日期:2014-05-16  浏览次数:20474 次

Asp.net 向数据库内存储图片(一)

最近做项目,要将客户端图片转化为二进制,保存到数据库中。

将图片转化为二进制:

(1)通过图片路径进行转化

	private byte[] reDyte(string strPath)
        {
            // 以二进制方式读文件
            FileStream fsMyfile = new FileStream(strPath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
            // 创建一个二进制数据流读入器,和打开的文件关联
            BinaryReader brMyfile = new BinaryReader(fsMyfile);
            // 把文件指针重新定位到文件的开始
            brMyfile.BaseStream.Seek(0, SeekOrigin.Begin);
            byte[] bytes = brMyfile.ReadBytes(Convert.ToInt32(fsMyfile.Length.ToString()));
            // 关闭以上new的各个对象
            brMyfile.Close();
            return bytes;
        }

(2)通过图片对象进行转化

 	private static byte[] Getbyte(Image img)
        {
            MemoryStream stream = new MemoryStream();
            //img.Save(stream,ImageFormat.Jpeg);
            byte[] mydata = new byte[stream.Length];
            mydata = stream.ToArray();
            stream.Close();
            return mydata;
        }

3)将二进制转化为图片

	private System.Drawing.Image getImage(byte[] fileData)
        {
           System.IO.MemoryStream ms = new System.IO.MemoryStream(fileData);
           System.Drawing.Image img = System.Drawing.Image.FromStream(ms);             return img;
        } 

4)利用image显示

	private void ImgShow(WorkerInfo workerInfo)
        {
            string strPicture = "";
            System.Drawing.Image imgPictureShow = getImage(workerInfo.Photo);
            //定义文件名
            strPicture = "Picture" + DateTime.Now.ToString("yyMMddhhmmss");
            imgPictureShow.Save(Server.MapPath("~/pic/") + strPicture + "jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
            //显示文件
            imgPicture.ImageUrl = "pic/" + strPicture + ".jpg";