文件与base64二进制转换

/// <summary>
/// 文件转换为Base64二进制流
/// </summary>
/// <param name="FilePath"></param>
/// <returns></returns>
public static string FileToBase64(string FilePath)
{
　　FileStream fileStream = File.Open(FilePath, FileMode.OpenOrCreate);
　　byte[] buffer = new byte[fileStream.Length];
　　fileStream.Read(buffer, , buffer.Length);
　　fileStream.Close();
　　return Convert.ToBase64String(buffer);
}

/// <summary>
/// Base64二进制流还原文件
/// </summary>
/// <param name="FilePath">存放文件的路径</param>
/// <param name="StringBase64">文件Base64二进制流</param>
public static void Base64TeCode(string FilePath,string StringBase64)
{
　　FileStream fileStream = new FileStream(FilePath, FileMode.Create);
　　byte[] buffer = Convert.FromBase64String(StringBase64);
　　fileStream.Write(buffer, , buffer.Length);
　　fileStream.Close();
}