I am new to MVC. I am developing an web application in asp.net MVC. I have a form through which users can get registered, after registration user redirected to ProfileView.aspx page. till here everything is fine.
Now I want to show the articles headings posted by that user right under his profile.
Right now I m using following code:
public ActionResult ProfileView(int id)
{
Profile profile = profileRepository.GetProfileByID(id);
var articles = articlesRepository.FindArticlesByUserID(id).ToList();
return View("ProfileView", profile);
}
Thanks for helping in advance
Baljit Grewal
I can think of two options:
Use the ViewData dictionary to store the articles.
public ActionResult ProfileView(int id)
{
Profile profile = profileRepository.GetProfileByID(id);
var articles = articlesRepository.FindArticlesByUserID(id).ToList();
ViewData["Articles"] = articles;
return View("ProfileView", profile);
}
Or, if you want to avoid using ViewData, create a ViewModel. A ViewModel is kind of a data transport object. You could create a ProfileViewModel class like this:
public class ProfileViewModel
{
public Profile Profile{ get; set; }
public IList<Article> Articles { get; set; }
}
or just include the Profile properties you are using in your view, this will make binding easier but you'll have to copy values from your Model to your ViewModel in your controller.:
public class ProfileViewModel
{
public int Id{ get; set; }
public string Name { get; set; }
.......
public IList<Article> Articles { get; set; }
}
If you go for this last option take a look at AutoMapper (an object to object mapper).
you will want your page to inherit from ViewPage and then you can use your model inside the .aspx markup like
Related
In my website I want to create a page where i want to display values and description stored in database like as different posts are displayed on a blog and by clicking over them we can open the post. Here I am adding a sample pic what I intended to get...
I am using asp.net please suggest me some sample code for generation of such page.
Entity:
[Table("Content")]
public class ContentEntity
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }
[Required]
public string Title { get; set; }
[Required]
public string SubTitle { get; set; }
public string Content { get; set; }
}
Home Controller:
public ActionResult Index()
{
var model = retrieveNecessaryData()
return View(model);
}
public ActionResult Details(int id)
{
var model = retrieveArticleById(id)
return View(model)
}
Index view:
#model List<pathtowhereverentityis.ContentEntity>
#foreach(var item in Model)
{
//Style these however
#item.Title
#Html.ActionLink("Link to article","Details","Home", new {id = item.Id},null)
}
This should get you started, content entity that is linked to the database. Home controller returns the index view with a model. Use a for each loop to iterate through the list and style each one however you like.
The action link will go to the the page where the content is.
Hope this helps.
EDIT:
This code won't work out the box, it's just example code to get you going. If you're a beginner and need further help, feel free to ask
I have set up a large form with lots of entries. It populates my model and then saves to the database. I also need to be able to pull this information out of the database, put it into the model, and populate a bunch of fields with it for review. How do I do this?
Using ASP.NET MVC 4 Razor.
var db = new TechProjPlansContext();
TechProjPlan model = new TechProjPlan();
I can set up my data context and model, but where do I go from here to populate the model with a data entry chosen by ID?
You can search by givenId and if found return result type of TechProjPlan otherwise null
var resultFound = db.TechProjPlans.Where(e=>e.Id = givenId).FirstOrDefault();
I strongly recommend following this tutorial step by step. From the tutorial to answer your question:
Write a Model class like:
public class Movie
{
public int ID { get; set; }
public string Title { get; set; }
public DateTime ReleaseDate { get; set; }
public string Genre { get; set; }
public decimal Price { get; set; }
}
Add a DbSet to your Context class: (TechProjPlansContext in your project)
public class MovieDBContext : DbContext
{
public DbSet<Movie> Movies { get; set; }
}
Make sure you can connect to the database server, check your connectionStrings in your Web.config file.
As you wanted to filter only one Entity by using ID, you need a Controller class:
public ActionResult Details(int id = 0) // here id is set to 0 if it's null
{
Movie movie = db.Movies.Find(id);
if (movie == null)
{
return HttpNotFound();
}
return View(movie);
}
As you see, you'll be returning View(movie), that means you return Details page with the Entity (a movie) you got from the database. And have a View, that renders to actual HTML code the client will see. At the top of it, add the line:
#model MvcMovie.Models.Movie // (something TechProjPlans.Models.Movie in your project)
#Html.LabelFor(model => model.Title)
This will create a simple text showing the movie's title.
It's not logical to go deeper within an answer, so rest is up to you with that tutorial. Just keep in mind that the code above is only one example and you can use endless variations within each level for your situation.
You can right click on the directory Controllers, select Add New and select your Model class and Context class at the page. That will produce a Controller and Views (index, edit, delete, details, insert) tied to it which will be a good way to start your MVC study.
How to save two Entities from one View. Suppose I have two Entities Party and Person with One to Many relation. Now I need to save both Entities from Party View. I am using ASP.NET MVC4.
public partial class Cm_Opt_Pty_Party_S
{
public Cm_Opt_Pty_Party_S()
{
this.Cm_Opt_Psn_Person_S = new HashSet<Cm_Opt_Psn_Person_S>();
}
public int Pty_ID { get; set; }
public Nullable<int> Pty_PARTYTYPECODE { get; set; }
public string Pty_FULLNAME { get; set; }
public string Pty_GOVTID { get; set; }
public Nullable<int> Pty_GOVTIDTC { get; set; }
public Nullable<int> Pty_GOVTIDSTAT { get; set; }
public virtual ICollection<Cm_Opt_Psn_Person_S> Cm_Opt_Psn_Person_S { get; set; }
}
What you can do is create a ViewModel This class would contain the relevant properties needed to create both entities.
Then you base your View on the ViewModel instead, and pass that to the controller.
When you want to save the entities, you can build up the separate entities and save them.
I have a better understanding of your issue, so editing this answer to show the solution I would use.
Your Controller will deliver the Party object to your view for displaying the Party information. Using a loop you can display the items contained in the collection.
#foreach(var m in Model.Persons)
{
#Html.DisplayFor(model=>m.FirstName)
#Html.DisplayFor(model=>m.Surname)
}
When you want to add more items into the collection, you will need to render a partial view or new view containing a form for adding a Person. It will be strongly typed as Person model and the Controller action recieving the post will be expecting a Person
If for example a Person just had a FirstName,Surname and PartyId the form would use these helpers in your view
#Html.TextboxFor(m=>m.FirstName)
#Html.TextboxFor(m=>m.Surname)
#Html.TextBoxFor(m=>m.PartyId)
You then submit that back to your controller, and have logic for adding the person to the collection. Then return the view with Party model containing the newly added Person in the Persons collection.
Using #Ajax.BeginForm or some custom Jquery/Javascript you could handle this async to prevent page refreshing during the process.
If you don't want to do it this way, another option is EditorTemplates. See here for example: ASP.NET MVC LIST and Create in same view
I have an experience in work with ASP.NET forms, but new to MVC.
How can I get data from shared views on postback?
In ASP.NET Forms I can write something like this:
ASP.NET Forms:
Model code:
public class MyModelItem
{
// Just TextBox is enough for editing this
public string SimpleProperty { get; set; }
// For this property separate NestedItemEditor.ascx is required
public MyModelNestedItem ComplexProperty { get; set; }
}
public class MyModelNestedItem
{
public string FirstProperty { get; set; }
public string SecondProperty { get; set; }
}
Behavior:
Control for editing MyModelNestedItem is separate ASCX control NestedItemEditor.ascx
This is just for example, MyModelNestedItem can be much more complex, I just want to give idea what I mean.
Now when I showing this item for editing, I'm showing one asp:TextBox and one NestedItemEditor.ascx. On page postback I'm gathering data from both and that's it.
Problem with MVC:
When I'm trying to implement this scenario with MVC, I'm using customized EditorFor (through using UIHint and creating shared view). So this shared view Views\Shared\EditorTemplates\MyModelNestedItem.cshtml can now display data that is already in MyModelNestedItem property but I have no idea how to make it return new entered data.
When parent controller recieves a post request, data seems to be in Request.Form, but which is civilized way to reach it? Sure, the best solution will be if data will fetch automatically into the MyModelItem.ComplexProperty.
The action which is called on post needs to be something like:
[HttpPost]
public ActionResult Index(MyViewModel mdl)
Then all the properties of the model which have input controls (or hidden inputs) on the form will have the data which was entered on the form (or passed to it or modified by javascript, in the case of hidden inputs).
This assumes that MyViewModel is the model referenced in your view.
Writing an ActionResult method in the controller with the complex type simply worked for me:
public class Topic
{
public Topic()
{
}
public DetailsClass Details
{
get;
set;
}
}
public class DetailsClass
{
public string TopicDetails
{
get;
set;
}
}
The view:
#modelTopic
#using (Html.BeginForm("Submit","Default"))
{
#Html.EditorFor(m=>m.Details)
#:<input type="submit" />
}
The controller:
public ActionResult Index()
{
Topic topic = new Topic();
return View( topic);
}
public ActionResult Submit(Topic t)
{
return View(t);
}
When submited, the Topic t contains the value i ented within the editor (Assuming You have a custom editor for the complex type, DetailsClass in my sample)
I am new to MVC3
DB has a table called users (id,name,username,lat,lon). I do not have access to the database.
I created entity model using the above table. Then, I created a SearchController and Search View. On the index page I display the list of all users. Also, I created a form on the page that searches the table using the username. After clicking on the details link I show the details page where I display the user's details.
Now I need to display other users that are within a mile of the selected user. I already have the sql query to get the list of other users that are within a mile of the selected user (This is a sql query). I need to show this list on Details page.
I created a custom class model.
public class SearchDetailsViewModel
{
public decimal id { get; set; }
public string name { get; set; }
public string username { get; set; }
public Nullable<decimal> lat { get; set; }
public Nullable<decimal> lon { get; set; }
public string profile_img_url { get; set; }
public IQueryable<user> usersWithinAMile { get; set; }
}
I am not sure if this is the right approach. Also, I do not know how I would intialize this class.
Any help or suggestion is really appreciated.
Yes, you are on the right track, you get the data from your SQL into the class, and then to the view, in the ActionResult, like this:
using System.Collections.Generic;
public ActionResult Index() {
var data = new List<SearchDetailsViewModel>();
// foreach row in your SQL
var s = new SearchDetailsViewModel();
s.lat = -42.00000M;
// more data added to the s object here
data.Add(s);
// end loop
return View("ThePage", data);
}
Then on your view itself you would do something like this:
#foreach (var s in Model) {
// output your values on the page
}