first commit

Complex.Application/Other/Common/Pagination.cs

@@ -0,0 +1,44 @@
+using System.Linq.Dynamic.Core;
+
+namespace Complex.Application.Common
+{
+    public static class Pagination
+    {
+        public static IQueryable<TSource> ToPagedByOrder<TSource>(this IQueryable<TSource> source,
+            CommonRequestDto commonRequest, out int rowsCount)
+        {
+            if (commonRequest.Length < 0)
+                commonRequest.Length = 20000;
+            if (commonRequest.Length == 0)
+                commonRequest.Length = 10;
+
+            rowsCount = source.Count();
+
+            if (commonRequest.sortDirection == SortDirection.desc)
+                commonRequest.SortField += " DESC";
+
+            source = source.OrderBy(commonRequest.SortField);
+
+            return source.Skip(commonRequest.Page * commonRequest.Length).Take(commonRequest.Length);
+        }
+        public static IQueryable<TSource> ToPaged<TSource>(this IQueryable<TSource> source, int page, int pageSize, out int rowsCount)
+        {
+            if (pageSize == -1)
+                pageSize = 20000;
+            if (pageSize == 0)
+                pageSize = 10;
+
+            rowsCount = source.Count();
+            return source.Skip(page * pageSize).Take(pageSize);
+        }
+        public static IQueryable<TSource> ToPaged<TSource>(this IQueryable<TSource> source, int page, int pageSize)
+        {
+            if (pageSize == -1)
+                pageSize = 20000;
+            if (pageSize == 0)
+                pageSize = 10;
+
+            return source.Skip(page * pageSize).Take(pageSize);
+        }
+    }
+}