c# - C# 启动一个新的 MailTo 进程和 HTML URL 编码

Question

我为 Process 类创建了一个新的 MailTo 扩展方法，它只是用一个包含所需 mailto 参数的新 ProcessStartinfo 填充 Process。我创建了一个名为 FormatMailToArgument 的方法（最后右），它将控制字符转换为它们的 Url Encoded equivelants 并且已经测试了它并且它有效但是有没有更好的方法来做到这一点？

/// <summary>
/// <see cref="Process"/> extension methods.
/// </summary>
public static class Processes
{
    #region MailTo

    /// <summary>
    /// Populates the process with mailto <see cref="ProcessStartInfo"/>. You may leave any
    /// argument as <c>null</c> if not needed.
    /// </summary>
    /// <param name="process">The process.</param>
    /// <param name="mailMessage">The mail message.</param>
    public static void MailTo(this Process process, MailMessage mailMessage)
    {
        MailTo(
            process,
            mailMessage.To.ToDelimetedString(),
            mailMessage.CC.ToDelimetedString(),
            mailMessage.Bcc.ToDelimetedString(),
            mailMessage.Subject,
            mailMessage.Body);
    }

    /// <summary>
    /// Populates the process with mailto <see cref="ProcessStartInfo"/>. You may leave any
    /// argument as <c>null</c> if not needed.
    /// </summary>
    /// <param name="process">The process.</param>
    /// <param name="to">To email addresses.</param>
    public static void MailTo(this Process process, IEnumerable<string> to)
    {
        MailTo(
            process,
            to.ToDelimetedString(Character.SemiColon),
            null,
            null,
            null,
            null);
    }

    /// <summary>
    /// Populates the process with mailto <see cref="ProcessStartInfo"/>. You may leave any
    /// argument as <c>null</c> if not needed.
    /// </summary>
    /// <param name="process">The process.</param>
    /// <param name="to">To email addresses.</param>
    /// <param name="subject">The email subject.</param>
    public static void MailTo(this Process process, IEnumerable<string> to, string subject)
    {
        MailTo(
            process,
            to.ToDelimetedString(Character.SemiColon),
            null,
            null,
            subject,
            null);
    }

    /// <summary>
    /// Populates the process with mailto <see cref="ProcessStartInfo"/>. You may leave any
    /// argument as <c>null</c> if not needed.
    /// </summary>
    /// <param name="process">The process.</param>
    /// <param name="to">To email addresses.</param>
    /// <param name="subject">The email subject.</param>
    /// <param name="body">The email body.</param>
    public static void MailTo(
        this Process process,
        IEnumerable<string> to,
        string subject,
        string body)
    {
        MailTo(
            process,
            to.ToDelimetedString(Character.SemiColon),
            null,
            null,
            subject,
            body);
    }

    /// <summary>
    /// Populates the process with mailto <see cref="ProcessStartInfo"/>. You may leave any
    /// argument as <c>null</c> if not needed.
    /// </summary>
    /// <param name="process">The process.</param>
    /// <param name="to">To email addresses.</param>
    /// <param name="cc">The Cc email addresses.</param>
    /// <param name="subject">The email subject.</param>
    /// <param name="body">The email body.</param>
    public static void MailTo(
        this Process process,
        IEnumerable<string> to,
        IEnumerable<string> cc,
        string subject,
        string body)
    {
        MailTo(
            process,
            to.ToDelimetedString(Character.SemiColon),
            cc.ToDelimetedString(Character.SemiColon),
            null,
            subject,
            body);
    }

    /// <summary>
    /// Populates the process with mailto <see cref="ProcessStartInfo"/>. You may leave any 
    /// argument as <c>null</c> if not needed.
    /// </summary>
    /// <param name="process">The process.</param>
    /// <param name="to">To email addresses.</param>
    /// <param name="cc">The Cc email addresses.</param>
    /// <param name="bcc">The Bcc email addresses.</param>
    /// <param name="subject">The email subject.</param>
    /// <param name="body">The email body.</param>
    public static void MailTo(
        this Process process,
        IEnumerable<string> to,
        IEnumerable<string> cc,
        IEnumerable<string> bcc,
        string subject,
        string body)
    {
        MailTo(
            process,
            (to == null) ? null : to.ToDelimetedString(Character.SemiColon),
            (cc == null) ? null : cc.ToDelimetedString(Character.SemiColon),
            (bcc == null) ? null : bcc.ToDelimetedString(Character.SemiColon),
            subject,
            body);
    }

    /// <summary>
    /// Populates the process with mailto <see cref="ProcessStartInfo"/>. You may leave any
    /// argument as <c>null</c> if not needed.
    /// </summary>
    /// <param name="process">The process.</param>
    /// <param name="to">To email addresses.</param>
    /// <param name="cc">The Cc email addresses.</param>
    /// <param name="bcc">The Bcc email addresses.</param>
    /// <param name="subject">The email subject.</param>
    /// <param name="body">The email body.</param>
    /// <param name="attachmentPath">The attachment file path.</param>
    public static void MailTo(
        this Process process,
        IEnumerable<string> to,
        IEnumerable<string> cc,
        IEnumerable<string> bcc,
        string subject,
        string body,
        string attachmentPath)
    {
        MailTo(
            process,
            (to == null) ? null : to.ToDelimetedString(Character.SemiColon),
            (cc == null) ? null : cc.ToDelimetedString(Character.SemiColon),
            (bcc == null) ? null : bcc.ToDelimetedString(Character.SemiColon),
            subject,
            body,
            attachmentPath);
    }

    /// <summary>
    /// Populates the process with mailto <see cref="ProcessStartInfo"/>. You may leave any 
    /// argument as <c>null</c> if not needed.
    /// </summary>
    /// <param name="process">The process.</param>
    /// <param name="to">To email addresses delimeted by a semi-colon.</param>
    /// <param name="cc">The Cc email addresses delimeted by a semi-colon.</param>
    /// <param name="bcc">The Bcc email addresses delimeted by a semi-colon.</param>
    /// <param name="subject">The email subject.</param>
    /// <param name="body">The email body.</param>
    public static void MailTo(this Process process, string to, string cc, string bcc, string subject, string body)
    {
        MailTo(process, to, cc, bcc, subject, body, null);
    }

    /// <summary>
    /// Populates the process with mailto <see cref="ProcessStartInfo"/>. You may leave any
    /// argument as <c>null</c> if not needed.
    /// </summary>
    /// <param name="process">The process.</param>
    /// <param name="to">To email addresses delimeted by a semi-colon.</param>
    /// <param name="cc">The Cc email addresses delimeted by a semi-colon.</param>
    /// <param name="bcc">The Bcc email addresses delimeted by a semi-colon.</param>
    /// <param name="subject">The email subject.</param>
    /// <param name="body">The email body.</param>
    /// <param name="attachmentPath">The attachment file path. Note: this will not work in some 
    /// email applications.</param>
    public static void MailTo(
        this Process process,
        string to,
        string cc,
        string bcc,
        string subject,
        string body,
        string attachmentPath)
    {
        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.Append(Uri.UriSchemeMailto + Character.Colon);
        stringBuilder.Append(FormatMailToArgument(to));

        if (!string.IsNullOrEmpty(cc) || !string.IsNullOrEmpty(bcc) ||
            !string.IsNullOrEmpty(subject) || !string.IsNullOrEmpty(body) ||
            !string.IsNullOrEmpty(attachmentPath))
        {
            stringBuilder.Append(Character.Question);

            List<string> arguments = new List<string>();

            if (!string.IsNullOrEmpty(subject))
            {
                arguments.Add("subject=" + FormatMailToArgument(subject));
            }

            if (!string.IsNullOrEmpty(body))
            {
                arguments.Add("body=" + FormatMailToArgument(body));
            }

            if (!string.IsNullOrEmpty(cc))
            {
                arguments.Add("CC=" + FormatMailToArgument(cc));
            }

            if (!string.IsNullOrEmpty(bcc))
            {
                arguments.Add("BCC=" + FormatMailToArgument(bcc));
            }

            if (!string.IsNullOrEmpty(attachmentPath))
            {
                arguments.Add("attachment=" + FormatMailToArgument(attachmentPath));
            }

            stringBuilder.Append(arguments.ToDelimetedString(Character.Ampersand));
        }

        process.StartInfo = new ProcessStartInfo(stringBuilder.ToString());
    }

    #endregion

    #region Methods

    /// <summary>
    /// Formats the mailto argument. Converts <![CDATA['%', '&', ' ', '?', '\t', '\n']]> to their 
    /// hexadecimal representation.
    /// </summary>
    /// <param name="argument">The argument.</param>
    /// <returns>The formatted argument.</returns>
    private static string FormatMailToArgument(string argument)
    {
        return argument.
            Replace(Character.Percent.ToString(), "%25").
            Replace(Character.Ampersand.ToString(), "%26").
            Replace(Character.Colon.ToString(), "%3A").
            Replace(Character.HorizontalTab.ToString(), "%0D").
            Replace(Character.NewLine.ToString(), "%0A").
            Replace(Character.Question.ToString(), "%3F").
            Replace(Character.Quote.ToString(), "%22").
            Replace(Character.Space.ToString(), "%20");
    }

    #endregion
}

score 8 · Accepted Answer

如果您的意思是有更有效的方法来转义您的电子邮件地址，那么是的，您可以使用 System.Uri 类。

string escapedAddress = Uri.EscapeUriString("mailto:joe blogg's\r\n@mail.com");
Console.WriteLine(escapedAddress);

输出：

mailto:joe%20blogg's%0D%0A@mail.com

您会注意到在我的示例中，单引号字符没有被转义，但那是因为它不需要在电子邮件地址中。

就您使用的一般方法而言，我不明白为什么要向 Process 类添加扩展方法。发送电子邮件并转义所有地址。附件、服务器身份验证等等等。为什么不使用 System.Net.Mail类？

score 0 · Accepted Answer

如官方链接中所述，该EscapeUriString方法假定stringToEscape参数中没有转义序列。

这种方法非常适合转义 Uris，但要小心，因为目标字符串是mailto:一行可以包含许多参数（不仅是主题、正文，...），显然每个参数都用一些转义字符...例如&和? .

因此，在我对带有来自@anon 注释的文本的 Windows 应用商店应用程序的测试中，该字符串不会仅 Uri.EscapeUriString()使用方法完全转义，因为它包含转义序列&。

您将需要一个额外的手动转义才能将整个字符串作为mailto:Uri 中的参数传递：

Uri.EscapeUriString(stringToEscape).Replace("&", "%26");

c# - C# 启动一个新的 MailTo 进程和 HTML URL 编码

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