Code optimization

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

@@ -20,6 +20,7 @@ namespace SqlSugar
                 case ResolveExpressType.SelectMultiple:
                 case ResolveExpressType.FieldSingle:
                 case ResolveExpressType.FieldMultiple:
+                    #region Filed
                     try
                     {
                         var value = ExpressionTool.DynamicInvoke(expression);
@@ -65,15 +66,21 @@ namespace SqlSugar
                     {
                         Check.ThrowNotSupportedException("NewArrayExpression");
                     } 
+                    #endregion
                     break;
                 case ResolveExpressType.ArraySingle:
-                    foreach (var item in expression.Expressions)
-                    {
-                        base.Expression = item;
-                        base.Start();
-                    }
+                    ArraySingle(expression);
                     break;
                 case ResolveExpressType.Join:
+                    Join(parameter, expression);
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        private void Join(ExpressionParameter parameter, NewArrayExpression expression)
+        {
             base.Context.ResolveType = ResolveExpressType.WhereMultiple;
             int i = 0;
             foreach (var item in expression.Expressions)
@@ -96,9 +103,14 @@ namespace SqlSugar
                     }
                 }
             }
-                    break;
-                default:
-                    break;
+        }
+
+        private void ArraySingle(NewArrayExpression expression)
+        {
+            foreach (var item in expression.Expressions)
+            {
+                base.Expression = item;
+                base.Start();
             }
         }
     }