BaseWarehouse类，新增 ImportExcelToMemory,DataImport函数

WarehouseMgr/Tnb.WarehouseMgr.Entities/Attributes/RelationalFieldAttribute.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Tnb.WarehouseMgr.Entities.Attributes
+{
+
+    [AttributeUsage(AttributeTargets.Property)]
+    public class RelationalFieldAttribute : Attribute
+    {
+        /// <summary>
+        /// 关联表名称
+        /// </summary>
+        public string Table { get; set; }
+        /// <summary>
+        /// 字段
+        /// </summary>
+        public string Field { get; set; }
+    }
+}