[英]DropDownListFor is not binding with model property
I do not know why dropdownlist is not working in this particular case: 我不知道为什么dropdownlist在这种情况下不起作用:
I know, that i have ProjectID > 0, but in dropdownlist i always see first item selected. 我知道,我的ProjectID> 0,但是在下拉列表中,我总是看到选择的第一项。
Controller: 控制器:
Helpers h = new Helpers();
[HttpGet]
[ActionName("Timesheet")]
public ActionResult TimeSheet(LoggedAssociate assoc, DateChooserModel model)
{
List<TimeReport> timeReports = db.TimeReports.Include("TimeEntries.Project").Where(
tr => tr.AssociateID == assoc.ID &&
tr.DateSubmitted >= model.StartDate &&
tr.DateSubmitted <= model.FinishDate).ToList();
ViewBag.Projects = h.GetProjects(0);
return View(timeReports);
}
Helper: 帮手:
public class Helpers
{
public MyRepository db = new MyRepository();
public IEnumerable<SelectListItem> GetProjects(short? selectedValue)
{
List<SelectListItem> _projects = new List<SelectListItem>();
_projects.Add(new SelectListItem() { Text = "Project...", Value = "0", Selected = selectedValue == 0 });
foreach (var project in db.GetProjects())
{
_projects.Add(new SelectListItem()
{
Text = project.Name,
Value = project.Id.ToString(),
Selected = selectedValue > 0 && selectedValue.Equals(project.Id)
});
}
return _projects;
}
}
View: 视图:
@using Project.DataAccess.DataModels
@model List<TimeReport>
@{
ViewBag.Title = "TimeSheet";
Layout = "~/Views/_Layout.cshtml";
int index = 0; // i use this variables to manage collections with binder
int index2 = 0;
}
@using (Html.BeginForm())
{
foreach (TimeReport t in Model)
{
//
foreach (TimeEntry te in t.TimeEntries)
{
//
@Html.DropDownListFor(model => model[index].TimeEntries[index2].ProjectId,
(IEnumerable<SelectListItem>)ViewBag.Projects)
//
index2++;
}
//
index++;
}
<input type="submit" value="Submit" />
}
Also in firebug i see: 在萤火虫中我也看到:
<select name="[0].TimeEntries[0].ProjectId">
<option selected="selected" value="0">Project...</option>
<option value="1">First Project</option>
<option value="2">Second Project</option>
</select>
Well, it looks like you are calling your "GetProjects" function with a parameter of "0"... so it will always select that first SelectItem. 好吧,看来您正在使用参数“ 0”调用“ GetProjects”函数...因此它将始终选择该第一个SelectItem。
ViewBag.Projects = h.GetProjects(0);
Hope that helps! 希望有帮助!
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.