Set ListBox item data format c#

Question

Sorry if the title make you feel confusing because of my bad english. I have a ListBox which contain many items which have time format (For example: 00:02:22:33) I want to convert this time format into minutes

For example: 00:02:22:33 -> 02 hours = 120 minutes
                             33 seconds = 33/60 = 0.55 minutes
So result is 120+22+0.55 = 142.55

What i'm trying is writing a method like:

public static void Timeconvert(ListBox l) 
   {   
     foreach (var item in l.Items)
     {
        int x, int y, int z;             //It just to show you my thought
        if(item.format = 00:x:y:z)       
          {                                  
           int result =  x*60 +y + z/60 ;
           item = result.Tostring();
          }
     } 
  } 

I'm new to C# so i explained as detail as i could, so please help me :(

Answer 1

Just parse the string as span of time and use TotalMinutes property.

var time = TimeSpan.Parse("00:02:22:33");
var convertedToMinutes = time.TotalMinutes;  //Returns 142.55

This will update your list items

for (int i = 0; i < listBox1.Items.Count; i++)
{
    TimeSpan time = TimeSpan.Parse(listBox1.Items[i].ToString());
    listBox1.Items[i] = time.TotalMinutes;
}

Alternately, TryParse() can be used for handling strings in an incorrect format: if (TimeSpan.TryParse(listBox1.Items[i].ToString(), out time)) { listBox1.Items[i] = time.TotalMinutes; } if (TimeSpan.TryParse(listBox1.Items[i].ToString(), out time)) { listBox1.Items[i] = time.TotalMinutes; }

Answer 2

You may try following:

var regex = new System.Text.RegularExpressions.Regex(@"00:\d{2}:\d{2}:\d{2}");
foreach (var item in l.Items)
{
    if (regex.IsMatch(item))
    {
        item =  TimeSpan.Parse(item).TotalMinutes.ToString();
    }
}