I have a strongly-typed partial view whose model contains a property with the same name as the parent page's view model. For some reason the rendering engine is rendering the parent view model value, not the expected value (well, the value I expect at least!)
Parent page view model extract:
public class ParentPageViewModel
{
public int Id { get; set; } // problem property
...
public IEnumerable<ChildViewModel> Children { get; set; }
}
Child page view model extract:
public class ChildViewModel
{
public int Id { get; set; } // problem property
...
}
Parent page extract (Razor):
#model ParentPageViewModel
...
#foreach (var item in Model.Children)
{
#Html.Partial("MyPartialView", item)
}
...
Partial view extract:
#model ChildViewModel
...
<form ...>
#Html.HiddenFor(m => m.Id) // problem here - get ParentPageViewModel.ID not ChildViewModel.Id
</form>
...
So basically in my rendered output, my hidden field has the value of the parent view model element, NOT the value passed to the partial view. It's definitely being caused by the name, as changing the name of #ChildViewModel.Id# to something like #ChildViewModel.ChildId# makes it work as expected. Interestingly, when inspecting the view model values in the debugger I do see the correct values; it's only the rendered output that's wrong.
Is there a way round this or 'correct' way of doing what I'm trying to do (I'm rendering mini forms in a table for ajax validation/posting of updates to table rows)
Thanks,
Tim
I think changing your call to this will solve the problem:
#Html.Partial("MyPartialView", item, new ViewDataDictionary())
The child view is picking up the value from the ViewData dictionary - so this passes in a new dictionary to the child view (hattip danludwig).
Found a solution, just manually creating the hidden field, e.g.:
<input type="hidden" name="Id" value="#Model.Id" />
instead of using Html.HiddenFor.
(I won't mark this as answered for a while in case there are any other solutions or anyone can explain the problem)
I know this an old post. But I figured since I landed here when I was facing the same problem, I might as well contribute.
My issue was a little different. In my case, the main view's Id was incorrect after a partial view action that required the whole page/view to be refreshed was triggered. I solved the problem with ModelState.Clear
ModelState.Clear();
return View("MyPartialView", model); //call main view from partial view action
Create a file named ChildViewModel.cshtml in Views/Shared/EditorTemplates. Put your partial view into that file:
in ~/Views/Shared/EditorTemplates/ChildViewModel.cshtml
#model ChildViewModel
...
<form ...>
#Html.HiddenFor(m => m.Id)
</form>
...
Then, render it like this:
#model ParentPageViewModel
...
#foreach (var item in Model.Children)
{
#Html.EditorFor(m => item)
}
...
Or, if you'd rather keep the view as a partial and not as an editor template, use Simon's answer.
Related
This question already has answers here:
getting the values from a nested complex object that is passed to a partial view
(4 answers)
Closed 6 years ago.
This question has been asked but none could solve my problem.
The problem is missing or null data from the partial view is not submittied (POST) along with the main view data.
I have a typed partial view called _Address.cshtml that I include in another view called Site.cshtml.
The typed site view binds to a view model called SiteEditModel.cs
public class SiteEditModel
{
...properties
public AddressEditModel Address {get;set;}
public SiteEditModel()
{
Address = new AddressEditModel();
}
}
The Site view has a form:
#model Insight.Pos.Web.Models.SiteEditModel
...
#using ( Html.BeginForm( "Edit", "Site", FormMethod.Post ) )
{
#Html.HiddenFor( m => m.SiteId )
...
#Html.Partial( "~/Views/Shared/Address.cshtml", this.Model.Address )
...
#Html.SaveChangesButton()
}
The partial Address view is just a bunch of #Html... calls that bind to the Address model.
#model Insight.Pos.Web.Models.AddressEditModel
#{
Layout = null;
}
<div>
#Html.HiddenFor(...)
#Html.HiddenFor(...)
#Html.HiddenFor(...)
#hmtl.LabelFor(...)
</div>
In the controller action Edit I can see the SiteEditModel is populated correctly, the Address property of that model is not.
Where do I go wrong?
Thank you so much.
http://davybrion.com/blog/2011/01/prefixing-input-elements-of-partial-views-with-asp-net-mvc/
#Html.Partial("~/Views/Shared/_Address.cshtml", Model.Address, new ViewDataDictionary
{
TemplateInfo = new System.Web.Mvc.TemplateInfo { HtmlFieldPrefix = "Address" }
})
The key to fix this is with naming of the partialviews input-elements. The Render partial dont know it's a part of something bigger.
I've make an simple example on how you can fix this in a way that you can have multiple Addresses using the same partial view:
public static class HtmlHelperExtensions
{
public static MvcHtmlString PartialWithPrefix(this HtmlHelper html, string partialViewName, object model, string prefix)
{
var viewData = new ViewDataDictionary(html.ViewData)
{
TemplateInfo = new TemplateInfo
{
HtmlFieldPrefix = prefix
}
};
return html.Partial(partialViewName, model, viewData);
}
}
And use this extensions in the view like this:
#using (Html.BeginForm("Edit", "Site", FormMethod.Post))
{
#Html.HiddenFor(m => m.SiteId)
#Html.PartialWithPrefix("_Adress", this.Model.Address, "Address")
<input type="submit" />
}
You can of course make this a bit more fancy with expressions and reflection but that's another question ;-)
Your SiteEditModel Address property is not marked as public, change it to this instead:
public AddressEditModel Address {get;set;}
I would also change your partial to use SiteEditModel instead:
#model Insight.Pos.Web.Models.SiteEditModel
#{
Layout = null;
}
<div>
#Html.HiddenFor(m => m.Address.FooProperty)
...
</div>
This would mean that your properties would end up being named correctly in order for the model binder to pick them up.
Using the above example it would be Name"=Address.FooProperty".
As I remember correctly, the problem is that Html.Partial doesn't populate inputs names correctly. You should have something like:
<input id="Address.Street" name="Address.Street" />
but I assume you have following HTML:
<input id="Street" name="Street" />
You have few solutions:
Insert input name manually:
#Html.HiddenFor(x => x.Street, new { Name = "Address.Street" })
Use Html.EditorFor()
Override names resolving in Html.Partial()
The downside of first solution is that you are hardcoding property name, what isn't ideal. I'd recommend using Html.EditorFor() or Html.DisplayFor() helpers, cause they populate inputs names correctly.
Model binder could not bind child models correctly if you are populating them in partial view. Consider using editor templates instead which is implemented for this reason.
Put your AddressEditModel.cshtml file in \Views\Shared\EditorTemplates\ folder and in your main view use like this:
#using ( Html.BeginForm( "Edit", "Site", FormMethod.Post ) )
{
// because model type name same as template name MVC automatically picks our template
#Html.EditorFor(model=>model.Address)
// or if names do not match set template name explicitly
#Html.EditorFor(model=>model.Address,"NameOfTemplate")
}
I am using nested view models to display views based on user roles.
Model:
public class MainVM {
//some properties
public OneVM One {get; set;}
public TwoVM Two {get; set;}
}
public class OneVM {
//properties
}
public class TwoVM {
//properties
}
As written here that only main model is need to be sent controller. I am using Automapper to map properties from received model.
Controller:
public ActionResult EditAction(MainVM model){
var item = db.Table.Find(model.Id);
//automapper to map
AutoMapper.Mapper.Map(model.One, item); //does not work
db.Entry(item).State = EntityState.Modified;
db.SaveChanges();
}
Is this the right way to do that? What am I doing wrong here.
Update:
This was the view I was using to render nested view models from partial views
View:
#model MainVM
#Html.RenderPartial("_OnePartial", Model.One)
This answer https://stackoverflow.com/a/6292180/342095 defines an Html helper which will generate the partial view with right names.
The value of property One will be empty because you are passing an instance of OneVM to the partial (not the main model) so the form controls are not correctly named with the prefix (which need to be name="One.SomeProperty").
You have included a link to a PartialFor() helper (which works) but don't use it. In the main view it needs to be
#Html.PartialFor(m => m.One, "_OnePartial")
Which is the equivalent of
#Html.Partial("_OnePartial", Model.One,
new ViewDataDictionary { TemplateInfo = new TemplateInfo { HtmlFieldPrefix = "One" }})
The problem probably lies in your HTML. If a model is nested, then the input fields of properties should be like this:
<input type="text" name="SubModel.PropertyName" />
Using HTML helpers, it would look something like this:
#Html.EditorFor(model => model.SubModel.PropertyName)
The ASP.NET MVC Action cannot know, that you want to fill your submodel if it's not in your HTML.
I have a problem concerning Partial views in MVC Razor. Any help is highly appreciated, it's most likely something I've missed, but I could find nothing while searching that had the same problem replicated.
So I'm binding my view to a view model.
public class Person
{
public string Name { get; set; }
public virtual ContactInformation ContactInformation { get; set; }
}
And then I have a view with a partial to render the contact information model.
<div>
#Model.Name
</div>
<div>
#Html.Partial("_ContactInformation", Model.ContactInformation)
</div>
However, the "_ContactInformation" view is rendered without ContactInformation in the nameattribute of the <input>s
Usually razor binds the name attribute to something like: name="ContactInformation.Address". But since it's a partial it gets rendered as name="Address".
Am I missing something or is this the intended way for it to work?
You have two options. Option 1 - specify the prefix explicitly:
#Html.Partial("_ContactInformation", Model.ContactInformation, new ViewDataDictionary
{
TemplateInfo = new System.Web.Mvc.TemplateInfo { HtmlFieldPrefix = "ContactInformation" }
})
Options 2 is to turn partial view into an editor template for your model and than use EditorFor helper method, that should be able to add prefixes for you:
#Html.EditorFor(m => m.ContactInformation)
view:
#model
#using (Html.BeginForm("action", "Controller"))
{
#html.action("action1","controller1") //use model1
#html.action("action2","controller2") //use model2
#html.action("action3","controller3") //use model3
<button type="submit">submit</button>
}
Parent Model
{
public model model1{get; set;}
public model model2{get; set;}
public model model3{get; set;}
}
controller
[httppost]
public ActionResult Submit(parentmodel abc)
{
}
So my question is when I post the data the parentmodel is return as null but when I try as
[httppost]
public ActionResult Submit(model1 abc)
{
}
I get the form values in model1. Is my approach right? What should be done to get the form values in the parent model?
First of all always mention your model at top.
#model MyMVCModels
#Html.TextBoxFor(m => m.Model1.Name)
Here is the beauty, Model 1 value has to be appropriate while you are setting in your textboxes or controls.
Also the structuring of your Model's might not also be correct.
It's really hard to tell what you're trying to do from your question, but if I understand it correctly, you want to pass your form values to three separate partials simultaneously?
If that's the case, I'd recommend skipping the form postback and just make three ajax calls to load the partials when you click the submit button.
Lets say I have a partial view that contains both a checkbox and a numerical value.
I have a ViewModel that contains a Model -- Terms -- that implements the partial view. When I submit it, the modifications made in the Terms Partial View does not reflect to the Terms property of ViewModel. I'm probably misunderstanding a concept or another on how it works, anyone care to point it out please?
View
#model ViewModel
#using (Html.BeginForm("ViewAction", "ViewController", FormMethod.Post))
{
// Other ViewModel Property Editors
#Html.Partial("Terms", Model.Terms)
<input type="submit" value="Submit" />
}
Partial View
#model Terms
#Html.CheckBoxFor(m => m.IsAccepted)
#Html.EditorFor(m => m.NumericalValue)
Controller
[AcceptVerbs(HttpVerbs.Get)]
public ActionResult ViewAction(int id)
{
ViewModel vm = GetVmValues();
return View(vm);
}
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult ViewAction(ViewModel vm)
{
// Access ViewModel properties
}
The default model binder expects the control ids for your Terms model to be named Terms.IsAccepted and Terms.NumericalValue. You need to create an editor template for your Terms model and then call #Html.EditorFor(m=> m.Terms) instead of using a partial.
You can read more about editor templates here. Its from MVC 2, but should still be relevant.
Change the model type of your Partial View to 'ViewModel' instead of 'Terms'.
Here is the updated code:
View:
#model ViewModel
#using (Html.BeginForm("ViewAction", "ViewController", FormMethod.Post))
{
// Other ViewModel Property Editors
#Html.Partial("Terms", Model) //Set parent 'ViewModel' as model of the partial view
<input type="submit" value="Submit" />
}
Partial View:
#model ViewModel
#Html.CheckBoxFor(m => m.Terms.IsAccepted)
#Html.EditorFor(m => m.Terms.NumericalValue)
The generated Html will be:
<input id="Terms_IsAccepted" name="Terms.IsAccepted" type="checkbox" value="true">
While the DefaultModelBinder map values from value providers (e.g. form data/route data/query-stirng/http file) to a complex object, it searches values having the name as the properties of the object. In your case, to build the 'Terms' child object of your 'ViewModel', it will search for values with the names like 'Terms.IsAccepted', 'Terms.NumericalValue' etc.
The Html helper uses the property path expression to generate the html element's name, that is why you have to use the parent ViewModel as model of the partial view.
Hope this helps...