Getting Error while creating file in C#

Question

I am getting error to create a file While used string variable as current time in filename. Error as

An unhandled exception of type 'System.NotSupportedException' occurred in mscorlib.dll

Additional information: The given path's format is not supported.

I couldn't find what is wrong in the code and I tried without "path" variable it will successfully run. I didn't understand what is happening when I used "cTime" variable for create dynamic filename.

static void Main(string[] args)
        {
            string path = @"C:\\Reminder_Logs\\";
            string cTime = DateTime.Now.ToString("HH:mm").Trim();
            using (StreamWriter srRun = File.AppendText(path + "log_Reminder_" + cTime + ".txt"))
            {
                using (StreamWriter sr = File.AppendText(path + "log_Start.txt"))
                {
                    sr.WriteLine("reminder file  created!!! " + DateTime.Now.ToString("HH:mm"));
                }
            }

        }

as suggested by Romano, you must not use colons try this string cTime = DateTime.Now.ToString("HH_mm").Trim(); — kashi_rock
– kashi_rock, Commented Jun 2, 2017 at 9:04

pitersmx · Accepted Answer · 2017-06-02 09:08:24Z

2

The : character cannot be used in file name, please use

string cTime = DateTime.Now.ToString("HHmm").Trim(); for example instead.

answered Jun 2, 2017 at 9:08

pitersmx

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Mehmet Topçu · Accepted Answer · 2017-06-02 09:16:38Z

1

The problem in your code is that, path contains : you can try this

string cTime = DateTime.Now.ToString("HH.mm").Trim();

edited Jun 2, 2017 at 9:16

answered Jun 2, 2017 at 9:10

Mehmet Topçu

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Comments

Gowri Pranith Kumar · Accepted Answer · 2017-06-02 09:10:58Z

1

: char is not accepted in the file path path.getinvalidfilenamechars() gives all the invalid chars in the file path

answered Jun 2, 2017 at 9:10

Gowri Pranith Kumar

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