C# 通过命令行实现--文件 MD5 Hash返回值

using System;
using System.Diagnostics;
using System.IO;
using System.Text;

namespace MD5Helper.Helper
{
    public class MD5Helper
    {
        //定义一个用于保存静态变量的实例
        private static MD5Helper instance = null;
        //定义一个保证线程同步的标识
        private static readonly object locker = new object();
        //构造函数为私有，使外界不能创建该类的实例
        private MD5Helper() { }
        public static MD5Helper Instance
        {
            get
            {
                if (instance == null)
                {
                    lock (locker)
                    {
                        if (instance == null) instance = new MD5Helper();
                    }
                }
                return instance;
            }
        }

        /// <summary>
        /// 执行外部命令
        /// </summary>
        /// <param name="cmd">命令参数</param>
        /// <param name="filePath">命令程序路径</param>
        /// <returns>执行结果</returns>
        public string ExecuteOutCmd(string cmd, string filePath)
        {
            using (var process = new Process())
            {
                ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
                startInfo.FileName = "cmd.exe"; //starts cmd window
                startInfo.WindowStyle = ProcessWindowStyle.Hidden;
                startInfo.CreateNoWindow = true;
                startInfo.RedirectStandardInput = true;
                startInfo.RedirectStandardOutput = true;
                startInfo.UseShellExecute = false; //required to redirect
                process.StartInfo = startInfo;

                process.Start();

                //string aa = "C:\\Windows\\System32\\cmd.exe /k  cd /d " + '"' + applocaltion + '"';
                //string bb = "certutil -hashfile " + "测试.pdf" + " MD5";
                //SW.WriteLine("@echo on");
                StreamWriter SW = process.StandardInput;
                SW.WriteLine(@"cd /d" + '"' + filePath + '"'); //the command you wish to run.....
                SW.WriteLine(cmd);
                SW.WriteLine("exit"); //exits command prompt window

                StreamReader reader = process.StandardOutput;
                string str = reader.ReadToEnd();

                process.WaitForExit();
                process.Close();
                return str;
            }
        }

        public string RunCmdBack(string cmd)
        {
            StringBuilder builder = new StringBuilder();
            Process process = new Process();
            try
            {
                process.StartInfo.FileName = "cmd.exe";
                //执行命令
                process.StartInfo.Arguments = $"/C {cmd}";
                process.StartInfo.UseShellExecute = false;//不启用shell
                process.StartInfo.RedirectStandardInput = true;
                process.StartInfo.RedirectStandardOutput = true;
                process.StartInfo.RedirectStandardError = true;
                process.StartInfo.CreateNoWindow = true;//不使用窗口
                process.Start();

                StreamReader reader = process.StandardOutput;
                string line = "";//每次读取一行
                while ((line = reader.ReadLine()) != null)
                {
                    builder.AppendLine(line);
                }

                process.WaitForExit();
                process.Close();
                reader.Close();
            }
            catch (Exception e)
            {
                process.Close();
                Console.WriteLine(e.Message);
            }

            return builder.ToString();
        }

    }
}

RunCmdBack——入参：certutil -hashfile c:\3d4596eb-6f99-4e9f-bb68-a8672cb5dd46.pdf  md5

返回值：(注意，文件夹路径中文件夹名称不能存在空格)

使用方式如下所示：

private void btnGetHash_Click(object sender, EventArgs e)
        {
            string filePath = Application.StartupPath + "\\TestFile";
            string cmd = "certutil -hashfile " + "测试.pdf" + " MD5";
            //filePath = "D:\\测试 空格 文件夹";
            var cmdFileHash = MD5Helper.Helper.MD5Helper.Instance.ExecuteOutCmd(cmd, filePath);
            this.txtCMDHash.Text = cmdFileHash;

            string runcmd = "certutil -hashfile " + Application.StartupPath + "\\TestFile\\测试.pdf" + " MD5";
            this.txtCodeHash.Text = MD5Helper.Helper.MD5Helper.Instance.RunCmdBack(runcmd); 

        }

运行效果如下所示：

 ExecuteOutCmd 测试文件夹有空格的文件夹名称，如下所示：