VS 2010 : Extract A "value" From Html Tag Or A Textbox?
Feb 27, 2011
I'm reading html tags from a webpage using Webbrowser and HtmlElementCollection class. Then I invoke specific members (link, buttons etc.) depending on their attributes.I got stuck at one point. The webpage has many similar images in one place. They can be distinguished only but a version number. I need to get this number somehow to be able to invoke the correct link/image.this is the example of the html code (it looks like that - I only removed personal imformation from it) - lets say I got it already saved in a textbox:
<TR>
<TD>My text for label</TD>
<TD>my text for description</TD>
<TD>27 February 2011 12:12</TD>
[code]....
Now - I'm after the number 197 which appears couple of times in the code.I know what is the 'My text for label', 'my text for description' and 'my username'. Also those 3 links in form of images have always the same structure, apart from the number in question - number 197.How do I extract the 197 number alone ? If I would get it, I would use it to identify the link with ID: "id=snapshot_deploy_cms-company-3" and invoke it.Basically I want to do this:If a TR tag contains 'My text for label' and also contains 'my username', then read the number 197 and... say... save the number into a textbox.
I need to extract some info of a HTML source code and put it in a textbox...i treid a lot of things and even the best idea's crasht what i got this far is :
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click WebBrowser1.Document.GetElementById("value_wood").SetAttribute(TextBox3.Text, "class") End Sub
I'm looking for an efficient means of extracting an html "fragment" from an html document. My first implementation of this used the Html Agility Pack. This appeared to be a reasonable way to attack this problem, until I started running the extraction on large html documents - performance was very poor for something so trivial (I'm guessing due to the amount of time it was taking to parse the entire document).[code]...
Essentially what I'm trying to do is read a particular line of text from an integrated web browser (webbrowser1) into a textbox. The user will enter an id number into a textbox which will automatically search the online database search that will be open in webbrowser1. What I then want to do is read the resulting html text into particular textboxes.
I am having a problem with submitting html from a textbox into a mysql table. I would believe this to be due to "special characters".
The code I am using is, vb.net Dim html = (sdata.Text.ToString) Console.WriteLine(updateRecord("INSERT INTO course (tittle, length, begining, price, about, table) VALUES ('" & TextBox1.Text.ToString & "','" & TextBox2.Text.ToString & "','" & TextBox3.Text.ToString & "','" & TextBox4.Text.ToString & "','" & TextBox5.Text.ToString & "','" & html & "')")) MsgBox("Success! You have Successfully created a new course, " & TextBox1.Text.ToString) Me.Visible = False
The error I get is: A first chance exception of type 'MySql.Data.MySqlClient.MySqlException' occurred in MySql.Data.dll
I need to extract some data from a html source [code]...
Now the problem is the words info ect.. wont always be there the content will change so can do something like getelementsbyclass or is there is a way to extract the text between
"<div class="bbcode_quote_container"></div>" and "</div>"
How would I use Regex to extract the body from a html doc,taking into account that the html and body tags might be in uppercase, lowercase or might not exist?
I am using visual basic 2005. I found on the web the following function that extracts HTML from webpages. It is very useful but unfortunately it does not work with redirected pages. That is, when I put in it a URL of a redirect page it gives me nothing or error. I added to it ".AllowAutoRedirect = True" but still it did not work. I wonder how to make it work for redirected pages.
I'm wanting to extract a table on a regular basis from an HTML web page in to a listview control. Before I start the long winded manual process (which I'm sure I can do, finding strings etc). I was wondering if there was a built-in way with VB.NET?
I want to extract the link in this code: <a class="i_link dominantcol" href="http:rapidgen.net/get/3lt4c/megakey.exe">Download</a>.Using webbrowser1. getelementbyid - how do i do it? I just want the link as dim x as string = http:rapidgen.net/...t4c/megakey.exe
I am working on my application that I am reading the strings through html page using with httprequest. All I am trying to achieve by find the value using with the matches which come next equals, something is like: "Address=Whateveritgoeshere". So I want to extract to get the strings which it would be: "Whateveritgoeshere"
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click 'Address of URL Dim URL As String = "http://mysite.com/getInfo.asp?id=" & Textbox1.Text
[code]....
However when I deug to run the application, I have got an empty returned strings. Do you know why I have got an empty returned strings?If you think that I have done something wrong then how I can only extract the strings that come next to the "Address="?
I've tried to extract the URL from an html page using regular expressions. It is really hard to understand. I have an existing application and would like to alter the code to search for a url in the form src="[URL]" the problem is that ive tried to use different expressions to no avail. could someone look at this code and advise how to alter it do what I need it to do.
I know how to extract an entire page source into VB.NET, but once I do that how do I make VB.NET search the text and return a specific vlaue that is not constant?
im parsing the data from a webpage... It basically contains a table whose source code ive pasted below.... Now i need to get the values of each cell of the table into a listbox... So basically i need to extract the numbers in the <td> tags... Now the table has approx 10 values similar to the 4 ive added below..
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] .....
I am new here and really excited to see the huge resources on this forum for vb.net. I have just started my learning of vb8 and need to create some basic applications for my personal use.I need to develop an application that can extract data from a html table and store that data into Access database. I have learned to create web browser on Visual Studio 2008. Below is the link from which I need to extract data and store into a database
I have got a problem with the regex pattern. I couldn't be able to extract the id in the images tags from the html source when I find the matches pattern that I selected on the listview items. [code] It have found the matches with the html tags, but it doesn't extract the id from the images tags. [code] Do anyone know how I can extract the id in the images tags from the html source?
I am trying to extract a url from a html page that is located specifically between the <h2 </h2> header. For example the following header is in the html page;
what i am trying to do is extract information beween two tags in some html from the source of a website. The contents of the text between the two tags will always be different. the code i currently have is;