asp.net-core-tag-helpers

问题 Hello this is my tag helper [HtmlTargetElement("card")] public class CardTagHelper : TagHelper { public string Title { get; set; } public string Icon { get; set; } public string Url { get; set; } public override void Process(TagHelperContext context, TagHelperOutput output) { output.TagName = "CardTagHelper"; output.TagMode = TagMode.StartTagAndEndTag; var preContent = new StringBuilder(); preContent.AppendFormat($@" <div class='card custom-card'> <div class='card-header'> <div class='card

问题 I'm wrestling with understanding how to show the string assigned to Attributes in the HtmlTargetElement class attribute works. I have a couple questions that I think will highlight my issue and understanding. Let's say we want activate an Html Element only when make starts with gm and there is any model. I think there is a way to do this with a single class attribute (not multiple ones). I'm trying the following but it is just a SWAG and does not work. I'd appreciate tips so I can understand

问题 This is a follow up question to this question, which seems to be for an older ASP.NET Core version (I'm using 2.1). I'm trying to call a TagHelper manually from within a TagHelper. Applying the Answer in the linked question above, the TagHelper.Process looks like so: public override async void Process(TagHelperContext context, TagHelperOutput output) { var anchorTagHelper = new AnchorTagHelper { Action = "Home", }; var anchorOutput = new TagHelperOutput("a", new TagHelperAttributeList(),

问题 In past versions of Visual Studio 2017 if a developer wanted to have tag helper intellisense they needed to install Razor Language Services as indicated in this SO answer: ASP.NET Core Tag Helper Intellisense in Visual Studio 2017 In prior versions of VS 2017 I did this and it worked great. Recently I upgraded to Visual Studio 2017 version 15.3.2 from version 15.2 I believe and now my tag helper intellisense is no longer working. I read here https://developercommunity.visualstudio.com/content

问题 My link tag helpers are no longer working properly after migrating to asp.net core 2.2. <a class="btn btn-outline-primary" asp-controller="MyController" asp-action="MyAction" asp-route-id="@Id">Link</a> This works fine when I set the compatibility version to 2.1, but produces an empty href when set to compatibility version 2.2. <a class="btn btn-outline-primary" href="">Link</a> I followed the steps Migrate from ASP.NET Core 2.1 to 2.2 .SetCompatibilityVersion(CompatibilityVersion.Version_2_1

问题 In an ASP.NET Core 2.0 application, I have a Foo class with a lot of classical string or numeric members and also a int? Budget field. using Microsoft.AspNetCore.Http; using System; using System.Collections.Generic; using System.ComponentModel.DataAnnotations; namespace MyProj.ViewModels { public class RecordEditViewModel { public RecordEditViewModel() { } public string Name { get; set; } public string Prop1 { get; set; } public string Prop2 { get; set; } public string Prop3 { get; set; }

问题 Is it possible in ASP.Net Core to automatically convert camel case property names in view models to insert spaces into the corresponding labels when using tag helpers? If my view model looks like this... [Display(Name = "First Name")] public string FirstName { get; set; } [Display(Name = "Last Name")] public string LastName { get; set; } [Display(Name = "Referral Date")] public DateTime ReferralDate { get; set; } It seems like a lot of extra configuration applying data annotations such as

问题 I want to combine an input tag helper with razor code to set an attribute but I cannot get the two technologies to work together. I am simply trying to set the disabled attribute on the input field based on the value of view model property. When i put the razor code after the asp-for tag the razor intellisense is not recognized and the field is not disabled as expected... <input asp-for="OtherDrugs" @((Model.OtherDrugs == null) ? "disabled" : "") class="form-control" /> Rendered output...

问题 I understand what the asp-fallback-* tag helpers do. What I don't understand is how. For example: <link rel="stylesheet" href="//ajax.aspnetcdn.com/ajax/bootstrap/3.3.5/css/bootstrap.min.css" asp-fallback-href="~/lib/bootstrap/dist/css/bootstrap.min.css" asp-fallback-test-class="sr-only" asp-fallback-test-property="position" asp-fallback-test-value="absolute" /> This loads bootstrap from the CDN, and loads the local copy if the CDN is down. But how does it decide to do that? I assume it

问题 I am working on an ASPNet Core 2.1 MVC website and I am trying to get a select list to populate with a list of Companies (value = Id, text = CompanyName). I can see that the data exists in the List in the ViewModel but no matter what I try, I can't get the data to show in the dropdown list in the view. I am following the first variation of the SelectList recommendation from this SO post Here is my EditSite ViewModel class public class EditSite { public int Id { get; set; } [Required]