Get HtmlElement From Stream?
Jul 26, 2010
I am trying to get html element from a stream
this is the stream:
Dim request As WebRequest = HttpWebRequest.Create("http:www.mysite.com/")
Dim response As WebResponse = request.GetResponse()
Dim stream As Stream = response.GetResponseStream()
How can I get the html elements from it? (I DO NOT WANT TO USE WEBBROWSER CONTROL)
Then I will do something like...
For Each element As HtmlElement In XXXXXXXX
ListBox1.Items.Add(element.GetAttribute("href"))
Next
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Jul 25, 2010
How can I get html elements from a stream?
This is a part of a code that get me the stream[code]....
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May 25, 2012
in an winForm app in VS2010 win 7 compiling to x86, I try to do what Alvas.Audio seems to work. See (c# ex: [URL] for reference.
Dim data() As Byte = wr.ReadData(second * i, second)
The result give me data.length()=0. I do not have any exception, I can read format from it and whatever reader I use I got this problem.EDIT : After some tests, it seems like the uncompressed file I create in the first step (in PCM format, with .wav extension) can not be recognized by the Alvas.audio library for the second step. I must miss something around Audio file markups or something alike.
Here is the code that might be the source (basically this is step 1):
Dim functOut As String = String.Empty
Dim wr As Alvas.Audio.IAudioReader = Nothing
Dim fs As IO.FileStream = Nothing
[code]....
How can I write the resulted stream to be sure I can read it again later?
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May 5, 2011
Im making a desktop player for a online web radio, and for the program I wanna make it show all the stream info. Like the stream name, and such. However I dont know how to do this? I looked everywhere
The server url is setup like this "[URL]" And it has all the stream info and that there. So is there a way I can get the info from there onto like say a label? Live updates btw.
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Nov 22, 2011
I have a problem with the cryptostream, if i write the stream to a memorystream the memory that the stream used is still alocated and i have no way of unalocating it.what am i missingdoing wrong? im using-using on the streams,readers and crypto stuffs so the framework should shut them all down right? i tryed calling .close and .dispose but nothing ,in fact i moved it all over I have provided the sub that im using for the encrytion im in .net 4.5 so there is a lil async stuff but i know thats not the problem coz i moved this code out of my main app(.net 4) for testing to see if i could fix the problem.[code...]
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Jan 23, 2012
Public Class Form1
Dim IE As New Object
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code]....
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Jul 10, 2009
I'm using a WebBrowser control in VB.Net to load a website. At that point, the WebBrowser.Document.Images property returns a collection of HtmlElement that are considered images.
What I'm trying to do at this point, is take a particular HtmlElement that represents an image and turn it into a System.Drawing.Image so that I can manipulate it. But I can't figure out how.
I did try to search for an answer, but came up with nothing. 'WebBrowser', as it turns out, seems to be a really popular keyword.
EDIT: It's been suggested that I use the SRC attribute of the HtmlElement to download the image; but the image can be dynamic - meaning the image I download can be separate from the image on the website....so, that won't work for my purposes.
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Jul 25, 2009
It seems that in previous versions of Visual Basic it was possible to convert a System.Windows.Forms.HtmlElement to the various System.Web.UI.HtmlControls but in 2008 I cannot seem to do this.What I am trying to do is convert HtmlElements that I got from a WebBrowser.Document into HtmlTableRow HtmlAnchor etc. to manipulate them but I cannot find a way to convert them in this version. I guess my questions are :1. Is it possible to convert a System.Windows.Forms.HtmlElement into one of the various ystem.Web.UI.HtmlControls ?2. If not, is there another way to cleanly manipulate tables and anchors etc. from a HtmlDocument without writing my own logic to find the tags etc
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Apr 20, 2009
Is there some way I can iterate through all available attributes for a given html element
something like:
for each lo_Attrib as attribute in htmlElement.attributes .........
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May 17, 2009
I am having some problems with Navigating to the same URL of the WebBrowser.I am trying to get an HtmlElement from the WebBrowser. This HtmlElement is a simple link ("href"). The link is shown on the site that I am navigating to, every hour for only 1 minute and than disappears.I want to check every 15 seconds if this link exists. So, I am doing a loop with a Timer and refresh the WB control.The problem that I encounter is when the WB control already navigated to the site that I wanted to check, it always navigate to the same page when refreshing. The links or the DocumentText are never changed, even if I enter Internet Explorer and see that it has been a change in the page.
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May 24, 2010
This is the button code in the html for a button on a webpage that displays more results. I tried to use the browser.invokemember but Im not getting any results back. Here is my
For Each element As HtmlElement In wb.Document.GetElementsByTagName("id")
If element.GetAttribute("id") = "more" Then
element.InvokeMember("click")
[code].....
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Apr 26, 2012
I am trying to get position of html elements in a .net's webbrowser control and failing, i need the exact position of the element relative to the whole document or the webbrowser control to be able to send a mouse click using SendMessage() P/Invoke..I have tried the solution from here but it didn't work:getting absolute position of HTML element in webbrowser control with C#.I am guessing that is because the page relies on very complex ajax and css.the function "WebBrowser1.Document.GetElementFromPoint()" works just fine in getting the accurate html element, i just need the opposite of it.other wise, should i just keep on searching using "GetElementFromPoint()" until getting the correct element?
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Aug 2, 2011
i have a form with webbrowser and browsed website with an html selectbox in website and i dont want the other <option> elements unless couple of them for easly filling the fields at every visitng
is there any control to remove unwanted html elements exist at string getting by GetElementbyid or somthing like that? so here is some of my code works fine on otherfields
[Code]...
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Dec 29, 2011
I'm trying to post to my blog programatically using VB .NET. So far, I've been using this to set the title:
WebBrowser1.Document.GetElementById("entry_title").InnerText = "title"
It works fine. However, when I try to set the body text:
WebBrowser1.Document.GetElementById("entryBody").SetAttribute("value", "body")
It won't work. It worked for me before, but now I can't get it to work again. I used the .OuterHtml command to view the line of code, and it assigned the value perfectly. However, it still won't display in the webbrowser. This is the code from the webpage I'm working with:
<textarea style="width: 95%; height: 350px;" name="entry[body]" id="entryBody">text inserted here
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Jul 17, 2009
I have this code which should change a password field into a text field in a webbrowser so that a user can see it:[code]Can anyone find a reason why this is not working, or find a better code to do it?
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Oct 10, 2011
is there a way to convert an htmlelement to a string ?
for ex Dim myhtm as HtmlElement = webbrowser1.document.getelementbyid("specificelement")
'to the Dim myhtm2 as string = myhtml
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Apr 1, 2010
I have a Web-browser Control in My Form , in Which i am showing one HTML Page .
>>That HTML Page Contains Several Anchors.
>>As per my Requirement user Can create An Anchor by providing The Appropriate data like "Id", "Href", And "Value" .
>>for providing Those Values i have an Input form.
>> Now after Providing That Data .User has to select the Position By Selecting The Previous Anchor And Next Anchor.
i am Getting All The Anchors In the Document From The Following Code
For Each Elem As HTMLElement in WebBrowserDoc.Document.GetElementsByTag("a")
CmbTag.Items.Add(Elem.innerText)
Next
Now i want to place an anchor in between user selected Anchors.
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Jul 3, 2009
I am working on a project that involves the editing of html of pages on the fly. I have put a webbrowser on the form, and I am able to retrieve the element under my mouse by using: wBrowser.Document.GetElementFromPoint(e.ClientMousePosition) in the Document.MouseClick event.However, I want the experience to be more intuitive, by placing a semi-transparent blue rectangle over whichever HtmlElement the mouse is currently hovering over. I created a borderless form with 20% opacity for this, which works great, except that I cannot for the life of me figure out how to calculate the screen coordinates of the element under my mouse. Here is what I have so far, but while the size is adjusted correctly, the location of the rectangle is just stuck at (0, 0) relative to my form. Highly annoying:
[code]...
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Oct 9, 2011
is there a way to convert an htmlelement to string
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May 31, 2011
have a form with webbrowser and browsed website with an html selectbox in website and i dont want the other <option> elements unless couple of them for easly filling the fields at every visitn
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May 24, 2009
I was just trying to create something and I found a little code on the web. When I pasted it it got 8 errors, and I could get rid of 5. The other three; I have no idea... It returns an error ('Value' is not a member of System.Windows.Forms.HtmlElement'). How should I fix this? The code is:
[Code]...
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Jan 7, 2010
I am trying to get the HTML inside a HTMLElement which has an id "block". I have tried:
If webbrowser1.document.getelementbyid("block") isnot nothing then
MsgBox(webbrowser1.document.getelementbyid("block").innerHTML)
end if
But it keep throwing a NullReferenceException and tells me to check if it null/nothing which is what I'm doing.
So how do I check if an element in a HTMLdocument with a certain ID exists?
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Jan 26, 2010
I tried several samples on the forums I can not get it to click.
For Each element As HtmlElement In WebBrowser1.Document.Links[code]...
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Dec 8, 2009
Is there any way to convert an HTML string to an HtmlElement for easy parsing? If not, what's the best way to proceed?
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Dec 27, 2011
I am trying to insert text into a text area in a webpage using the following code:
Dim webTextArea As New HTMLTextAreaElement
WebTextArea = Main.WebBrowser1.Document.GetElementById("name of web text area").DomElement
WebTextArea.value = "text to be inserted"
[code].....
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Mar 1, 2010
I am grabbing an HTMLElement from a browser object and then using getElementById to grab the element I want. When the element is grabbed into the HtmlElement object double quotes around attributes like <input type="checkbox" name="test1" /> becomes <input type=checkbox name=test1>.It is removing the double quotes and backslash from the HTML available in the HtmlElement. Is there anyway to get the HTML element from Visual Basic .NET code and keep the true HTML formatting?
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Jan 7, 2011
I need to click an image in a webbrowser from a Windows Form in VS 2010.I can click ordinary links using code such as this one:
Private Sub Button14_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button14.Click
Dim lnk As HtmlElement
For Each lnk In Form2.WebBrowser1.Document.Links
If lnk.InnerText = "the_text_of_the_link" Then
[code]....
When it comes to the second variation of the code I often get the following error message (exception):NullReferenceException was unhandled Object reference not set to an instance of an object.
Basically - how do I tell it to click on it only if there are two separate and unique strings of html code in a html tag?
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Nov 9, 2009
I have given reference to Microsoft HTML in COM (am using VB 2008)
"Unable to cast object of type 'System.Windows.Forms.HtmlElement' to type 'mshtml.IHTMLElement'."
I want to retrieve all the properties like the class name, html id of every object in the web browser. I am getting the above exception when i try to direct cast it.[code]...
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Nov 21, 2011
I'm loading blobs out of a database as a byte array and I put them in a memory stream so that I can load them into an xmldocument for parsing.However there are blobs that have multiple root nodes, this causes the parser to blow up.My solution is to just make a new root node that encompasses the whole blob. I can add onto the end just fine with a streamwriter however I can't figure out how to add onto the beginning.How can I prepend to a stream?
Update:I was having too much trouble getting this to work. The "XML" I was extracting was not proper XML and I kept on having to add more and more regexes to remove bad XML before the XmlDocument Load. I ended up using the HtmlAgilityPack to parse out my valid sections of XML and I put those inside their own xml documents.
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Jun 4, 2012
I'm writing a VB.net application (but you can answer in C# if you want, no problem) that uses a 3rd party .NET library. In particular, one method in this library takes an IO.Stream as input (among other things) and writes the results of its processing to said stream. My problem is that the method CLOSES the stream after writing to it, so I can't read back the data that it wrote in it!To be more specific: it works, of course, if the stream is a FIeStream , since it writes the data on disk, but what if I want to read the data directly to memory? I tried using a MemoryStream, but as I said, when the method returns the stream is already closed, and I can't read back anything from it.
Imports System.IO
Public Class CloseHijackedMemoryStream
Inherits MemoryStream
[code]...
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