.net FileUpload上传图片图片转换二进制,以及保存显示

 1    protected void Button1_Click(object sender, EventArgs e)
 2         {
 3 
 4 
 5             Stream stream = FileUpload1.PostedFile.InputStream;
 6             byte[] photo = new byte[FileUpload1.PostedFile.ContentLength];
 7             stream.Read(photo, 0, FileUpload1.PostedFile.ContentLength);
 8             stream.Close();
 9             
10 
11             System.Drawing.Image a = ByteToImage(photo);
12             string imgname = DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg";
13             string path = "Scripts/" + imgname;
14             a.Save(Server.MapPath(path));
15             this.Image1.ImageUrl = path; 
16          
17         }

--转换方法

 1   //图片转成二进制
 2         public byte[] ImageToBytes(System.Drawing.Image image)
 3         {
 4             ImageFormat format = image.RawFormat;
 5             using (MemoryStream ms = new MemoryStream())
 6             {
 7                 if (format.Equals(ImageFormat.Jpeg))
 8                 {
 9                     image.Save(ms, ImageFormat.Jpeg);
10                 }
11                 else if (format.Equals(ImageFormat.Png))
12                 {
13                     image.Save(ms, ImageFormat.Png);
14                 }
15                 else if (format.Equals(ImageFormat.Bmp))
16                 {
17                     image.Save(ms, ImageFormat.Bmp);
18                 }
19                 else if (format.Equals(ImageFormat.Gif))
20                 {
21                     image.Save(ms, ImageFormat.Gif);
22                 }
23                 else if (format.Equals(ImageFormat.Icon))
24                 {
25                     image.Save(ms, ImageFormat.Icon);
26                 }
27                 byte[] buffer = new byte[ms.Length];
28                 //Image.Save()会改变MemoryStream的Position，需要重新Seek到Begin
29                 ms.Seek(0, SeekOrigin.Begin);
30                 ms.Read(buffer, 0, buffer.Length);
31                 return buffer;
32             }
33         }
34 
35 
36         //二进制转成图片  
37         public System.Drawing.Image ByteToImage(byte[] imgData)
38         {
39             System.IO.MemoryStream ms = new System.IO.MemoryStream(imgData);
40             System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
41             return img;
42         }

.net FileUpload上传图片 图片转换二进制,以及保存显示

.net FileUpload上传图片图片转换二进制,以及保存显示