Remove AM PM from Time String using C#

In this blog you will learn how to Remove AM PM from Time String using C#.

It’s always fun as well as frustration at times working with DateTime in C#.

While working with one of the application, I had a requirement to remove the trailing AM/PM from time string which we were reading from as .csv file.

If anyone out there with similar requirement, he/she can straight away refer to this post and no need to think on writing the logic. So thought of sharing it.


                                           Remove AM PM from Time String using C#

CSV File:

Name	DOJ	Check in Time
Dipendra	4/15/2016	9:00:00 AM
Mahesh	4/12/2016	2:30:00 PM

Code Snippets:

Function to read data from input file:

public void ReadDataFromFile(string fileName)
{
 string Name;
 DateTime DOJ;
 var contents = System.IO.File.ReadAllText(fileName).Split('\n');
 var csv = from line in contents
           select line.Split(',').ToArray();

 int headerRows = 1;
 foreach (var row in csv.Skip(headerRows)
         .TakeWhile(r => r.Length > 1 && r.Last().Trim().Length > 0))
 {
     Name = row[0];
     DOJ = Convert.ToDateTime(row[1]) + TimeSpan.Parse(FormatTime(row[2]));
 }
}

Function to format time by stripping out AM/PM string:

protected string FormatTime(string inputTime)
    {
        string outputTime = string.Empty;
        string timeFormat = inputTime.Substring(inputTime.Length - 2);
        switch (timeFormat)
        {
            case ("AM"):
                outputTime = inputTime.Replace("AM", "");
                break;
            case ("PM"):
                int hours = 0;
                int.TryParse(inputTime.Replace("PM", ""), out hours);
                outputTime = (hours + 12).ToString();
                break;
        }
        return outputTime;
    }

Hope this post was useful and saved your time.

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