从网站解析数据 [英] Parse Data from web site

问题描述

大家好，我正在尝试解析网站上的数据，我收到一个字符串，如



                                   + 9％



来自这些我只需要（9）如何将此数字检索到变量？

我使用修剪，删除和其他功能，他们正在为字符串工作，但在这里他们不工作，现在为什么。



这是我正在使用的代码：



WebClient wc =新的WebClient（）;

string htmlString = wc.DownloadString（http://sentra.com.gr/index.php?option = com_content& view = article& id = 3291：rekor-times-oloklirothike-dimoprasia-kopenhagen-fur-dekembrios-2012& catid = 75：auction& Itemid = 141）;



string price =;

匹配mprice = Regex.Match（htmlString，@

Chinchilla（。*？）

Hi guys, I'm trying to parse data from a website and I'm receiving a string like

                                 +9%

from these I just need (9) how can I retrieve this number to a variable?
I use Trim, Remove and other functios that they are working for strings but here they are not working and now why.

Here is the code that I'm using:

WebClient wc = new WebClient();
string htmlString = wc.DownloadString("http://sentra.com.gr/index.php?option=com_content&view=article&id=3291:rekor-times-oloklirothike-dimoprasia-kopenhagen-fur-dekembrios-2012&catid=75:auction&Itemid=141");

string price = "";
Match mprice = Regex.Match(htmlString, @"

Chinchilla(.*?)

，RegexOptions。单线）;

if（mprice.Success）

{

price = mCountry.Groups [1] .Value;

TextBox1.Text = price;

airplaneCountry.Remove（0,81）;

Console.Write线（airplaneCountry）;

// res.Text =价格;

}

price = Regex.Replace（价格，（。* ？）>，）。Trim（）;

TextBox2.Text =价格;





thnx提前

Jason

", RegexOptions.Singleline);
if (mprice.Success)
{
price = mCountry.Groups[1].Value;
TextBox1.Text = price;
airplaneCountry.Remove(0,81);
Console.WriteLine(airplaneCountry);
// res.Text = price;
}
price = Regex.Replace(price, "(.*?)>", "").Trim();
TextBox2.Text = price;


thnx in advance
Jason

推荐答案

根据您的字符串类型而定处理，以及你正在抓取：你可能使用不同策略的信息类型。



如果你只想要数字，写一个RegEx除去数字之外的一切。类似于：

Depending on what type of strings you are processing, and what types of information you are "scraping:" you might use different strategies.

If you want only numbers, write a RegEx that removes everything but numbers. Something like:

YourString = Regex.Replace(YourString, "[^0-9.]", "");

就你的例子而言：+ 9％ ：只需要删除百分号以获得有效整数：

In the case of your example : "+9%" : only the percent sign needs to be removed to get a valid integer:

private int i;
private bool IsNumber;

private string n = "+9%";

private void SomeMethod(string testString)
{
    n = n.TrimEnd('%');

    IsNumber = Int32.TryParse(n, out i);

    if (IsNumber)
    {
        // code to handle the valid number
        // in the variable i
    }
}

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