MVC :: How To Bind DropDownListFor Within Table Rows
Aug 3, 2010
I have a table, and each row has a column where its data is actually a select list. I want the user to be able to select a drop down item, and when they POST, it saves the Id of the selected item. Is this possible?
I'm trying to model a "Room" each room has a number of Jacks, there are 2 types of Jacks (Data/Voice) - this is the select list.
[Code]....
Something like this does not work. I created a stub in my view model
[Code]....
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I don't know how to retrieve a DropDownListFor value on form post and how to validate it.
This is my scenario:
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[Code]....
Model:
[Code]....
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[Code]....
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I have the following code:
[Code]....
However, the wrong option is selected, and when I view page source, it renders like this:
[Code]....
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[code]...
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Feb 20, 2011
I am trying to populate a drop down list from my controller for a create action. I can display the dropdown as I want but when I cannot get the value to be stored in the database. My models:
[Code]....
Controller: [Code]....
View: [Code]....
This above snippet will show me the message "The value '50117dae-a7d7-4371-926f-7b1f7aaec133' is invalid."
if I change the line to @Html.DropDownListFor(ct => ct.CollectionType.CollectionTypeId, new SelectList(ViewBag.CollectionTypes as System.Collections.IEnumerable, "CollectionTypeId", "Title"))
@Html.ValidationMessageFor(model => model.CollectionType)
the page will not do anything - I believe this could be because the controller is trying to add a new CollectionType.
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Jan 26, 2011
Learning about dropdown lists, Im trying to add a RSVP create page for nerddinner as in Scott Gu's blog with a Html.DropDownListFor listing available dinners. I can get the dropdown list populated but I cannot get the dropdown to pre select the value ("Sample Dinner 2") I want. Im using an initilizer to seed a few dinner objects in the db. The database is sql ce 4 using a EF 'code first approach'. Sorry I know this is a v common problem and hate to ask, but honestly have spent quite some time on this but cant get it to work:
ViewModel
public class RSVPViewModel
{
public SelectList DinnersList { get; set; }
public RSVP Rsvp { get; set; }
public string SelectedItem { get; set; }
}
[code]...
So is not preselecting the dropdownlist with the value "Sample Dinner 2" when the page loads. The list displays ok and sets the correct DinnerID when I make a selection and click Submit.Tries this also:
@Html.DropDownListFor(x => x.SelectedItem, Model.DinnersList)
but doesnt set or bind to Rsvp.DinnerID.This preselects from the list but doesnt bind (or set Rsvp.DinnerID)
@Html.DropDownList("DinnersList")
I want to keep it mvc3 so want to implement with strong type using ViewModel approach (no ViewData) and preferably using Html.DropDownListFor (not Html.DropDownList).Viewbag seems unnecessary for this case.Thinking I should be using a selectList of selectListItems I tried this verbose approach :
RSVP rsvp = new RSVP();
string selected = "2";
List<SelectListItem> dinners = new List<SelectListItem>();
foreach (Dinner dinner in dbc.Dinners.ToList())
{
SelectListItem slDinner = new SelectListItem();
slDinner.Value = dinner.DinnerID.ToString();
slDinner.Text = dinner.Title;
slDinner.Selected = (slDinner.Value == selected);
dinners.Add(slDinner);
}
var dinnersList = new SelectList(dinners, "Value", "Text", selected);
var viewModel = new RSVPViewModel { DinnersList = dinnersList, Rsvp = rsvp, SelectedItem = selected };
However still no work. Should I be making use of the ViewModel SelectedItem property in: @Html.DropDownListFor.. somehow? Something like :@Html.DropDownListFor(x => x.SelectedItem, Model.DinnersList)but how to I get a selected value to set Rsvp.DinnerID. I think thats called binding.
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[Code]....
How can I reset this default size?
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Recently i have come across one question in sql query
Question: Which SQL Query helps to view the TOP N rows From the particular SQL table?
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