I recently converted a bunch of tables PK's from int to uniqueidentifier. Now in my code I am replacing certain checks like so:
我最近将一堆表PK从int转换为uniqueidentifier。现在在我的代码中，我正在替换某些检查，如下所示：
if (planDiagnosisID != 0)
with
同
if (planDiagnosisID != Guid.Empty)
Where planDiagnosisID is an int in the first one and a Guid in the second.
其中planDiagnosisID在第一个中是int而在第二个中是Guid。
Is this accurate?
这准确吗？
1 个解决方案
#1
5
Yes that is correct. Guid.Empty is the default value for Guid. It is a value type, so it can't be null.
对，那是正确的。 Guid.Empty是Guid的默认值。它是一个值类型，因此不能为null。
Or in code
或者在代码中
default(Guid) == Guid.Empty
Just as
就像
default(int) == 0
#1
5
Yes that is correct. Guid.Empty is the default value for Guid. It is a value type, so it can't be null.
对，那是正确的。 Guid.Empty是Guid的默认值。它是一个值类型，因此不能为null。
Or in code
或者在代码中
default(Guid) == Guid.Empty
Just as
就像
default(int) == 0