第一种方式 文件夹与数据库配合
/// <summary> /// 上传图片 /// </summary> /// <param name="FUSShopURL">FileUpload对象</param> /// <param name="UpladURL">图片要放到的目录名称</param> /// <returns>如果FileUpload不为空则返回上传后的图片位置,否则返回为空字符</returns> public static string uploadImage(FileUpload FUSShopURL, string UpladURL) { if (FUSShopURL.HasFile) { //获取当前的时间,一当作图片的名字 string fileName = DateTime.Now.ToString("yyyyMMddhhmmss") + DateTime.Now.Millisecond.ToString(); //获取图片的扩展名 string Extent = System.IO.Path.GetExtension(FUSShopURL.PostedFile.FileName); //重命名图片 fileName += Extent; //设置上传图片保存的文件夹 string dir = System.Web.HttpContext.Current.Server.MapPath(UpladURL); //指定图片的路径及文件名 string path = dir + "\" + fileName; //把上传得图片保存到指定的文件加中 FUSShopURL.PostedFile.SaveAs(path); return fileName; } else { return ""; } }
第二种方式 直接把图片的Base64String码进行存取
//选择图片 private void button1_Click(object sender, EventArgs e) { OpenFileDialog openfile = new OpenFileDialog(); openfile.Title = "请选择客户端longin的图片"; openfile.Filter = "Login图片(*.jpg;*.bmp;*png)|*.jpeg;*.jpg;*.bmp;*.png|AllFiles(*.*)|*.*"; if (DialogResult.OK == openfile.ShowDialog()) { try { Bitmap bmp = new Bitmap(openfile.FileName); pictureBox1.Image = bmp; pictureBox1.SizeMode = PictureBoxSizeMode.Zoom; MemoryStream ms = new MemoryStream(); bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Gif); byte[] arr = new byte[ms.Length]; ms.Position = 0; ms.Read(arr, 0, (int)ms.Length); ms.Close(); //直接返这个值放到数据就行了 pic = Convert.ToBase64String(arr); } catch { } } }
读取的方法也很简单, pic就是我们得到的图片字符串只要我们存储到数据库里,从下面的方法里读取就可以了
//加载图片 private void Form1_Load(object sender, EventArgs e) { try { // pic=........这一句换成从数据库里读取就可以了 //判断是否为空,为空时的不执行 if (!string.IsNullOrEmpty(pic)) { //直接返Base64码转成数组 byte[] imageBytes = Convert.FromBase64String(pic); //读入MemoryStream对象 MemoryStream memoryStream = new MemoryStream(imageBytes, 0, imageBytes.Length); memoryStream.Write(imageBytes, 0, imageBytes.Length); //转成图片 Image image = Image.FromStream(memoryStream); //memoryStream.Close();//不要加上这一句否则就不对了 // 将图片放置在 PictureBox 中 this.pictureBox1.SizeMode = PictureBoxSizeMode.Zoom; this.pictureBox1.Image = image; } } catch { } }
第三种方式 读成二进制后进行存取
private void button1_Click(object sender, EventArgs e) { OpenFileDialog openfile = new OpenFileDialog(); openfile.Title = "请选择客户端longin的图片"; openfile.Filter = "Login图片(*.jpg;*.bmp;*png)|*.jpeg;*.jpg;*.bmp;*.png|AllFiles(*.*)|*.*"; if (DialogResult.OK == openfile.ShowDialog()) { try { //读成二进制 byte[] bytes = File.ReadAllBytes(openfile.FileName); //直接返这个存储到数据就行了cmd.Parameters.Add("@image", SqlDbType.Image).Value = bytes; //输出二进制 在这里把数据中取到的值放在这里byte[] bytes=(byte[])model.image; pictureBox1.Image = System.Drawing.Image.FromStream(new MemoryStream(bytes)); this.pictureBox1.SizeMode = PictureBoxSizeMode.Zoom; // 如果保存成文件: File.WriteAllBytes(@"d: ext.jpg", bytes); } catch { } } }