Front desk:
<HTML>
<HEAD>
<title>WebForm3</title>
</HEAD>
<body>
<form id= "Form1" method= "POST" runat= "Server" >
<input id= "loadfile" type= "file" runat= "Server" >
<asp:button id= "Button1" runat= "Server" text= "button" ></asp:Button><BR>
<asp:image id= "Image1" runat= "Server" ></asp:Image></form>
</body>
</HTML>
Background CS Code:
1/**////<summary>
2///Generate thumbnails
3///</summary>
4///<param name= "FileName" > Original file </param>
5///<param name= "width" > Breadth </param>
6///<param name= "height" > Altitude </param>
7 private void Createthumbnailimage (string filename,string smallpath,int width,int height)
8 {
9//Copyright information
A string stradd = "www.wander.com";
11//generated thumbnail name = Month Day + File size (prevent the same file name)
A string newfilename = Smallpath;
13
System.Drawing.Image Image,newimage;
15//Load the original image
Image = System.Drawing.Image.FromFile (Server.MapPath (fileName));
17//Callback
System.Drawing.Image.GetThumbnailImageAbort callb = new System.Drawing.Image.GetThumbnailImageAbort (Callbac k);
19//Generate thumbnails
NewImage = image. Getthumbnailimage (Width,height,callb,new system.intptr ());
21st
Addinfo (newimage,stradd,newfilename,16);
23
Image. Dispose ();
Newimage.dispose ();
26
Image1.imageurl = NewFileName;
28}
29
/**////<summary>
31///Add copyright information
///</summary>
///<param name= "image" ></param>
///<param name= "Stradd" ></param>
///<param name= "NewFileName" ></param>
///<param name= "FontSize" ></param>
Notoginseng private void Addinfo (System.Drawing.Image image,string stradd,string newfilename,int fontsize)
38 {
Response.Clear ();
Bitmap B = new Bitmap (image);
Graphics g = graphics.fromimage (b);
g.DrawString (stradd,new Font ("XXFarEastFont-Arial", FontSize), New SolidBrush (color.red), image. width/2-80, image. HEIGHT-30);
B.save (Server.MapPath (NewFileName), System.Drawing.Imaging.ImageFormat.Gif);
44}
45
The private bool CallBack ()
47 {
return true;
49}
50
Wuyi private void Button1_Click (object sender, System.EventArgs e)
52 {
if (loadfile.postedfile!= null)
54 {
55//Judgment is not image file
if (loadFile.PostedFile.ContentType.ToLower). IndexOf ("image") < 0)
57 {
58//File type error
59}
Or else
61 {
The string ext = loadFile.PostedFile.FileName.Substring (LoadFile.PostedFile.FileName.LastIndexOf (".") );
63//Generate new Original file name Date + file size + extension
$ string Path = "Uploads\\" + System.DateTime.Now.Date.ToShortDateString () + LoadFile.PostedFile.Conte Ntlength.tostring () + ext;
65//Plus the copyright information file
$ string NewPath = "Uploads\\" + System.DateTime.Now.Date.ToShortDateString () + LoadFile.PostedFile.Co Ntentlength.tostring () + "new" + ext;
67//Thumbnail file name
The string newfilename = "Uploads\\" + System.DateTime.Now.Date.ToShortDateString () + Loadfile.postedfil E.contentlength.tostring () + "small.gif";
69//Upload Artwork
LoadFile.PostedFile.SaveAs (Server.MapPath (path));
71//Generate thumbnails
Createthumbnailimage (path,newfilename,200,300);
73
74//to the original artwork plus copyright information
System.Drawing.Image Image = System.Drawing.Image.FromFile (Server.MapPath (path));
Addinfo (Image, "www.wander.com", newpath,20);
The image. Dispose ();
78}
79}
80}
In fact, to change the copyright information to the watermark is also very simple, only need to modify the Addinfo method can
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