如何在ASP.NET Core中的自定义TagHelper中呈现Razor模板?

本文介绍了如何在ASP.NET Core中的自定义TagHelper中呈现Razor模板?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在创建自定义HTML标记帮助器:

I am creating a custom HTML Tag Helper:

public class CustomTagHelper : TagHelper { [HtmlAttributeName("asp-for")] public ModelExpression DataModel { get; set; } public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output) { string content = RazorRenderingService.Render("TemplateName", DataModel.Model); output.Content.SetContent(content); } }

如何以编程方式呈现部分视图，以及如何在TagHelper.ProcessAsync中以字符串形式获取呈现的内容? 我应该请求注入IHtmlHelper吗? 有可能获得剃须刀引擎的参考吗?

How to render a partial view programatically an get the rendered content as a string inside TagHelper.ProcessAsync ? Should I request the injection of an IHtmlHelper ? Is it possible to get a reference to the razor engine ?

推荐答案

可以在自定义TagHelper中请求注入IHtmlHelper:

It is possible to request the injection of an IHtmlHelper in the custom TagHelper:

public class CustomTagHelper : TagHelper { private readonly IHtmlHelper html; [HtmlAttributeName("asp-for")] public ModelExpression DataModel { get; set; } [HtmlAttributeNotBound] [ViewContext] public ViewContext ViewContext { get; set; } public CustomTagHelper(IHtmlHelper htmlHelper) { html = htmlHelper; } public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output) { //Contextualize the html helper (html as IViewContextAware).Contextualize(ViewContext); var content = await html.PartialAsync("~/Views/path/to/TemplateName.cshtml", DataModel.Model); output.Content.SetHtmlContent(content); } }

提供的IHtmlHelper实例尚未准备就绪，无法使用，因此有必要将其上下文化，因此需要(html as IViewContextAware).Contextualize(ViewContext);语句.

The IHtmlHelper instance provided is not ready for use and it is necessary to contextualize it, hence the (html as IViewContextAware).Contextualize(ViewContext); statement.

然后可以使用IHtmlHelper.Partial方法来生成模板.

The IHtmlHelper.Partial method can then be used to generate the template.

信贷请 frankabbruzzese 对从标记帮助程序呈现部分模板的功能.