DateTime.Now作为文件名

Question

I would like to give a document I've created programmatically a name which contains the returned value of DateTime.Now.ToString();

The trial failed when ":" symbol is a content of the file name.

Any Idea?

Answer 1

Avoid problemw with culture like this

DateTime.Now.ToString("yyyy-MMdd-HH-mm", CultureInfo.InvariantCulture)

also you can try out

string n = string.Format("typeoffile-{0:yyyy-MM-dd_hh-mm-ss-tt}.ext",
        DateTime.Now);

---

try this will work for you

String.Replace(".","_")

turn in

   DateTime.Now.ToString().Replace(".","_")

Answer 2

I would specify a format for DateTime.ToString() , for example:

DateTime.Now.ToString("yyyyMMddhhmmss") //results in "20131127103249"

If you want to go the String.Replace route, I suggest leveraging a useful method called Path.GetInvalidFileNameChars() :

string s = DateTime.Now.ToString();
foreach (char c in Path.GetInvalidFileNameChars()) // replace all invalid characters with an underscore
{
    s = s.Replace(c, '_');
}

Or, if you're into the whole brevity thing, you can do the same thing in a one-liner using LINQ:

var s = new String(DateTime.Now.ToString().Select(ch => Path.GetInvalidFileNameChars().Any(invalid => invalid == ch) ? '_' : ch).ToArray());

Answer 3

您可以使用替换功能替换:例如_

DateTime.Now.ToString().Replace(":","_");

Answer 4

Why don't you try removing the ":" symbol, ie filename will be:

20131127_0530

DateTime.Now.ToString("yyyyddMM_HHmm")

Answer 5

you should be using the custom ToString method specify a formatter ie:

DateTime.Now.ToString("ddMMyyyy") - shows daymonthyear