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Images and related processing in the online world

Source: Internet
Author: User
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Content summary

In this lecture, I explained the formats of images in the online world and their characteristics.

  1. JPG or JPEG
  2. GIF
  3. PNG

At the same time, we also explained three common strategies for improving the speed of displaying images on webpages through examples.

  1. According to the 80/20 rule, a small image is displayed first. A large image is displayed only when necessary.
  2. Load large images using asynchronous loading
  3. Uses the delayed loading policy to implement more intelligent loading methods.

 

Handout address

Https://skydrive.live.com/redir.aspx? Cid = bb01f26f28894a40 & resid = BB01F26F28894A40! 127 & parid = BB01F26F28894A40! 111

 

Video address

Http://www.tudou.com/programs/view/HWLDk95bBf8/

 

Sample Code (asynchronously loading images)

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

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