增加Object.Between方法和测试

Falcon.SugarApi.Test/ObjectExtendTest.cs

@@ -137,7 +137,7 @@ namespace Falcon.SugarApi.Test
 
             var o1 = new object();
             Assert.IsTrue(o1.In(o1));
-            Assert.IsFalse(o1.In( new object(),new object()));
+            Assert.IsFalse(o1.In(new object(),new object()));
 
             var o2 = new ObjWithComparable { val = 1 };
             var o22 = new ObjWithComparable { val = 1 };
@@ -145,6 +145,18 @@ namespace Falcon.SugarApi.Test
             Assert.IsTrue(o2.In(o22,o23));
         }
 
+        /// <summary>
+        /// 应用动态比较的方式比较对象是否在另外两个对象区间。
+        /// </summary>
+        [TestMethod]
+        public void ObjectBetweenTest() {
+            Assert.IsTrue(1.Between(0,2));
+            Assert.IsFalse(3.Between(0,1));
+            var now = DateTime.Now;
+            Assert.IsTrue(now.Between(now.AddSeconds(-1),now.AddSeconds(1)));
+            Assert.IsFalse(now.Between(now.AddSeconds(1),now.AddSeconds(2)));
+        }
+
     }
     /// <summary>
     /// 扩展属性测试类

Falcon.SugarApi/DateTimeExtend.cs

@@ -145,9 +145,32 @@ namespace Falcon.SugarApi
         /// <param name="start">开始时间</param>
         /// <param name="end">结束时间</param>
         /// <returns>True是，False否</returns>
-        public static bool Between(this DateTime? dt,DateTime start,DateTime? end = null) {
-            end ??= DateTime.Now;
-            return dt > start && dt <= end;
+        //public static bool Between(this DateTime? dt,DateTime start,DateTime? end = null) {
+        //    end ??= DateTime.Now;
+        //    return dt > start && dt <= end;
+        //}
+
+        /// <summary>
+        /// 时间是否处于某个时间段内
+        /// </summary>
+        /// <param name="dt">要判断的时间</param>
+        /// <param name="start">开始时间</param>
+        /// <param name="end">结束时间</param>
+        /// <returns>True是，False否</returns>
+        public static bool Between(this DateTime? dt,DateTime? start,DateTime? end) {
+            if(dt==null) {
+                return false;
+            }
+            if(start == null && end == null) {
+                throw new Exception("给定的时间范围无效");
+            }
+            if(start == null) {
+                return dt < end;
+            }
+            if(end == null) {
+                return dt >= start;
+            }
+            return dt >= start && dt <= end;
         }
     }
 

Falcon.SugarApi/ObjectExtend.cs

@@ -248,6 +248,37 @@ namespace Falcon.SugarApi
         /// <param name="values">目标对象数组</param>
         /// <returns>不在数组中返回True，否则False</returns>
         public static bool NotIn<T>(this T obj,params T[] values) => !obj.In(values);
+
+        /// <summary>
+        /// 比较值是否在给定的上下限之间。包含下限但不包含上限。
+        /// </summary>
+        /// <typeparam name="T">值类型</typeparam>
+        /// <param name="obj">比较对象</param>
+        /// <param name="min">最小值</param>
+        /// <param name="max">最大值</param>
+        /// <returns>是否包含在最小值和最大值之间</returns>
+        /// <exception cref="Exception">给定的参数无法进行比较</exception>
+        public static bool Between<T>(this T? obj,T? min,T? max) {
+            if(obj == null) {
+                return false;
+            }
+            if(min == null && max == null) {
+                throw new Exception("min和max不能都为null");
+            }
+            dynamic? c = obj, i = min, x = max;
+            try {
+                if(i == null) {
+                    return c < x;
+                }
+                if(x == null) {
+                    return c >= i;
+                }
+                return c >= i && c <= x;
+            }
+            catch(Exception ex) {
+                throw new Exception("给定的参数无法进行比较",ex);
+            }
+        }
     }
 
     /// <summary>