DateTimeFormatInfo()和FirstDayOfWeek的html helper问题

Question

今天我有个小问题困扰着我！！我已经创建了一个小的助手方法，我想总是返回星期一作为一周的第一天(即monday=0)，但似乎找不到哪里错了。我正在设置我“感觉”的是对流行文化的覆盖，但无济于事。

不再赘述，代码如下：

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;
}

用法：

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

无论如何，这总是从sunday=0开始。

有什么想法吗？

Answer 1

DayNames不依赖于FirstDayOfWeek属性，设置它不会有任何效果。你可以试着这样做：

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;

Answer 2

达林

现在，这是我想出来的：

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;
}

这“看起来”像预期的那样工作。谢谢你的指点。

吉姆