C＃ToShortDateString

Question

I wrote this code in vb:

expireDate = (DateTime.Parse(decal.DecalExpireDate).ToShortDateString).ToString

Now I'm trying to write the same code in c#, this is what I came up with:

expireDate = decal.DecalExpireDate.ToString();
expireDate = DateTime.Parse(expireDate).ToShortDateString();

Does anybody know how to simplify the c# code so it's one line and two. It's bugging me that I can do it in one line with vb, but not in c#.

decal.DecalExpireDate is a smallDateTime that I'm retrieving with linq. expireDate is a string that I'm returning in a function

Answer 1

expireDate = DateTime.Parse(decal.DecalExpireDate.ToShortDateString()).ToString();

或者，更好的是

expireDate = decal.DecalExpireDate.Date.ToString();

Answer 2

在VB中几乎完全是这样：

    expireDate = DateTime.Parse(decal.DecalExpireDate.ToString()).ToShortDateString();

Answer 3

There is no need to call Parse here, because you are starting with a nullable DateTime (based on your comments). In fact, you'll get an error message if you try to parse your date when it's null.

This will work as long as the decal expire date is not null:

var expireDate = decal.DecalExpireDate.Value.ToShortDateString();

To be safer, though, you should check for null first:

var expireDate = decal.DecalExpireDate != null ? decal.DecalExpireDate.Value.ToShortDateString() : null;

You can read more about nullable types here: http://msdn.microsoft.com/en-us/library/2cf62fcy.aspx .

Answer 4

var expireDate = DateTime.Parse(decal.DecalExpireDate).ToShortDateString;

Answer 5

SmallDateTime should already be returned as a DateTime format ( SQL-CLR Type Mapping (LINQ to SQL) ).

It should be as simple as:

expireDate = decal.DecalExpireDate.ToShortDateString();