.NET Core中的WebUtility.HtmlDecode替换

我需要在.NET Core（MVC6）中解码HTML字符。看起来.NET Core没有以前每个人都用于此目的的WebUtility.HtmlDecode函数。.NET Core中是否存在替代品？

这在System.Net.WebUtility类中（自.NET Standard 1.0开始）：

//
// Summary:
//     Provides methods for encoding and decoding URLs when processing Web requests.
public static class WebUtility
{
    public static string HtmlDecode(string value);
    public static string HtmlEncode(string value);
    public static string UrlDecode(string encodedValue);
    public static byte[] UrlDecodeToBytes(byte[] encodedValue, int offset, int count);
    public static string UrlEncode(string value);
    public static byte[] UrlEncodeToBytes(byte[] value, int offset, int count);
}

这是在Net Core 2.0中

using System.Text.Encodings.Web;

并称之为：

$"Please confirm your account by <a href='{HtmlEncoder.Default.Encode(link)}'>clicking here</a>.");

更新：同样在.Net Core 2.1中：

using System.Web;

HttpUtility.UrlEncode(code)
HttpUtility.UrlDecode(code)

我发现WebUtility库中的HtmlDecode函数可以正常工作。

System.Net.WebUtility.HtmlDecode(string)

您需要添加参考System.Net.WebUtility。

• 它已经包含在.Net Core 2（Microsoft.AspNetCore.All）中

• 或者，您可以从NuGet预览版安装.Net Core 1。

因此，示例，您的代码将如下所示

public static string HtmlDecode(this string value)
{
     value = System.Net.WebUtility.HtmlDecode(value);
     return value;
}

namespace System.Web
{
    //
    // Summary:
    //     Provides methods for encoding and decoding URLs when processing Web requests.
    //     This class cannot be inherited.
    public sealed class HttpUtility
    {
        public HttpUtility();
        public static string HtmlAttributeEncode(string s);
        public static void HtmlAttributeEncode(string s, TextWriter output); 
        public static string HtmlDecode(string s);
        public static void HtmlDecode(string s, TextWriter output);
        public static string HtmlEncode(string s);
        public static string HtmlEncode(object value);
        public static void HtmlEncode(string s, TextWriter output);
        public static string JavaScriptStringEncode(string value);
        public static string JavaScriptStringEncode(string value, bool addDoubleQuotes);
        public static NameValueCollection ParseQueryString(string query);
        public static NameValueCollection ParseQueryString(string query, Encoding encoding);
        public static string UrlDecode(string str, Encoding e);
        public static string UrlDecode(byte[] bytes, int offset, int count, Encoding e);
        public static string UrlDecode(string str);
        public static string UrlDecode(byte[] bytes, Encoding e);
        public static byte[] UrlDecodeToBytes(byte[] bytes, int offset, int count);
        public static byte[] UrlDecodeToBytes(string str, Encoding e);
        public static byte[] UrlDecodeToBytes(byte[] bytes);
        public static byte[] UrlDecodeToBytes(string str);
        public static string UrlEncode(string str);
        public static string UrlEncode(string str, Encoding e);
        public static string UrlEncode(byte[] bytes);
        public static string UrlEncode(byte[] bytes, int offset, int count);
        public static byte[] UrlEncodeToBytes(string str);
        public static byte[] UrlEncodeToBytes(byte[] bytes);
        public static byte[] UrlEncodeToBytes(string str, Encoding e);
        public static byte[] UrlEncodeToBytes(byte[] bytes, int offset, int count);
        [Obsolete("This method produces non-standards-compliant output and has interoperability issues. The preferred alternative is UrlEncode(String).")]
        public static string UrlEncodeUnicode(string str);
        [Obsolete("This method produces non-standards-compliant output and has interoperability issues. The preferred alternative is UrlEncodeToBytes(String).")]
        public static byte[] UrlEncodeUnicodeToBytes(string str);
        public static string UrlPathEncode(string str);
    }
}

您可以使用HttpUtility class in.net core进行解码或编码。

希望它能工作。

HtmlDecode而且大多数*Decode方法都没有移植到CoreFx。仅*Encode方法可用。

这是今天可用的东西：https : //github.com/dotnet/corefx/blob/1dfe38aeb2811fbbd6d4de36d210f060e80d50a6/src/System.Text.Encodings.Web/src/System/Text/Encodings/Web/HtmlEncoder.cs