I have been making some progress on this but still have some issues to resolve.
Hopefully, this one won't be that hard.
I have this:
For Each item In Request.QueryString("doc").Split(","c)
sb.Append("http://default.html?k=")
sb.Append(item)
sb.Append("&p=2&o=m</p>")
Next
When I test this code:
Response.Write(sb.ToString())
I get:
http://default.html?k=122&p=2&o=m
http://default.html?k=123&p=2&o=m
That's exactly what we are looking for
When we assign it to a variable like:
Dim linkList As String = sb.ToString()
However, when I loop through linkList
and write it to the screen, it is spitting out only the letter h.
Any ideas what I am doing wrong and how to fix it if possible?
Dim link As String
For Each link I linkList
'let me know if I am still getting the links
response.write link
'we will save all the links later
Next
As always, thanks a lot for your help
You can not loop through a string and get another string (note: linkList is a String - Dim linkList As String = sb.ToString()). That's why you get the h it's trying to pick the Chars in the string. Place the strings in an array then loop through the array. Try this:
Dim linkArray() As String
For Each item In Request.QueryString("doc").Split(","c)
Dim stb As New StringBuilder
stb.Append("http://default.html?k=")
stb.Append(item)
stb.Append("&p=2&o=m</p>")
linkArray.add(stb.toString())
Next
For Each link As String In linkArray
response.write link
Next
It looks like you are not closing your <a> tag
&p=2&o=m</p>
Notice the </p> to close a paragraph without the closing <a> tag with </a>.
Try to view source and you'll probably see the HTML is malformed in that way.
Related
Ive been trying to get this value from wb forever now.. And can't do it.
What I am trying to get is "388399"
However "ember557" changes constantly to "ember'random number'" and the class is not unique.
<div id="ember557" class="ember-view">388399</div>
Maybe you could try to get it with the CLASS instead of the ID
you can call GetElementByTagName and then iterate through this to find the element of the relevant class
And if that doesnt work then you could also try to use regex to get the string you want. Then replace the unwanted characters.
Dim myString As String = "your html string here"
Dim regex = New Regex("<div id=""ember[0-9]*"" class=""ember-view"">[0-9]*</div>")
Dim match = regex.Match(myString)
If match.Success Then
'replace the unwanted characters.
End If
I'm trying to write the content of my textbox to a txt file.
My code works fine but my error is, when I open txt file I see
writeline1writeline2writeline3
instead of
writeline1
writeline2
writeline3
my code;
result As List(Of String) = New List(Of String)
convertedText.Lines = result.ToArray()
My.Computer.FileSystem.WriteAllText(mypath & "\convertedcontent.txt", convertedText.Text, False)
Writing to .csv and many other file types work fine but I don't know how to break lines for text file.
Thanks in advance
I would use System.IO.File.WriteAllLines:
Dim path = System.IO.Path.Combine(mypath, "convertedcontent.txt")
System.IO.File.WriteAllLines(path, result)
Otherwise you need to append Environment.NewLine to each line, you can use String.Join:
System.IO.File.WriteAllText(path, String.Join(Environment.NewLine, result))
You need to add & vbCrLf to your strings (each line)
Not sure where you are getting your strings from.. but you will have to add the carrier return/Line Feed character to those strings, one at the end of every string.
Might just even loop through your array and add them there?
P.S. Some of the comments have quicker ways of getting there, but this is probably what happens behind the scenes...
for i = 0 to convertedText.Lines.count -1
convertedText.Lines(i) += vbCrLf
next
please how can i pass a link with function which take an id from a function please
Dim Email As String = "ultimadan#hotmail.com"
Dim msgBody As New StringBuilder()
msgBody.Append("Thank you, please click the link below.")
msgBody.Append("<a href=http://localhost:49789/Seller/Part1/Default.aspx?" & GetUserID(Email))
It looks like you're just not building the complete anchor tag. You're missing a key for the query string value, you're not closing the tag, etc. Your current code might produce something like:
<a href=http://localhost:49789/Seller/Part1/Default.aspx?123
Which isn't complete or valid HTML. Did you mean something more like this?:
msgBody.Append(
"<a href=""http://localhost:49789/Seller/Part1/Default.aspx?userid="
& GetUserID(Email)
& """>click here</a>"
)
Which should produce something more like:
click here
I am working with a Windows form application. I have a textbox called "tbPhoneNumber" which contains a phone number.
I want to go on the website http://canada411.com and enter in the number that was in my textbox, into the website textbox ID: "c411PeopleReverseWhat" and then somehow send a click on "Find" (which is an input belonging to class "c411ButtonImg").
After that, I want to retrieve what is in between the asterixs of the following HTML section:
<div id="contact" class="vcard">
<span><h1 class="fn c411ListedName">**Full Name**</h1></span>
<span class="c411Phone">**(###)-###-####**</span>
<span class="c411Address">**Address**</span>
<span class="adr">
<span class="locality">**City**</span>
<span class="region">**Province**</span>
<span class="postal-code">**L#L#L#**</span>
</span>
So basically I am trying to send data into an input box, click the input button and store the values retrieved into variables. I want to do this seemlessly so I would need to do something like an HTTPWebRequest? Or do I use a WebBrowser object? I just don't want the user to see that the application is going on a website.
I do a good amount of website scraping and I will show you how I do it. Feel free to skip ahead if I am being too specific, but this is a commonly requested theme and should be made specific.
URL Simplification
The library I use for this is htmlagilitypack (It is a dll, make a new project and add a reference to it). The first thing to check is if we have to go to take any special steps to get to a page by using a phone number. I searched for John Smith and found quite a few. I entered 2 of these results and noticed that the url formatting is very simple. Those results were..
http://www.canada411.ca/res/7056736767/John-Smith/138223109.html
http://www.canada411.ca/res/7052355273/John-Smith/172439951.html
I tested to see if I can remove some of the values from the url that I don't know and just leave the phone number. The result was that I can...
http://www.canada411.ca/search/re/1/7056736767/-
http://www.canada411.ca/search/re/1/7052355273/-
You can see by the url that there are some static areas in the url and our phone number. From this lets construct a string for the url.
Dim phoneNumber as string = "7056736767" 'this could be TextBox1.Text or whatever
Dim URL as string = "http://www.canada411.ca/search/re/1/" + phoneNumber +"/-"
Value Extraction with XPath
Now that we have the page dialed in, lets examine the html you provided above. You need 6 values from the page so we will create them now...
Dim FullName As String
Dim Phone As String
Dim Address As String
Dim Locality As String
Dim Region As String
Dim PostalCode As String
As mentioned above, we will be using htmlagilitypack which uses Xpath. The cool thing about this is that once we can find some unique identifier in the html, we can use Xpath to find our values. I know it may be confusing, but it will become clearer.
All of the values you need are within tags that have a class name. Lets use the class name in our Xpath to find them.
Dim FullNameXPath As String = "//*[#class='fn c411ListedName']"
Dim PhoneXPath As String = "//*[#class='c411Phone']"
Dim AddressXPath As String = "//*[#class='c411Address']"
Dim LocalityXPath As String = "//*[#class='locality']"
Dim RegionXPath As String = "//*[#class='region']"
Dim PostalCodeXPath As String = "//*[#class='postal-code']"
Essentially what we are looking at is a string that will inform htmlagilitypack what to look for. In our case, text contained within the classes we named. There is a lot to XPath and it could take a while to explain all of it. On a side note though...If you use Google Chrome and highlight a value on a page, you can right click inspect element. In the code that appears below, you can right click the value and copy to XPath!!! Very useful.
Basic HTMLAgilityPack Template
Now, all that is left is to connect to the page and get those variables populated.
Dim Web As New HtmlAgilityPack.HtmlWeb
Dim Doc As New HtmlAgilityPack.HtmlDocument
Doc = Web.Load(URL)
For Each nameResult As HtmlAgilityPack.HtmlNode In Doc.DocumentNode.SelectNodes(FullNameXPath)
Msgbox(nameResult.InnerText)
Next
In the above example we create an HtmlWeb object named Web. This is the actual crawler of our project. We then define a HtmlDocument which will consist of our converted and searchable page source. All of this is done behind the scenes. We then send Web to get the page source and assign it to the Doc object we created. Doc is reusable, which thankfully requires us to connect to the page only once.
The for loop looks for any nodes in our Doc that match FullNameXPath which was defined previously as the XPath value for finding the name. When a Node is found, it is assigned to the nameResult variable and from within the loop we call a message box to display the inner text of our node.
So when we put it all together
Complete Working Code (As of 2/17/2013)
Dim phoneNumber As String = "7056736767" 'this could be TextBox1.Text or whatever
Dim URL As String = "http://www.canada411.ca/search/re/1/" + phoneNumber + "/-"
Dim FullName As String
Dim Phone As String
Dim Address As String
Dim Locality As String
Dim Region As String
Dim PostalCode As String
Dim FullNameXPath As String = "//*[#class='fn c411ListedName']"
Dim PhoneXPath As String = "//*[#class='c411Phone']"
Dim AddressXPath As String = "//*[#class='c411Address']"
Dim LocalityXPath As String = "//*[#class='locality']"
Dim RegionXPath As String = "//*[#class='region']"
Dim PostalCodeXPath As String = "//*[#class='postal-code']"
Dim Web As New HtmlAgilityPack.HtmlWeb
Dim Doc As New HtmlAgilityPack.HtmlDocument
Doc = Web.Load(URL)
For Each nameResult As HtmlAgilityPack.HtmlNode In Doc.DocumentNode.SelectNodes(FullNameXPath)
FullName = nameResult.InnerText
MsgBox(FullName)
Next
For Each PhoneResult As HtmlAgilityPack.HtmlNode In Doc.DocumentNode.SelectNodes(PhoneXPath)
Phone = PhoneResult.InnerText
MsgBox(Phone)
Next
For Each ADDRResult As HtmlAgilityPack.HtmlNode In Doc.DocumentNode.SelectNodes(AddressXPath)
Address = ADDRResult.InnerText
MsgBox(Address)
Next
For Each LocalResult As HtmlAgilityPack.HtmlNode In Doc.DocumentNode.SelectNodes(LocalityXPath)
Locality = LocalResult.InnerText
MsgBox(Locality)
Next
For Each RegionResult As HtmlAgilityPack.HtmlNode In Doc.DocumentNode.SelectNodes(RegionXPath)
Region = RegionResult.InnerText
MsgBox(Region)
Next
For Each postalCodeResult As HtmlAgilityPack.HtmlNode In Doc.DocumentNode.SelectNodes(PostalCodeXPath)
PostalCode = postalCodeResult.InnerText
MsgBox(PostalCode)
Next
Yes it is possible, I've done this using the selenium framework, which is aimed for testing automation. However, it provides you with the tools to do exactly that.
Download for .net here:
http://docs.seleniumhq.org/download/
I need to get some text from this web page. I want to use the trade feed for my program to analyse the sentiment of the markets.
I used the browser control and the get element command but its not working. The problem is that whenever my browser starts to open the page I get Java scripts errors.
I tried with DOM but seems that i dont quite understand what i need to do :)
Here is the code:
Dim code As String
Using client As New WebClient
code = client.DownloadString("http://openbook.etoro.com/ahanit/#/profile/Trades/")
End Using
Dim htmlDocument As IHTMLDocument2 = New HTMLDocument(code)
htmlDocument.write(htmlDocument)
Dim allElements As IHTMLElementCollection = htmlDocument.body.all
Dim allid As IHTMLElementCollection = allElements.tags("id")
Dim element As IHTMLElement
For Each element In allid
element.title = element.innerText
MsgBox(element.innerText)
Next
Update: So I tried the HTML Agility pack, as suggested in the comments, and I am stuck again on this code
Dim plain As String = String.Empty
Dim htmldoc As New HtmlAgilityPack.HtmlDocument
htmldoc.LoadHtml("http://openbook.etoro.com/ahanit/#/profile/Trades/")
Dim goodnods As HtmlAgilityPack.HtmlNodeCollection = htmldoc.DocumentNode.SelectNodes("THE PROBLEM")
For Each node In goodnods
TextBox1.Text = htmldoc.DocumentNode.InnerText
Next
Any advice what to now?
Ok I think I know what the problem is somehow the div that I need is hidden and its not loaded when I load the web page just the source code. Does someone knows how to load all the hidden divs ??
Here is my new code
Dim doc As New HtmlAgilityPack.HtmlDocument
Dim web As New HtmlWeb
doc = web.Load("http://openbook.etoro.com/ahanit/#/profile/Trades/")
Dim nodes As HtmlNode = doc.GetElementbyId("feed-items")
Dim id As String = nodes.WriteTo()
TextBox1.Text = TextBox1.Text & vbCrLf & id
user1336635,
Welcome to SO! Something you might try is to check out his source code, figure out what javascript function is populating the field you want (using firebug - I assume it's the one that "trades result in profit" next to it), and then embedding that script into a web page that your webbrowser control loads. That's where I'd try to start. I checked his source code and searched for "trades result in profit" and didn't find anything which leads me to believe hunting for the element 'might' not be possible. Just a starting place until someone with more experience with this chimes in!! Best!
-sf