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C# How to convert String into Time format used for Time Range?

Posted on 2010-11-22
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Last Modified: 2013-12-14
Hi there. I have a program that is able to retrieve sections/part of a log text file's time using tokenization.

The main aim of the program which is to retrieve the time part then proceed onto converting the string to a DateTime format which could be then used as a part of a Time Range timeline function.

However while converting the time into DateTime, the system outputs the results into "23/11/2010 9:31:00 PM" which correctly converts the time into at 12 Hour format but utilizes the Date function.

Therefore the question would be how to only convert the time and NOT output or process the date. And how can the time be converted into a 24 Hour format into HH:MM:SS?

Please advice on the codes. Thanks!

class Program
{
    static void Main(string[] args)
    {

        //System.Collections.Generic.IEnumerable<String> lines = File.ReadLines("C:\\Test\\ntfs2.txt");

        String value = "Thu Mar 02 1995 21:31:00,2245107,m...,r/rrwxrwxrwx,0,0,8349-128-3,C:/Program Files/AccessData/AccessData Forensic Toolkit/Program/wordnet/Adj.dat";

        //foreach (String r in lines)
        //{

        String[] token = value.Split(',');

        String[] datetime = token[0].Split(' ');

        String timeText = datetime[4]; // The String array contans 21:31:00

        DateTime time = Convert.ToDateTime(timeText); // Converts only the time

        Console.WriteLine(time);

    }
}

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Question by:VMthinker
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11 Comments
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 34194268
Change line 21 to:
Console.WriteLine(time.ToString("HH:mm:ss"));  // case-sensitive

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Author Comment

by:VMthinker
ID: 34194454
@kaufmed Are there other ways to convert at line 19 instead of the Console.writeline part? As I need to use the time format as a date rnage function.

@rkworlds Don't you think the questions are exactly the same?
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Expert Comment

by:mmahdi
ID: 34195523
Hi,

this should give you the time portion of the date

DateTime.Parse("23/11/2010 9:31:00 PM").TimeOfDay.ToString()
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Author Comment

by:VMthinker
ID: 34195744
@mmah If you look at my codes I am taking the time out from an array string but not the system.
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Expert Comment

by:käµfm³d 👽
ID: 34195783
>>  Are there other ways to convert at line 19 instead of the Console.writeline part?

Console.WriteLine() doesn't have anything to do with converting the date value--it only spits out its parameter to stdout. The ToString() method of the DateTime struct is overloaded to take a format parameter. This specifies how you want the DateTime to appear when output by ToString()--in this case, only the time portion:  HH:mm:ss.
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Author Comment

by:VMthinker
ID: 34195875
@Kaufmed Are there any other methods or ways that the time text that are in the log text files be converted to be used to time range timeline? Etc. Gather all the logs content form 21:30:45 to 22:46:55??
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Accepted Solution

by:
mmahdi earned 150 total points
ID: 34196027
VMThinker

if you post an example of the flat file maybe I can help. But see below how you can parse your value variable

            String value = "Thu Mar 02 1995 21:31:00,2245107,m...,r/rrwxrwxrwx,0,0,8349-128-3,C:/Program Files/AccessData/AccessData Forensic Toolkit/Program/wordnet/Adj.dat";

            String[] token = value.Split(',');

            foreach (string dateval in token)
            {
                DateTime timeval;
               
                if (DateTime.TryParse(dateval, out timeval))
                {
                    string time = DateTime.Parse(dateval).TimeOfDay.ToString();
                }                
            }
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LVL 75

Assisted Solution

by:käµfm³d 👽
käµfm³d   👽 earned 350 total points
ID: 34196130
You can use TimeSpan.TryParse:
static void Main(string[] args)
{
    TimeSpan t1, t2, t3, t4;

    TimeSpan.TryParse("08:00:03", out t1);
    TimeSpan.TryParse("09:00:01", out t2);
    TimeSpan.TryParse("08:55:09", out t3);
    TimeSpan.TryParse("07:01:00", out t4);

    Console.WriteLine(t3 >= t1 && t3 <= t2);    // Is t3 between t1 and t2?
    Console.WriteLine(t4 >= t1 && t4 <= t1);    // Is t4 between t1 and t2?

    Console.ReadKey();
}

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Expert Comment

by:käµfm³d 👽
ID: 34196180
Note: I didn't show it, but TryParse() returns true or false depending on whether or not the parse was successful (i.e. the timespan is a valid value), so you can check the return values of TryParse() prior to the WriteLine() calls above to be sure you are working with valid time values. Also, if TryParse() succeeds, the "out" parameter will be set to the converted time; otherwise its value will remain unchanged. The "out" keyword is required.
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Author Closing Comment

by:VMthinker
ID: 34203983
@Kaufmed The timespan and algorith that you showed really helped alot for the time range function! Thanks again!
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