Creating image thumbnails in ASP.NET

1: using System;

2: using System.Configuration;

3: using System.Data;

4: using System.Linq;

5: using System.Web;

6: using System.Web.Security;

7: using System.Web.UI;

8: using System.Web.UI.HtmlControls;

9: using System.Web.UI.WebControls;

10: using System.Web.UI.WebControls.WebParts;

11: using System.Xml.Linq;

12:

13: public partial class _Default : System.Web.UI.Page

14: {

15: protected void Page_Load(object sender, EventArgs e)

16: {

17:

18: }

19: protected void Button1_Click(object sender, EventArgs e)

20: {

21: string target = Server.MapPath("~/Upload");

22: System.Drawing.Image.GetThumbnailImageAbort thumbnailImageAbortDelegate

= new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);

23: if (FileUpload1.HasFile)

24: {

25: FileUpload1.SaveAs(System.IO.Path.Combine(target,

FileUpload1.FileName));

26: using (System.Drawing.Bitmap originalImage = new

System.Drawing.Bitmap(FileUpload1.PostedFile.InputStream))

27: {

28: using (System.Drawing.Image thumbnail =

originalImage.GetThumbnailImage(80, 80, thumbnailImageAbortDelegate, IntPtr.Zero))

29: {

30: thumbnail.Save(System.IO.Path.Combine(target, "thumb_" +

FileUpload1.FileName));

31: }

32: }

33: Image1.ImageUrl = "Upload/" + FileUpload1.FileName;

34: Image2.ImageUrl = "Upload/" + "thumb_" + FileUpload1.FileName;

35: }

36: }

37: public bool ThumbnailCallback()

38: {

39: return false;

40: }

41: }

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