C# 附件转二进制数据 二进制数据转附件

废话不多说，直接看代码！！！

  #region 二进制数据转换为附件
        /// <summary>
        /// 二进制数据转换为附件
        /// </summary>
        /// <param name="data">二进制数据</param>
        /// <param name="fileName">附件.后缀</param>
        /// <param name="savePath">保存路径</param>
        /// <returns>保存的相对路径</returns>
        public string ByteConvertFile(byte[] data, string fileName, string savePath)
        {
            if (!System.IO.Directory.Exists(savePath))
            {
                Directory.CreateDirectory(savePath);
            }

            savePath += fileName;

            FileStream fs;
            if (System.IO.File.Exists(savePath))
            {
                fs = new FileStream(savePath, FileMode.Truncate);
            }
            else
            {
                fs = new FileStream(savePath, FileMode.CreateNew);
            }
            BinaryWriter br = new BinaryWriter(fs);
            br.Write(data, 0, data.Length);
            br.Close();
            fs.Close();

            return savePath;
        }
        #endregion

        #region 附件转换二进制数据(用于保存数据库)
        /// <summary>
        /// 附件转换二进制数据(用于保存数据库)
        /// </summary>
        /// <param name="filePath">附件路径</param>
        /// <returns>二进制</returns>
        private byte[] fileConvertByte(string filePath)
        {
            byte[] bytContent = null;
            System.IO.FileStream fs = null;
            System.IO.BinaryReader br = null;
            try
            {
                fs = new FileStream(filePath, System.IO.FileMode.Open);
            }
            catch
            {
            }
            br = new BinaryReader((Stream)fs);
            bytContent = br.ReadBytes((Int32)fs.Length);

            return bytContent;
        }
        #endregion

        //测试方法
        protected void Button1_Click1(object sender, EventArgs e)
        {
            string newWord = ByteConvertFile(fileConvertByte(@"D:\Portal\UpLoadFiles\sP2_20110925210928.jpg"), "测试成功.jpg", @"F:\abc\");
            Label1.Text = newWord;
        }