From 04089d57b4146a00a574e513e563dda50d78fb3b Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Wed, 18 May 2022 18:18:23 +0800
Subject: [PATCH] Add  Queryable.OrderByDescending

---
 .../QueryableProvider/QueryableProvider.cs    | 51 ++++++++++++++++++-
 Src/Asp.Net/SqlSugar/Interface/IQueryable.cs  | 10 ++++
 2 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
index 2014407ec..43d153917 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
@@ -755,6 +755,11 @@ namespace SqlSugar
             this._OrderBy(expression, type);
             return this;
         }
+        public virtual ISugarQueryable<T> OrderByDescending(Expression<Func<T, object>> expression)
+        {
+            this._OrderBy(expression, OrderByType.Desc);
+            return this;
+        }
         public virtual ISugarQueryable<T> GroupBy(Expression<Func<T, object>> expression)
         {
             _GroupBy(expression);
@@ -3503,7 +3508,16 @@ namespace SqlSugar
             _OrderBy(expression, type);
             return this;
         }
-
+        public new virtual ISugarQueryable<T,T2> OrderByDescending(Expression<Func<T, object>> expression)
+        {
+            this._OrderBy(expression, OrderByType.Desc);
+            return this;
+        }
+        public virtual ISugarQueryable<T, T2> OrderByDescending(Expression<Func<T,T2, object>> expression)
+        {
+            this._OrderBy(expression, OrderByType.Desc);
+            return this;
+        }
         public new ISugarQueryable<T, T2> OrderBy(Expression<Func<T, object>> expression, OrderByType type)
         {
             _OrderBy(expression, type);
@@ -3906,6 +3920,21 @@ namespace SqlSugar
         #endregion
 
         #region Order
+        public new virtual ISugarQueryable<T, T2,T3> OrderByDescending(Expression<Func<T, object>> expression)
+        {
+            this._OrderBy(expression, OrderByType.Desc);
+            return this;
+        }
+        public virtual ISugarQueryable<T, T2,T3> OrderByDescending(Expression<Func<T, T2, object>> expression)
+        {
+            this._OrderBy(expression, OrderByType.Desc);
+            return this;
+        }
+        public virtual ISugarQueryable<T, T2,T3> OrderByDescending(Expression<Func<T, T2,T3, object>> expression)
+        {
+            this._OrderBy(expression, OrderByType.Desc);
+            return this;
+        }
         public new ISugarQueryable<T, T2,T3> OrderBy(string orderFileds)
         {
             base.OrderBy(orderFileds);
@@ -4445,6 +4474,26 @@ namespace SqlSugar
         #endregion
 
         #region OrderBy
+        public new virtual ISugarQueryable<T, T2, T3, T4> OrderByDescending(Expression<Func<T, object>> expression)
+        {
+            this._OrderBy(expression, OrderByType.Desc);
+            return this;
+        }
+        public virtual ISugarQueryable<T, T2, T3, T4> OrderByDescending(Expression<Func<T, T2, object>> expression)
+        {
+            this._OrderBy(expression, OrderByType.Desc);
+            return this;
+        }
+        public virtual ISugarQueryable<T, T2, T3, T4> OrderByDescending(Expression<Func<T, T2, T3, object>> expression)
+        {
+            this._OrderBy(expression, OrderByType.Desc);
+            return this;
+        }
+        public virtual ISugarQueryable<T, T2, T3,T4> OrderByDescending(Expression<Func<T, T2, T3, T4, object>> expression)
+        {
+            this._OrderBy(expression, OrderByType.Desc);
+            return this;
+        }
         public new ISugarQueryable<T, T2,T3,T4> OrderBy(string orderFileds)
         {
             base.OrderBy(orderFileds);
diff --git a/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs b/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
index 40cfb2f1a..8e51a29af 100644
--- a/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
+++ b/Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
@@ -76,6 +76,7 @@ namespace SqlSugar
 
         ISugarQueryable<T> OrderBy(string orderFileds);
         ISugarQueryable<T> OrderBy(Expression<Func<T, object>> expression, OrderByType type = OrderByType.Asc);
+        ISugarQueryable<T> OrderByDescending(Expression<Func<T, object>> expression);
         ISugarQueryable<T> OrderByIF(bool isOrderBy, string orderFileds);
         ISugarQueryable<T> OrderByIF(bool isOrderBy, Expression<Func<T, object>> expression, OrderByType type = OrderByType.Asc);
 
@@ -234,6 +235,8 @@ namespace SqlSugar
         #endregion
 
         #region OrderBy
+        new ISugarQueryable<T,T2> OrderByDescending(Expression<Func<T, object>> expression);
+        ISugarQueryable<T, T2> OrderByDescending(Expression<Func<T,T2, object>> expression);
         new ISugarQueryable<T, T2> OrderBy(string orderFileds);
         new ISugarQueryable<T, T2> OrderBy(Expression<Func<T, object>> expression, OrderByType type = OrderByType.Asc);
         ISugarQueryable<T, T2> OrderBy(Expression<Func<T, T2, object>> expression, OrderByType type = OrderByType.Asc);
@@ -331,6 +334,9 @@ namespace SqlSugar
         #endregion
 
         #region OrderBy
+        new ISugarQueryable<T, T2,T3> OrderByDescending(Expression<Func<T, object>> expression);
+        ISugarQueryable<T, T2,T3> OrderByDescending(Expression<Func<T, T2, object>> expression);
+        ISugarQueryable<T, T2, T3> OrderByDescending(Expression<Func<T, T2,T3, object>> expression);
         new ISugarQueryable<T, T2,T3> OrderBy(string orderFileds);
         new ISugarQueryable<T, T2, T3> OrderBy(Expression<Func<T, object>> expression, OrderByType type = OrderByType.Asc);
         ISugarQueryable<T, T2, T3> OrderBy(Expression<Func<T, T2, object>> expression, OrderByType type = OrderByType.Asc);
@@ -441,6 +447,10 @@ namespace SqlSugar
         #endregion
 
         #region OrderBy
+        new ISugarQueryable<T, T2, T3,T4> OrderByDescending(Expression<Func<T, object>> expression);
+        ISugarQueryable<T, T2, T3, T4> OrderByDescending(Expression<Func<T, T2, object>> expression);
+        ISugarQueryable<T, T2, T3, T4> OrderByDescending(Expression<Func<T, T2, T3, object>> expression);
+        ISugarQueryable<T, T2, T3, T4> OrderByDescending(Expression<Func<T, T2, T3,T4, object>> expression);
         new ISugarQueryable<T, T2, T3,T4> OrderBy(string orderFileds);
         new ISugarQueryable<T, T2, T3, T4> OrderBy(Expression<Func<T, object>> expression, OrderByType type = OrderByType.Asc);
         ISugarQueryable<T, T2, T3, T4> OrderBy(Expression<Func<T, T2, object>> expression, OrderByType type = OrderByType.Asc);