I have a url like this:
http://localhost/products/AddFeature?code=SMW
in the controller action, I create a model and set the
model.Code = "123112".
The View has this
#Html.EditorFor(model => model.Code)
the final rendered html always shows "SMW" as the value.
Is this a bug where the query string value overrides the assigned value ?
Does anyone got same results or I need some coffee ?
Clear the model state before returning your view. Be sure that you haven't missed some model error before you do that. The helpers use the ModelState, then the models for their values.
ModelState.Clear();
Related
I have a partial view that allows Html and the rendered name attribute of the <textarea> is throwing everything off, for instance this is my text area
#Html.TextAreaFor(model => model.cars.mycars)
causes the attribute to render as name="cars.mycars", is there anyway to change that to cars_mycars without using #Name ?
The reason why I want cars_mycars is because it is a field that has AllowHtml in it in the model
[AllowHtml]
public string mycars { get; set; }
In order for AllowHtml to work I would need a strongly typed model such as #Html.TextAreaFor(model => model.mycars) but I am using multiple models in 1 view therefore I have
#Html.TextAreaFor(model => model.cars.mycars, #new{id="cars_mycars",#Name="cars_mycars"})
This is all in a partialview and when I try to submit it nothing happens at all. That is the only field in the form so the issue much lie there and in addition if I put
ValidateInput(False)
on the action method then everything works fine which leads me back to the #name convention not working .
You can try like this
#Html.TextArea("cars_mycars")
Having a bit of trouble figuring something out.
I've got an Action:
public ActionResult FareTypeSelector(SearchTypes searchType, SearchSource searchSource)
{
IFareTypeOptionsRepository fareTypeOptionRespoitory = new FareTypeOptionsRepository();
FareTypeOptions fareTypeOptions = fareTypeOptionRespoitory.GetFareTypeOptions(searchSource, searchType, _authentication.UserLoggedIn.CallCentreUser, _authentication.UserLoggedIn.AgencyProfile.BranchCode);
return View();
}
I've created an 'Editor', i.e. a file in EditorTemplates called FareTypeSelector.cshtml.
I want to bind my editor to a property of the model of the page that contains the editor. But I also want to pass some parameters into my action, i.e. (SearchTypes searchType, SearchSource searchSource). The idea being that the data displayed in the editor is based on this information passed in. Now I can't quite figure out if:
Is this possible?
whats the markup needed in the main view to render
this, pass the parameters and bind the resulting selected value into the main model?
Ta in advance
EditorTemplates are used for Data items from your model, not Action methods. They're using only in your view to render a specific model (or member of a model)
I am using a DropDownListFor like this:
#Html.DropDownListFor(model => model.SelectedOrganisationValue, new SelectList(Model.OrganisationList, "Value", "Text"))
And I am also using:
[Required]
As Attribute in the View.
So when I PostBack the View to the Server and the Required Attribute will fail, the View is showed again, but then Model is null. So I will get a NullReferenceException in Model.OrganisationList.
That is the default behaviour. As you know ,MVC does not rely on ViewState, It can not keep the content inside the drop down across Postbacks (generic term). You need to repopulate it again in the ActionMethod.
Suppose this view :
#Html.HiddenFor(model => model.Batiment.Client.Id)
#Html.LabelFor(model => model.Batiment.Code)</td>
#Html.EditorFor(model => model.Batiment.Code)</td>
<br>
#Html.LabelFor(model => model.Batiment.Nom)</td>
#Html.EditorFor(model => model.Batiment.Nom)</td>
When I submit my form on the controler the ModelState is invalid for the property "Nom" required into my class Client. Is true, the metadata in my class Client is set to required but I dont include this field into my view...! Why Mvc raise this error?
Can I hide a field (like Id) without specify all the required field into my view?
Errors enter model state during binding, therefore you could exclude your property from binding by including the following in your action method signature:
public ActionResult Register([Bind(Exclude="PropertyName")] UserViewModel user)
{
// Your logic here
}
This should exclude PropertyName from binding, therefore error won't enter your model state and your validation should succeed. Just to add, I think that this is more of a hack, rathern then solution. If you need only a part of your view model, than this view model should not be used and you should really consider creating a new view model without this property.
It might look very similar and it might seem like duplicate code, but it isn't. It promotes seperation of concerns and you should see the benefit of doing this in the near future when it comes to extending/modifying your application.
No, the validation is done on the model, not the view, why it is called 'model state'
You need to create another view for this scenario. This is exactly what ViewModels are for.
Then you can use a tool like AutoMapper to easily to copy the properties between this view model to your base model.
i have been playing around with MVC. I am currently stumped on with html helper methods. One thing i have noticed is that I cant really cant apply the ASP.NET Web Form logic into MVC. To explain further, in ASP.NET I could create a Label control and assign it some text data and then read the text data.
However, in MVC, I cant seem to do the same with #Html.LabelFor/#Html.Label, I have realised that once you do a POST from your form, the value from the Label is not bound back into my view model. However, if I use an EditorFor or TextBoxFor, I can get values bound to my viewmodel upon POST.
My question what html hlper method should I use to display text as readonly but yet be able to bind back to my viewmodel upon post ? I have tried TextBoxFor with its html attributes set to disabled and readonly but no luck.
Appreciate any pointers.
thanks
You should be able to bind the readonly attribute to the TextBox by passing in htmlAttributes as the 2nd parameter of the TextBoxFor method:
<%=Html.TextBoxFor(m => m.SomeProperty, new { #readonly = "readonly" }) %>
On MSDN: InputExtensions.TextBoxFor Method (HtmlHelper, Expression>, Object)
If you're trying to maintain the Label value you can use a combination of the LabelFor and HiddenFor methods.
I don't know why you would need to do this though, since you should be able to get the DisplayText attribute or the Property Name from the property.
<%=Html.LabelFor(m => m.SomeProperty) %>
<%=Html.HiddenFor(m => m.SomeProperty) %>
but this doesn't make a lot of sense since the usual syntax would be:
<%=Html.LabelFor(m => m.SomeProperty) %>
<%=Html.TextBoxFor(m => m.SomeProperty) %>
Note that if you use the disabled attribute the input will not be posted when the form is submitted
This is expected behaviour, only values form elements are added to your Model on POST so your label will be ignored. To get around this duplicate your label value in a hidden field
Html.HiddenFor(model => model.FieldName)
or
Html.Hidden("FieldName", model.FieldName)