sqlhelper.cs.exclude

人事管理系统

using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.ComponentModel;
namespace SQLHelper
{
    /// <summary>
    /// Class1 的摘要说明。
    /// </summary>
    public class SQLHelper
    {
        // 连接数据源
        private SqlConnection myConnection;
        private readonly string RETURNVALUE = "RETURNVALUE";

        /// <summary>
        /// 打开数据库连接.
        /// </summary>
        private void Open()
        {
            // 打开数据库连接
            if (myConnection == null)
            {
                myConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["name"].ConnectionString);
            }
            if (myConnection.State == ConnectionState.Closed)
            {

                ///打开数据库连接
                myConnection.Open();

            }
        }

        /// <summary>
        /// 关闭数据库连接
        /// </summary>
        public void Close()
        {
            ///判断连接是否已经创建
            if (myConnection != null)
            {
                ///判断连接的状态是否打开
                if (myConnection.State == ConnectionState.Open)
                {
                    myConnection.Close();
                }
            }
        }
        public void runCmd(string strcmd, out SqlDataReader reader)
        {
            Open();
            SqlCommand cmd = new SqlCommand(strcmd, myConnection);
            reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        }
        /// <summary>
        /// 释放资源
        /// </summary>
        public void Dispose()
        {
            // 确认连接是否已经关闭
            if (myConnection != null)
            {
                myConnection.Dispose();
                myConnection = null;
            }
        }

        /// <summary>
        /// 执行存储过程
        /// </summary>
        /// <param name="procName">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);

            ///执行存储过程
            cmd.ExecuteNonQuery();

            ///关闭数据库的连接
            Close();

            ///返回存储过程的参数值
            return (int)cmd.Parameters[RETURNVALUE].Value;
        }

        /// <summary>
        /// 执行存储过程
        /// </summary>
        /// <param name="procName">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);
            ///执行存储过程
            cmd.ExecuteNonQuery();

            ///关闭数据库的连接
            Close();

            ///返回存储过程的参数值
            ///
            //return Convert.ToInt32((cmd.ExecuteScalar().ToString()));
            return (int)cmd.Parameters[RETURNVALUE].Value;
        }

        /// <summary>
        /// 执行存储过程
        /// </summary>
        /// <param name="procName">存储过程的名称</param>
        /// <param name="dataReader">返回存储过程返回值</param>
        public void RunProc(string procName, out SqlDataReader dataReader)
        {
            ///创建Command
            SqlCommand cmd = CreateCommand(procName, null);

            ///读取数据
            dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        }

        /// <summary>
        /// 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>
        /// <param name="dataReader">存储过程所需参数</param>
        public void RunProc(string procName, SqlParameter[] prams, out SqlDataReader dataReader)
        {
            ///创建Command
            SqlCommand cmd = CreateCommand(procName, prams);
            ///读取数据
            dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        }
        public void execProc(string procName, string[] prams)
        {
            Open();
            string strcmd = string.Format("exec {0} ", procName);
            if (prams != null)
            {
                for (int i = 0; i < prams.Length; i++)
                {
                    if (i != prams.Length - 1)
                    {
                        strcmd += "'" + prams[i] + "',";
                    }
                    else
                    {
                        strcmd += "'" + prams[i] + "'";
                    }
                }
            }
            SqlCommand cmd = new SqlCommand(strcmd, myConnection);
            cmd.ExecuteNonQuery();
        }

        /// <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)
        {
            ///打开数据库连接
            Open();

            ///设置Command
            SqlCommand cmd = new SqlCommand(procName, myConnection);
            cmd.CommandType = CommandType.StoredProcedure;

            ///添加把存储过程的参数
            if (prams != null)
            {
                foreach (SqlParameter parameter in prams)
                {
                    cmd.Parameters.Add(parameter);
                }
            }

            ///添加返回参数ReturnValue
            cmd.Parameters.Add(
                new SqlParameter(RETURNVALUE, SqlDbType.Int, 4, ParameterDirection.ReturnValue,
                false, 0, 0, string.Empty, DataRowVersion.Default, null));

            ///返回创建的SqlCommand对象
            return cmd;
        }


        /// <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 CreateParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value)
        {
            SqlParameter param;

            ///当参数大小为0时，不使用该参数大小值
            if (Size > 0)
            {
                param = new SqlParameter(ParamName, DbType, Size);
            }
            else
            {
                ///当参数大小为0时，不使用该参数大小值
                param = new SqlParameter(ParamName, DbType);
            }

            ///创建输出类型的参数
            param.Direction = Direction;
            if (!(Direction == ParameterDirection.Output && Value == null))
            {
                param.Value = Value;
            }

            ///返回创建的参数
            return param;
        }

        /// <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>
        /// <param name="Size">参数大小</param>
        /// <param name="Value">参数值</param>
        /// <returns>新的parameter 对象</returns>
        public SqlParameter CreateInParam(string ParamName, SqlDbType DbType, int Size, object Value)
        {
            ///创建输入类型的参数
            return CreateParam(ParamName, DbType, Size, ParameterDirection.Input, Value);
        }

        /// <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 CreateOutParam(string ParamName, SqlDbType DbType, int Size)
        {
            ///创建输出类型的参数
            return CreateParam(ParamName, DbType, Size, ParameterDirection.Output, null);
        }

        /// <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 CreateReturnParam(string ParamName, SqlDbType DbType, int Size)
        {
            ///创建返回类型的参数
            return CreateParam(ParamName, DbType, Size, ParameterDirection.ReturnValue, null);
        }
    }
}