dapper List SqlBulkCopy

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data;
using Dapper;
using DapperExtensions.Sql;
using DapperExtensions;

namespace 读取EXCEL中的内容
{
  public  class dapperInsertBatch
    {
        /// <summary>  
        /// 批量插入功能  
        /// </summary>  
        public void InsertBatch<T>(IDbConnection conn, IEnumerable<T> entityList, IDbTransaction transaction = null) where T : class
        {
            var tblName = string.Format("dbo.{0}", typeof(T).Name);
            var tran = (SqlTransaction)transaction;
            using (var bulkCopy = new SqlBulkCopy(conn as SqlConnection, SqlBulkCopyOptions.TableLock, tran))
            {
                bulkCopy.BatchSize = entityList.Count();
                bulkCopy.DestinationTableName = tblName;
                var table = new DataTable();
                DapperExtensions.Sql.ISqlGenerator sqlGenerator = new SqlGeneratorImpl(new DapperExtensionsConfiguration());
                var classMap = sqlGenerator.Configuration.GetMap<T>();
                var props = classMap.Properties.Where(x => x.Ignored == false).ToArray();
                foreach (var propertyInfo in props)
                {
                    bulkCopy.ColumnMappings.Add(propertyInfo.Name, propertyInfo.Name);
                    table.Columns.Add(propertyInfo.Name, Nullable.GetUnderlyingType(propertyInfo.PropertyInfo.PropertyType) ?? propertyInfo.PropertyInfo.PropertyType);
                }
                var values = new object[props.Count()];
                foreach (var itemm in entityList)
                {
                    for (var i = 0; i < values.Length; i++)
                    {
                        values[i] = props[i].PropertyInfo.GetValue(itemm, null);
                    }
                    table.Rows.Add(values);
                }
                bulkCopy.WriteToServer(table);
            }
        }

    }
}

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