图片的上传

文件转为二进制流

                    FileStream fs =new FileStream(strFile,FileMode.OpenOrCreate, FileAccess.Read);
                    Byte[] img = new Byte[fs.Length];

                    fs.Read(img, 0, Convert.ToInt32(fs.Length));

二进制流写入文件

           MemoryStream ms =new System.IO.MemoryStream(mybyte);
           Bitmap b =(Bitmap)Image.FromStream(ms);

            b.Save(filePath,ImageFormat.Png);

多图片上传

        private void button3_Click(object sender, EventArgs e)
        {
            dlZipDir();


        }
        private void dlZipDir()//string strPath, string strFileName)
        {
            string strPath = @"C:\Documents and Settings\wuy\桌面\DataModelMapping_20060925_01";

            String strBaseDir = "";
            MemoryStream ms = null;
            ms = new MemoryStream();
            zos = new ZipOutputStream(ms);
            //zos = new ZipOutputStream(File.Create(outname));
            strBaseDir = strPath + "\\";
            addZipEntry(strBaseDir);
            zos.Finish();
            zos.Close();
        }
        private void addZipEntry(string PathStr)
        {
            DirectoryInfo di = new DirectoryInfo(PathStr);
            foreach (DirectoryInfo item in di.GetDirectories())
            {
                addZipEntry(item.FullName);
            }
            foreach (FileInfo item in di.GetFiles())
            {
                FileStream fs = File.OpenRead(item.FullName);
                byte[] buffer = new byte[fs.Length];
                fs.Read(buffer, 0, buffer.Length);
                string strEntryName = item.FullName.Replace("aa", "");
                ZipEntry entry = new ZipEntry(strEntryName);
                zos.PutNextEntry(entry);
                zos.Write(buffer, 0, buffer.Length);
                fs.Close();
            }
        }