Code Snippet 1: Best way to convert string to DateTime

Aravind Kumar    Code Snippets     code snippet, Date conversion

This is the best way to convert string to Date
the following code convert string to date which is in
“d/M/yyyy” or “dd/MM/yyyy” or “d/MM/yyyy” or “dd/M/yyyy”

Date Conversion

string MyDate = "12/12/2012";
DateTime _MyDate;
if (!DateTime.TryParseExact(MyDate, new[] { "d/M/yyyy", "dd/MM/yyyy", "d/MM/yyyy", "dd/M/yyyy" }, CultureInfo.InvariantCulture, DateTimeStyles.None, out _MyDate))
{
this._message = "Invalid Date";
// do here with invalid date
}
_MyDate
// do here  with valid date

Function:

Date Conversion Function

public static bool ToDate(string DateString, out DateTime Date)
        {
            if (!DateTime.TryParseExact(DateString, new[] { "d/M/yyyy", "dd/MM/yyyy", "d/MM/yyyy", "dd/M/yyyy" }, System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.None, out Date))
                return false;
            return true;
        }

Remove duplicates in a string array

Aravind Kumar    C#.NET     array, duplicate values, remove duplicates in array, string array

These are the followings ways, where we can filter a string array to remove the duplicates.

HashSet

public static string[] RemoveDuplicates(string[] s)
{
HashSet set = new HashSet(s);
string[] result = new string[set.Count];
set.CopyTo(result);
return result;
}

List 1

private static string PreviousItem;

private static bool Match(string item)
{
    bool result = (item == PreviousItem);
    PreviousItem = item;
    return result;
}

public static string[] NoDuplicates(string[] input)
{
    PreviousItem = null;
    List<string> result = new List<string>(input);
    result.Sort();
    result.RemoveAll(Match);
    return result.ToArray();
}