使用C＃从HTML页面提取字符串

Question

I have a source html page and I want to do the following:

1. extracting a specific string from the whole html page and save the new choosing string in a new html page.
2. creating a database on MySQL with 4 columns.
3. importing the data from the html page to the table on MySql.

I would be pretty thankful and grateful if someone could help me in that cause I have no that perfect knowledge of using C#.

Answer 1

You could use this code :

HttpClient http = new HttpClient();

//I have put Ebay.com. you could use any.
var response = await http.GetByteArrayAsync("ebay.com"); 
String source = Encoding.GetEncoding("utf-8").GetString(response, 0, response.Length - 1);
source = WebUtility.HtmlDecode(source);
HtmlDocument Nodes = new HtmlDocument();
Nodes.LoadHtml(source);

In the Nodes object, you will have all the DOM elements in the HTML page .

You could use linq to filter out whatever you need.

Example :

List<HtmlNode> RequiredNodes = Nodes.DocumentNode.Descendants()
                                    .Where(x => x.Attributes["Class"].Contains("List-Item")).ToList();

You will probably need to install Html Agility Pack NuGet or download it from the link.

hope this helps.