类，封装了一些数据库访问的保护方法
    /// </summary>
    /// 
	public  class SQLHelper
	{

        private static string connectionString = Funs.ConnString;
        //private  static  SqlConnection Connection=new SqlConnection( connectionString );

        //public static SqlConnection GetConn()
        //{
        //    return Connection;
        //}
		/// <summary>
		///被RunProcedure调用 构建 SqlCommand 对象.
		/// </summary>
		/// <param name="storedProcName">Name of the stored procedure in the DB, eg. sp_DoTask</param>
		/// <param name="parameters">Array of IDataParameter objects containing parameters to the stored proc</param>
		/// <returns>Newly instantiated SqlCommand instance</returns>
		private   static SqlCommand BuildIntCommand(string storedProcName, IDataParameter[] parameters)
		{
			SqlCommand command = BuildQueryCommand( storedProcName, parameters );			
			command.Parameters.Add( new SqlParameter ( "ReturnValue",
				SqlDbType.Int,
				4, /* Size */
				ParameterDirection.ReturnValue,
				false, /* is nullable */
				0, /* byte precision */
				0, /* byte scale */
				string.Empty,
				DataRowVersion.Default,
				null ));

			return command;
		}


		/// <summary>
		/// 在BuildIntCommand中被调用的私有函数，用于构建 SqlCommand 对象.
		/// </summary>
		/// <param name="storedProcName">Name of the stored procedure</param>
		/// <param name="parameters">Array of IDataParameter objects</param>
		/// <returns></returns>
        private static SqlCommand BuildQueryCommand(string storedProcName, IDataParameter[] parameters)
        {
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(storedProcName, Connection);
                    command.CommandType = CommandType.StoredProcedure;//执行存储过程

                    foreach (SqlParameter parameter in parameters)
                    {
                        command.Parameters.Add(parameter);
                    }

                    return command;
                }
               
                finally
                {
                    Connection.Close();
                }
            }
        }


        public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
        {
            int result;
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = BuildIntCommand(storedProcName, parameters);
                    rowsAffected = command.ExecuteNonQuery();//执行完存储过程后返回的结果
                    result = (int)command.Parameters["ReturnValue"].Value;
                }
                catch
                {
                    rowsAffected = -1;
                    result = -1;
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                } 
            }
            return result;
        }

        /// <summary>
        /// 通过存储过程获得新ID（存储过程有返回值有个output参数）
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <returns></returns>
        public static string RunProcNewId(string storedProcName)
        {
            string str = "";
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(storedProcName, Connection);
                    command.CommandType = CommandType.StoredProcedure;
                    command.Parameters.Add(new SqlParameter("@returnVal", SqlDbType.VarChar, 50));
                    command.Parameters["@returnVal"].Direction = ParameterDirection.Output;
                    command.ExecuteNonQuery();
                    str = command.Parameters["@returnVal"].Value.ToString();
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            } 
            return str;
        }

        /// <summary>
        /// 通过存储过程名和表名以及列名获得新ID（存储过程有返回值有个output参数）
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="tableName">表名</param>
        /// <param name="columnName">列名</param>
        /// <returns></returns>
        public static string RunProcNewId(string storedProcName, string tableName, string columnName)
        {
            string str = "";
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(storedProcName, Connection);
                    command.CommandType = CommandType.StoredProcedure;
                    SqlParameter[] values = new SqlParameter[]
                                           {
                                              new SqlParameter("@tableName", tableName),
                                              new SqlParameter("@columnName", columnName),
                                              new SqlParameter("@returnVal", SqlDbType.VarChar, 10)
                                            };
                    command.Parameters.AddRange(values);
                    command.Parameters["@returnVal"].Direction = ParameterDirection.Output;
                    command.ExecuteNonQuery();
                    str = command.Parameters["@returnVal"].Value.ToString();
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
            return str;
        }

        
        /// <summary>
        ///  通过存储过程名和表名以及列名获得新ID（存储过程有返回值有个output参数）
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="tableName">表名</param>
        /// <param name="columnName">列名</param>
        /// <param name="perfix">前缀</param>
        /// <returns>递增的新ID</returns>
        public static string RunProcNewId(string storedProcName, string tableName, string columnName, string toCode, string prefix)
        {
            string str = "";
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(storedProcName, Connection);
                    command.CommandType = CommandType.StoredProcedure;
                    SqlParameter[] values = new SqlParameter[]
                                           {
                                              new SqlParameter("@tableName", tableName),
                                              new SqlParameter("@columnName", columnName),
                                              new SqlParameter("@toCode", toCode),
                                              new SqlParameter("@prefix", prefix),
                                              new SqlParameter("@returnVal", SqlDbType.VarChar, 30)
                                            };
                    command.Parameters.AddRange(values);
                    command.Parameters["@returnVal"].Direction = ParameterDirection.Output;
                    command.ExecuteNonQuery();
                    str = command.Parameters["@returnVal"].Value.ToString();
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
            return str;
        }

        /// <summary>
        ///  通过存储过程名和表名以及列名获得新ID（存储过程有返回值有个output参数）
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="tableName">表名</param>
        /// <param name="columnName">列名</param>
        /// <param name="projectId">项目号</param>
        /// <returns>递增的流水号</returns>
        public static string RunProcFlowCode(string storedProcName, string tableName, string columnName, string projectId)
        {
            string str = "";
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(storedProcName, Connection);
                    command.CommandType = CommandType.StoredProcedure;
                    SqlParameter[] values = new SqlParameter[]
                                            {
                                               new SqlParameter("@tableName", tableName),
                                               new SqlParameter("@columnName", columnName),
                                               new SqlParameter("@projectId", projectId),
                                               new SqlParameter("@returnVal", SqlDbType.VarChar, 30)
                                             };
                    command.Parameters.AddRange(values);
                    command.Parameters["@returnVal"].Direction = ParameterDirection.Output;
                    command.ExecuteNonQuery();
                    str = command.Parameters["@returnVal"].Value.ToString();
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                } 
            }
            return str;
        }

        public static string RunProcNewId(string storedProcName, string tableName, string columnName, string prefix)
        {
            string str = "";
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(storedProcName, Connection);
                    command.CommandType = CommandType.StoredProcedure;
                    SqlParameter[] values = new SqlParameter[]
                                            {
                                               new SqlParameter("@tableName", tableName),
                                               new SqlParameter("@columnName", columnName),
                                               new SqlParameter("@prefix", prefix),
                                               new SqlParameter("@returnVal", SqlDbType.VarChar, 30)
                                             };
                    command.Parameters.AddRange(values);
                    command.Parameters["@returnVal"].Direction = ParameterDirection.Output;
                    command.ExecuteNonQuery();
                    str = command.Parameters["@returnVal"].Value.ToString();
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
            return str;
        }

        /// <summary>
        ///  通过存储过程名和表名以及列名获得新ID（存储过程有返回值有个output参数）
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="tableName">表名</param>
        /// <param name="columnName">列名</param>
        /// <param name="perfix">前缀</param>
        /// <param name="toCode">对应编号</param>
        /// <returns>递增的新ID</returns>
        public static string RunProcNewId(string storedProcName, string tableName, string columnName, string projectId, string prefix, string toCode)
        {
            string str = "";
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(storedProcName, Connection);
                    command.CommandType = CommandType.StoredProcedure;
                    SqlParameter[] values = new SqlParameter[]
                                            {
                                               new SqlParameter("@tableName", tableName),
                                               new SqlParameter("@columnName", columnName),
                                               new SqlParameter("@projectId", projectId),
                                               new SqlParameter("@prefix", prefix),
                                               new SqlParameter("@toCode", toCode),
                                               new SqlParameter("@returnVal", SqlDbType.VarChar, 30)
                                             };
                    command.Parameters.AddRange(values);
                    command.Parameters["@returnVal"].Direction = ParameterDirection.Output;
                    command.ExecuteNonQuery();
                    str = command.Parameters["@returnVal"].Value.ToString();
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
            return str;
        }

        /// <summary>
        ///  通过存储过程名和表名以及列名获得新ID（存储过程有返回值有个output参数）
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="tableName">表名</param>
        /// <param name="columnName">列名</param>
        /// <param name="perfix">前缀</param>
        /// <returns>递增的新ID</returns>
        public static string RunProcNewIdByProjectId(string storedProcName, string tableName, string columnName, string projectId, string prefix)
        {
            string str = "";
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(storedProcName, Connection);
                    command.CommandType = CommandType.StoredProcedure;
                    SqlParameter[] values = new SqlParameter[]
                                           {
                                               new SqlParameter("@tableName", tableName),
                                               new SqlParameter("@columnName", columnName),
                                               new SqlParameter("@projectId", projectId),
                                               new SqlParameter("@prefix", prefix),
                                               new SqlParameter("@returnVal", SqlDbType.VarChar, 50)
                                            };
                    command.Parameters.AddRange(values);
                    command.Parameters["@returnVal"].Direction = ParameterDirection.Output;
                    command.ExecuteNonQuery();
                    str = command.Parameters["@returnVal"].Value.ToString();
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }  
            }
            return str;
        }

        /// <summary>
        /// 通过存储过程获得DataTable
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <returns></returns>
        public static DataTable GetDataTableRunProc(string storedProcName, params SqlParameter[] parameters)
        {
            DataTable dataTable = new DataTable();
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(storedProcName, Connection);
                    command.CommandType = CommandType.StoredProcedure;
                    command.CommandTimeout = 600;
                    if (parameters != null)
                    {
                        command.Parameters.AddRange(parameters);
                    }

                    SqlDataAdapter adapter = new SqlDataAdapter(command);
                    adapter.Fill(dataTable);
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
            return dataTable;
        }

		/// <summary>
		/// Will run a stored procedure, can only be called by those classes deriving
		/// from this base. It returns a SqlDataReader containing the result of the stored
		/// procedure.
		/// </summary>
		/// <param name="storedProcName">Name of the stored procedure</param>
		/// <param name="parameters">Array of parameters to be passed to the procedure</param>
		/// <returns>A newly instantiated SqlDataReader object</returns>
        public static SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters)
        {
            SqlDataReader returnReader;
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = BuildQueryCommand(storedProcName, parameters);
                    command.CommandType = CommandType.StoredProcedure;

                    returnReader = command.ExecuteReader();
                }
              
                finally
                {
                    Connection.Close();
                }  
            }
            return returnReader;
        }


        /// <summary>
        /// 通过存储过程获得DataTable
        /// </summary>
        /// <param name="strSql">sql字符串</param>
        /// <returns></returns>
        public static DataTable GetDataTableRunText(string strSql, params SqlParameter[] parameters)
        {
            DataTable dataTable = new DataTable();
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(strSql, Connection);
                    command.CommandType = CommandType.Text;
                    command.CommandTimeout = 600;
                    if (parameters != null)
                    {
                        command.Parameters.AddRange(parameters);
                    }

                    SqlDataAdapter adapter = new SqlDataAdapter(command);
                    adapter.Fill(dataTable);
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
            return dataTable;
        }

        /// <summary>
        /// 获取字符串
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <returns>字符串</returns>
        public static string getStr(string sql, IDataParameter[] parameters)
        {
            string str = "";
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(sql, Connection);
                    command.CommandType = CommandType.Text;
                    if (parameters != null)
                    {
                        command.Parameters.AddRange(parameters);
                    }

                    str = command.ExecuteScalar().ToString();
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
            return str;
        }

        /// <summary>
        /// 执行SQL语句
        /// </summary>
        /// <param name="sql">sql语句</param>
        public static void ExecutSql(string sql)
        {
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(sql, Connection);
                    command.CommandType = CommandType.Text;
                    command.ExecuteNonQuery();
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
        }

        /// <summary>
        /// 执行带参数的SQL语句
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="parameters"></param>
        public static void ExecutSql(string sql, IDataParameter[] parameters)
        {
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(sql, Connection);
                    command.CommandType = CommandType.Text;
                    if (parameters != null)
                    {
                        command.Parameters.AddRange(parameters);
                    }
                    command.ExecuteNonQuery();
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
        }

		////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
		/// <summary>
		/// Creates a DataSet by running the stored procedure and placing the results
		/// of the query/proc into the given tablename.
		/// </summary>
		/// <param name="storedProcName"></param>
		/// <param name="parameters"></param>
		/// <param name="tableName"></param>
		/// <returns></returns>
        public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName)
        {
            DataSet dataSet = new DataSet();
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlDataAdapter sqlDA = new SqlDataAdapter();
                    sqlDA.SelectCommand = BuildQueryCommand(storedProcName, parameters);
                    sqlDA.Fill(dataSet, tableName);
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
            return dataSet;
        }

		/// <summary>
		/// Takes an -existing- dataset and fills the given table name with the results
		/// of the stored procedure.
		/// </summary>
		/// <param name="storedProcName"></param>
		/// <param name="parameters"></param>
		/// <param name="dataSet"></param>
		/// <param name="tableName"></param>
		/// <returns></returns>
        public static void RunProcedure(string storedProcName, IDataParameter[] parameters, DataSet dataSet, string tableName)
        {
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlDataAdapter sqlDA = new SqlDataAdapter();
                    sqlDA.SelectCommand = BuildIntCommand(storedProcName, parameters);
                    sqlDA.Fill(dataSet, tableName);
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
        }

		/// <summary>
		/// 用于简单的Sql查询，返回DataSet
		/// </summary>
		/// <param name="strSql"></param>
		/// <param name="tableName"></param>
		/// <returns></returns>
        public static DataSet RunSqlString(string strSql, string tableName)
        {
            DataSet dataSet = new DataSet();
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();

                    SqlCommand command = new SqlCommand(strSql, Connection);
                    SqlDataAdapter sqlDA = new SqlDataAdapter();
                    sqlDA.SelectCommand = command;
                    sqlDA.Fill(dataSet, tableName);
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
                
            }
            return dataSet;
        }

		/// <summary>
		/// 用于简单的Sql查询
		/// </summary>
		/// <param name="strSql"></param>
		/// <param name="dataSet"></param>
		/// <param name="tableName"></param>
        public static void RunProcedure(string strSql, DataSet dataSet, string tableName)
        {
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(strSql, Connection);
                    SqlDataAdapter sqlDA = new SqlDataAdapter();
                    sqlDA.SelectCommand = command;
                    sqlDA.Fill(dataSet, tableName);
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
        }

		/// <summary>
		/// 用于简单的Sql执行，不返回值，用于数据操作类型的
		/// </summary>
		/// <param name="strSql"></param>
		/// <param name="result"></param>
		public static void RunSqlString(string strSql,out int result)
		{
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(strSql, Connection);
                    command.CommandType = CommandType.Text;

                    result = command.ExecuteNonQuery();
                }
                catch
                {
                    result = -1;
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }
            }
		}


	/*	public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName )
		{
			DataSet dataSet = new DataSet();
			if (Connection.State == ConnectionState.Open) Connection.Close();
			Connection.Open();
			SqlDataAdapter sqlDA = new SqlDataAdapter();
			sqlDA.SelectCommand = BuildQueryCommand( storedProcName, parameters );
			sqlDA.Fill( dataSet, tableName );
			Connection.Close();

			return dataSet;
		}*/

		/// 返回存储过程执行的结果集
		/// </summary>
		/// <param name="pur_name">存储过程名称</param>
		/// <param name="parmList">存储过程的{参数--值}的集合</param>
		//  返回存储过程执行的结果集。
        public static DataTable RunProcedureGetTable(string pur_name, Hashtable parmList)
        {
            DataTable dt = new DataTable();
            DataRow dr;
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                // 调用存储过程pur_name。
                SqlCommand sqlCmd = new SqlCommand(pur_name, Connection);
                sqlCmd.CommandType = CommandType.StoredProcedure;
                // 为输入参数赋值。
                foreach (string parm in parmList.Keys)
                {
                    sqlCmd.Parameters.Add(new SqlParameter("@" + parm, parmList[parm]));
                }
                // 打开连接。
                sqlCmd.Connection.Open();
                SqlDataReader dreader = null;
                try
                {
                    dreader = sqlCmd.ExecuteReader();
                    for (int i = 0; i < dreader.FieldCount; i++)
                    {
                        DataColumn myDataColumn;
                        myDataColumn = new DataColumn();
                        myDataColumn.DataType = System.Type.GetType(dreader.GetFieldType(i).ToString());
                        myDataColumn.ColumnName = dreader.GetName(i);
                        myDataColumn.Caption = dreader.GetName(i);
                        dt.Columns.Add(myDataColumn);
                    }
                    while (dreader.Read())
                    {
                        dr = dt.NewRow();
                        for (int i = 0; i < dreader.FieldCount; i++)
                        {
                            dr[i] = dreader[i];
                        }
                        dt.Rows.Add(dr);
                    }
                    dreader.Close();
                }
                catch (Exception ex)
                {
                    sqlCmd.Connection.Close();
                    string str = ex.Message.ToString();
                    // 不成功则给出提示。
                    throw new Exception(ex.ToString());
                }
                finally
                {
                    // 关闭连接。
                    sqlCmd.Connection.Close();
                } 
            }
            return dt;
        }

		/// </summary>
		/// <param name="strSql">sql串</param>
		/// <param name="parmList">sql{参数--值}的集合</param>
        public static DataTable RunSqlGetTable(string strSql)
        {
            DataTable dt = new DataTable();
            DataRow dr;
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                // 调用存储过程pur_name。
                SqlCommand sqlCmd = new SqlCommand(strSql, Connection);

                // 打开连接。
                sqlCmd.Connection.Open();
                SqlDataReader dreader = null;
                try
                {
                    dreader = sqlCmd.ExecuteReader();
                    for (int i = 0; i < dreader.FieldCount; i++)
                    {
                        DataColumn myDataColumn;
                        myDataColumn = new DataColumn();
                        myDataColumn.DataType = System.Type.GetType(dreader.GetFieldType(i).ToString());
                        myDataColumn.ColumnName = dreader.GetName(i);
                        myDataColumn.Caption = dreader.GetName(i);
                        dt.Columns.Add(myDataColumn);
                    }
                    while (dreader.Read())
                    {
                        dr = dt.NewRow();
                        for (int i = 0; i < dreader.FieldCount; i++)
                        {
                            dr[i] = dreader[i];
                        }
                        dt.Rows.Add(dr);
                    }
                    dreader.Close();
                }
                catch (Exception ex)
                {
                    sqlCmd.Connection.Close();
                    // 不成功则给出提示。
                    throw new Exception(ex.ToString());
                }
                finally
                {
                    // 关闭连接。
                    sqlCmd.Connection.Close();
                }

                return dt;
            }
        }

		/// 返回存储过程执行的结果集
		/// </summary>
		/// <param name="pur_name">存储过程名称</param>
		/// <param name="parmList">存储过程的{参数--值}的集合</param>
		public static  void RunProcedure(string pur_name,Hashtable parmList)
		{
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                // 调用存储过程pur_name。
                SqlCommand sqlCmd = new SqlCommand(pur_name, Connection);
                sqlCmd.CommandType = CommandType.StoredProcedure;
                // 为输入参数赋值。
                foreach (string parm in parmList.Keys)
                {
                    sqlCmd.Parameters.Add(new SqlParameter("@" + parm, parmList[parm]));
                }
                // 打开连接。
                sqlCmd.Connection.Open();
                try
                {
                    sqlCmd.ExecuteNonQuery();

                }
                catch (Exception ex)
                {
                    sqlCmd.Connection.Close();
                    // 不成功则给出提示。
                    throw new Exception(ex.ToString());
                }
                finally
                {
                    // 关闭连接。
                    sqlCmd.Connection.Close();
                }
            }
		}
		

		/// 返回存储过程执行的结果集
		/// </summary>
		/// <param name="pur_name">存储过程名称</param>
		/// <param name="parmList">存储过程的{参数--值}的集合</param>
		public static  void RunProcedure(string pur_name,Hashtable parmList  ,ref  int  returnValue)
		{
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                // 调用存储过程pur_name。
                SqlCommand sqlCmd = new SqlCommand(pur_name, Connection);
                sqlCmd.CommandType = CommandType.StoredProcedure;
                // 为输入参数赋值。
                foreach (string parm in parmList.Keys)
                {
                    sqlCmd.Parameters.Add(new SqlParameter("@" + parm, parmList[parm]));
                }
                // 打开连接。
                sqlCmd.Connection.Open();
                try
                {
                    returnValue = sqlCmd.ExecuteNonQuery();

                }
                catch (Exception ex)
                {
                    sqlCmd.Connection.Close();
                    // 不成功则给出提示。
                    throw new Exception(ex.ToString());
                }
                finally
                {
                    // 关闭连接。
                    sqlCmd.Connection.Close();
                }
            }
		}

		private static void AddParameterToCommand(SqlCommand cmd,SqlParameter[] param)
		{
			foreach(SqlParameter p in param)
			{
				cmd.Parameters.Add(p);
			}
		}

        private static SqlCommand CreateCommand(CommandType commandType, string commandText, SqlParameter[] param)
        {
            SqlCommand cmd = new SqlCommand();
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    cmd.CommandType = commandType;
                    cmd.Connection = Connection;

                    if (param != null)
                    {
                        AddParameterToCommand(cmd, param);
                    }
                    cmd.CommandText = commandText;
                }
                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }

            }
            return cmd;
        }

        public static int ExecuteCommand(CommandType commandType, string commandText, SqlParameter[] param)
        {
            SqlCommand cmd = CreateCommand(commandType, commandText, param);
            SqlTransaction trans = null;
            int i = 0;
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    cmd.Connection.Open();
                    trans = cmd.Connection.BeginTransaction();
                    cmd.Transaction = trans;
                    i = cmd.ExecuteNonQuery();
                    trans.Commit();
                }
                catch (Exception ex)
                {
                    trans.Rollback();
                    cmd.Connection.Close();
                    throw ex;
                }
                finally
                {
                    cmd.Connection.Close();
                }
            }
            return i;
        }

        public static DataTable GetSqlDataReaderToDataTable(string strSql, params SqlParameter[] parameters)
        {
            // 定义DataTable  
            DataTable datatable = new DataTable();
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(strSql, Connection);
                    command.CommandType = CommandType.Text;
                    command.CommandTimeout = 600;
                    if (parameters != null)
                    {
                        command.Parameters.AddRange(parameters);
                    }

                    SqlDataReader dataReader = null;
                    dataReader = command.ExecuteReader(CommandBehavior.CloseConnection);

                    ///动态添加表的数据列  
                    for (int i = 0; i < dataReader.FieldCount; i++)
                    {
                        DataColumn myDataColumn = new DataColumn();
                        myDataColumn.DataType = dataReader.GetFieldType(i);
                        myDataColumn.ColumnName = dataReader.GetName(i);
                        datatable.Columns.Add(myDataColumn);
                    }

                    // 添加表的数据  
                    while (dataReader.Read())
                    {
                        DataRow myDataRow = datatable.NewRow();
                        for (int i = 0; i < dataReader.FieldCount; i++)
                        {
                            myDataRow[i] = dataReader[i].ToString();
                        }
                        datatable.Rows.Add(myDataRow);
                        myDataRow = null;
                    }
                    ///关闭数据读取器  
                    dataReader.Close();
                }

                catch
                {
                    Connection.Close();
                }
                finally
                {
                    Connection.Close();
                }

            }
            return datatable;

        }

        /// <summary>
        /// 创建一个对象锁
        /// </summary>
        private static object newIdLocker = new object();

        /// <summary>
        /// 生成一个新的用于指定表的主键。
        /// </summary>
        /// <param name="table"></param>
        /// <returns></returns>
        public static string GetNewID(Type table)
        {
            lock (newIdLocker)
            {
                return Guid.NewGuid().ToString();
            }
        }

        public static string GetNewID()
        {
            lock (newIdLocker)
            {
                return Guid.NewGuid().ToString();
            }
        }

        /// <summary>
        /// 表数据中的主键最大值
        /// </summary>
        /// <param name="tableName">表名</param>
        /// <param name="keyColumnName">主键名</param>
        /// <returns>主键最大值</returns>
        public static int GetMaxId(string tableName, string ColumnName)
        {
            int maxId = 0;
            string str = "SELECT (ISNULL(MAX(" + ColumnName + "),0)+1) from " + tableName + "";
            maxId = getIntValue(str);
            return maxId;
        }

        public static int getIntValue(string sql)
        {
            int i = 0;
            using (SqlConnection Connection = new SqlConnection(connectionString))
            {
                try
                {
                    Connection.Open();
                    SqlCommand command = new SqlCommand(sql, Connection);
                    command.CommandType = CommandType.Text;

                    i = Convert.ToInt32(command.ExecuteScalar());
                }
                finally
                {
                    Connection.Close();
                }
               
            }
            return i;
        }


	}
}