I am trying to populate a dropdown control in ASP.NET MVC. I have a table named City and i am getting the records from this table to populate through entity data. I have used the ViewBag to add dynamically. However it throws a compilation error.
Code
- View
<h4>City through db</h4>
#Html.DropDownList(cities, "Select City");
Controller
public class HomeController : Controller
{
// GET: Home
public ActionResult Index()
{
ActionFilterdbEntities db = new ActionFilterdbEntities();
var cities = db.Cities;
ViewBag.cities = new SelectList(cities, "Id", "CityName");
return View();
}
}
Model
[Table("City")]
public class clCity
{
public int Id { get; set; }
public string CityName { get; set; }
}
}
Db
CREATE TABLE [dbo].[City] (
[Id] INT NOT NULL,
[CityName] NVARCHAR (50) NOT NULL,
PRIMARY KEY CLUSTERED ([Id] ASC)
);
You have to construct the dropdown like this:
#Html.DropDownList("nameOfTheField", (SelectList)ViewBag.cities, "Select city");
If you are putting this dropdown in a form and lets suppose you have a model like this:
public class SearchModel
{
public int CityId { get; set; }
//etc
}
then you would set the code like below:
#Html.DropDownList("CityId", (SelectList)ViewBag.cities, "Select city");
Your View should look like:
<h4>City through db</h4>
#Html.DropDownList("YourInputId", (SelectList)ViewBag.cities, "Select City")
First argument is a string that will renter as id and name attributes of select tag.
How about like this,
#{
SelectList cities = ViewBag.cities;
}
#Html.DropDownList("YourDropDownId", cities, "Select City")
#Html.DropDownList("cities", ViewBag.cities as SelectList,"Select City")
please use above code.
Related
I am calling a partial view on which I want to collapse a few dropdown controls(previously created by using DropDownListFor). Because the controls are readonly, I just need to show the selected value on each control. I have created a list called "salutations" in the controller, and pass it as ViewData to my partial view. On the partial view I need to see the selected salutation (e.g.. Mr/Miss/Dr)in my div using #Html.DisplayFor. I tried creating a DisplayTemplate according to an online posting, but I am still having issues getting this to work.
Lookup list declared like this in controller:
var salutations = (IEnumerable<lu_Salutation>)ViewData["salutations"];
Here's my DisplayTemplate named LookupList.cshtml:
#model int
#using System.Linq
#vEmployee.SelectList1.Single(s => s.Value == Model.ToString()).Text
Of course, there's something wrong with the last line of the above code. vEmployee is the name of my model. How do I correct it?, and can I have a generic display template like the GridForeignKey Kendo EditorTemplate so I could easily pass the foreign key, the DisplayTemplate, and the lookup list to get just the text of the selected lookup value displayed?
Ideally, I will just like to have in my partial view, something like:
#Html.DisplayFor(model => model.id, "LookupList", SelectList((IEnumerable)ViewData["salutationList"], "TitleID", "Title"))
where TitleID and Title are respectively the value and text in the lookup list.
Models
public class lu_Salutation
{
public int TitleID { get; set; } // e.g. 1
public string Title { get; set; } // e.g. Mrs
}
ViewModel Class - I want to use just IDs here, but display the matching Texts from the lookup tables (e.g lu_Salutation) when needed
public class vEmployee
{
[Key]
public int EmployeeID { get; set; }
public int SalutationID { get; set; }
}
Controller
[HttpGet]
public ActionResult EmployeeDetails(int employeeID)
{
vEmployee SelectedEmployee = GetEmployees(employeeID).First();
ViewData["salutations"] = _db.lu_Salutation.OrderBy(e => e.Title);
return PartialView("_EmployeeDetails", SelectedEmployee);
}
private IEnumerable<vEmployee>GetEmployees(int employeeID)
{
IEnumerable<vEmployee> emp = (from e in _db.Employees
join c in _db.Contacts on e.EmployeeID equals c.EmployeeID
join u in _db.lu_Salutation on c.SalutationID equals u.TitleID into sal
from u in sal.DefaultIfEmpty()
where (e.EmployeeID == employeeID))
select new vEmployee
{
EmployeeID = e.EmployeeID,
SalutationID = c.SalutationID
}).AsEnumerable().OrderBy(m => m.EmployeeNumber).ThenBy(m => m.FirstName);
return emp;
}
I'm trying to use the results of a LINQ query to create a dropdownlist in an MVC app. I'm using this answer as a reference. However, when I try to implement for my case I get the error: 'System.String' does not contain a property with the name 'SAMPLING_EVENT'
My code is as follows:
Controller
public class HomeController : Controller
{
//
// GET: /Home/
public ActionResult Index()
{
ViewBag.Title = "Sample Tracker Tool";
DateTime nineMonthsAgo = DateTime.Now.AddDays(-270);
var context = new EDMS_Entities();
var resultSet = (from samplingEvents in context.EDMS_SAMPLES
where samplingEvents.RECORD_CREATED_DATE >= nineMonthsAgo
orderby samplingEvents.SAMPLING_EVENT
select samplingEvents.SAMPLE_ID)
.Distinct();
var viewModel = new SamplingEventsVM();
viewModel.SamplingEvents = new SelectList(resultSet, "SAMPLING_EVENT", "SAMPLING_EVENT");
return View(viewModel);
}
}
ViewModel class
public class SamplingEventsVM
{
public int SelectedSamplingEvent { get; set; }
public SelectList SamplingEvents { get; set; }
}
View
#model SamplingEventsVM
<h2>#ViewBag.Title</h2>
<span>
#Html.DropDownListFor(model => model.SelectedSamplingEvent, Model.SamplingEvents, "Sampling Event")
</span>
What am I doing wrong?
You are selecting this select samplingEvents.SAMPLE_ID
So you get a List of int maybe, depends on your ID type
Then you try to make a select list with the property value "SAMPLING_EVENT"
Which doesn't exist on the int object you filled resultSet with.
Instead do this:
var resultSet = (from samplingEvents in context.EDMS_SAMPLES
where samplingEvents.RECORD_CREATED_DATE >= nineMonthsAgo
orderby samplingEvents.SAMPLING_EVENT
select samplingEvents)
.Distinct();
I have a table where I store all the different code/value keywords that I need in my app:
public class Keyword
{
public int id { get; set;}
public string name { get; set; }
public string valuecode { get; set; }
public string valuename { get; set; }
}
Then I use Keyword to store records like these
name valuecode valuename
.DealState 1 Draft
.DealState 2 Final
.DealState 3 Cancelled
.DealType NEW New Business
.DealType RNW Renewal
.DealType WFA Waiting for approval
Then in other models I have fields that are filled using these keywords. For example,
public class Deal
{
....
public string state { get; set; }
public string type { get; set; }
....
}
I have managed to have the fields filled with "valuecode" while displaying "valuename" in Create and Edit views (I use DropDownList with a SelectList built in the controller), but I cannot find a way to display valuename instead of valuecode in Index and Details views.
I'm trying to pass the same SelectList in the ViewBag for Index, but then I do not know which syntax to use in order to replace the "state" code with the state "description" for each record returned.
Any hint?
PS: I'm quite new to .net and mvc, usually work with RoR and ActiveRecord...
EDIT
In my KeywordController I have a method
public SelectList selectKeywordValues(string kwname, object selectedKeyword = null)
{
var keywordsQuery = from d in db.Keywords
where d.name == kwname
orderby d.valuename
select d;
SelectList kwlist = new SelectList(keywordsQuery, "valuecode", "valuename", selectedKeyword);
return kwlist;
}
Then in my DealController i have the index method
public ActionResult Index()
{
var kw = new KeywordController();
ViewBag.state = kw.selectKeywordValues(".DealState");
return View(db.Deals.ToList());
}
SOLVED
In DealController the index method is the following
public ActionResult Index()
{
var kw = new KeywordController();
SelectList states = kw.selectKeywordValues(".DealState");
SelectList types = kw.selectKeywordValues(".DealType");
foreach (var item in db.Deals.ToList())
{
SelectListItem mystate = states.Where(row => row.Value == item.state).ElementAt(0);
SelectListItem mytype = types.Where(row => row.Value == item.type).ElementAt(0);
item.state = mystate.Text;
item.type = mytype.Text;
}
return View(db.Deals.ToList());
}
Now the db.Deals.ToList() is filled with descriptions and not with codes.
You can define a view model called DealViewModel that contains DealState and DealType properties. Then populate the DealViewModel with joins in LINQ before passing to the views that reference the view model.
Another approach is to use enums in EF5.
ASP.Net MVC 4
I am trying to populate a list of Countries (data from Country table in DB) in a dropdownlist. I get the following error:
The model item passed into the dictionary is of type
System.Collections.Generic.List`1[System.Int32]', but this dictionary requires a model item of type 'BIReport.Models.Country'.
I am new to ASP.Net MVC and I don't understand that error. What I feel is what Index method is returning doesn't match with the model that I am using in the View.
Model::
namespace BIReport.Models
{
public partial class Country
{
public int Country_ID { get; set; }
public string Country_Name { get; set; }
public string Country_Code { get; set; }
public string Country_Acronym { get; set; }
}
}
Controller::
public class HomeController : Controller
{
private CorpCostEntities _context;
public HomeController()
{
_context = new CorpCostEntities();
}
//
// GET: /Home/
public ActionResult Index()
{
var countries = _context.Countries.Select(arg => arg.Country_ID).ToList();
ViewData["Country_ID"] = new SelectList(countries);
return View(countries);
}
}
View::
#model BIReport.Models.Country
<label>
Country #Html.DropDownListFor(model => model.Country_ID, ViewData["Country_ID"] as SelectList)
</label>
Where am I going wrong?
You are selecting CountryIDs, therefore you will have a list of integers passed into the view.
I think you really want something like this:
public ActionResult Index()
{
var countries = _context.Countries.ToList();
ViewData["Country_ID"] = new SelectList(countries, "Country_ID", "Country_Name");
return View();
}
I'm not really sure why you have single country as a model for your view.
Update:
I'm still not sure why the model is a country, if you are just going to post the ID of the selected country you don't necessarily need a model at all (or just have an integer). This will be just fine though:
View
#model MvcApplication1.Models.Country
#Html.DropDownListFor(m => m.Country_ID, ViewData["Country_ID"] as SelectList)
the problem is in line 1 of your view. change it like this :
#model IEnumerable<BIReport.Models.Country>
also there is no need to pass the model to view if you already did it by :
ViewData["Country_ID"] = new SelectList(countries);
When you say #model BIReport.Models.Country it means your view is expecting a model consisting single country details. On the contrary you need a list of countries to be displayed in the drop-down list. Hence you should tell the view to look for a list of country details instead.
Therefore #model IEnumerable.
I have an mvc 3 application with 2 tables in my entity framework.
PurchaseTable which was PurchaseID,PurchaseDate & ProductID I have another table called Product which contains ProductID and ProductName. creating a new view to insert a new purchase how do I change the textbox in the view for ProductID to be a dropdown bound by the ProductName in the Product table?
Create a ViewModel:
public class CreatePurchaseViewModel
{
public Purchase Purchase { get; set; }
public IEnumerable<SelectListItem> Products { get; set; }
public int SelectedProductId { get; set; }
}
Setup the View with the ViewModel:
[HttpGet]
public ActionResult CreateProduct()
{
var model = new CreatePurchaseViewModel
{
Products = repository.FindAllProducts().Select(x =>
new SelectListItem
{
Text = x.ProductName,
Value = x.ProductId
}
};
return View(model);
}
Then simply bind to the ViewModel and use the DropDownListFor HTML Helper:
<! -- other code to bind to Purchase, and then: -->
<%= Html.DropDownListFor(x => x.SelectedProductId, Model.Products) %>
Then when you submit the form, the SelectedProductId value in the model will be populated with the selected value from the dropdown list.
The answer is easier than it looks. Simply create a list:
myDropDown = new SelectList(db.Products, "Product_ID", "ProductName", idSelected);
The first parameter is your table ("Products" from the Entity Model), the second is the "id" that will be returned when selecting from the list (i.e SelectedValue), the third is the "text" that will be displayed in the list and the last parameter is the currently selected item.
Assuming your model is called MyTablesDB, then:
MyTablesDB db = new MyTablesDB();
For example:
public SelectList GetPullDown(object idSelected) {
myTablesDB myDB = new MyTablesDB();
return new SelectList(myDB.Products, "Product_ID", "Product_Name", idSelected);
}
Cheers,