CODEWITHSUNDEEP
c#loopsif-statement
KlydeMonroe
KlydeMonroe

Reputation: 195

Loop to check if directories exist

I am a newbie trying to populate a Months drop-down based on whether the directories exists for the particular month.

I know the directories names will be Jan 2010, Feb 2010, Mar 2015 and so on...

I am currently using... 

if (System.IO.Directory.Exists("C:\\Desktop\\Month\\Jan\\"))
{
    DropDownList1.Items.Add("Jan 2015");
}
if (System.IO.Directory.Exists("C:\\Desktop\\Month\\Feb\\"))
{
    DropDownList1.Items.Add("Feb 2015");  
}
if (System.IO.Directory.Exists("C:\\Desktop\\Month\\March\\"))
{
    DropDownList1.Items.Add("March 2015");
}

How can I make this easier? I just want to loop through and if directory exists add particular name to the drop-down.

Upvotes: 0

Views: 1134

Answers (3)

Thomas Ayoub
Thomas Ayoub

Reputation: 29451

You can store your months in a list and iterate over it:

List<string> months = new List<string>()
{
    "Jan", "Feb", "Mar", "Apr", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec"
};

foreach (string month in months)
{
    if (System.IO.File.Exists("C:\\Desktop\\Month\\" + month))
    {
        DropDownList1.Items.Add(month + " 2015");
    }
}

Or if you like Linq:

foreach (string mounth in mounths.Where(mounth => System.IO.Directory.Exists("C:\\Desktop\\Month\\" + mounth)))
{
    DropDownList1.Items.Add(mounth + " 2015");
}

If you want some automatic stuff:

Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US"); // <== Or any culture you like
List<string> monthNames = new List<string>(System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.MonthGenitiveNames);
foreach (string month in months)
{
    if (System.IO.Directory.Exists("C:\\Desktop\\Month\\" + month))
    {
        DropDownList1.Items.Add(month + " 2015");
    }
}

Upvotes: 3

Fabjan
Fabjan

Reputation: 13676

Another approach on this one:

string src = @"C:\Desktop\Month\";            
string[] values = { "Jan", "Feb", "March", "Apr", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec"};
DropDownList1.Items.AddRange(Directory.GetDirectories(src).Where(d => months.Contains(d.Replace(src, ""))).Select(d => d.Replace(src, "")));

Upvotes: 1

Devesh
Devesh

Reputation: 4550

One idea that comes to my mind is that you can use something like this 

    List<String> wehaveadd = new List<String>();
    wehaveadd.Add("Jan");
    wehaveadd.Add("Feb"); // do all the months

   foreach(var item in wehaveadd){
     var path = "C:\\Desktop\\Month\\" + item;
     if (System.IO.Directory.Exists(path))
     {
      DropDownList1.Items.Add(item + " 2015");
     }
   }

Upvotes: 0

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