答案 0 :(得分:2)
您可能希望在模型上设置一个可以绑定到下拉列表的属性。我用一个简单的例子来说明你的数据:
创建一个表示国家/地区表的类:
$currentDate = new DateTime('now'); //current date
$b_issued = new DateTime('2015-12-08 10:00:00'); //date when the book was issued
$b_time = 5; //number of days for which has been given a book
$interval = $b_issued->diff($currentDate);
$b_left_days = $b_time - $interval->d;
if ($b_left_days == 2) {
//...
}
现在填充表格中的数据列表,您应该通过调用数据库来执行此操作:
public class country
{
public string countries { get; set; }
public int id { get; set; }
}
绑定数据有多种方法,但简单的方法如下:
var countries = new List<country>();
countries.Add(new country() { id = 1, countries = "ind" });
countries.Add(new country() { id = 2, countries = "usa" });
countries.Add(new country() { id = 3, countries = "uk" });
countries.Add(new country() { id = 4, countries = "pak" });
countries.Add(new country() { id = 5, countries = "britan" });
在您的视图中,您将要绑定刚刚创建的对象。在这种情况下,它只是模型。
var countriesList = new List<SelectListItem>(
countries.Select(_ => new SelectListItem() {
Text = _.countries,
Value = _.id.ToString() }
)
);
return View(countriesList);
// You can also add countriesList as a property on a bigger model
希望这有帮助,祝你好运!