从数组创建选择列表

Question

  

可能重复：
  how to find the index particular items in the list using linq?

我正在尝试从字符串数组中创建IEnumerable<SelectListItem>。

string[] months = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };

model.month = months
        .Select(r => new SelectListItem{Text = r, Value = ???});

有没有办法在此查询中访问其索引？

Answer 1

使用重载Enumerable.Select方法：

model.month = months
    .Select((r,index) => new SelectListItem{Text = r, Value = index.ToString()});

Answer 2

尝试使用Enumerable.Select。

  

通过合并将序列的每个元素投影到新表单中   元素的索引。

model.month = months
        .Select((r, i) => new SelectListItem{Text = r, Value = i.ToString()});

Answer 3

根据lila G发布的链接上的示例

，Jeff应该适合您

string[] months = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
var query = months.Select((r, index) => new  { Text = r, Value = index });

调试器中的外观屏幕截图