html helper issue with DateTimeFormatInfo() and FirstDayOfWeek

I've got a little issue that's bugging me today!! I've created a little helper method that I want to ALWAYS return monday as the 1st day of week (i.e. monday=0) but can't 开发者_如何学Cseem to figure out where i'm going wrong. I'm setting what I 'feel' is an override of the prevailing culture but to no avail.

Without further ado, the code:

public static string ComboDaysOfWeekNumber(this HtmlHelper helper, 
                     string id, string selectedValue)
{
    var cultureInfo = new DateTimeFormatInfo();
    cultureInfo.FirstDayOfWeek = DayOfWeek.Monday;
    var newitems = cultureInfo
        .DayNames
        .Select((dayName, index) => new SelectListItem
        {
            Value =(index).ToString(),
            Text = dayName,
            Selected = (selectedValue == dayName)
        });

    var result = helper.DropDownList(id, newitems).ToHtmlString();
    return result;
}

usage:

<%=Html.ComboDaysOfWeekNumber("weekSplitEnd", myModelDayNo.ToString())%>

No matter what, this is ALWAYS starting on sunday=0.

any thoughts out there??

---

DayNames is not dependent on the FirstDayOfWeek property and setting it won't have any effect. You could try this instead:

var cultureInfo = new DateTimeFormatInfo();
var dayNames = new[] 
{
    DayOfWeek.Monday, DayOfWeek.Tuesday, DayOfWeek.Wednesday, 
    DayOfWeek.Thursday, DayOfWeek.Friday, DayOfWeek.Saturday, 
    DayOfWeek.Sunday 
}.Select(cultureInfo.GetDayName);

var newitems = dayNames
    .Select((dayName, index) => new SelectListItem
    {
        Value =(index).ToString(),
        Text = dayName,
        Selected = (selectedValue == dayName)
    });

var result = helper.DropDownList(id, newitems).ToHtmlString();
return result;

---

Darin,

back now, here's what I came up woth:

public static MvcHtmlString ComboDaysOfWeekNumber(this HtmlHelper helper, 
                              string id, int selectedValue)
{

    var dayNames = new[]
                       {
                           DayOfWeek.Monday, DayOfWeek.Tuesday, 
                           DayOfWeek.Wednesday, DayOfWeek.Thursday, 
                           DayOfWeek.Friday, DayOfWeek.Saturday,
                           DayOfWeek.Sunday
                       };

    var newitems = dayNames
        .Select((dayName, index) => new SelectListItem
        {
            Value =(index).ToString(),
            Text = dayName.ToString(),
            Selected = (selectedValue == index)
        });

    var result = helper.DropDownList(id, newitems);
    return result;
}

this 'seems' to work as expected. thanks for the pointers.

jim