How to use C # To collect web page information,

How to use C # To collect web page information,

The Internet has a huge amount of resource information, and information from all walks of life is at a loss. Webpage information collection is to obtain webpage data, and then extract useful data through program analysis. One part of the search engine's work is webpage data extraction. For example, compiling a program to extract the news title from xinlang news channel is a kind of webpage data extraction.

There are many ways to obtain webpage data. The web page information collector can easily collect information about a website. For example, the E-MAIL list of all registered members of a forum, the enterprise list of an industry site, a download site on all Software List and so on. This article introduces the C # web page information collection method in combination with examples. The examples summarize three common methods, which are very practical. For more information, see. The following describes how to obtain webpage content through HttpWebResponse, WebResponse, and WebClient. The specific implementation method is as follows:

1. Get it through HttpWebResponse

This is a common way to obtain data.

2. Obtain through WebResponse

This is a relatively simple way to obtain data. Match the following code:

3. Obtain from WebClient

This is a simple way to obtain data. Of course, other methods are also very simple. The first thing to note here is that if you want to consider the efficiency of your project, you need to allocate a memory area in the function. The syntax is as follows:

Conclusion:

The above is the core code for data collection. This seemingly amazing feature is a combination of common functions. In fact, it is not difficult to analyze them carefully, as long as you can study it carefully, it is not difficult to collect webpage information! At the same time, I hope this article will help you with C # programming.