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FrameWork/SqlSugar/ExpressionsToSql/Subquery/Items/SubOrderBy.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace SqlSugar
+{
+    public class SubOrderBy : ISubOperation
+    {
+        public bool HasWhere
+        {
+            get; set;
+        }
+
+        public string Name
+        {
+            get { return "OrderBy"; }
+        }
+
+        public Expression Expression
+        {
+            get; set;
+        }
+
+        public int Sort
+        {
+            get
+            {
+                return 480;
+            }
+        }
+
+        public ExpressionContext Context
+        {
+            get; set;
+        }
+
+        public string GetValue(Expression expression)
+        {
+            if (this.Context is OracleExpressionContext)
+            {
+                throw new Exception("Oracle Subquery can't OrderBy");
+            }
+            var exp = expression as MethodCallExpression;
+            var argExp = exp.Arguments[0];
+            var result = "ORDER BY " + SubTools.GetMethodValue(this.Context, argExp, ResolveExpressType.FieldSingle);
+            var selfParameterName = this.Context.GetTranslationColumnName((argExp as LambdaExpression).Parameters.First().Name) + UtilConstants.Dot;
+            result = result.Replace(selfParameterName, string.Empty);
+            return result;
+        }
+    }
+    public class SubOrderByDesc : ISubOperation
+    {
+        public bool HasWhere
+        {
+            get; set;
+        }
+
+        public string Name
+        {
+            get { return "OrderByDesc"; }
+        }
+
+        public Expression Expression
+        {
+            get; set;
+        }
+
+        public int Sort
+        {
+            get
+            {
+                return 480;
+            }
+        }
+
+        public ExpressionContext Context
+        {
+            get; set;
+        }
+
+        public string GetValue(Expression expression)
+        {
+            var exp = expression as MethodCallExpression;
+            var argExp = exp.Arguments[0];
+            var result = "ORDER BY " + SubTools.GetMethodValue(this.Context, argExp, ResolveExpressType.FieldSingle)+" DESC";
+            var selfParameterName = this.Context.GetTranslationColumnName((argExp as LambdaExpression).Parameters.First().Name) + UtilConstants.Dot;
+            result = result.Replace(selfParameterName, string.Empty);
+            return result;
+        }
+    }
+}