使用C#从网站读取数据 [英] Reading data from a website using C#

问题描述

我有一个网页，除了一些字符串之外，什么都没有.没有图像，没有背景色或其他任何东西，只有一些长度不那么长的纯文本.

I have a webpage which has nothing on it except some string(s). No images, no background color or anything, just some plain text which is not really that long in length.

我只是想知道，什么是在网页中传递字符串的最佳方式(我的意思是最快，最有效)，以便我可以将其用于其他用途(例如，在文本框中显示)?我知道WebClient，但是我不确定它是否会按照我想要的去做，而且我什至不想尝试它，即使它确实起作用了，因为我上次这样做大约花了30秒一个简单的操作.

I am just wondering, what is the best (by that, I mean fastest and most efficient) way to pass the string in the webpage so that I can use it for something else (e.g. display in a text box)? I know of WebClient, but I'm not sure if it'll do what I want it do and plus I don't want to even try that out even if it did work because the last time I did it took approximately 30 seconds for a simple operation.

任何想法都会受到赞赏.

Any ideas would be appreciated.

推荐答案

WebClient类应具有处理您描述的功能的能力，例如:

The WebClient class should be more than capable of handling the functionality you describe, for example:

System.Net.WebClient wc = new System.Net.WebClient();
byte[] raw = wc.DownloadData("http://www.yoursite.com/resource/file.htm");

string webData = System.Text.Encoding.UTF8.GetString(raw);

或(进一步来自Fredrick在评论中的建议)

or (further to suggestion from Fredrick in comments)

System.Net.WebClient wc = new System.Net.WebClient();
string webData = wc.DownloadString("http://www.yoursite.com/resource/file.htm");

当您说花了30秒时，您可以再扩展一点吗?有许多原因可以说明为什么会发生这种情况.缓慢的服务器，互联网连接，狡猾的实现方式等.

When you say it took 30 seconds, can you expand on that a little more? There are many reasons as to why that could have happened. Slow servers, internet connections, dodgy implementation etc etc.

您可以再降低一个级别，并实现类似这样的功能:

You could go a level lower and implement something like this:

HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create("http://www.yoursite.com/resource/file.htm");

using (StreamWriter streamWriter = new StreamWriter(webRequest.GetRequestStream(), Encoding.UTF8))
{
    streamWriter.Write(requestData);
}

string responseData = string.Empty;
HttpWebResponse httpResponse = (HttpWebResponse)webRequest.GetResponse();
using (StreamReader responseReader = new StreamReader(httpResponse.GetResponseStream()))
{
    responseData = responseReader.ReadToEnd();
}

但是，最终，WebClient类为您包装了此功能.因此，我建议您使用WebClient并调查30秒延迟的原因.

However, at the end of the day the WebClient class wraps up this functionality for you. So I would suggest that you use WebClient and investigate the causes of the 30 second delay.

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