Incremental Sequencing DropDownListFor Binding?
I am using incremental sequencing for a collection of objects in a form. All works fine and dandy except when I need to use DropDownListFor. Lots of questions concerning binding a dropdown and selecting the correct value, which is working fine in my case. However I am unclear on what is supposed to have on the HttpPost action in my controller. Here is my code:
Model
public class WorkRequestList
{
public WorkRequest[] Requests { get; set; }
public Vehicle[] Vehicles { get; set; }
}
View
<% using (Html.Begin开发者_如何学运维Form()) {%>
<% for (var i = 0; i < Model.Requests.Count(); i++) { %>
<%=Html.DropDownListFor(x => x.Requests[i].AssignedTo,new SelectList(Model.Vehicles,"Id","Name",Model.Requests[i].AssignedTo.Id)) %>
<%}%>
<%=Html.SubmitButton("TopSubmit","Submit") %>
<%}%>
Posted Action
[HttpPost]
public ActionResult Schedule(WorkRequestList form)
{
//what goes here?
}
The dropdown lists get populated just fine, they get pre-selected just fine. But on post back form.Requests.AssignedTo is null. I'm assuming the Vehicle Id is being posted back somewhere, but how do I get to that without resorting looping through the Request
magic strings:
var id = Request["Requests[" + i + "].AssignedTo"];
Here is an alternate approach, as I could not get sub objects bound either without an explicit modelbinder:
define a new class for your response:
public class WorkRequestResponse
{
public int AssignedTo { get; set; }
}
On the page change it as follows: (I changed request to WorkRequest)
<% for (var i = 0; i < Model.WorkRequest.Count(); i++)
{ %>
<%=Html.DropDownListFor(x => x.WorkRequest[i].AssignedTo, new SelectList(Model.Vehicles, "Id", "Name", Model.WorkRequest[i].AssignedTo.Id))%>
<%}%>
On your controller bind as follows:
public ActionResult Index([Bind(Prefix = "WorkRequest")]List<WorkRequestResponse> AssignedTo)
{
// AssignedTo is now populated
WorkRequestList.WorkRequests = magic_assign_function(AssignedTo);
// manual model validation etc....
}
I would be keen to see if there is a more direct route, as this has plagued me too.
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