使用asp-for作为参数的自定义ViewComponent

我想包装这个:

 

如果要将ModelExpression传递给基础ViewComponent,然后将其传递给TagHelper,则必须使用@TheModelExpression.Model执行此操作:

  @model Microsoft.AspNetCore.Mvc.ViewFeatures.ModelExpression  

正如@JoelHarkes所提到的,在这种特殊情况下,自定义taghelper可能更合适。 无论如何,我仍然可以在TagHelper中渲染PartialView ala Template:

 [HtmlTargetElement("editor", Attributes = "asp-for", TagStructure = TagStructure.WithoutEndTag)] public class EditorTagHelper : TagHelper { private HtmlHelper _htmlHelper; private HtmlEncoder _htmlEncoder; public EditorTagHelper(IHtmlHelper htmlHelper, HtmlEncoder htmlEncoder) { _htmlHelper = htmlHelper as HtmlHelper; _htmlEncoder = htmlEncoder; } [HtmlAttributeName("asp-for")] public ModelExpression For { get; set; } [ViewContext] public ViewContext ViewContext { set => _htmlHelper.Contextualize(value); } public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output) { output.TagName = null; var partial = await _htmlHelper.PartialAsync("TagHelpers/Editor", For); var writer = new StringWriter(); partial.WriteTo(writer, _htmlEncoder); output.Content.SetHtmlContent(writer.ToString()); } } 

然后.cshtml模板看起来与viewcomponent完全一样。

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