VS 2010 : Click Image / Webbrowser / HtmlElement Class / Multiple Identical Images?
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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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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Jul 20, 2011
Imports System.IO
Public Class Form3
Const IMAGE_DIRECTORY As String = "C:images"
Dim files As String() = Directory.GetFiles(IMAGE_DIRECTORY)
Dim max_length, i As Integer
Dim s, fname As String
[Code]...
I simply want to have a list of all graphics saved in specified folder displayed as miniatures - this suppose to be a sort of an image browser - it does not have to be done using ListView, so I'm open to any suggestions.
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Jul 30, 2011
I expected the code below to have the following behaviour:
1) Login in to website
2) Perform the following 10 times
A) Navigate to website homepage
B) Search webpage for images (There are always images)
If image with alt text "spaghetti" exists then click it and return to homepage (Step 2A)
[Code]...
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Jul 18, 2009
i'm making an app which uses a webbrowser control to show some offline (not cache) html pages like a slide show. let's say pages in a folder on the desktop etc when it came to testing the whole thing, i figured out that the images in the html are not visible on the webbrowser control. instead there is a space where the image should be, corresponding the actual image dimensions.and when i right click on this empty space where images should be, and click on properties, i see the image size given as -1 byte (minus 1 byte) and there is no image type.
however given any online url's to the same webbrowser control or opening the same html pages with the real internet explorer i got no problem and see the images.i've been googling for almost 10 hours for a solution without success, so any hints are welcome. used vb 2008, .net framework 3.5, ie 7.
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Nov 16, 2010
is it possible to search and retrieve identical photos in a database using VB.NET platform
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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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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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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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May 29, 2011
Alright, im making a basic program. But now ive run into a problem. I want the program to go to a site and than click on a button in the site. Ive done this with this:
WebBrowser1.document.GetElementById("bert").InvokeMember("click")
And it works, but it just pops up an internet explorer, i want it to go to the site from the button in the program itself, i dont want it to be a popup.
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Jul 2, 2011
I have made an app that resizes images however in windows if you right click and slect properties on the image file there is a details tab and it has lots of data, time created, what model of camera, exposure settings ..... ect. How can i read this in my application? This does not bring in the items in the details list. The image is a tiff file
[Code]...
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Aug 4, 2010
I'm building a project with VS 2010, a part of this is an automated tax submit through webbrowser control.Although i manage to make it work with 12 different pages i have a problem with one particular page that must be scripted or something (don't know much about web development).
[Code]...
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Nov 11, 2009
I would like to click an image in a web browser and have had no luck coding so far could any one help? url...i would like to click the "go" button on this page after i have filled in the boxes.
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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 15, 2012
clicking this button
Quote:
<a href="" class="btn-slide" onclick="show_panel(); return false;"><img src="login.jpg" alt=""></a>
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Jan 17, 2011
<input type="image" src="website.com/sign-in-secure._V192194766_.gif" width="201" align="absmiddle" alt="sign in using our secure server" value="Continue" height="22" border="0">
[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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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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Aug 13, 2010
Is it possible to search for images ONLY in WebBrowser? For example, my keyword in textbox1 is 'clouds' and when the button is clicked WebBrowser must show only images of that keyword.
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Oct 5, 2010
Is it possible to scan the pixels in webbrowser for an image that was loaded into my resources and then click on it? What I want to do:Have a reference image in resources Scan webbrowser1's PIXELS to see if it appears on the current page,Then if it does, Click somewhere in the region of the image.I do NOT want to search for a .jpg .png .gif .bmp etc. in the webbrowser.
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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 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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Jan 24, 2012
I wish to insert a row into an SQL table a multiple number of times. The only field that will change is the Primary key ID which will update automatically.
To enter the INSERT into a loop seems very inefficient (time). The only other way I can find to do this is build up an array of values and do a multiple INSERT but again this seems very inefficient (memory) when the values will all be identical.
Is there a way of saying insert this row a variable number of times?
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Jun 9, 2011
How can i display more then on image in a datagridview column? I already have the column as an image column.I am just having trouble showing more than one image. And searching has come up with nothing besides how to display one image.
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Oct 17, 2010
[code] I dont really understand what the error-msg means. I've used this bit of code in many of my projects but this time I get this error: [code]
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Oct 19, 2010
I added a table to my program and it generated two errors and not it will not build. I have added quite a few tables and this has never happened before. The reeors are:
1. public sub new ' has multiple definitions with identical signatures
2. 'Protected Overrides Sub OnCreateMainForm()' has multiple definitions with identical signatures.
I have deleted the table that I added and tried undoing everything having to do with it but nothing works.
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Aug 8, 2009
I have been trying to use Subsonic 3 in a test application in order to understand how it works. However, when it builds the vb files from the database the files are full of '' has multiple definitions with identical signatures errors. I am using Visual Studio 2008 configured for VB.
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Mar 4, 2010
i dont know what has happened to my project. it suddenly wont build and comes up with some errors regarding identical signatures. to the best of my knowledge i didnt do anything to it. i was testing some drawing stuff, but it now no longer builds on any of my back up copies either.the error list show errors at line 25 "public sub new() has multiple defs...." and line 34 "Protected overrides sub oncreatemainform() has multiple defs.
Code:
'------------------------------------------------------------------------------
' <auto-generated>
[code].....
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