From db1b8c5cd3a2c93707c1e6bb2fce210f09779f8c Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Sat, 25 May 2019 10:08:08 +0800
Subject: [PATCH] Update Exp to sql

---
 .../ExpressionsToSql/ResolveItems/BaseResolve.cs    | 13 +++++++++++++
 .../ResolveItems/UnaryExpressionResolve.cs          |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/BaseResolve.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/BaseResolve.cs
index cdb8323c1..828e883f1 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/BaseResolve.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/BaseResolve.cs
@@ -253,6 +253,19 @@ namespace SqlSugar
                 this.Context.Result.Replace(ExpressionConst.FormatSymbol, "NOT");
             }
         }
+        protected void AppendNegate(object Value)
+        {
+            var isAppend = !this.Context.Result.Contains(ExpressionConst.FormatSymbol);
+            var lastCharIsSpace = this.Context.Result.LastCharIsSpace;
+            if (isAppend)
+            {
+                this.Context.Result.Append(lastCharIsSpace ? "-" : " -");
+            }
+            else
+            {
+                this.Context.Result.Replace(ExpressionConst.FormatSymbol, "-");
+            }
+        }
 
         protected MethodCallExpressionArgs GetMethodCallArgs(ExpressionParameter parameter, Expression item)
         {
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/UnaryExpressionResolve.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/UnaryExpressionResolve.cs
index d55941048..e1e6403f4 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/UnaryExpressionResolve.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/UnaryExpressionResolve.cs
@@ -123,6 +123,8 @@ namespace SqlSugar
             parameter.CommonTempData = CommonTempDataType.Append;
             if (nodeType == ExpressionType.Not)
                 AppendNot(parameter.CommonTempData);
+            if (nodeType == ExpressionType.Negate)
+                AppendNegate(parameter.CommonTempData);
             base.Start();
             parameter.BaseParameter.CommonTempData = parameter.CommonTempData;
             parameter.BaseParameter.ChildExpression = base.Expression;