Update exp to sql

Src/Asp.Net/SqlServerTest/UnitTest/UCustom09.cs

@@ -19,6 +19,14 @@ namespace OrmTest
             db.CodeFirst.InitTables<Unitadfaint21>();
             db.Insertable(new Unitadfaint21() { id = 1 , id2=22 }).ExecuteCommand();
             var list2 = db.Queryable<Unitadfaint21>().ToList();
+            
+            var list3=db.Queryable<Order>()
+              // .Where(it=>SqlFunc.ToString(it.Id>0?1:0)=="")
+               .Select(it => new
+             {
+                 count = SqlFunc.AggregateSum(it.Id < 20 ? 1 : 0)
+                 //count  = SqlFunc.AggregateSum(SqlFunc.IIF(b.客户确认状态 < 20, 1, 0))
+             }).ToListAsync();
         }
 
         public class Unitadfaint21

Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs

@@ -547,6 +547,10 @@ namespace SqlSugar
             {
                 parameter.CommonTempData = DateTime.Now.Date;
             }
+            else if (item is ConditionalExpression) 
+            {
+                parameter.CommonTempData = GetNewExpressionValue(item);
+            }
             else if (IsDateDate(item))
             {
                 parameter.CommonTempData = GetNewExpressionValue(item);
@@ -585,7 +589,7 @@ namespace SqlSugar
                     methodCallExpressionArgs.IsMember = false;
                 }
             }
-            if (IsDateDate(item) || IsDateValue(item)|| IsDateItemValue(item))
+            if (IsDateDate(item) || IsDateValue(item)|| IsDateItemValue(item)||item is ConditionalExpression)
             {
                 methodCallExpressionArgs.IsMember = true;
             }