1、base64 to string

string strPath = "aHR0cDovLzIwMy44MS4yOS40Njo1NTU3L1 9iYWlkdS9yaW5ncy9taWRpLzIwMDA3MzgwLTE2Lm1pZA=="; byte[] bpath = Convert.FromBase64String(strPath); strPath = System.Text.ASCIIEncoding.Default.GetString(bpath);

2、string to base64

System.Text.Encoding encode = System.Text.Encoding.ASCII ; byte[] bytedata = encode.GetBytes( "test"); string strPath = Convert.ToBase64String(bytedata,0,bytedata.Length);