v3.0.1

2021-06-02 20:00:25 +08:00
parent 6ea91cbaf6
commit e5063e1a4d
57 changed files with 1665 additions and 359 deletions
--- a/CC.Yi/CC.Yi.Common/LinqHelper.cs
+++ b/CC.Yi/CC.Yi.Common/LinqHelper.cs
@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace CC.Yi.Common
+{
+   public static class LinqHelper
+    {
+        //T是列表类型，S是排序的属性
+        public static IQueryable GetPageEntities<T,S>(IQueryable<T> myData, int pageSize, int pageIndex, out int total, Expression<Func<T, bool>> whereLambda=null, Expression<Func<T, S>> orderByLambda=null, bool isAsc=false)
+        {
+            total = myData.Where(whereLambda).Count();
+            if (isAsc)
+            {
+                var pageData = myData.Where(whereLambda)
+                              .OrderBy<T,S>(orderByLambda)
+                              .Skip(pageSize * (pageIndex - 1))
+                              .Take(pageSize).AsQueryable();
+                return pageData;
+            }
+            else
+            {
+                var pageData = myData.Where(whereLambda)
+                                 .OrderByDescending<T, S>(orderByLambda)
+                                 .Skip(pageSize * (pageIndex - 1))
+                                 .Take(pageSize).AsQueryable();
+                return pageData;
+            }
+        }
+    }
+}