peis/src/Shentun.Utilities/FileHelper.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace Shentun.Utilities
{
    public class FileHelper
    {
        public static string ToBase64(string filename)
        {
            Stream stream;
            string fileBase64;
            using (stream = new FileStream(filename, FileMode.Open, FileAccess.Read))
            {
                byte[] byteData = new byte[stream.Length];
                stream.Read(byteData, 0, byteData.Length);
                fileBase64 = Convert.ToBase64String(byteData);
                stream.Close();
            }
            return fileBase64;
        }
    }
}