asp.net in the article thumbnail and add picture information

asp.net| thumbnail image

asp.net in the article thumbnail, and in the picture to add a picture plate and other information

Object defining the Image class
Drawing.image Image,newimage;
Picture path
protected string ImagePath;
Picture type
protected string imagetype;
Picture name
protected string imagename;

Provides a callback method that determines when an image object cancels execution prematurely when performing a build thumbnail operation
Returns True if this method determines that the Getthumbnailimage method should stop in advance;
System.Drawing.Image.GetThumbnailImageAbort callb = null;

private void Sm_click (object sender, System.EventArgs e)
{
String MPath;

if (""!= File1.PostedFile.FileName)//file1 for upload file control
{
ImagePath = File1.PostedFile.FileName;
Get Picture Type
Imagetype= imagepath.substring (Imagepath.lastindexof (".") +1);
Get Picture Name
ImageName = imagepath.substring (Imagepath.lastindexof ("\") +1);
To determine if it is a JPG or GIF picture, here is just an example, not necessarily the two pictures
if ("JPG"!= imagetype && "gif"!= imagetype)
{
Response.Write (' <script language= ' JavaScript ' > alert (' Sorry! Please choose a JPG or GIF format picture! ');</script> ");
Return
}
Else
{
Try
{
Create a virtual path
Mpath=server.mappath ("Uploadfiles");
Save to Virtual path
File1.PostedFile.SaveAs (mpath+ "\" +imagename);

Display artwork, imagesource as Picture control
Imagesource.imageurl = "uploadfiles/" +imagename;

Create a reference for an uploaded picture
Image=system.drawing.image.fromfile (mpath+ "\" +imagename);
Generate thumbnails
Newimage=image. Getthumbnailimage (200,200,callb,new system.intptr ());
Save thumbnails to the specified virtual path
NewImage. Save (Server.MapPath ("uploadfiles") + "\\small" +imagename);
Frees the resources occupied by the image object
Image. Dispose ();
Freeing Resources for NewImage objects
NewImage. Dispose ();
Show thumbnails

Addtexttoimg ("uploadfiles/" + "small" +imagename, "Pic Info"); Add an information description to the picture
Image1.imageurl = "uploadfiles/" + "small" +imagename;

Script.alert ("Upload success!");
}
Catch
{
Script.alert ("Upload failed!");
}

}//End Else
}

Add your own information to the picture,
Addtexttoimg (Physicpath, "Pic Info");
private void Addtexttoimg (string filename,string text)
{
String sss = MapPath (fileName);

if (! File.exists (FileName)) {
throw new FileNotFoundException ("The file don t exist!");
}

You also need to determine whether the file type is an image type, so here's the

   System.Drawing.Image Image = System.Drawing.Image.FromFile (filename);//mappath (filename);
   Bitmap Bitmap = new Bitmap (image,image. Width,image. Height);
   Graphics g = graphics.fromimage (bitmap);

   float fontsize = 22.0f;//font size
   float textWidth = text. Length*fontsize; The length of the text
  //below defines a rectangular area, after which the white background black word is painted in the rectangle
   float rectx = 0;
   float recty = 0;
   Float rectwidth = text. length* (fontsize+18);
   Float rectheight = fontsize+18;
  //declaring rectangular fields
   rectanglef textArea = new RectangleF (rectx,recty,rectwidth,rectheight);
   font font = new Font ("XXFarEastFont-Arial", fontsize);//define Font
   Brush whitebrush = new SolidBrush (color.white); br>   Brush Blackbrush = new SolidBrush (color.black);
   G.fillrectangle (blackbrush,rectx,recty,rectwidth,rectheight);
   g.drawstring (Text,font,whitebrush,textarea);
   MemoryStream ms = new MemoryStream ();
  //Save as JPG type
   bitmap. Save (ms,imageformat.jpeg);

Output processing image, here for demonstration convenience, I will display the picture in the page
/* Response.Clear ();
Response.ContentType = "Image/jpeg";
Response.BinaryWrite (Ms. ToArray ());
*/
FileStream fs=new FileStream (FileName, FileMode.OpenOrCreate); CREATENEW);
Fs. Write (Ms. ToArray (), 0,ms. ToArray (). Length);
Fs. Close ();

Image1.imageurl = FileName; Display a picture in an image control
G.dispose ();
Bitmap. Dispose ();
Image. Dispose ();
}