我正尝试通过Process.Start手动打印PDF，但在IIS中无法工作。我在Windows窗体应用程序中复制了相同的代码，并成功了。我已尝试将权限授予“网络服务”用户（我的应用程序池具有网络服务权限）。我还遵循了以下步骤：IIS7 does not start my Exe file by Process Start

string file = @"C:\test.pdf";
            string printer = "TestPrinter";

            string processFilename = Microsoft.Win32.Registry.LocalMachine
                .OpenSubKey("Software")
                .OpenSubKey("Microsoft")
                .OpenSubKey("Windows")
                .OpenSubKey("CurrentVersion")
                .OpenSubKey("App Paths")
                .OpenSubKey("AcroRd32.exe")
                .GetValue(String.Empty).ToString();

            var info = new ProcessStartInfo();
            info.FileName = processFilename;
            info.Arguments = string.Format("/h /t \"{0}\" \"{1}\"", file, printer);
            info.CreateNoWindow = true;
            info.WindowStyle = ProcessWindowStyle.Hidden;
            info.UseShellExecute = false;

            Process p = Process.Start(info);
            p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;

            int counter = 0;
            while (!p.HasExited)
            {
                System.Threading.Thread.Sleep(1000);
                counter += 1;
                if (counter == 5) break;
            }
            if (!p.HasExited)
            {
                p.CloseMainWindow();
                p.Kill();
            }