VS 2010 - How To Retrieve HTML From Website
Dec 22, 2010
I need to create a VB.net app that automatically reads a html table. It should connect to a web address (eg "[URL]") and read it. I'll be happy if I could just get the full HTML. I was able to use this code to get the HTML of a regular website:
Dim strReply As String = "NULL"
Dim objHttpRequest As HttpWebRequest
Dim objHttpResponse As HttpWebResponse
objHttpRequest = HttpWebRequest.Create("[URL]")
objHttpResponse = objHttpRequest.GetResponse
Dim objStrmReader As New StreamReader(objHttpResponse.GetResponseStream)
strReply = objStrmReader.ReadToEnd()
This code sample will give me the HTML for the website [URL]. However it will not work with the website I want (eg "[URL]"), because when you access it via regular browser it will popup a browser dialog asking for credentials (user / pass). So when I run the code above for it, I'll get the exception:
The remote server returned an error: (407) Proxy Authentication Required.
How do I set this up to use the credentials, before retrieving the HTML? This is actually my first web-related app.
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Dec 2, 2011
I have a small market place in my website so I want to development a small app for retrieve and check data for example find a transaction or the email of a client and to show this data in a datagridview, this the the html code of a transaction :
[Code]...
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Sep 21, 2009
I wanted to make a program where it will retrieve data from websites I use regularly and display important parts to me such as my horoscope, friends online, new emails etc. I'm just having a problem figuring out how to get visual basic to display the website information.
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Apr 4, 2011
I want to retrieve data from a this link:
[URL]
I have used this code:
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
[Code]....
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Mar 5, 2011
In a VB.NET Program
How can i set a message bar, to automatically retrieve the RSS feed from a website?
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Dec 18, 2009
I'd like my application to retrieve a list of directories, sub-directories, and files from a URL (URL has no index page). Is that possible? I've been searching, but all I can seem to find is how to list directories and such on a system drive.
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Dec 31, 2010
I'm able to create a List(Of String) containing a local directory structure of a LOCAL folder. I'm wondering how I would go about getting this structure for a website, in order to get a listing of all files of a particular type (for example: all .html files)
Something along the lines of what Xenu does would be perfect, but I don't know how to get started. I was thinking of doing something with parsing out "/" of the URL, but then you'd need to know the "deepest" file that exists on the site.. which you won't know...
Is there a way to get a folder listing of each directory of a site without having FTP access or something? (I'm assuming no due to security risks)
My only other option would be to crawl all hyperlinks within the site, and storing all the "internal" ones, but I don't know how to set up that loop, or how to know when it has reached the "deepest" level.
Kinda like when you delete a remote folder from FileZilla, it will traverse all sub-diretories first and delete those files.
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Oct 23, 2009
How can you programmatically get a websites inner html? I found a way of getting the html of a site, but dont know how to get the inner html.
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Apr 15, 2009
Need to connect & retrieve from SQL DB in aspx page using vbscript server side. I have an html page which I want to edit by adding information from a SQL database & display results on and in the html page (code below). Initially thought of using server side javascript but unsuccessful, can this be done using vbscript?
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Mar 5, 2012
I would like to ask a question with SchDocVW Internet explorer control.I added the reference "Microsoft Internet Controls" forum. [code]Could anyone give a known-good working example of how SHDocVW can be used to retrieve HTML contents reliably using VB?
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Oct 19, 2005
In VB.NET 2005, what is the best way to retrieve and parse HTML data from a URL, a bit like a search engine crawler?I am building an app, where I need to parse a website, and collate data from it (the website uses some tags that I could pull out to get the appropriate bits of data). I want to be able to do this in a thread, and just update a DB with the data, and give the client app a status update of the progress.
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Sep 21, 2011
How would I generate a list of html element names from a website/document that is being displayed in WebBrowser1?
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Jun 10, 2011
How can I retrieve info from a HTML table like this :
[Code]...
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Mar 27, 2009
I'm using the following code to retrieve a URL and then parse the HTML from the page:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStart.Click
Dim Temp As String, searchstr As String
[Code]....
I think my problem is that I don't exactly understand how I am supposed to start and end the parsing. I know that in my above code, the "meta" tag is the start and the chr(34), double quotes, is the ending.
When I modify my code, I have price line, which in th html ends with another character, the ">" sign. In the first code, the "content" tag doesn't end with another character, it just continues the line, which is easy and it works.
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Mar 22, 2011
I've a HTML page and i need to pass some value to my aspx page.
Since the url got a maximum length 256, i need to use <param /> tag to help me pass values and also get values from aspx.
(the numbers of param is not fix)
I've been searching days for the example how to get this done.
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Apr 19, 2011
Here is my problem: I need to store HTML in a MySQL database. Afterwards, I need to be able to retrieve the HTML and have it be valid HTML that a browser can render.
How can I store HTML in a MySQL database using .Net? How do I retrieve it afterwards? As this is the design phase, I can create the database any way that is needed.
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Dec 6, 2010
Eventually, I'm going to want/need the program I am creating to either:
A. Access the MySQL database from my website.
Or.
B. 'Load' a PHP page, and grab the contents off of it. [URL]Are these options avaiable in VB.NET ?
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Feb 20, 2011
Code:
Public Function ScreenScrapeHtml(ByVal url As String) As String
Dim objRequest As WebRequest = System.Net.HttpWebRequest.Create(url)
[code]...
If it cant reach a URL it will give me this error:
Code:
Webexception was unhandeled:
Dim sr As New StreamReader(objRequest.GetResponse().GetResponseStream())
How I can add some error-handling to this code? Like if it cant reach a URL.
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Nov 25, 2010
I have a website that divided into 4 frames. I'm trying to create an application that will constantly run on my PC as a task looking for certain text in the HTML in a frame.When it finds the text it would alert the user by presenting a pop-up message. This is basically a monitoring website that checking network nodes. Instead of staring at the screen looking for critical messages I would like to be notified when there is an alert.
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Feb 8, 2010
how i can read text or HTML from a website opened in IE?
This is the code i'm trying to use:
For Each ie As InternetExplorer In New ShellWindowsClass()
HTML = ie. ???
Next
I want to read the HTML code of the page into a string.
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Dec 13, 2009
Like in firefox or Internet Explorer where you can right click and view the html page source how can you do this in an app?I have a web browser in the form and I'm trying to view the web page in the web browser and then view the source code of that page in a box below it.
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Apr 3, 2008
How to retrieve the absolute coordinates of an HTML or CSS element from the webbrowser control using Visual Basic? I am using VB 2008 Express Edition. I would like to be able to display the control in my application and then using the HTML Document Object Model (I guess?!) get the X and Y coordinates (top, left, bottom, right) of a DIV or other HTML tag.
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Oct 20, 2010
why the code below fails to retrieve the html
Dim WebReqeust As WebClient = New WebClient
Dim URL as string = "http://www.professionalorganizervannuys.com"
Dim WebPage As String = WebReqeust.DownloadString(URL)
It fails on this particular URL.
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Jun 6, 2009
i want to make a website builder which has the html code already written so all you have to do is check which boxes you want and click next or back to go through the process of making a website with specific code implemented in it.
P.s. im using VB 2008 express edition?
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Jul 11, 2011
I am trying to extract everything between the body part as I am building a forum crawler
and since all the user posts are between the <body></body> I have chosen to experiment
with Regex. So far I have coded the following but sort of stuck on how to output the result say in a textbox? Also I am not sure if the body part of the regex is correct.
Dim URL As String = Textbox1.Text
Dim request As System.Net.HttpWebRequest = System.Net.HttpWebRequest.Create("URL")
Dim response As System.Net.HttpWebResponse = request.GetResponse
Dim streamReader As System.IO.StreamReader = New System.IO.StreamReader(response.GetResponseStream())
[Code] .....
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May 15, 2011
So, in this program I added 2 necessary login codes let's say, first a code that I will provide and then the username and password from my website. I implemented both ways, the first one worked perfectly, however, the second one is giving me some problems, my idea for that control was not using a database of users, that was going to be too complicated for a 14 year old guy, so I decided to take the source code for my website and I took a fragment, the boxes for the login, username, password, forgot your password, remember me and some other boxes, great, that worked perfectly, I uploaded the HTML modified document to my website's files and linked it to the URL of the webbrowser control in one new form, good, it's working, but I wanted a simple condition that works for this function "When the webbrowser loads the success website, hide me and show the past login form, when this one shows the failed login, popup a messagebox that says the error.". I have been looking for that simple condition for a long time. I am using Visual Basic 2010 Express Edition.
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Dec 15, 2009
I was trying to use HtmlDocument and a given url to pull in the html contents of a website to use. However there is no constructor for HtmlDocument and it's Url property is readonly. Is there any way to create an object that contains the entire DOM for a given url?
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Jun 17, 2009
What I would like to do is to find a way to get the results from a HTML/Javascript script in a string, using VB 2010.To make it clean on a practical case, I would like to get, in my VB application, the results provided by the run of the following external script:The resulting string should be something like this :
"document.write('<'+'style type='text/css'>#TCGPHiLoContainer {width: 300px;font-family: Arial;}#TCGPHiLoTable {width: 300px;margin-bottom: 3px;}.TCGPHiLoHeader {font-size: 8pt;text-align: center;}.TCGPHiLoHigh {background-color: #D9FCD1;color: Black;font-weight:
[code].....
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Dec 8, 2010
I have used .NET and ShDocVw for years to grab data off webpages without any issues I couldn't overcome. This website has me beat though. It seems like such as easy task to grab the titles and other information off a library search page, but I can't see the data to be able to grab it. Usually, I just look in the DOM, but the data wasn't there. I did a view source, but the data wasn't there.
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Jan 1, 2010
What i'm trying to do is retrieve 2-3 pieces of information from a parsed html file, then add the data into a listview in the corresponding columns i was initially going to do a function for each piece of information to retrieve but thought maybe i could do it all with 1 function instead.
[Code]...
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