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c#stringbuilderverbatim-string

.NET StringBuilder and verbatim string literal

In my Application there is a class that works with PdfSharp to generate some PDF reports. I specified output folder as a string with verbatim

string file_path = @"D:\Intranet\Students\DailyMarks\";

Also there is a StringBuilder that generates file name based on some ID and DateTime:

... sb.Append(document.Type); sb.Append(document.Id); sb.Append(DateTime.Now.ToShortString());

And finally I do the following

file_path + sb.toString();

But my Application cathes an exception. After debugging session I see that actually my file_path is 

file_path = "D:\\Intranet\\Students\\DailyMarks\\...";

As I understand it happens after concatenation of origin file with StringBuilder's toString() call. I tried to replace file_path string with something like this:

file_path = file_path.Replace(@"\\",@"\");

but it doesn't work. Where did I do wrong?

Solution

  • Probably this is caused by the DateTime.Now.ToShortString() method, which adds forbidden characters to the path (:).