Base64的解码和编码

把UTF8的string转化为base64的string：

 

代码

   
   

    
    
    
    public string base64Encode(string data)
{
 try
 {
 byte[] encData_byte = new byte[data.Length];
 encData_byte = System.Text.Encoding.UTF8.GetBytes(data); 
 string encodedData = Convert.ToBase64String(encData_byte);
 return encodedData;
 }
 catch(Exception e)
 {
 throw new Exception("Error in base64Encode" + e.Message);
 }
}
   
   

 

 

把Base64的string转化为UTF8的string：

 

代码

   
   

    
    
    
    public string base64Decode(string data)
{
 try
 {
 System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding(); 
 System.Text.Decoder utf8Decode = encoder.GetDecoder();
 
 byte[] todecode_byte = Convert.FromBase64String(data);
 int charCount = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length); 
 char[] decoded_char = new char[charCount];
 utf8Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0); 
 string result = new String(decoded_char);
 return result;
 }
 catch(Exception e)
 {
 throw new Exception("Error in base64Decode" + e.Message);
 }
}
   
   

 

 

最主要的是使用System.Convert

 

ps:帖子借鉴：http://www.vbforums.com/showthread.php?s=&threadid=287324