this is my action
[ChildActionOnly]
public PartialViewResult ArchiveSidebar()
{
var currentDate = DateTime.Now;
var list = new List<string>();
for (var startDate = new DateTime(2013, 5, 1); startDate.Month <= currentDate.Month; startDate = startDate.AddMonths(1))
{
list.Add(startDate.ToString("MMMM, yyyy"));
if (startDate.Month == currentDate.Month)
break;
}
return PartialView("_ArchiveSidebar", list);
}
and this is the _ArchiveSidebar
#model List<string>
<div class="sidebar">
<h3>Archive</h3>
#foreach (string archive in Model)
{
<ul>
<li>
<h3>{
#Html.ActionLink(archive, "Archive", "Blog",new{month=archive?,year=archive ?},null)
}
</h3>
</li>
</ul>
}
</div>
in above view I want to get the element of List to call archive action with year and month parameters ,how can I get the year and month ???(where I have have put ? )
this is the archive action
public ActionResult Archive(int month, int year)
{
var posts = _blogRepository.GetPostByDate(year, month);
return View(posts);
}
First, create a viewmodel that will contain the month and year
public class BlogPeriod {
public int Month {get;set;}
public int Year {get;set;}
// if you want to pass the formatted date to your view
// then add this
public string FormattedDate {get;set;}
}
Then use it to build your list and return it to your view
var list = new List<BlogPeriod>();
for (...)
{
// rest of your code goes here
list.Add(new BlogPeriod {
Month = startDate.Month,
Year = startDate.Year,
// do you want your formatted date, add this
FormattedDate = startDate.ToString("MMMM, yyyy")
});
}
return PartialView("_ArchiveSidebar", list);
Then change your view to
#model IEnumerable<BlogPeriod>
#foreach (string archive in Model)
{
// your markup goes here
#Html.ActionLink(archive, "Archive", "Blog",
new{month=archive.Month, year=archive.Year},null)
}
Related
I have 5 records coming from a simple select stored procedure.
ID Name
1 RecordOne
2 RecordTwo
3 RecordThree
4 RecordFour
5. RecordFive
Requirement is to display one record at a time example:
Record One
Previous Next
Two Action links or buttons with Previous and Next text.
If user clicks Next user will see
RecordTwo
and so on,same for previous case.
My model
namespace MVCLearning.Models
{
public class VMNews
{
public List<Student> StudentDetails { get; set; }
}
public class Student
{
public int ID { get; set; }
public string Name { get; set; }
}
}
Action
public ActionResult Index()
{
VMNews objnews = new VMNews();
objnews.StudentDetails = db.Database.SqlQuery<Student>("usp_studentdetails").ToList();
return View(objnews);
}
View
<div>
#foreach (var item in Model.SD.Take(1))
{
<h3>#item.Name</h3>
<h3>#item.Age</h3>
}
#Html.ActionLink("Next", "index", new { Model.SD[0].ID})
#Html.ActionLink("Previous", "index", new { Model.SD[0].ID })
The way I have written the view is totally wrong am not getting how and what to write on the action and what to write on the View.
What will be one of the way to achieve this.
Change you method to
public ActionResult Index(int? index)
{
int max = 5; // modify based on the actual number of records
int currentIndex = index.GetValueOrDefault();
if (currentIndex == 0)
{
ViewBag.NextIndex = 1;
}
else if (currentIndex >= max)
{
currentIndex = max;
ViewBag.PreviousIndex = currentIndex - 1;
}
else
{
ViewBag.PreviousIndex = currentIndex - 1;
ViewBag.NextIndex = currentIndex + 1;
}
VMNews objnews = new VMNews();
Student model = db.Database.SqlQuery<Student>("usp_studentdetails")
.Skip(currentIndex).Take(1).FirstOrDefault();
return View(model);
}
Note that the query has been modified to return only one Student since that is all that you require in the view. Also I have asssumed if a user enters a value greater than the number of records it will return the last record (you may in fact want to throw an error?)
The view now needs to be
#model Student
<h3>#Model.Name</h3>
<h3>#Model.Age</h3>
#if (ViewBag.PreviousIndex != null)
{
#Html.ActionLink("Previous", "Index", new { index = ViewBag.PreviousIndex })
}
#if (ViewBag.NextIndex != null)
{
#Html.ActionLink("Next", "Index", new { index = ViewBag.NextIndex })
}
The following code is taken from the tutorial: http://www.asp.net/mvc/tutorials/getting-started-with-aspnet-mvc3/cs/examining-the-edit-methods-and-edit-view which shows how ASP.net MVC 3 can be used to manage a movie database.
In the tutoral, a list object is added to the controller class that contains every movie genre that exists in the database. This list is then passed to a drop-down in the view enabling the database to be searched by genre.
Controller: (code related to movie genre in bold)
public ActionResult SearchIndex(string movieGenre, string searchString)
{
var GenreLst = new List<string>();
var GenreQry = from d in db.Movies
orderby d.Genre
select d.Genre;
GenreLst.AddRange(GenreQry.Distinct());
ViewBag.movieGenre = new SelectList(GenreLst);
var movies = from m in db.Movies
select m;
if (!String.IsNullOrEmpty(searchString))
{
movies = movies.Where(s => s.Title.Contains(searchString));
}
if (string.IsNullOrEmpty(movieGenre))
return View(movies);
else
{
return View(movies.Where(x => x.Genre == movieGenre));
}
}
What I want to do is enhance this further so that the movies can be searched by price as well as genre. I know I can re-use the much of the same code to do this. I think I need to create a new class that the controller class can pass either the genre or price. Is this correct? IF so, I'd appreciate an example. Thanks.
Update/Clarification:
I want to avoid repeating the code for both genre and price as below:
public ActionResult SearchIndex(string movieGenre, string searchString,float moviePrice)
{
var GenreLst = new List<string>();
var GenreQry = from d in db.Movies
orderby d.Genre
select d.Genre;
GenreLst.AddRange(GenreQry.Distinct());
ViewBag.movieGenre = new SelectList(GenreLst);
var PriceLst = new List<string>();
var PriceQry = from d in db.Movies
orderby d.Genre
select d.Genre;
PriceLst.AddRange(GenreQry.Distinct());
ViewBag.moviePrice = new SelectList(PriceLst);
var movies = from m in db.Movies
select m;
if (!String.IsNullOrEmpty(searchString))
{
movies = movies.Where(s => s.Title.Contains(searchString));
}
if (string.IsNullOrEmpty(movieGenre))
return View(movies);
else
{
return View(movies.Where(x => x.Genre == movieGenre));
}
if (string.IsNullOrEmpty(moviePrice))
return View(movies);
else
{
return View(movies.Where(x => x.Genre == moviePrice));
}
}
You just have to insert a text box in the view to get price value. Then receive this value at action and modify the query to get desired results.
like this:
#Html.ActionLink("Create New", "Create")
#using (Html.BeginForm()){
<p>Genre: #Html.DropDownList("movieGenre", "All")
Title: #Html.TextBox("SearchString")
Price: #Html.TextBox("Price")
<input type="submit" value="Filter" /></p>
}
And in the action method you are using the code below to populate the dropdownlist with genre values. You need not do the same for price value.
var GenreLst = new List<string>();
var GenreQry = from d in db.Movies
orderby d.Genre
select d.Genre;
GenreLst.AddRange(GenreQry.Distinct());
ViewBag.movieGenre = new SelectList(GenreLst);
And in your action method you just have to use the value of price to filter data
public ActionResult SearchIndex(string movieGenre, string searchString,float price)
{
var GenreLst = new List<string>();
var GenreQry = from d in db.Movies
orderby d.Genre
select d.Genre;
GenreLst.AddRange(GenreQry.Distinct());
ViewBag.movieGenre = new SelectList(GenreLst);
var movies = from m in db.Movies
select m;
if (!String.IsNullOrEmpty(searchString))
{
movies = movies.Where(s => s.Title.Contains(searchString));
}
if (string.IsNullOrEmpty(movieGenre))
return View(movies);
else
{
return View(movies.Where((x => x.Genre == movieGenre) &&(x => x.Price== price)));
}
}
You can do it in so many different ways while all are correct but it depends on the complexity of your project. Basically you don't want to over-engineer a simple program. But in general you should move all of your logic to a separate class and use your actions for creating and calling the right logic class:
public class GetMoviesRequest
{
public string Name { get; set; }
public float? Price { get; set; }
}
public class MoviesLogic
{
private List<Movie> Movies;
public IEnumerable<Movie> Get(GetMoviesRequest request)
{
IEnumerable<Movie> filtered = Movies.AsQueryable();
if (!string.IsNullOrEmpty(request.Name))
{
//Filter by name
filtered = filtered.Where(m => m.Name == request.Name);
}
if (request.Price.HasValue)
{
//Filter by value
filtered = filtered.Where(m => m.Price == request.Price);
}
return filtered;
}
}
public class MyController
{
public ActionResult SearchIndex(string movieGenre, string searchString)
{
var logic = new MoviesLogic();
var movies = logic.Get(new GetMoviesRequest() { Name = searchString } )
///do stuff with movies
}
}
I'm trying to query for a particular column & to show the item list in view properly one after another. Here is my code:
Controller:
public ActionResult ShowImage()
{
using (var context = new ImageTrialDBEntities())
{
var pathlist = (from s in context.Images
select s.ImageLink).ToList();
var model = new ImageModel();
model.ImageList = pathlist;
return View(model);
}
}
Model:
public class ImageModel
{
public string Image { get; set; }
public IList<string> ImageList { get; set; }
}
View:
<div>
#foreach (var s in Model.ImageList)
{
#Html.DisplayFor(x=>x.ImageList)
<br />
}
</div>
The list is showing like this:
I would like to show one at a time with a break in between. Please help.
Replace
#Html.DisplayFor(x=>x.ImageList)
with
#Html.DisplayFor(x=>s)
You have 2 loops in the view code. Try just printing out the variable s.
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)
Relatively new to MVC and trying to get a cascading dropdown list working for train times.
After looking at a lot of posts, people say that you should stay away from ViewBag/ViewData and instead focus on ViewModels, but I just can't seem to get my head round it, and it's driving me up the wall. Any tutorial seems to be either to complex or too easy and the whole viewModel idea just hasn't clicked with me yet.
So here is my scenario: I have an admin system where staff can add individual train journeys. For each train time, I have an input form where the user can choose a Company, and from there, I'd like the dropdownlist underneath to populate with a list of journey numbers, which indicate routes. Once they have chosen a number, they can carry on with the rest of the form, which is quite large, including time of travel, facilities on the train etc.
I've created a viewmodel like so:
public class JourneyNumbersViewModel
{
private List<SelectListItem> _operators = new List<SelectListItem>();
private List<SelectListItem> _journeys= new List<SelectListItem>();
[Required(ErrorMessage = "Please select an operator")]
public string SelectedOperator { get; set; }
[Required(ErrorMessage = "Please select a journey")]
public string SelectedJourney { get; set; }
public List<SelectListItem> Journeys
{
get { return _journeys; }
}
public List<SelectListItem> Operators
{
get
{
foreach(Operator a in Planner.Repository.OperatorRepository.GetOperatorList())
{
_operators.Add(new SelectListItem() { Text = a.OperatorName, Value = a.OperatorID.ToString() });
}
return _operators;
}
}
}
In my controller, I have this for the Create view:
public ActionResult Create()
{
return View(new JourneyNumbersViewModel());
}
And this is where it isn't really working for me - if I change my model at the top of the Create view to: #model Planner.ViewModels.JourneyNumbersViewModel, then the rest of my form throws errors as the model is no longer correct for the rest of the form. Is this the way it is supposed to work - what if you need to reference multiple view models with a single view?
I know this is a simple thing and as soon as it clicks I'll wonder how on earth I could have struggled with it in the first place, but if anyone can point out where I'm going wrong, I'd be very grateful.
I have done something similar. Here is some of the code (apologies upfront for this being quite long, but I wanted to make sure you could re-create this on your side):
View looks like this:
using Cascading.Models
#model CascadingModel
#{
ViewBag.Title = "Index";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>Cascading Forms</h2>
<table>
#using(Html.BeginForm("Index", "Home"))
{
<tr>
<td>#Html.LabelFor(m=>m.CategoryId)</td>
<td>#Html.DropDownListFor(m => m.CategoryId, new SelectList(Model.Categories, "Id", "Name"), string.Empty)</td>
</tr>
<tr>
<td>#Html.LabelFor(m=>m.ProductId)</td>
<td>#Html.CascadingDropDownListFor(m => m.ProductId, new SelectList(Model.Products, "Id", "Name"), string.Empty, null, "CategoryId", "Home/CategorySelected")</td>
</tr>
<tr>
<td> </td>
<td><input type="submit" value="Go"/></td>
</tr>
}
</table>
the Model looks as follows:
public class CascadingModel
{
public int CategoryId { get; set; }
public List<Category> Categories { get; set; }
public int ProductId { get; set; }
public List<Product> Products { get; set; }
}
the real "clever" part of the system is the Html.CascadingDropDownListFor which looks as follows:
public static class MvcHtmlExtensions
{
public static MvcHtmlString CascadingDropDownListFor<TModel, TProperty>(
this HtmlHelper<TModel> htmlHelper,
Expression<Func<TModel, TProperty>> expression,
IEnumerable<SelectListItem> selectList,
string optionLabel,
IDictionary<string, Object> htmlAttributes,
string parentControlName,
string childListUrl
)
{
var memberName = GetMemberInfo(expression).Member.Name;
MvcHtmlString returnHtml = Html.SelectExtensions.DropDownListFor(htmlHelper, expression, selectList, optionLabel, htmlAttributes);
var returnString = MvcHtmlString.Create(returnHtml.ToString() +
#"<script type=""text/javascript"">
$(document).ready(function () {
$(""#<<parentControlName>>"").change(function () {
var postData = { <<parentControlName>>: $(""#<<parentControlName>>"").val() };
$.post('<<childListUrl>>', postData, function (data) {
var options = """";
$.each(data, function (index) {
options += ""<option value='"" + data[index].Id + ""'>"" + data[index].Name + ""</option>"";
});
$(""#<<memberName>>"").html(options);
})
.error(function (jqXHR, textStatus, errorThrown) { alert(jqXHR.responseText); });
});
});
</script>"
.Replace("<<parentControlName>>", parentControlName)
.Replace("<<childListUrl>>", childListUrl)
.Replace("<<memberName>>", memberName));
return returnString;
}
private static MemberExpression GetMemberInfo(Expression method)
{
LambdaExpression lambda = method as LambdaExpression;
if (lambda == null)
throw new ArgumentNullException("method");
MemberExpression memberExpr = null;
if (lambda.Body.NodeType == ExpressionType.Convert)
{
memberExpr = ((UnaryExpression)lambda.Body).Operand as MemberExpression;
}
else if (lambda.Body.NodeType == ExpressionType.MemberAccess)
{
memberExpr = lambda.Body as MemberExpression;
}
if (memberExpr == null)
throw new ArgumentException("method");
return memberExpr;
}
}
Controller Logic for those looking for it:
public ActionResult CategoriesAndProducts()
{
var viewModel = new CategoriesAndProductsViewModel();
viewModel.Categories = FetchCategoriesFromDataBase();
viewModel.Products = FetchProductsFromDataBase();
viewModel.CategoryId = viewModel.Categories[0].CategoryId;
viewModel.ProductId = viewModel.Products.Where(p => p.CategoryId).FirstOrDefault().ProductId;
return View(viewModel);
}