I have a List object in 1 controller and I was wondering how can I transfer it to the next controller for example this is what I have
public ActionResult namelist()
{
var mynames = new List<everyname>
{
new everyname{ firstname ="john", Lastname= "henny"},
new everyname{ firstname = "bob", Lastname = "cosso"},
new everyname{ firstname = "bill", Lastname = "luther"},
new everyname{ firstname ="mike", Lastname= "jones"}
};
return View(mynames);
}
// how can i transfer the above list with information into this action below
public ActionResult newlist()
{
// i tried transfering the list here and it did not work
var namelist = new namelist()
IEnumerable<SelectListItem> items = namelist.Select(c => new SelectListItem
{
Value = namelist,
Text = namelist
});
how can i transfer things? i am lost on this.
In the NameList method you can add this line:
TempData["namelist"] = mynames;
then at the top of the newList method add this line:
var namelist = Tempdata["namelist"] as List<everyname>;
Once you access a value in TempData it is purged from the TempData object
Related
I have a MVC3 Razor form. It have a radiobutton list and some another text fields. When I press submit controller post action get the view model, which have all fields seted correctly, except RegionID.
Model:
namespace SSHS.Models.RecorderModels
{
public class CreateViewModel
{
...
public int RegionID { get; set; }
...
}
}
Controller:
namespace SSHS.Controllers
{
public class RecorderController : Controller
{
...
public ActionResult Create()
{
EntrantDBEntities db = new EntrantDBEntities();
List Regions = new List(db.Region);
List Schools = new List(db.School);
List Settlements = new List(db.settlement);
CreateViewModel newEntr = new CreateViewModel();
ViewBag.Regions = Regions;
ViewBag.Schools = Schools;
ViewBag.Settlements = Settlements;
return View(newEntr);
}
[HttpPost]
public ActionResult Create(CreateViewModel m)
{
EntrantDBEntities db = new EntrantDBEntities();
Entrant e = new Entrant()
{
FatherName = m.FatherName,
Lastname = m.LastName,
LocalAddress = m.LocalAddress,
Name = m.Name,
RegionID = m.RegionID,
PassportID = m.PassportID,
SchoolID = m.SchoolID,
SettlementID = m.SattlementID,
TaxID = m.TaxID,
};
db.Entrant.AddObject(e);
db.SaveChanges();
return RedirectToAction("Index");
}
}
View:
#model SSHS.Models.RecorderModels.CreateViewModel
#using SSHS.Models
#using (Html.BeginForm("Create", "Recorder", FormMethod.Post))
{
#foreach (Region item in ViewBag.Regions)
{
#Html.RadioButtonFor(m => m.RegionID, item.RegionID)
#Html.Label(item.RegionName) - #item.RegionID
}
...
...
}
The Create(CreateViewModel m) method gets data from all textboxes normaly, but RegionID always is 0.
How are you planning to fill radio button with int ? It have two states: checked and not. Could you tell us, what are you trying to do? Make radio group? Use bool for RadioButtonFor.
Added:
You need to write something like this: CheckboxList in MVC3.0 (in your example you will have radio buttons)
I'm trying to adapt the answers for filling a ListBoxFor that has preselected values that I've found here on SO and am having some trouble with the adaptation.
This is one of the questions I've been referring to: here
Here is my class that defines a list object
public class SelectListDTO {
public int ID { get; set; }
public string Name { get; set; }
}
I have a method on a class that fills a List of SelectListDTO items. The CheckRefresh checks to see if the cache is expired, if so it refills the cache. So this method gets my list:
private List<SelectListDTO> GetSelectList() {
CheckRefresh();
var lst = new List<SelectListDTO>(_cache.Count + 1);
_cache.ForEach(item => lst.Add(new SelectListDTO { ID = item.ID, Name = item.Name }));
return lst;
}
My Model is define with these Properties/Methods:
public class MyModel {
[Required]
[Display(Name = "Program Type")]
[Min(1, ErrorMessage = "Please select a Program Type")]
public int[] SelectedProgramTypes { get; set; }
public MultiSelectList ProgramTypes { get; set; }
public MyModel() {
PopulateProgramTypeList();
}
private void PopulateProgramTypeList() {
// Get all available list items
var programTypes = ProgramTypeService.Instance.GetSelectList;
// how to fill multiselectlist with my List<SelectListDTO> items;
ProgramTypes = new MultiSelectList(??)
}
}
1st part of question is from above here^ How to fill the MultiSlectList with my List of SelectListDTO objects
Also in my controller action I am getting the saved items from the DB and will need to pass them to the model as SelectedProgramTypes. This is currently in my action:
public ActionResult Edit(int? id) {
// Code here to validate id and that user is associated with id
lenderProduct = new LenderProduct(id);
var model = BuildModel(lenderProduct); // returns instance or MyModel
var selectedProgramTypes = lenderProduct.ProgramTypes;
foreach (var item in selectedProgramTypes) {
/// How to fill the Model.SelectedProgramTypes array
}
return View(model);
}
2nd part of question is how to get the currently selected items that I read from the DB into the array that can be used by the MultiSelectList in the Model
I feel like I'm this close but am missing some pattern or hopefully just the correct syntax into getting this to work in this way as opposed to the ways I've seen posted here.
I haven't made it to the View yet but from what I've seen that is just as easy as filling a normal DropDownList.
1st part of question is from above here^ How to fill the
MultiSlectList with my List of SelectListDTO objects
ProgramTypes = new MultiSelectList(programTypes.Select(x => new SelectListItem
{
Value = x.ID.ToString(),
Text = x.Name
}));
2nd part of question is how to get the currently selected items that I
read from the DB into the array that can be used by the
MultiSelectList in the Model
It's not clear how your LenderProduct class looks like but assuming the ProgramTypes property is just an array of integers you could directly assign it to your view model:
public ActionResult Edit(int? id)
{
// Code here to validate id and that user is associated with id
var lenderProduct = new LenderProduct(id);
var model = BuildModel(lenderProduct); // returns instance or MyModel
model.SelectedProgramTypes = lenderProduct.ProgramTypes;
return View(model);
}
and if it is an array of some complex object you could select the corresponding property that contains the id:
public ActionResult Edit(int? id)
{
// Code here to validate id and that user is associated with id
var lenderProduct = new LenderProduct(id);
var model = BuildModel(lenderProduct); // returns instance or MyModel
model.SelectedProgramTypes = lenderProduct.ProgramTypes.Select(x => x.ID).ToArray();
return View(model);
}
I have follwoing code
#Html.DropDownList("optionsforuser", new SelectList(new[] { "Option1", "Option2", "Option3" }), "Select")
Is there anyway to initialize a value of 100 for Option1, 200 for Option2, 250 for Option3 etc within SelectList?
Try using this Extension:
#Html.DropDownList("optionsforuser",
new SelectList(new Dictionary<string, int>
{
{"Option1", 100},
{"Option2", 200},
{"Option3", 250}
},
"Value", "Key")
)
and pass it a Dictionary<string, int> with the dataValueField and dataTextField populated with your values and text
SelectExtensions.DropDownList Method (HtmlHelper, String, IEnumerable(Of SelectListItem))
public static MvcHtmlString DropDownList(
this HtmlHelper htmlHelper,
string name,
IEnumerable<SelectListItem> selectList
)
SelectList Constructor (IEnumerable, String, String)
public SelectList(
IEnumerable items,
string dataValueField,
string dataTextField
)
For situations where I just want to hard-code select list items (i.e. not get them from some pre-defined collection), I use this handy little class:
public class BetterSelectList : List<SelectListItem>
{
public void Add(string text, object value, bool selected = false) {
this.Add(new SelectListItem {
Text = text,
Value = value.ToString(),
Selected = selected
});
}
}
Why is it "better"? It implements IEnumerable and has a multi-parameter Add method, which is all you need for the C# compiler to allow you to use dictionary-style initializers, resulting in about the most noise-free initialization possible:
var optionsForUser = new BetterSelectList {
{ "Option1", 100, true },
{ "Option2", 200 },
{ "Option3", 250 }
};
Yes you set text and value
var selections = new List<SelectListItem>();
selections.Add(new SelectListItem() { Text = "Option1", Value = "100" });
selections.Add(new SelectListItem() { Text = "Option2", Value ="200" });
Here is an MSDN article on select lists: select list
You can do it in your view like that as the others have posted, but can't you do it in the controller instead?
For example, In your view model:
public class ViewModel()
{
public List<SelectListItem> OptionsForUser{ get; set; }
}
In your controller:
var optionsForUser = new List<SelectListItem>();
optionsForUser.Add(new SelectListItem { Text = "Option1", Value = "100"});
optionsForUser.Add(new SelectListItem { Text = "Option2", Value = "200"});
optionsForUser.Add(new SelectListItem { Text = "Option3", Value = "250"});
var viewmodel = new ViewModel();
viewmodel.OptionsForUser = optionsForUser;
return view(viewmodel);
then in your view:
#Html.DropDownList("optionsforuser", Model.OptionsForUser);
Those other solutions will work too, I just think its not very "clean" to initialise your dropdown list in your view like that. But its probably a matter of taste
I am calling a project (WCF, but that shouldn't matter) that consumes a IList , with MVC 3 (which really should not matter either obviously) I want to convert a single column List of strings (IList which is just a list of Countries) into a List
Hard Coded list I have done like this and they work fine:
public List<SelectListItem> mothermarriedatdelivery = new List<SelectListItem>();
mothermarriedatdelivery.Add(new SelectListItem() { Text = "Yes", Value = "1" });
However, now I am trying to convert this code:
public List<SelectListItem> BirthPlace { get; set; }
BirthPlace = new List<SelectListItem>();
GetHomeRepository repo = new GetHomeRepository();
BirthPlace = repo.GetCountries();
I need to implicitly convert from the List to SelectListItem, anyone do this? Yes.. I have search and found several examples, but none that really fit my specific need.
You can use LINQ as such:
BirthPlace = repo.GetCountries()
.Select(x => new SelectListItem { Text = x, Value = x })
.ToList();
Or I think you can just use one of SelectList's constructors:
public SelectList BirthPlace { get; set; }
BirthPlace = new SelectList(repo.GetCountries());
In Controller ,
var result = proxy.GetAllLocations();
ViewBag.Area = result.Where(p => p.ParentId == null).Select(p => new SelectListItem { Text = p.LocationName, Value = p.LocationId.ToString() }).ToList();
ViewBag.Locations = result.Where(p => p.ParentId != null).Select(p => new SelectListItem { Text = p.LocationName, Value = p.LocationId.ToString() }).ToList();
return View();
In View ,
#Html.DropDownList("LocationName", ViewData["Area"] as IEnumerable<SelectListItem>)
Hi so I'm pretty new to MVC3 and Razor and I've been trying to get my head around it the past few days. I've been given a task by my project architect to create a helper method that sorts a drop down list in an MVC View. I have a View that retrieves various data from a Controller and I'm returning some values that I want to appear in a drop down list. I've been told not to sort it in the Controller and also to pass the field that we want to sort by into the helper method. I could do it like below but the architect wants to keep the view free of c sharp code:
#Html.DropDownListFor(model => model.StudyName, new SelectList(ViewBag.StudyTypes, "Value", "Text").OrderBy(l => l.Text))
So I've created some sample code and some extension methods to try and get it to work. My idea is to replicate the existing Html.DropDownList method and allow the passing of 'object htmlAttributes' so I can set the style as part of the method call.
Here's my code so far. I'm returning the data for the drop down in ViewBag.StudyTypes in the Edit Controller method:
public ActionResult Edit(int id)
{
IEnumerable<SelectListItem> mySelectList = new List<SelectListItem>();
IList<SelectListItem> myList = new List<SelectListItem>();
for (int i = 0; i < 5; i++)
{
myList.Add(new SelectListItem()
{ Value = i.ToString(), Text = "My Item " + i.ToString(), Selected = i == 2 }
);
}
mySelectList = myList;
ViewBag.StudyTypes = mySelectList;
StudyDefinition studydefinition = db.StudyDefinitions.Find(id);
return View(studydefinition);
}
Here's my View code:
#model MyStudyWeb.Models.StudyDefinition
#using MyStudyWeb.Helpers
#{
ViewBag.Mode = "Edit";
}
<div>
#Html.DropDownListSorted(new SelectList(ViewBag.StudyTypes, "Value", "Text"))<br />
#Html.DropDownListSorted("MyList", new SelectList(ViewBag.StudyTypes, "Value", "Text"))<br />
</div>
Finally below are the extension methods I'm trying to get to work. The first extension method does nothing, I just get a blank space at that point in the View. The second method kind of works but it's ugly. For the 3rd method I don't know how to specify an 'order by' parameter as the OrderBy on an IEnumerable expects a Linq expression.
namespace StudyDefinition.Helpers
{
public static class HtmlHelperExtensions
{
// 1st sort method: sort the passed in list and return a new sorted list
public static SelectList DropDownListSorted(this HtmlHelper helper, IEnumerable<SelectListItem> selectList)
{
var x = new SelectList(selectList.ToList()).OrderBy(l => l.Text);
return x as SelectList;
}
// 2nd sort method: return IHtml string and create <select> list manually
public static IHtmlString DropDownListSorted(this HtmlHelper helper, string name, SelectList selectList)
{
StringBuilder output = new StringBuilder();
(selectList).OrderBy(l => l.Text);
output.Append("<select id=" + name + " name=" + name + ">");
foreach (var item in selectList)
{
output.Append("<option value=" + item.Value.ToString() + ">" + item.Text + "</option>");
}
output.Append("</select>");
return MvcHtmlString.Create(output.ToString());
}
// 3rd sort method: pass in order by parameter - how do I use this?
public static IHtmlString DropDownListSorted(this HtmlHelper helper, string name, SelectList selectList, string orderBy)
{
StringBuilder output = new StringBuilder();
//How do I use the orderBy parameter?
(selectList).OrderBy(l => l.Text);
output.Append("<select id=" + name + " name=" + name + ">");
foreach (var item in selectList)
{
output.Append("<option value=" + item.Value.ToString() + ">" + item.Text + "</option>");
}
output.Append("</select>");
return MvcHtmlString.Create(output.ToString());
}
}
}
I really don't know the best approach to take, there may be a much simpler way that I'm totally missing and I might be at the point where I can't see the wood for the trees anymore. Some questions
Should I return a SelectList or an MvcHtmlString, or something else entirely?
For the first extension method how do I get the returned SelectList to render in the View?
How to I pass in a parameter to my extension methods that specifies the sort order?
How do I pass an 'object htmlAttributes' parameter, and how do I apply this object / parameter to the SelectList?
If anyone has some ideas or suggestions then I'd appreciate some feedback :)
The first and most important part of your code would be to get rid of any ViewBag/ViewData (which I personally consider as cancer for MVC applications) and use view models and strongly typed views.
So let's start by defining a view model which would represent the data our view will be working with (a dropdownlistg in this example):
public class MyViewModel
{
public string SelectedItem { get; set; }
public IEnumerable<SelectListItem> Items { get; set; }
}
then we could have a controller:
public class HomeController : Controller
{
public ActionResult Index()
{
var model = new MyViewModel
{
// I am explicitly putting some items out of order
Items = new[]
{
new SelectListItem { Value = "5", Text = "Item 5" },
new SelectListItem { Value = "1", Text = "Item 1" },
new SelectListItem { Value = "3", Text = "Item 3" },
new SelectListItem { Value = "4", Text = "Item 4" },
}
};
return View(model);
}
}
and a view:
#model MyViewModel
#Html.DropDownListForSorted(
x => x.SelectedItem,
Model.Items,
new { #class = "foo" }
)
and finally the last piece is the helper method which will sort the dropdown by value (you could adapt it to sort by text):
public static class HtmlExtensions
{
public static IHtmlString DropDownListForSorted<TModel, TProperty>(
this HtmlHelper<TModel> helper,
Expression<Func<TModel, TProperty>> expression,
IEnumerable<SelectListItem> items,
object htmlAttributes
)
{
var model = helper.ViewData.Model;
var orderedItems = items.OrderBy(x => x.Value);
return helper.DropDownListFor(
expression,
new SelectList(orderedItems, "Value", "Text"),
htmlAttributes
);
}
}
Just add in the sorting before you return the items to the dropdown list.
Do this:
Models: StudyViewModel.cs
public class StudyViewModel {
public string StudyName { get; set; }
public string StudyTypes { get; set; }
}
Controller: StudyController.cs
using System.Web.Mvc;
public class StudyController
{
public List<SelectListItem> studyTypes()
{
List<SelectListItem> itemList = new List<SelectListItem>();
for (var i=0; i<5; i++)
{
itemList.Add = new SelectListItem({
Value = i.ToString();
Text = "My Item";
});
}
// You can sort here....
List<SelectListItem> sortedList = itemList.OrderBy(x=>x.Text);
return sortedList;
}
public ActionResult Edit(int id)
{
//You won't need this because you get it using your
//controller's routine, instead
//ViewBag.StudyTypes = studySlots.OrderBy(e => e.Value);
//-- unless you need to add these values to the model for
// some reason (outside of filling the ddl), in which case....
// StudyViewModel svm = new StudyViewModel();
// svm.StudyTypes = studySlots.OrderBy(e => e.Value);
// svm.StudyName = "My Item";
// return View(svm);
// Otherwise, just....
return View();
}
}
View: Edit.cshtml
#Html.DropDownListFor(model => model.StudyName)
.OptionLabel('Select...')
.DataTextField('Text')
.DataValueField('Value')
.Datasource(source =>
{
// This is where you populate your data from the controller
source.Read(read =>
{
read.Action("studyTypes", "Study");
});
})
.Value(Model.StudyName != null ? Model.StudyName.ToString() : "")
)
This way will avoid ViewBags and just use a function to fill in the values, directly.
If you are using a database you can use a query to define the sort element
using (BDMMContext dataContext = new BDMMContext())
{
foreach (Arquiteto arq in dataContext.Arquitetos.SqlQuery("SELECT * FROM Arquitetos ORDER BY Nome"))
{
SelectListItem selectItem = new SelectListItem { Text = arq.Nome, Value = arq.Arquiteto_Id.ToString() };
//
list.Add(selectItem);
}
}