*CORRECTION
The problem occurs when my view is called to populate a list from my user table.
The model item passed into the dictionary is of type 'System.Collections.Generic.List`1[Mike.Models.User]', but this dictionary requires a model item of type 'Mike.Models.User'.
Here is my controller action:
public ActionResult Registration(Mike.Models.User user)
{
if (ModelState.IsValid)
{
using (var db = new UserContext())
{
var crypto = new SimpleCrypto.PBKDF2();
var encrypPass = crypto.Compute(user.password);
var sysUser = db.Users.Create();
sysUser.LastName = user.LastName;
sysUser.FirstName = user.FirstName;
sysUser.Email = user.Email;
sysUser.password = encrypPass;
sysUser.passwordSalt = crypto.Salt;
sysUser.UserID = user.UserID;
db.Users.Add(sysUser);
db.SaveChanges();
return RedirectToAction("Index", "Home");
}
}
return View(user);
}
Can someone please help me.... There are responses to similar questions on the internet but I believe mine is unique.. I have searched for weeks to no avail.
Thanks in advance,
Renior
Here is my simple controller action...
public ActionResult Index()
{
return View(db.Users.ToList());
}
and my razor syntax.
#model IEnumerable
Im trying to populate a view of my user table list..
In your Registration view at the top where your model declaration is, instead of this:
#model List<Mike.Models.User>
you need to have:
#model Mike.Models.User
You probably used strongly typed scaffolding feature to generate your view but instead of details option you chose a list option...
Take this at face value - yours is not unique. Your problem is you are passing an array of user to a controller action that expects a user.
You need to post your HTML but it is probably something like #model List user or something instead of a single user.
If your model represents a single user then pass that to the controller. If opposite, do opposite,
If you want to pass a list to the controller use list users
edit
make your razor syntax
#model Mike.Models.User
Related
Im new to MVC. How can i filter and get all the records displayed related to a particular dataitem. Eg. If i click to Id =2 i want to display all items which has id=2. Please could anyone help
In your controller, you want to use LINQ. For example:
public ActionResult GetListOfSomething()
{
var context = new MyDataContext();
var model= new MyModel();
model.ItemList = context.MyObject.Where(x => x.SomeProperty == "SomeValue").ToList();
return View(model);
}
This is a pretty simple example, but illustrates the concepts.
I am new to asp .net MVC 4.
I have one text box and the text box value I am fetching from one table.But while clicking on submit button this value I want to insert into different table , which is not inserting and showing error.It is taking value as null.
coding
View
#Html.TextBox("empname", (string)ViewBag.empname, new { #readonly = "readonly" })
controller
[HttpGet]
public ActionResult Facilities()
{
mstEmpDetail emp = new mstEmpDetail();
emp = db.mstEmpDetails.Single(x => x.intEmpId == 10001);
ViewBag.empname = emp.txtEmpFirstName;
return View();
}
[HttpPost]
public ActionResult Facilities(TrnBusinessCardDetail bc)
{
var empname1 = ViewBag.empname;
bc.txtfirstName = empname1;
db.TrnBusinessCardDetails.Add(bc);
db.SaveChanges();
return RedirectToAction("Facilities");
}
While I was working with normal text box it was inserting properly,but when I have retrieve
fro DB then i am getting this problem ?
How to solve this problem ?
Viewbag is a one way street - you can use it to pass information to the view, but you cannot use it to get the information from the view. The statement ViewBag.empname in your POST method has a value of null in your code.
As suggested by #dotnetom, ViewBag is a one way street. MVC is stateless so a POST request is not a "Round Trip" from previous get request. Thus your ViewBag can not hold its state.
MVC can determine (and construct) your action parameters from Form Parameters. In your case you have added a textbox with name "empname". So you should get this value as parameter in your POST request.
[HttpPost]
public ActionResult Facilities(TrnBusinessCardDetail bc, string empname)
{
bc.txtfirstName = empname;
db.TrnBusinessCardDetails.Add(bc);
db.SaveChanges();
return RedirectToAction("Facilities");
}
This would be simplest of solution given your problem. More appropriate would be binding your textbox directly with you model property. This way you will not have to worry about retrieving and assigning property value to model in your controller.
I think the problem is when you are using var empname1 = ViewBag.empname; in post controller because ViewBag.empname lost its value at that time.
What i want in the view is to spit out the fields that are part of the Department and Employee models depending on whichever one gets mentioned in the URL.
say for example department model has 5 fields
How do i create a view (dynamic/not strongly typed) that automatically displays the fields based on the model and let the user enter the values?
[HttpGet]
public ActionResult Create(string process)
{
if (process.Equals("Department"))
{
var model = new Department();
return View(model);
}
else if (process.Equals("Employee"))
{
var model = new Employee();
return View(model);
}
else
return View();
}
You can pass it as an object. You could also pass it in the viewdata (or viewbag). For both of these ways you would also need to include a flag so you know which one you should cast to. Both of these ways in my opinion though are hokey and prone to problems.
Another way would be to create a view model that combines both models. I personally would try to keep them separate and use separate calls \ views for each, depending on the requirements.
I am currently working on an Umbraco MVC 4 project version 6.0.5. The project currently uses Vega.USiteBuilder to build the appropriate document types in the backoffice based on strongly typed classes with mapping attributes. Consequently, all my razor files inherit from UmbracoTemplatePageBase
I am coming across a road block trying to invoke a HTTP GET from a razor file. For example a search form with multiple fields to submit to a controller action method, using a SurfaceController using Html.BeginUmbracoForm.
My Html.BeginUmbracoForm looks like this
#using (Html.BeginUmbracoForm("FindTyres", "TyreSearch"))
{
// Couple of filter fields
}
I basically have a scenario where I will like to retrieve some records from an external database outside of Umbraco (external to Umbraco Database) and return the results in a custom view model back to my Umbraco front end view. Once my controller and action method is setup to inherit from SurfaceController and thereafter compiling it and submitting the search, I get a 404 resource cannot be found where the requested url specified: /umbraco.RenderMVC.
Here is my code snippet:
public ActionResult FindTyres(string maker, string years, string models, string vehicles)
{
var tyreBdl = new Wheels.BDL.TyreBDL();
List<Tyre> tyres = tyreBdl.GetAllTyres();
tyres = tyres.Where(t => string.Equals(t.Maker, maker, StringComparison.OrdinalIgnoreCase)
&& string.Equals(t.Year, years, StringComparison.OrdinalIgnoreCase)
&& string.Equals(t.Model, models, StringComparison.OrdinalIgnoreCase)
&& string.Equals(t.Version, vehicles, StringComparison.OrdinalIgnoreCase)).ToList();
var tyreSearchViewModel = new TyreSearchViewModel
{
Tyres = tyres
};
ViewBag.TyreSearchViewModel = tyreSearchViewModel;
return CurrentUmbracoPage();
}
I then resort to using standard MVC, Html.BeginForm (the only difference). Repeating the steps above and submitting the search, I get the following YSOD error.
Can only use UmbracoPageResult in the context of an Http POST when
using a SurfaceController form
Below is a snippet of the HTML BeginForm
#using (Html.BeginForm("FindTyres", "TyreSearch"))
{
// Couple of filter fields
}
I feel like I am fighting the Umbraco routes to get my controller to return a custom model back to the razor file. I have googled alot trying to figure out how to do a basic search to return a custom model back to my Umbraco front end view till the extent that I tried to create a custom route but that too did not work for me.
Does my controller need to inherit from a special umbraco controller class to return the custom model back? I will basically like to invoke a HTTP GET request (which is a must) so that my criteria search fields are reflected properly in the query strings of the url. For example upon hitting the search button, I must see the example url in my address browser bar
http://[domainname]/selecttyres.aspx/TyresSearch/FindTyresMake=ASIA&Years=1994&Models=ROCSTA&Vehicles=261
Therefore, I cannot use Surface Controller as that will operate in the context of a HTTP Post.
Are there good resource materials that I can read up more on umbraco controllers, routes and pipeline.
I hope this scenario makes sense to you. If you have any questions, please let me know. I will need to understand this concept to continue on from here with my project and I do have a deadline.
There are a lot of questions about this and the best place to look for an authoritative approach is the Umbraco MVC documentation.
However, yes you will find, if you use Html.BeginUmbracoForm(...) you will be forced into a HttpPost action. With this kind of functionality (a search form), I usually build the form manually with a GET method and have it submit a querystring to a specific node URL.
<form action="#Model.Content.Url"> ... </form>
On that page I include an #Html.Action("SearchResults", "TyresSearch") which itself has a model that maps to the keys in the querystring:
[ChildAction]
public ActionResult(TyreSearchModel model){
// Find results
TyreSearchResultModel results = new Wheels.BDL.TyreBDL().GetAllTyres();
// Filter results based on submitted model
...
// Return results
return results;
}
The results view just need to have a model of TyreSearchResultModel (or whatever you choose).
This approach bypasses the need for Umbraco's Controller implementation and very straightforward.
I have managed to find my solution through route hijacking which enabled me to return a custom view model back to my view and work with HTTP GET. It worked well for me.
Digby, your solution looks plausible but I have not attempted at it. If I do have a widget sitting on my page, I will definitely attempt to use your approach.
Here are the details. I basically override the Umbraco default MVC routing by creating a controller that derived from RenderMvcController. In a nutshell, you implement route hijacking by implementing a controller that derives from RenderMvcController and renaming your controllername after your given documenttype name. Recommend the read right out of the Umbraco reference (http://our.umbraco.org/documentation/Reference/Mvc/custom-controllers) This is also a great article (http://www.ben-morris.com/using-umbraco-6-to-create-an-asp-net-mvc-4-web-applicatio)
Here is my snippet of my code:
public class ProductTyreSelectorController : Umbraco.Web.Mvc.RenderMvcController
{
public override ActionResult Index(RenderModel model)
{
var productTyreSelectorViewModel = new ProductTyreSelectorViewModel(model);
var maker = Request.QueryString["Make"];
var years = Request.QueryString["Years"];
var models = Request.QueryString["Models"];
var autoIdStr = Request.QueryString["Vehicles"];
var width = Request.QueryString["Widths"];
var aspectRatio = Request.QueryString["AspectRatio"];
var rims = Request.QueryString["Rims"];
var tyrePlusBdl = new TPWheelBDL.TyrePlusBDL();
List<Tyre> tyres = tyrePlusBdl.GetAllTyres();
if (Request.QueryString.Count == 0)
{
return CurrentTemplate(productTyreSelectorViewModel);
}
if (!string.IsNullOrEmpty(maker) && !string.IsNullOrEmpty(years) && !string.IsNullOrEmpty(models) &&
!string.IsNullOrEmpty(autoIdStr))
{
int autoId;
int.TryParse(autoIdStr, out autoId);
tyres = tyres.Where(t => string.Equals(t.Maker, maker, StringComparison.OrdinalIgnoreCase) &&
string.Equals(t.Year, years, StringComparison.OrdinalIgnoreCase) &&
string.Equals(t.Model, models, StringComparison.OrdinalIgnoreCase) &&
t.AutoID == autoId)
.ToList();
productTyreSelectorViewModel.Tyres = tyres;
}
else if (!string.IsNullOrEmpty(width) && !string.IsNullOrEmpty(aspectRatio) && !string.IsNullOrEmpty(rims))
{
tyres = tyres.Where(t => string.Equals(t.Aspect, aspectRatio, StringComparison.OrdinalIgnoreCase) &&
string.Equals(t.Rim, rims, StringComparison.OrdinalIgnoreCase)).ToList();
productTyreSelectorViewModel.Tyres = tyres;
}
var template = ControllerContext.RouteData.Values["action"].ToString();
//return an empty content result if the template doesn't physically
//exist on the file system
if (!EnsurePhsyicalViewExists(template))
{
return Content("Could not find physical view template.");
}
return CurrentTemplate(productTyreSelectorViewModel);
}
}
Note my ProductTyreSelectorViewModel must inherit from RenderModel for this to work and my document type is called ProductTyreSelector. This way when my model is returned with the action result CurrentTemplate, the Umbraco context of the page is retained and my page is rendered appropriately again. This way, all my query strings will show all my search/filter fields which is what I want.
Here is my snippet of the ProductTyreSelectorViewModel class:
public class ProductTyreSelectorViewModel : RenderModel
{
public ProductTyreSelectorViewModel(RenderModel model)
: base(model.Content, model.CurrentCulture)
{
Tyres = new List<Tyre>();
}
public ProductTyreSelectorViewModel(IPublishedContent content, CultureInfo culture)
: base(content, culture)
{
}
public ProductTyreSelectorViewModel(IPublishedContent content)
: base(content)
{
}
public IList<Tyre> Tyres { get; set; }
}
This approach will work well perhaps with one to two HTTP GET forms on a given page. If there are multiple forms within in a page, then a good solution will may be to use ChildAction approach. Something I will experiment with further.
Hope this helps!
I've developed ASP.NET Forms for some time and now am trying to learn MVC but it's not making total sense how to get it to do what I want. Perhaps I need to think about things differently. Here is what I'm trying to do with a made up example:
Goal - Use a partial file, which can be placed anywhere on the site which will accept a parameter. That parameter will be used to go to the database and pass back the resulting model to the view. The view will then display one or more of the models properties.
This isn't my code, but shows what I'm trying to do.
File: Controllers/UserController.cs
[ChildActionOnly]
public ActionResult DisplayUserName(string userId)
{
MyDataContext db = new MyDataContext()
var user = (from u in db.Users where u.UserId = userId select u).FirstOrDefault();
return PartialView(user);
}
File: Views/Shared/_DisplayUserName.cs
#model DataLibrary.Models.User
<h2>Your username is: #Model.UserName</h2>
File: Views/About/Index.cshtml
#{
ViewBag.Title = "About";
}
<h2>About</h2>
{Insert Statement Here}
I know at this point I need to render a partial called DisplayUserName, but how does it know which view to use and how do I pass my userId to the partial?
It's what I expect is a very basic question, but I'm yet to find a tutorial which covers this.
Thanks in advance for your help.
You should call Html.Action or Html.RenderAction like:
#Html.Action("DisplayUserName", "User", new {userId = "pass_user_id_from_somewhere"});
Your action should be like:
[ChildActionOnly]
public ActionResult DisplayUserName(string userId)
{
MyDataContext db = new MyDataContext()
var user = (from u in db.Users where u.UserId = userId select u).FirstOrDefault();
return PartialView("_DisplayUserName", user);
}
This should do the trick.
I always make sure to close the MyDataContext... Maybe enclose everything in a using statement... If you notice when VS does it for you they create the entity as a private variable in the Controller Class (outside of the controllers) and then close it with the dispose method... Either way I believe you need to make sure those resources are released to keep things running smooth. I know it's not in the question but I saw that it looked vulnerable.