SQLHelper

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data;

namespace LWSR.FBU.DAL
{
    public class SQLHelper
    {
        //连接字符串
        static string connStr = System.Configuration.ConfigurationManager.ConnectionStrings["connStr"].ConnectionString;
        /// <summary>
        /// 返回受影响的行数
        /// </summary>
        /// <param name="comText"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static int ExecuteNonQuery(string comText, params SqlParameter[] param)
        {
            using (SqlConnection conn = new SqlConnection(connStr))
            {
                using (SqlCommand cmd = new SqlCommand(comText, conn))
                {
                    if (param != null && param.Length != 0)
                    {
                        cmd.Parameters.AddRange(param);
                    }
                    if (conn.State == ConnectionState.Closed)
                    {
                        conn.Open();
                    }
                    return cmd.ExecuteNonQuery();
                }
            }
        }

        /// <summary>
        /// model是静态类型的调用方法
        /// </summary>
        /// <param name="comText"></param>
        /// <param name="param"></param>
        public static void zhixing(string comText, params SqlParameter[] param)
        {
            using (SqlConnection conn = new SqlConnection(connStr))
            {
                using (SqlCommand cmd = new SqlCommand(comText, conn))
                {
                    if (param != null && param.Length != 0)
                    {
                        cmd.Parameters.AddRange(param);
                    }
                    if (conn.State == ConnectionState.Closed)
                    {
                        conn.Open();
                    }
                    cmd.ExecuteNonQuery();
                }
            }
        }
        /// <summary>
        /// 返回一个数据集
        /// </summary>
        /// <param name="sqlStr">sql语句</param>
        /// <returns></returns>
        public static DataSet dataSet(string sqlStr)
        {
            SqlConnection conn = new SqlConnection(connStr);
            conn.Open();
            DataSet ds = new DataSet();
            try
            {
                SqlDataAdapter da = new SqlDataAdapter(sqlStr, conn);
                da.Fill(ds);
            }
            catch (Exception e)
            {
                throw new Exception(e.Message);
            }
            finally
            {
                conn.Close();
            }
            return ds;
        }
        /// <summary>
        /// 返回数据对象
        /// </summary>
        /// <param name="comText"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static object ExecuteScalar(string comText, params SqlParameter[] param)
        {
            using (SqlConnection conn = new SqlConnection(connStr))
            {
                using (SqlCommand cmd = new SqlCommand(comText, conn))
                {
                    if (param != null && param.Length != 0)
                    {
                        cmd.Parameters.AddRange(param);
                    }
                    if (conn.State == ConnectionState.Closed)
                    {
                        conn.Open();
                    }
                    object obj = cmd.ExecuteScalar();
                    cmd.Parameters.Clear();
                    return obj;
                }
            }
        }
        /// <summary>
        /// 返回table
        /// </summary>
        /// <param name="cmdText"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static DataTable Adapter(string cmdText, params SqlParameter[] param)
        {
            DataTable dt = new DataTable();
            using (SqlDataAdapter sda = new SqlDataAdapter(cmdText, connStr))
            {
                if (param != null && param.Length != 0)
                {

                    if (param[0] != null)
                        sda.SelectCommand.Parameters.AddRange(param);
                }
                sda.Fill(dt);
                sda.SelectCommand.Parameters.Clear();

            }
            return dt;
        }
        /// <summary>
        /// 向前读取记录
        /// </summary>
        /// <param name="cmdText"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static SqlDataReader ExectueReader(string cmdText, params SqlParameter[] param)
        {
            SqlConnection conn = new SqlConnection(connStr);
            //using (SqlCommand cmd = new SqlCommand(cmdText, conn))
            //{
            SqlCommand cmd = new SqlCommand(cmdText, conn);
            if (param != null && param.Length != 0)
            {
                cmd.Parameters.AddRange(param);
            }
            if (conn.State == ConnectionState.Closed)
            {
                conn.Open();
            }
            return cmd.ExecuteReader(CommandBehavior.CloseConnection);
            //}
        }

        /// <summary>
        /// 读取存储过程
        /// </summary>
        /// <param name="cmdText"></param>
        /// <param name="type"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static DataTable GetPro(string cmdText, CommandType type, params SqlParameter[] param)
        {
            DataTable dt = new DataTable();
            using (SqlDataAdapter sda = new SqlDataAdapter(cmdText, connStr))
            {
                new SqlCommand().CommandType = CommandType.StoredProcedure;
                if (param != null && param.Length != 0)
                {
                    sda.SelectCommand.Parameters.AddRange(param);
                }
                sda.Fill(dt);
            }
            return dt;
        }
        /// <summary>
        /// 批量插入数据
        /// </summary>
        /// <param name="table">目标数据</param>
        /// <param name="tableName">表名称</param>
        /// <param name="mapping"></param>
        public static void SqlBulkCopyInsert(DataTable table, string tableName, List<SqlBulkCopyColumnMapping> mapping)
        {
            using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connStr))
            {
                bulkCopy.DestinationTableName = tableName;
                if (mapping != null && mapping.Count != 0)
                {
                    foreach (SqlBulkCopyColumnMapping item in mapping)
                    {
                        bulkCopy.ColumnMappings.Add(item.SourceColumn, item.DestinationColumn);
                    }
                }
                    
                

                bulkCopy.WriteToServer(table);
            }
        }

        public static int BatchInert(string connectionString, string desTable, DataTable dt, int batchSize = 500)
        {
            using (var sbc = new SqlBulkCopy(connectionString, SqlBulkCopyOptions.UseInternalTransaction)
            {
                BulkCopyTimeout = 300,
                NotifyAfter = dt.Rows.Count,
                BatchSize = batchSize,
                DestinationTableName = desTable
            })
            {
                foreach (DataColumn column in dt.Columns)
                    sbc.ColumnMappings.Add(column.ColumnName, column.ColumnName);
                sbc.WriteToServer(dt);
            }

            return dt.Rows.Count;
        }
    }
}