如何使用现有网站的现有搜索文本框并获取结果? [英] How do i use an existing search textbox of an existing website and get the results?

问题描述

大家好.

我想从具有搜索框和按钮的网站上获得一些结果，我该怎么做?

这是一个使用PHP的新闻文章网站，我想搜索一个值并找回标题并在我的c#Windows应用程序中使用它们.

网站地址中没有参数和值.

我已经尝试了一些方法，但是我真的不知道该怎么做.

我只想说我是为个人使用而做的，我只想每周一次，但要以一种自动化的方式来搜索一个值，以这种方式，当我得到我感兴趣的结果时，我会让我的应用程序向我发送电子邮件.

到目前为止，我从网站上得到的是:

Hi guys..

I would like to get some results from a website that has a search box and a button, how could i do that?

It''s a news articles website in PHP and i would like to search for a value and get the titles back and use them in my c# windows application.

there are no parameters and values in the address of the website.

i have tried some things but i really don''t know how to do it..

let me just mention that i am doing it for my personal use and i only want to search for one value one time a week but in an automated way and in that way when I''ll have the results that i am interested of i would make my app send me an e-mail.

so far what i got from the website is this:

<form method="post" action="findnews.php">
<input align="left" size="32" name="search"/>
<input type="submit" value="new search" style="width: 80px;"/>
</form>

我该如何为搜索赋予自己的价值，并以文本或其他形式获得结果?

我是网络编码方面的新手..

我将不胜感激..

谢谢！

罗伊.

修订:

多亏阿比舍克的建议，我才开始努力.
虽然看起来还是有问题.

同时，我正在获取页面本身的源代码，而不是结果.

问题可能在这行:

how could i put my own value for the search and get the results as text or something?

I am kind of a Newbie as for web coding..

I will appreciate any help..

Thank you!

Roy.

Revision:

Thanks to Abishek''s advice i got someting going..
though it still seems as i have a problem.

meanwhile i am getting the source code for the page itself and not the results.

the problem may be in this line:

myWebClient.Headers.Add("search", "application/x-www-form-urlencoded");

我试图定义此行来处理页面上的搜索框，但是我不确定这是否是正确的放置位置..

我不太确定如何配置这条线，并且在MS网站上找不到任何材料来解决它..

现在的问题是:如何使用搜索框?

如果您能看一下，我将不胜感激.
这是我的C#win应用程序.

I have tried to define this line to handle the search box on the page but i am not sure if this is the correct place to do it..

I am not really sure how to configure this line and couldn''t find any material on MS sites for figuring it out..

the question now is: How do i make use of the search box?

I will appreciate if you''ll have a look..
This is my C# win application..

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;

namespace WinFindNews
{
    public partial class Form1 : Form
    {
        public WebHeaderCollection Headers { get; set; }
        public Form1()
        {
            InitializeComponent();

        string uriString;
            uriString = "http://thedomain.com/findnews.php";

            // Create a new WebClient instance.
            WebClient myWebClient = new WebClient();
            string postData = "test query";
            //myWebClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
            myWebClient.Headers.Add("search", "application/x-www-form-urlencoded");

            // Display the headers in the request
            richTextBox1.AppendText("Resulting Request Headers: ");
            richTextBox1.AppendText(myWebClient.Headers.ToString());

            // Apply ASCII Encoding to obtain the string as a byte array.

            byte[] byteArray = Encoding.ASCII.GetBytes(postData);
            //Console.WriteLine("Uploading to {0} ...", uriString);
            // Upload the input string using the HTTP 1.0 POST method.
            byte[] responseArray = myWebClient.UploadData(uriString, "POST", byteArray);

            // Decode and display the response.
            //Console.WriteLine("\nResponse received was {0}",
            //Encoding.ASCII.GetString(responseArray));
            richTextBox1.AppendText(Encoding.ASCII.GetString(responseArray));
        }
        }
    }

谢谢!!!

Roy.

Thank you!!!

Roy.

推荐答案

在我看来，PHP正在处理搜索.如果它不支持任何RSS/atom/web服务.使用搜索"字段&在findnews.php上执行http POST请求.它的价值.查看WebRequest&的示例WebClient.因此，您将知道如何实现这一目标.收到响应后，就可以使用Regex来获取结果.

结帐 http://msdn.microsoft.com/en-us/library/system .net.webclient.headers.aspx [ ^ ]

To me it looks like PHP is handling the search. If it does not support any RSS/atom/web services. Do a http POST request on the findnews.php with "search" field & a value to it. Check out examples of WebRequest & WebClient. So you will know how to achive this. Once you get a response, you use Regex to grab the results.

Checkout http://msdn.microsoft.com/en-us/library/system.net.webclient.headers.aspx[^] for example

非常感谢！我会尝试一下，看看它会把我引向何方.

谢谢!!!!

罗伊.

我已经做了一些工作，但是仍然有问题，请再次查看该问题.

谢谢!!!

Roy.

Thanks a lot! i will try that and see where it leads me..

Thanks!!!!

Roy.

I have made something work but still have proplem, please review the question again..

Thanks!!!

Roy.

如果模拟一个Web请求，您将得到一个Web响应，该响应不是PHP代码，而是HTML. Web服务器假定您是Web浏览器，因此它将发送HTML.您将需要解析它.

好的-在我看来，您的要求没有正确建立.如果您向我们展示了您得到的答复，这可能会有所帮助，但是我认为您需要正确地构建您的帖子数据.我不确定它采用什么格式，但我怀疑它的变量名=值，其中变量名是搜索框的名称.

抱歉，我刚刚在帖子开头发现了:mad:图标，我不是故意要把它放在那儿.抱歉给您留下任何错误的印象.

If you simulate a web request, you will get a web response, which will not be PHP code, but it WILL Be HTML. The web server assumes you are a web browser, and so it sends HTML. You will need to parse it.

OK - it doesn''t look to me like you''re building your request properly. It would perhaps help if you showed us the response you''re getting, but I think you need to build your post data correctly. I am not sure what format it takes, but I suspect it''s variablename=value, where variablename is the name of the search box.

I am sorry, I just spotted the :mad: icon at the start of my post, I didn''t mean to put that there. Sorry for any wrong impression.

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