http://help.infragistics.com/NetAdvantage/WPF/2012.1/CLR4.0/?page=xamInputs_Masks.html

also in my previous post I suggest you what you should do in order to achieve your goal.

Hope this heslp you.

(For more read this http://stackoverflow.com/questions/848702/need-to-format-dates-in-dynamically-built-wpf-datagrid)

What this does is that when that grid is sorted based on that datecolumn it sorts values acc. to date and not as string

so 01-Jan-2012 comes before 01-Apr-2012

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For Infragistics XamDataGrid we are doing 

where converter is

public class DateToStringConverter : IValueConverter
{
    public object Convert(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        try
        {
            if (value == null || object.ReferenceEquals(value, DBNull.Value))
            {
                return string.Empty;
            }
            else 
            {
                if ((value) is DateTime || (value) is System.DateTime)
                {
                    return ((DateTime)value).ToEnglishDateTimeString(); //This method would return date vale in that user-defined format like "dd-MMM-yyyy"
                }
                else
                {
                    return string.Empty;
                }

            }
        }
        catch
        {
            return string.Empty;
        }
    }

public object ConvertBack(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
    try
    {
        if (value is string)
        {
            if (!string.IsNullOrEmpty(value))
            {
                return DateTime.Parse(value);
            }
        }
    }
    catch (Exception ex)
    {
    }
    return null;
    }
}

Now in infragistics Grid when this column is sorted since its a string and not a datetime value it sorts as string so 01-Apr-2012 comes before 01-Jan-2012 (which is wrong)

I want that column to remain as datetime column but its format should come from codebehind

Is this possible. Please attach a sample app of what you will suggest.

Thanks.