model-binding

问题 I have a strongly typed view of type ProductListingViewModel which in turn contains a ProductViewModel. (both custom view models). I have some form elements on my page and these are created like so: <%: Html.DropDownListFor(m => m.ProductViewModel.CategoryId, Model.Categories)%> which generates the HTML: <select name="ProductViewModel.CategoryId" id="CategoryId"> With the default model binding I expected that when I post to my controller action which accepts a parameter of type

问题 This is my view model: public class TaskViewModel{ public int TaskID{get;set;} public IEnumerable<TaskExecutor> Executors{get;set;} } public class TaskExecutor{ public int ExecutorID{get;set;} public string LastName{get;set;} public string FirstName{get;set;} } In my view I have done something like this: <table> @foreach(var item in Model.Executors) { <tr> <td>item.ExecutorID</td> <td>@string.Format("{0} {1}",item.FirstName,item.LastName)</td> </tr> } </table> Now, when loading the view,

问题 I need to add an empty item in a bounded combobox within wpf mvvm application, I tried this <ComboBox TabIndex="23" Text="{Binding Specialisation}" DisplayMemberPath="refsp_libelle"> <ComboBox.ItemsSource> <CompositeCollection > <ComboBoxItem > </ComboBoxItem> <CollectionContainer Collection="{Binding SpecialisationItemSource}" ></CollectionContainer> </CompositeCollection> </ComboBox.ItemsSource> </ComboBox> It worked before I tried to add the empty item. <ComboBox TabIndex="23" Text="

问题 This really seems like a framework bug. The parameter is in the request's params with correct name but it doesnt always bind to the action parameter. It worked for 6 months, but now this is happening in several action methods across the application. I was able to either close VS or restart computer and that would usually fix it. Lately when i've run into this i couldnt get by it without turning the paramter into a string and then converting to a GUID. Any advice on what to do with this since

问题 I'm trying to figure out model binding in current mvc6 (visual studio 2015 release candidate). This is what my code looks like so far: public class MyObjectModelBinder : IModelBinder { public Task<ModelBindingResult> BindModelAsync(ModelBindingContext bindingContext) { if (bindingContext.ModelType == typeof(MyObject)) { var model = new MyObject(); return Task.FromResult(new ModelBindingResult(model, bindingContext.ModelName, true)); } return Task.FromResult<ModelBindingResult>(null); } } The

问题 According to the seminal Scott Hanselman article on the complexities of the ASP.NET Wire Format for Model Binding to Arrays, Lists, Collections, Dictionaries: We read in the properties by looking for parameterName[index].PropertyName The index must be zero-based and unbroke So this HTML: <input type="text" name= "People[0].FirstName" value="George" /> <input type="text" name= "People[1].FirstName" value="Abraham" /> <input type="text" name= "People[2].FirstName" value="Thomas" /> Which will

问题 Suppose I have a model like this: public class Foo { public List<Bar> Bars { get; set; } public string Comment { get; set; } } public class Bar { public int Baz { get; set; } } And I want a view of Foo that lets users edit Bar items. But with a catch: I want the Bar editing to be handled by a partial view. @model Web.ViewModels.Foo @using(Html.BeginForm()) { @Html.Partial("_EditBars", Model.Bars) @Html.TextAreaFor(m => m.Comment) ... } The _EditBars partial view looks something like: @model

问题 I have a dictionary property called Week: public IDictionary<DayOfWeek, Day> Week { get; private set; } And I'm trying to pass its values off to HiddenFor (Days) @Html.HiddenFor(x => x.Week.Values) It has to be a property of the Model so I can't do x.Week.Values.ToList(); How would I go about passing the Dictionary Values to the Html.HiddenFor ? 回答1: Well since your using HiddenFor , I'm going to assume that you need to rebind the values of the dictionary on form post. To bind a Dictionary to

问题 In my Jquery script I post two doubles using the browser's CultureInfo (en-UK) that uses the . as a fraction separator. My MVC app is running on a server with locale nl-BE using the , as a fraction separator. [AcceptVerbs(HttpVerbs.Post)] public JsonResult GetGridCell(double longitude, double latitude) { var cell = new GridCellViewModel { X = (int)Math.Round(longitude, 0), Y = (int)Math.Round(latitude, 0) }; return Json(cell); } The modelbinding fails because of the parsing issue. I think it

问题 Investigating the new strongly-typed, model-binding approach within ASP.NET 4.5 WebForms: In Scott Hanselman's example of WebForms model binding (amongst others) I've seen the use of a FormView that opens in "Edit" mode, containing a number of DynamicControls e.g. <asp:FormView runat="server" ID="MyForm" ... DefaultMode="Edit"> <EditItemTemplate> <asp:DynamicControl runat="server" ID="Field1" DataField="Field1" Mode="Edit" /> <asp:DynamicControl runat="server" ID="Field2" DataField="Field2"