【C#】MD5 小程序编写

通过事件机制，增加了计算MD5过程提示。

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92

using  System; using  System.Collections.Generic; using  System.ComponentModel; using  System.Data; using  System.Drawing; using  System.Linq; using  System.Text; using  System.Threading.Tasks; using  System.Windows.Forms; using  System.IO;   namespace  WindowsFormsApplication13 {      public  partial  class  Form1 : Form      {          public  delegate  void  delegateMD( object  sender, EventArgs e);          public  event  delegateMD openfileEvent;          public  event  delegateMD finishEvent;            public  Form1()          {              InitializeComponent();          }            private  void  Form1_Load( object  sender, EventArgs e)          {            }            private  async  void  button1_Click( object  sender, EventArgs e)          {              openfileEvent += ( object  obj, EventArgs e1) => {                  label1.Text =  "正在计算MD5值，请稍等。。。" ; };                finishEvent += ( object  obj, EventArgs e1) =>                {                    label1.Text =  "" ;                };                using  (OpenFileDialog dialog =  new  OpenFileDialog())              {                  if  (dialog.ShowDialog() == DialogResult.OK)                  {                      openfileEvent( this , e);                      String fileName = dialog.FileName;                      this .textBox1.Text =  "" ;                      //this.txtSH1.Text = "";                      //                      this .textBox1.Text = await getMD5HashAsync(fileName);                      //this.txtSH1.Text = GetMD5Hash(fileName);                      finishEvent( this , e);                  }              }          }          //计算文件的MD5码          private  Task< string > getMD5HashAsync( string  pathName)          {              return  Task.Run< string >( () =>              {                  string  strResult =  "" ;                  string  strHashData =  "" ;                    byte [] arrbytHashValue;                  System.IO.FileStream oFileStream =  null ;                    System.Security.Cryptography.MD5CryptoServiceProvider oMD5Hasher =                             new  System.Security.Cryptography.MD5CryptoServiceProvider();                    try                  {                      oFileStream =  new  FileStream(pathName, FileMode.Open,                            FileAccess.Read,FileShare.ReadWrite);                      arrbytHashValue = oMD5Hasher.ComputeHash(oFileStream); //计算指定Stream 对象的哈希值                      oFileStream.Close();                      //由以连字符分隔的十六进制对构成的String，其中每一对表示value 中对应的元素；例如“F-2C-4A”                      strHashData = BitConverter.ToString(arrbytHashValue);                      //替换-                      strHashData = strHashData.Replace( "-" ,  "" );                      strResult = strHashData;                  }                  catch  (System.Exception ex)                  {                      MessageBox.Show(ex.Message);                  }                    return  strResult;              });          }      }         }

异步执行代码：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78

using  System; using  System.Collections.Generic; using  System.ComponentModel; using  System.Data; using  System.Drawing; using  System.Linq; using  System.Text; using  System.Threading.Tasks; using  System.Windows.Forms; using  System.IO;   namespace  WindowsFormsApplication13 {      public  partial  class  Form1 : Form      {          public  Form1()          {              InitializeComponent();          }            private  void  Form1_Load( object  sender, EventArgs e)          {            }            private  async  void  button1_Click( object  sender, EventArgs e)          {              using  (OpenFileDialog dialog =  new  OpenFileDialog())              {                  if  (dialog.ShowDialog() == DialogResult.OK)                  {                      String fileName = dialog.FileName;                      this .textBox1.Text =  "" ;                      //this.txtSH1.Text = "";                      //                      this .textBox1.Text = await getMD5HashAsync(fileName);                      //this.txtSH1.Text = GetMD5Hash(fileName);                  }              }          }          //计算文件的MD5码          private  Task< string > getMD5HashAsync( string  pathName)          {              return  Task.Run< string >( () =>              {                  string  strResult =  "" ;                  string  strHashData =  "" ;                    byte [] arrbytHashValue;                  System.IO.FileStream oFileStream =  null ;                    System.Security.Cryptography.MD5CryptoServiceProvider oMD5Hasher =                             new  System.Security.Cryptography.MD5CryptoServiceProvider();                    try                  {                      oFileStream =  new  FileStream(pathName, FileMode.Open,                            FileAccess.Read,FileShare.ReadWrite);                      arrbytHashValue = oMD5Hasher.ComputeHash(oFileStream); //计算指定Stream 对象的哈希值                      oFileStream.Close();                      //由以连字符分隔的十六进制对构成的String，其中每一对表示value 中对应的元素；例如“F-2C-4A”                      strHashData = BitConverter.ToString(arrbytHashValue);                      //替换-                      strHashData = strHashData.Replace( "-" ,  "" );                      strResult = strHashData;                  }                  catch  (System.Exception ex)                  {                      MessageBox.Show(ex.Message);                  }                    return  strResult;              });          }      }         }

参考链接：

http://blog.youkuaiyun.com/chuangxin/article/details/5333376

      本文转自daniel8294 51CTO博客，原文链接：http://blog.51cto.com/acadia627/1931427，如需转载请自行联系原作者