thumbnail template

First, the problem scene Generates a 48pxx48px thumbnail for a square picture and saves it as a picture file, but finds that the resulting thumbnail is blurry. The resulting blur thumbnail is as follows: Original picture (300pxx300px, PNG format): System.Drawing.Image is called in the code. Getthumbnailimage () method, the main implementation code is as f

/// /// Image thumbnail Processing/// /// /// /// /// Publicstaticvoid createthumbnailpicture (string srcpath, string destpath, int width, int height){// Obtain the image object of the source image based on the absolute path of the image DiskSystem. Drawing. Image IMG = system. Drawing. image. fromfile (srcpath ); // BMP: the thumbnail bitmap object to be created.Bitmap BMP = new Bitmap (width, height );

I. Technical Overview:1. Ajax does not need to upload images. For more information, see my article (jquery + C # ashx)2. C # Bitmap Processing System. Drawing.3. The latest demo supports IE7, IE8, and Firefox.Ii. How to Deal with thumbnail:Core Method for generating a thumbnail:Createthumbnailpicture////// Image thumbnail Processing///////////////Public static void createthumbnailpicture (string srcpath, string destpath, int width, int height){// Obta

the partition is 400, the height is 300, and then the picture from the coordinates (0,0) from the projection to the picture $image_p, the width of the projection is $new_width, the height is $new_ Height File and Zoom dimensions$imgfile = ' smp.jpg ';$percent = 0.2;Header (' Content-type:image/jpeg ');List ($width, $height) = getimagesize ($imgfile);$newwidth = $width * $percent;$newheight = $height * $percent;$thumb = Imagecreatetruecolor ($newwidth, $newheight);$source = Imagecreat

A total of two equal proportional thumbnail methods can be used for reference One, for the class file, after instantiation can be used Second, for the custom method, relatively lightweight class fileCopy CodeThe code is as follows: $resizeimage = new Resizeimage ("./shawn.jpg", "200", "100", "0", "... /pic/shawnsun.jpg ");Instantiate the following class to generate a thumbnail imageWhere the source file an

Method 1 Using System;Using System. Data;Using System. Configuration;Using System. Web;Using System. Web. Security;Using System. Web. UI;Using System. Web. UI. WebControls;Using System. Web. UI. WebControls. WebParts;Using System. Web. UI. HtmlControls;Using System. IO; Public partial class _ Default: System. Web. UI. Page{Protected void Page_Load (object sender, EventArgs e){ }Protected void button#click (object sender, EventArgs e){If (FileUpload1.HasFile){String fileContentType = FileUpload1.

. This example has an. htaccess file with file upload size and post size and then Inline code for dynamic system memory. Htaccess file:Php_value post_max_size 16 mPhp_value upload_max_filesize 6 m // $ Img_base = base directory structure for thumbnail images// $ W_dst = maximum width of thumbnail// $ H_dst = maximum height of thumbnail// $ N_img = new

In. NET development, you need to get the height and width of the image. The Code is as follows:Protected string imgpath; Protected string fileextname; Private void btnget_click (Object sender, system. eventargs E) ...{ If (upimage. postedfile. filename! = "") ...{ Imgpath = upimage. postedfile. filename; Fileextname = imgpath. substring (imgpath. lastindexof (".") + 1, 3 ); If (fileextname! = "GIF" fileextname! = "Jpg ") ...{ Response. Write ("Select images in GIF and jpg Formats "); } Else .

); } /*************************************** ********* // Function: thumbnail ($ srcimg, $ multiple) // Function: generate a thumbnail // Parameters: // $ Srcimg is required. Source image file name // $ Multiple is optional. The scaling factor. The default value is 2 times, which is reduced to 1/2 of the original one. // Note: Only images in gif, jpg, and png formats are supported. // Example: