127 lines
3.9 KiB
C#
127 lines
3.9 KiB
C#
using System;
|
|
using System.IO;
|
|
using System.Text;
|
|
|
|
namespace AllBase
|
|
{
|
|
|
|
/// <summary>
|
|
/// 实现Base64加密解密
|
|
/// 作者：周公
|
|
/// 时间：2007
|
|
/// </summary>
|
|
public static class Base64Encode
|
|
{
|
|
/// <summary>
|
|
/// Base64加密
|
|
/// </summary>
|
|
/// <param name="codeName">加密采用的编码方式</param>
|
|
/// <param name="source">待加密的明文</param>
|
|
/// <returns></returns>
|
|
public static string EncodeBase64(Encoding encode, string source)
|
|
{
|
|
byte[] bytes = encode.GetBytes(source);
|
|
try
|
|
{
|
|
string code = Convert.ToBase64String(bytes);
|
|
return code;
|
|
}
|
|
catch
|
|
{
|
|
return source;
|
|
}
|
|
|
|
}
|
|
|
|
/// <summary>
|
|
/// Base64加密，采用utf8编码方式加密
|
|
/// </summary>
|
|
/// <param name="source">待加密的明文</param>
|
|
/// <returns>加密后的字符串</returns>
|
|
public static string EncodeBase64(string source)
|
|
{
|
|
return EncodeBase64(Encoding.UTF8, source);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Base64解密
|
|
/// </summary>
|
|
/// <param name="codeName">解密采用的编码方式，注意和加密时采用的方式一致</param>
|
|
/// <param name="result">待解密的密文</param>
|
|
/// <returns>解密后的字符串</returns>
|
|
public static string DecodeBase64(Encoding encode, string result)
|
|
{
|
|
string decode = "";
|
|
byte[] bytes = Convert.FromBase64String(result);
|
|
try
|
|
{
|
|
decode = encode.GetString(bytes);
|
|
}
|
|
catch
|
|
{
|
|
decode = result;
|
|
}
|
|
return decode;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Base64解密，采用utf8编码方式解密
|
|
/// </summary>
|
|
/// <param name="result">待解密的密文</param>
|
|
/// <returns>解密后的字符串</returns>
|
|
public static string DecodeBase64(string result)
|
|
{
|
|
return DecodeBase64(Encoding.UTF8, result);
|
|
}
|
|
|
|
/// <summary>
|
|
/// 文件转Base64编码
|
|
/// </summary>
|
|
/// <param name="fileName">文件全路径</param>
|
|
/// <returns></returns>
|
|
public static string DocumentToBase64Str(string fileName)
|
|
{
|
|
FileStream filestream = new FileStream(fileName, FileMode.Open);
|
|
|
|
byte[] bt = new byte[filestream.Length];
|
|
//调用read读取方法
|
|
filestream.Read(bt, 0, bt.Length);
|
|
string base64Str = Convert.ToBase64String(bt);
|
|
filestream.Close();
|
|
return base64Str;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Base64字符串转文件并保存
|
|
/// </summary>
|
|
/// <param name="base64String">base64字符串</param>
|
|
/// /// <param name="fileFullPath">保存的文件路径 </param>
|
|
/// <param name="fileName">保存的文件名</param>
|
|
/// <returns>是否转换并保存成功</returns>
|
|
public static bool Base64StringToFile(string base64String, string fileFullPath, string fileName)
|
|
{
|
|
bool opResult = false;
|
|
try
|
|
{
|
|
|
|
if (!Directory.Exists(fileFullPath))
|
|
{
|
|
Directory.CreateDirectory(fileFullPath);
|
|
}
|
|
MemoryStream stream = new MemoryStream(Convert.FromBase64String(base64String));
|
|
FileStream fs = new FileStream(fileFullPath + "\\" + fileName, FileMode.OpenOrCreate, FileAccess.Write);
|
|
byte[] b = stream.ToArray();
|
|
fs.Write(b, 0, b.Length);
|
|
fs.Close();
|
|
|
|
opResult = true;
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
|
|
}
|
|
return opResult;
|
|
}
|
|
}
|
|
}
|