How Should I get list of year that generate on basis of current year to next 21 year plus
On controller side I am trying as to get year and passing that model on view side
public IList<SelectListItem> GetYear()
{
var Year= "";
//Hear I want to bind the year in for loop for next years like Current year to next 21 year
// Some thing like for loop over year
return Year;
}
public ActionResult PaymentInformation(FormCollection fill)
{
if (User.Identity.IsAuthenticated)
{
int StudentRequestId = 0;
string CurrentURL = "";
foreach (var key in fill.AllKeys)
{
StudentRequestId = Convert.ToInt32(fill["hdstatusstudentrequestid"]);
CurrentURL = Convert.ToString(fill["hdCurrenturl"]);
}
ViewBag.StudentRequestId = StudentRequestId;
ViewBag.CurrentURL = CurrentURL;
var Year = GetYear();
var model = new PaymentInformation { AvailableYear = Year };
return View(model);
}
else
{
return RedirectToAction("Index", "Home");
}
}
And my model side is I have created list item to get list of year
public PaymentInformation()
{
AvailableYear = new List<SelectListItem>();
}
On view side I have written code to bind the year getting from AvailableYear
#Html.DropDownListFor(model => model.Year, Model.AvailableYear, new { #class = "form-control" })
How can I bind list of year from controller and show it on my above View side?
Add a for loop which adds 21 items to the SelectListItem list, one for each year from current year
public IList<SelectListItem> GetYear()
{
const int numberOfYears = 21;
var startYear = DateTime.Now.Year;
var endYear = startYear + numberOfYears;
var yearList = new List<SelectListItem>();
for (var i = startYear; i < endYear ; i++)
{
yearList.Add(new SelectListItem() { Value = i.ToString(), Text = i.ToString() });
}
return yearList;
}
Update the < to <= if you want the n (ex:21) years to start from next year vs current year as needed.
Also, if you are having a view model, why using the dynamic ViewBag to transfer data ? Add the StudentRequestId and CurrentURL properties to your view model (PaymentInformation) and use that.
You can change the code of GetYear method as follows.
public IList<SelectListItem> GetYear()
{
var startYear = DateTime.Now.Year;
var yearList = new List<SelectListItem>();
for (var i = DateTime.Today.Year; i < DateTime.Today.Year + 21; i++)
{
yearList.Add(new SelectListItem { Value = i, Text = i.ToString() });
}
return yearList;
}
When you create a SelectList you can optionally pass in the SelectedValue property for which the documentation says
// selectedValue:
// The selected value. Used to match the Selected property of the corresponding
// System.Web.Mvc.SelectListItem.
However, if you pass it a value object which is not contained in the list of items, it still sets the selected value. Try this:
using System.Web.Mvc;
class SomeItem
{
public int id { get; set; }
public string text { get; set; }
}
class CreateSelectList
{
public static SelectList CreateSelectList()
{
List<SomeItem> items = new List<SomeItem>();
for (int i = 0; i < 3; i++)
{
items.Add(new SomeItem() { id = i, text = i.ToString() });
}
// 5 is not in the list of items yet the property SelectedValue does = 5
return new SelectList(items, "id", "text", 5);
}
}
My questions are:
Since I want to lazily set my selected value only if it exists, I just want to pass in a value and have it ignored when it does not exist in the list, but how? (is this a bug or a design feature), or
If you create a SelectList without the SelectedValue, after you have constructed it, how can you set the SelectedValue (again when it exists in the list) ?
If your code is near to your real scenario, you could use something like this
// check if there is any element with id = 5
if (items.Any(i => i.id == 5))
{
// there is an element with id = 5 so I set the selected value
return new SelectList(items, "id", "text", 5);
}
else
{
// there is no element with id = 5 so I don't set the selected value
return new SelectList(items, "id", "text");
}
On a mass-edit form page I display about 50 objects that have some boolean properties as well. The controller receives a FormCollection with all values from the edit page.
public void _EditAll(FormCollection c)
{
int i = 0;
if (ModelState.IsValid)
{
var arrId = c.GetValues("channel.ID");
var arrName = c.GetValues("channel.displayedName");
var arrCheckbox = c.GetValues("channel.isActive");
for (i = 0; i < arrId.Count(); i++)
{
Channel chan = db.Channels.Find(Convert.ToInt32(arrId[i]));
chan.displayedName = arrName[i];
chan.isActive = Convert.ToBoolean(arrCheckbox[i]);
db.Entry(chan).State = EntityState.Modified;
}
db.SaveChanges();
}
}
Now, for checkboxes, MVC creates hidden inputs on the form (otherwise "false" could not be posted back). In the controller, when receiving the FormCollection, this leads to the case that I receive an array of say
50 IDs,
50 names and ..
71 or so values for the checkboxes,
since the hidden checkbox has the same name as the visible one.
What's a good way to handle that and get the proper value of the checkbox?
Sample for editing array of entities that have boolean field.
Entity:
public class Entity
{
public int Id { get; set; }
public bool State { get; set; }
}
Controller:
public ActionResult Index()
{
Entity[] model = new Entity[]
{
new Entity() {Id = 1, State = true},
new Entity() {Id = 2, State = false},
new Entity() {Id = 3, State = true}
};
return View(model);
}
[HttpPost]
public ActionResult Index(Entity[] entities)
{
// here you can see populated model
throw new NotImplementedException();
}
View:
#model Entity[]
#{
using (Html.BeginForm())
{
for (int i = 0; i < Model.Count(); i++ )
{
#Html.Hidden("entities[" + i + "].Id", Model[i].Id)
#Html.CheckBox("entities[" + i + "].State", Model[i].State)
}
<input type="submit"/>
}
}
The only tricky thing is html elements naming.
More info about binding arrays.
I'm converting all arrays containing checkbox-values:
"false" => "false", if not preceded by "true"
I have been stuck on this problem for too long and would love some help.
On a view people can select two items from two radiobutton lists which returns via a FormMethod.Get to the Index event in HomeController.
These 2 values, 'parts and 'use' are queried to return a result and its passed back to the view via a viewbag. However the viewbag returns a line like { Item = Kona, Price = 400.0000, Quantity = 2 } in the view.
Whereas I want to return each item such as item.Item, Item.Price so I can use them individually.
I have tried everything I can find to no avail.
Anonymous classes items also throw red errors
View
foreach(var item in ViewBag.getstock)
{ //Show it and then make a new line with the <BR/>
#item < br / >
//{ Item = Kona, Price = 400.0000, Quantity = 2 }
}
HomeController
public ActionResult Index()
{
//this returns the entire query string
ViewBag.querystring = Request.QueryString;
//if any keys are in the url from the view
if (Request.QueryString.HasKeys())
{
//extract them out so that you can use them
//key = the name such as Part or Use it goes Key & Value this is passed to a Viewbag
//get(o) is getting the value at place 0, the first value in the url
ViewBag.querystringvalue0 = Request.QueryString.Get(0);
ViewBag.querystringvalue1 = Request.QueryString.Get(1);
}
//if there is any query string
if (Request.QueryString.HasKeys())
{
//pass the data to a couple of variables,
var parts = Request.QueryString.Get(0);
var use = Request.QueryString.Get(1);
//put them in a new query and return the results
ViewBag.getstock = from p in Bikeshopdb.Stocks
where p.PartName == parts && (p.Road == use || p.Mtn == use || p.Hybrid == use) select new
{
p.Item, p.Price, p.Quantity
};
}
return View(Bikeshopdb.Stocks.ToList());
Use a ViewModel class to hold the query results and pass back to the view. For example:
HomeController
public class MatchingStock()
{
public int ID { get; set; }
public string Item { get; set; }
public int Price { get; set; }
public int Quantity { get; set; }
}
public ActionResult Index()
{
//...
var list =
(from p in Bikeshopdb.Stocks
where p.PartName == parts &&
(p.Road == use || p.Mtn == use || p.Hybrid == use)
select new MatchingStock() {
ID = p.ID,
Item = p.Item,
Price = p.Price,
Quantity = p.Quantity}).ToList();
ViewBag.getstock = list;
//...
}
View
#foreach (var item in (List<MatchingStock>)ViewBag.getstock)
{
#item.Item #item.Price #item.Quantity
<br />
}
Basically I am looking to insert an item at the beginning of a SelectList with the default value of 0 and the Text Value of " -- Select One --"
Something like
SelectList list = new SelectList(repository.func.ToList());
ListItem li = new ListItem(value, value);
list.items.add(li);
Can this be done?
There really isn't a need to do this unless you insist on the value of 0. The HtmlHelper DropDownList extension allows you to set an option label that shows up as the initial value in the select with a null value. Simply use one of the DropDownList signatures that has the option label.
<%= Html.DropDownList( "DropDownValue",
(IEnumerable<SelectListItem>)ViewData["Menu"],
"-- Select One --" ) %>
I got this to work by Populating a SelectListItem, converting to an List, and adding a value at index 0.
List<SelectListItem> items = new SelectList(CurrentViewSetups, "SetupId", "SetupName", setupid).ToList();
items.Insert(0, (new SelectListItem { Text = "[None]", Value = "0" }));
ViewData["SetupsSelectList"] = items;
This is possible.
//Create the select list item you want to add
SelectListItem selListItem = new SelectListItem() { Value = "null", Text = "Select One" };
//Create a list of select list items - this will be returned as your select list
List<SelectListItem> newList = new List<SelectListItem>();
//Add select list item to list of selectlistitems
newList.Add(selListItem);
//Return the list of selectlistitems as a selectlist
return new SelectList(newList, "Value", "Text", null);
I liked #AshOoO's answer but like #Rajan Rawal I needed to preserve selected item state, if any. So I added my customization to his method AddFirstItem()
public static SelectList AddFirstItem(SelectList origList, SelectListItem firstItem)
{
List<SelectListItem> newList = origList.ToList();
newList.Insert(0, firstItem);
var selectedItem = newList.FirstOrDefault(item => item.Selected);
var selectedItemValue = String.Empty;
if (selectedItem != null)
{
selectedItemValue = selectedItem.Value;
}
return new SelectList(newList, "Value", "Text", selectedItemValue);
}
private SelectList AddFirstItem(SelectList list)
{
List<SelectListItem> _list = list.ToList();
_list.Insert(0, new SelectListItem() { Value = "-1", Text = "This Is First Item" });
return new SelectList((IEnumerable<SelectListItem>)_list, "Value", "Text");
}
This Should do what you need ,just send your selectlist and it will return a select list with an item in index 0
You can custome the text,value or even the index of the item you need to insert
Here html helper for you
public static SelectList IndividualNamesOrAll(this SelectList Object)
{
MedicalVarianceViewsDataContext LinqCtx = new MedicalVarianceViewsDataContext();
//not correct need individual view!
var IndividualsListBoxRaw = ( from x in LinqCtx.ViewIndividualsNames
orderby x.FullName
select x);
List<SelectListItem> items = new SelectList (
IndividualsListBoxRaw,
"First_Hospital_Case_Nbr",
"FullName"
).ToList();
items.Insert(0, (new SelectListItem { Text = "All Individuals",
Value = "0.0",
Selected = true }));
Object = new SelectList (items,"Value","Text");
return Object;
}
The .ToList().Insert(..) method puts an element into your List. Any position can be specified. After ToList just add .Insert(0, "- - First Item - -")
Your code
SelectList list = new SelectList(repository.func.ToList());
New Code
SelectList list = new SelectList(repository.func.ToList().Insert(0, "- - First Item - -"));
May not sound very elegant, but I usually do something like this:
var items = repository.func.ToList();
items.Insert(0, new funcItem { ID = 0, TextValue = "[None]" });
ViewBag.MyData = new SelectList(items);
Okay I like clean code so I made this an extension method
static public class SelectListHelper
{
static public SelectList Add(this SelectList list, string text, string value = "", ListPosition listPosition = ListPosition.First)
{
if (string.IsNullOrEmpty(value))
{
value = text;
}
var listItems = list.ToList();
var lp = (int)listPosition;
switch (lp)
{
case -1:
lp = list.Count();
break;
case -2:
lp = list.Count() / 2;
break;
case -3:
var random = new Random();
lp = random.Next(0, list.Count());
break;
}
listItems.Insert(lp, new SelectListItem { Value = value, Text = text });
list = new SelectList(listItems, "Value", "Text");
return list;
}
public enum ListPosition
{
First = 0,
Last = -1,
Middle = -2,
Random = -3
}
}
Usage (by example):
var model = new VmRoutePicker
{
Routes =
new SelectList(_dataSource.Routes.Select(r => r.RouteID).Distinct())
};
model.Routes = model.Routes.Add("All", "All", SelectListHelper.ListPosition.Random);
//or
model.Routes = model.Routes.Add("All");
As this option may need in many different manners, i reached to conclusion to develop an object so that it can be used in different scenarios and in future projects
first add this class to your project
public class SelectListDefaults
{
private IList<SelectListItem> getDefaultItems = new List<SelectListItem>();
public SelectListDefaults()
{
this.AddDefaultItem("(All)", "-1");
}
public SelectListDefaults(string text, string value)
{
this.AddDefaultItem(text, value);
}
public IList<SelectListItem> GetDefaultItems
{
get
{
return getDefaultItems;
}
}
public void AddDefaultItem(string text, string value)
{
getDefaultItems.Add(new SelectListItem() { Text = text, Value = value });
}
}
Now in Controller Action you can do like this
// Now you can do like this
ViewBag.MainCategories = new SelectListDefaults().GetDefaultItems.Concat(new SelectList(db.MainCategories, "MainCategoryID", "Name", Request["DropDownListMainCategory"] ?? "-1"));
// Or can change it by such a simple way
ViewBag.MainCategories = new SelectListDefaults("Any","0").GetDefaultItems.Concat(new SelectList(db.MainCategories, "MainCategoryID", "Name", Request["DropDownListMainCategory"] ?? "0"));
// And even can add more options
SelectListDefaults listDefaults = new SelectListDefaults();
listDefaults.AddDefaultItme("(Top 5)", "-5");
// If Top 5 selected by user, you may need to do something here with db.MainCategories, or pass in parameter to method
ViewBag.MainCategories = listDefaults.GetDefaultItems.Concat(new SelectList(db.MainCategories, "MainCategoryID", "Name", Request["DropDownListMainCategory"] ?? "-1"));
And finally in View you will code like this.
#Html.DropDownList("DropDownListMainCategory", (IEnumerable<SelectListItem>)ViewBag.MainCategories, new { #class = "form-control", onchange = "this.form.submit();" })
A work-around is to use #tvanfosson's answer (the selected answer) and use JQuery (or Javascript) to set the option's value to 0:
$(document).ready(function () {
$('#DropDownListId option:first').val('0');
});
Hope this helps.
Try something like the following code:
MyDAO MyDAO = new MyDAO();
List<MyViewModel> _MyDefault = new List<MyViewModel>() {
new MyViewModel{
Prop1= "All",
Prop2 = "Select all"
}
};
ViewBag.MyViewBag=
new SelectList(MyDAO
.MyList().Union(
_MyDefault
), "Prop1", "Prop2");
I don't if anybody else has a better option...
<% if (Model.VariableName == "" || Model.VariableName== null) { %>
<%= html.DropDpwnList("ListName", ((SelectList) ViewData["viewName"], "",
new{stlye=" "})%>
<% } else{ %>
<%= html.DropDpwnList("ListName", ((SelectList) ViewData["viewName"],
Model.VariableName, new{stlye=" "})%>
<% }>