model-binding

问题 Is there any way to set Data Annotation messages using formatted string instead of direct constant, I need to set required field ErrorMessage like in following code, but it gives me an error. [Required(ErrorMessage = string.Format(SystemMessages.Required, "First Name"))] public string FirstName { get; set; } SystemMessages is a constant file and it has following code, public const string Required = "{0} is required."; Is there any way to set attributes like this? 回答1: string.Format result is

问题 Is there any way to set Data Annotation messages using formatted string instead of direct constant, I need to set required field ErrorMessage like in following code, but it gives me an error. [Required(ErrorMessage = string.Format(SystemMessages.Required, "First Name"))] public string FirstName { get; set; } SystemMessages is a constant file and it has following code, public const string Required = "{0} is required."; Is there any way to set attributes like this? 回答1: string.Format result is

问题 I have a variable name CountryId (Integer Type). If user provides a string or any random input to CountryId , the In-built DefaultBindingModel in ASP.Net throws an error : The value '<script>gghghg</script>' is not valid for CountryId. I want to override this message and provide my own text if the ModelState fails. I want a generic solution. I've searched and tried many solutions, but they only worked for MVC applications, not webAPI . public class IntegerModelBinder : DefaultModelBinder {

问题 I have a variable name CountryId (Integer Type). If user provides a string or any random input to CountryId , the In-built DefaultBindingModel in ASP.Net throws an error : The value '<script>gghghg</script>' is not valid for CountryId. I want to override this message and provide my own text if the ModelState fails. I want a generic solution. I've searched and tried many solutions, but they only worked for MVC applications, not webAPI . public class IntegerModelBinder : DefaultModelBinder {

问题 I'm trying to work out how to model bind a collection to a model property within asp.net core. I understand that the way this can be done is to include fields as so: <input type="hidden" asp-for="items[0].Id" /> <input type="hidden" asp-for="items[0].Name" /> <input type="hidden" asp-for="items[1].Id" /> <input type="hidden" asp-for="items[1].Name" /> However what do you do if you want to allow the user to add additional items and/or remove others. In this case I am adding these items client

问题 Is there possible to map a model (server side) into JS object? The problem is that I can not return a json object from the server side. View.cshtml: @model TestModel <script type="text/javascript"> jQuery(function ($) { var jsObject = { Property1: @Model.Property1, Property2: @Model.Property2, Property3: @Model.Property3, ... }; }); </script> Thanks! 回答1: You can use Json.Encode Method converts a data object to a string that is in the JavaScript Object Notation (JSON) format. var jsObject =

问题 I am using 2 kendo date pickers in my application as such: <div class="span12"> <div class="span2" style="text-align: right"> Start Date: </div> <div class="span2"> @(Html.Kendo().DatePickerFor(m=>m.StartDate)) </div> <div class="span2" style="text-align: right"> End Date: </div> <div class="span2"> @(Html.Kendo().DatePickerFor(m=>m.EndDate)) </div> <div class="span4"> <button class="btn btn-primary" onclick="getGraphData()">Show</button> </div> </div> When the button is clicked, I read the

问题 I need to customize model binding for a particular class Foo that involves extending the normal binding logic with some additional post-processing (e.g., conditionally set null collection fields to an empty collection). I want to add this logic to model binding so that the results are available to action filters, etc. The most direct approach would be to derive from ComplexTypeModelBinder and override BindModelAsync . However, that method is unfortunately not virtual. Composition is the next

问题 I am trying to use a custom model binder in MVC that I want resolved from my IoC container. The issue I am having is that I can't access my container while I am adding the MVC service, because my container isn't built yet (and I need to add MVC before building my container). Feels like a chicken/egg issue, and I am sure I am missing a simple solution. Example: services.AddMvc().AddMvcOptions(options => { options.ModelBinders.Add(serviceProvider.Resolve<CustomModelBinder>()); }); My custom

问题 I have different kinds of elements - textboxes, selects, checkboxes and radio buttons on my view. When I present this strongly typed view with the model there are some elements that get populated with corresponding model values but there are certain kinds and ones that don't. Radio buttons, checkboxes are blank. When it comes to select elements, if they are created with @Html.DropDownListFor helper method then they get correct values, but if they are just plain Html selects with their names