如何使System.Uri不在路径中转换%2f(斜杠)？

Question

System.Uri构造函数坚持将%2f序列转义为foward斜杠,当它在URL的路径部分中看到它们时.我怎么能避免这种行为？

我已经看到了这个thig上的Connect票证,但据我所知,解决办法对.net 4不起作用.

Answer 1

它在内部保留原始字符串,例如,以下代码:

    Uri u = new Uri("http://www.example.com/path?var=value%2fvalue");
    Console.WriteLine(u.OriginalString);

会显示

http://www.example.com/path?var=value%2fvalue

编辑:我已更新最近.NET版本的Connect Link Workaround中的代码.这里是:

// System.UriSyntaxFlags is internal, so let's duplicate the flag privately
private const int UnEscapeDotsAndSlashes = 0x2000000;
private const int SimpleUserSyntax = 0x20000;

public static void LeaveDotsAndSlashesEscaped(Uri uri)
{
    if (uri == null)
        throw new ArgumentNullException("uri");

    FieldInfo fieldInfo = uri.GetType().GetField("m_Syntax", BindingFlags.Instance | BindingFlags.NonPublic);
    if (fieldInfo == null)
        throw new MissingFieldException("'m_Syntax' field not found");

    object uriParser = fieldInfo.GetValue(uri);
    fieldInfo = typeof(UriParser).GetField("m_Flags", BindingFlags.Instance | BindingFlags.NonPublic);
    if (fieldInfo == null)
        throw new MissingFieldException("'m_Flags' field not found");

    object uriSyntaxFlags = fieldInfo.GetValue(uriParser);

    // Clear the flag that we don't want
    uriSyntaxFlags = (int)uriSyntaxFlags & ~UnEscapeDotsAndSlashes;
    uriSyntaxFlags = (int)uriSyntaxFlags & ~SimpleUserSyntax;
    fieldInfo.SetValue(uriParser, uriSyntaxFlags);
}

当然,这是一个黑客,所以你应该冒风险使用它:-)