我怎样才能渲染我保存的 html 文件而不是显示原始的 html？

Question

我有 html 个文件保存在 Web API 应用程序的 App_Data 文件夹中。配套客户端 (Winforms) 应用程序发送一封带有 link 的电子邮件，允许用户单击 link 并在浏览器中查看这些 html 文件，如下所示：

// Client Winforms app code
internal static bool EmailGeneratedReports(string emailAddr)
{
    bool success = true;
    try
    {
        Microsoft.Office.Interop.Outlook.Application app = new Microsoft.Office.Interop.Outlook.Application();
        MailItem mailItem = app.CreateItem(OlItemType.olMailItem);
        mailItem.Subject = String.Format("duckbillP Reports generated {0}", GetYYYYMMDDHHMM());
        mailItem.To = emailAddr;
        string rptLinks = String.Format("<a href=\"{0}/api/{1}/{2}/{3}\" target=\"_blank\">Price Compliance Report Online</a>", ReportRunnerConstsAndUtils.SERVER_BASE_ADDRESS, "Platypus", "gramps", "201507"); // hardcoding year and month for now
        mailItem.HTMLBody = String.Format("<html><body><p>Your duckbillP reports are attached. You can also view them online here:</p>{0}</body></html>", rptLinks);
        FileInfo[] rptsToEmail = GetLastReportsGenerated();
        foreach (var file in rptsToEmail)
        {
            mailItem.Attachments.Add(String.Format("{0}\{1}", uniqueFolder, file.Name));                  
        }
        mailItem.Importance = OlImportance.olImportanceHigh;
        mailItem.Display(false);
    }
    catch (System.Exception sysex)
    {
        String sysexDetail = String.Format(ReportRunnerConstsAndUtils.ExceptionFormatString, sysex.Message,
            Environment.NewLine, sysex.Source, sysex.StackTrace);
        MessageBox.Show(sysexDetail);
        success = false;
    }
    return success;
}

Web API 应用程序中的获取代码运行良好；这是单击 link 时调用的内容：

// Web API (server) Controller code
[Route("{unit}/{begindate}")]
public string Get(string unit, string begindate)
{
    string _unit = unit;
    string _begindate = String.Format("{0}01", PlatypusWebReportsConstsAndUtils.HyphenizeYYYYMM(begindate));
    string appDataFolder = HttpContext.Current.Server.MapPath("~/App_Data/");

    string htmlSummaryFilename = string.Format("platypusSummary_{0}_{1}.html", _unit, _begindate);
    string fullSummaryPath = Path.Combine(appDataFolder, htmlSummaryFilename);

    string htmlDetailFilename = string.Format("platypusDetail_{0}_{1}.html", _unit, _begindate);
    string fullDetailPath = Path.Combine(appDataFolder, htmlDetailFilename);

    String summaryHtmlFromFile = File.ReadAllText(fullSummaryPath);
    String detailHtmlFromFile = File.ReadAllText(fullDetailPath);
    return String.Format("{0}<br/><br/>{1}", summaryHtmlFromFile, detailHtmlFromFile);
}

我希望返回的 html 会以正常方式在浏览器中呈现，但它只显示原始的 html（包括所有尖括号和 html 关键字等）。 IOW，如果我在记事本而不是浏览器中查看 HTML，它就会出现。

我怎样才能确保 GET 方法返回的 HTML 按预期显示？

明确地说，我不希望用户看到这样的内容：

<h1>This is heading 1 (Candara)</h1>
<h2>This is heading 2 (Georgia)</h2>
<h3>This is heading 3 (Tahoma)</h3>
<p class="candara">This is a Candara 1.1em paragraph</p>
<p class="segoe">This is a Segoe UI paragraph</p>
<p class="tahoma">This is a Tahoma paragraph</p>
<p class="georgia">This is a Georgia 1.1em paragraph</p>

...而是呈现的 HTML 是这样的：

Answer 1

您应该告诉浏览器您正在发送 HTML 内容。这样的事情应该有效：

// Send an HTTP message instead of a string.
public HttpResponseMessage Get(string unit, string begindate)
{
    // Here you process the data...

    return new HttpResponseMessage()
    {
        Content = new StringContent(
            String.Format("{0}<br/><br/>{1}", summaryHtmlFromFile, detailHtmlFromFile), 
            Encoding.UTF8, 
            "text/html"
        )
    };
}

我怎样才能渲染我保存的 html 文件而不是显示原始的 html？

How can I get my saved html file to be rendered rather than displaying the raw html?

html

c#

html-rendering

webpage-rendering

asp.net-web-api