C# (CSharp) DBNullHelper.IsNull示例

示例#1

        public void IsNull_NonNullNullableValue_ShouldBeFalse()
        {
            int?i = 0;

            Assert.IsFalse(DBNullHelper.IsNull(i));
        }

示例#2

        public void IsNull_NullNullableValue_ShouldBeTrue()
        {
            int?i = null;

            Assert.IsTrue(DBNullHelper.IsNull(i));
        }

示例#3

        public void IsNull_ValueType_ShouldBeFalse()
        {
            int i = 0;

            Assert.IsFalse(DBNullHelper.IsNull(i));
        }

示例#4

        public void IsNull_NonNullObject_ShouldBeFalse()
        {
            object o = new object();

            Assert.IsFalse(DBNullHelper.IsNull(o));
        }

示例#5

 public void IsNull_DBNullValue_ShouldBeTrue()
 {
     Assert.IsTrue(DBNullHelper.IsNull(DBNull.Value));
 }

示例#6

        public void IsNull_NullObject_ShouldBeTrue()
        {
            object o = null;

            Assert.IsTrue(DBNullHelper.IsNull(o));
        }