How to create date file in iso string in name?

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I’m having trouble creating a file with the following template:

2017-01-17T09:42:15.3419026-02:00_teste.txt

When I run the application to create appears this message:

No support for the given path format.

var dataHora = DateTimeOffset.Now.ToString("o");

dataHora.Replace(':', '-');
dataHora.Replace('/', '-');

File.WriteAllText(caminho + dataHora + "_teste.txt");

How do I create like this?

c# .net string replace

  • You could inform the result that appears from this path + dateHora + "_test.txt concatenation"

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1 answer

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Use the reference itself to change the result, in the form used the result of Replace()` Not being used anywhere, not being kept, the change is lost. Contrary to what you may be imagining, the method does not alter the object, it generates a new one, do so:

var dataHora = DateTimeOffset.Now.ToString("o").Replace(':', '-').Replace('/', '-');

Behold working in the ideone. And in the .NET Fiddle. Also put on the Github for future reference.

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