c# - Process.Start - 将 html 代码作为参数传递给 exe

Question

我正在使用下面的代码从 Windows 服务启动可执行文件，我需要将 html 代码（存储在变量中）作为参数传递。我用双引号转义，但这不起作用。我需要做什么才能正确通过这个？提前感谢您提供的任何指导。

服务内部：

Process.Start(@"E:\Program Files\MyApp.exe", dr["rec"].ToString() +
                                  " \"" + subject + "\" \"" + htmlVar);

然后在 MyApp.exe 中：

static void Main(string[] args)
{
    Program MyProg = new Program();
    MyProg.MyMeth(args[0].ToString(), args[1].ToString(), args[2].ToString());
}

exe 文件只是一个处理电子邮件发送的简单应用程序。dr["rec"].ToString() 是收件人的电子邮件地址。变量“主题”将包含电子邮件的主题。变量“htmlVar”可以包含任何内容、div、图像、超链接等。而且 html 代码可能很长。我不应该尝试将这么多数据作为参数传递吗？再次感谢您的帮助。

score 5 · Accepted Answer

您可能需要对以下字符进行编码以使它们可以在命令行参数中传递：

双引号
回车
换行

score 4 · Accepted Answer

注意不要在命令行上传递太多：

什么是命令行长度限制？

我认为 2000 多个字符开始变得太长了。

score 2 · Accepted Answer

From MSDN documentation: http://msdn.microsoft.com/en-us/library/h6ak8zt5.aspx

  // Opens urls and .html documents using Internet Explorer.
   void OpenWithArguments()
   {
      // url's are not considered documents. They can only be opened
      // by passing them as arguments.
      Process.Start("IExplore.exe", "www.northwindtraders.com");

      // Start a Web page using a browser associated with .html and .asp files.
      Process.Start("IExplore.exe", "C:\\myPath\\myFile.htm");
      Process.Start("IExplore.exe", "C:\\myPath\\myFile.asp");
   }

Edit: AaronLS made it a little more clear as to what you're trying to accomplish. to pass multiple arguments

Process myProcess = new Process();
string arg = String.Format("{0} {1}{2}{1} {1}{3}{1}", dr["rec"], '"',htmlVar); 
myProcess.StartInfo.FileName = @"E:\Program Files\MyApp.exe";
myProcess.StartInfo.Arguments = ArgvToCommandLine(new string[] { arg });

myProcess.Start();

The following methods were taken from the MSDN page for ProcessStartInfo arguments: http://msdn.microsoft.com/en-us/library/system.diagnostics.processstartinfo.arguments.aspx

 public static string ArgvToCommandLine(IEnumerable<string> args)
    {
        StringBuilder sb = new StringBuilder();
        foreach (string s in args)
        {
            sb.Append('"');
            // Escape double quotes (") and backslashes (\).
            int searchIndex = 0;
            while (true)
            {
                // Put this test first to support zero length strings.
                if (searchIndex >= s.Length)
                {
                    break;
                }
                int quoteIndex = s.IndexOf('"', searchIndex);
                if (quoteIndex < 0)
                {
                    break;
                }
                sb.Append(s, searchIndex, quoteIndex - searchIndex);
                EscapeBackslashes(sb, s, quoteIndex - 1);
                sb.Append('\\');
                sb.Append('"');
                searchIndex = quoteIndex + 1;
            }
            sb.Append(s, searchIndex, s.Length - searchIndex);
            EscapeBackslashes(sb, s, s.Length - 1);
            sb.Append(@""" ");
        }
        return sb.ToString(0, Math.Max(0, sb.Length - 1));
    }
    private static void EscapeBackslashes(StringBuilder sb, string s, int lastSearchIndex)
    {
        // Backslashes must be escaped if and only if they precede a double quote.
        for (int i = lastSearchIndex; i >= 0; i--)
        {
            if (s[i] != '\\')
            {
                break;
            }
            sb.Append('\\');
        }
    }

That's not the most efficient solution to your problem, but I just copied the code so you could see how to properly escape characters that may be present in your htmlvars variable.

score 0 · Accepted Answer

" \"" + subject + "\" \"" + htmlVar

Becomes

"SomeSubject" "SomeHTMLVar

Notice there is no closing quote. Maybe you wanted this:

" \"" + subject + "\" \"" + htmlVar + "\""

c# - Process.Start - 将 html 代码作为参数传递给 exe

4 回答 4

Related

Reference