c# MD5 校验文件

代码

   
     

    
      
    
       
    
      private
    
       
    
      string
    
       GetMd5Hash(
    
      string
    
       pathName)
 {
 
    
      string
    
       strResult 
    
      =
    
       
    
      ""
    
      ;
 
    
      string
    
       strHashData 
    
      =
    
       
    
      ""
    
      ;
 
    
      byte
    
      [] arrbytHashValue;

 System.IO.FileStream oFileStream 
    
      =
    
       
    
      null
    
      ;

 System.Security.Cryptography.MD5CryptoServiceProvider oMD5Hasher 
    
      =
    
      
 
    
      new
    
       System.Security.Cryptography.MD5CryptoServiceProvider();

 
    
      try
    
      
 {
 oFileStream 
    
      =
    
       
    
      new
    
       System.IO.FileStream(pathName, System.IO.FileMode.Open,
 System.IO.FileAccess.Read, System.IO.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 
    
      =
    
       System.BitConverter.ToString(arrbytHashValue);

 
    
      //
    
      替换-
    
      

    
       strHashData 
    
      =
    
       strHashData.Replace(
    
      "
    
      -
    
      "
    
      , 
    
      ""
    
      );

 strResult 
    
      =
    
       strHashData;
 }

 
    
      catch
    
       (System.Exception ex)
 {
 MessageBox.Show(ex.Message);
 }
 
    
      return
    
       strResult;
 }