473,608 Members | 1,821 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Getting a reference to an "object" from the WebBrowser Control?

Hiya,

I'm using mshtml and the web browser control to embed an OLE object in my
..NET application.

What I want to do is get a reference to the "object" embedded therein:

The HTML looks something like this:

<html>
<body>
<object classid="clsid: 260AACA0-F963-101B-8955-0000C0DCD465"
id="TgControl" width="100%" height="100%" border="1" ></object>
</body>
</html>

I am loading the above HTML with the Browser.Navigat e2 command and all is
well. Now, I can fetch the Document Object Model of the web page using:

Dim myDoc As HTMLDocument = New HTMLDocumentCla ss
myDoc = CType(Browser.D ocument, HTMLDocument)

But how can I get a reference to the actual embedded item "TgControl" from
the object model?

Any hints greatly appreciated.

Robin
Nov 20 '05 #1
7 6920
Hi Robin,

When I was you I would start with it in VB.net with Option Strict of.

A sample to get the first href (This is all with early binding)
Watch typos or other errors I copied it from a class however not complete so
someparts can be very good wrong.

It is just to give you the idea.

I hope this helps?

Cor

myDoc = CType(Browser.D ocument, mshtml.IHTMLDoc ument2)
For i as integer = 0 To MyDoc.all.lengt h - 1
Dim hElm as mshtml.IHTMLEle ment= DirectCast(MyDo c.all.item(i),
mshtml.IHTMLEle ment)
If (hElm.tagName = "a") Then
If Not DirectCast(hElm , mshtml.IHTMLAnc horElement).hre f Is Nothing
Then
hrefname = DirectCast(hElm ,
mshtml.IHTMLAnc horElement).hre f.ToString
'do Something
End if
End If
next

I'm using mshtml and the web browser control to embed an OLE object in my
.NET application.

What I want to do is get a reference to the "object" embedded therein:

The HTML looks something like this:

<html>
<body>
<object classid="clsid: 260AACA0-F963-101B-8955-0000C0DCD465"
id="TgControl" width="100%" height="100%" border="1" ></object>
</body>
</html>

I am loading the above HTML with the Browser.Navigat e2 command and all is
well. Now, I can fetch the Document Object Model of the web page using:

Dim myDoc As HTMLDocument = New HTMLDocumentCla ss
myDoc = CType(Browser.D ocument, HTMLDocument)

But how can I get a reference to the actual embedded item "TgControl" from
the object model?

Any hints greatly appreciated.

Robin

Nov 20 '05 #2
Ok, I can see what you are doing here Cor, but the problem is I have an
object embedded of the class 260AACA0-F963-101B-8955-0000C0DCD465 - what I
want to do is get an IntPtr (or something) to this data blob so that I can
manipulate it while it is embedded in the web browser control.

By looking at the properties of "myDoc" with the debugger, I can see that
the HTML I have shown below results in the "Applet" collection having a
single item in it. I'm guessing this is something to do with my TgControl
object. Now what I want is to get access to this object so I can manipulate
it.

Does this make sense?

Thanks.

"Cor Ligthert" <no**********@p lanet.nl> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..
Hi Robin,

When I was you I would start with it in VB.net with Option Strict of.

A sample to get the first href (This is all with early binding)
Watch typos or other errors I copied it from a class however not complete so someparts can be very good wrong.

It is just to give you the idea.

I hope this helps?

Cor

myDoc = CType(Browser.D ocument, mshtml.IHTMLDoc ument2)
For i as integer = 0 To MyDoc.all.lengt h - 1
Dim hElm as mshtml.IHTMLEle ment= DirectCast(MyDo c.all.item(i),
mshtml.IHTMLEle ment)
If (hElm.tagName = "a") Then
If Not DirectCast(hElm , mshtml.IHTMLAnc horElement).hre f Is Nothing
Then
hrefname = DirectCast(hElm ,
mshtml.IHTMLAnc horElement).hre f.ToString
'do Something
End if
End If
next

I'm using mshtml and the web browser control to embed an OLE object in my .NET application.

What I want to do is get a reference to the "object" embedded therein:

The HTML looks something like this:

<html>
<body>
<object classid="clsid: 260AACA0-F963-101B-8955-0000C0DCD465"
id="TgControl" width="100%" height="100%" border="1" ></object>
</body>
</html>

I am loading the above HTML with the Browser.Navigat e2 command and all is well. Now, I can fetch the Document Object Model of the web page using:

Dim myDoc As HTMLDocument = New HTMLDocumentCla ss
myDoc = CType(Browser.D ocument, HTMLDocument)

But how can I get a reference to the actual embedded item "TgControl" from the object model?

Any hints greatly appreciated.

Robin


Nov 20 '05 #3
Elp

"Robin Tucker" <id************ *************@r eallyidont.com> wrote in
message news:ca******** ***********@new s.demon.co.uk.. .
Hiya,

I'm using mshtml and the web browser control to embed an OLE object in my
.NET application.

What I want to do is get a reference to the "object" embedded therein:


No idea regarding your question but wouldn't it be easier to locate the .dll
or .ocx file containing this object and adding it directly on your form
instead of passing through the Web Browser control? Not all IE embeddable
objects can be ambedded in a Window Form but i've done that succesfully with
quite a few of them.
Nov 20 '05 #4
Hi Robin,

Nice idea, however I would first try with that sample I gave you try to get
the information.
Probably is the equivalent from IHTMLAnchorElem ent for the object
IHTMLObjectElem ent.
I was currious and I typed it in in MSDN, and there it was :)

http://msdn.microsoft.com/library/de...ement/type.asp

Every element has something like that conform the DOM. From than I would do
that other step to get to the real applet object in mem, however from that I
donnot know how, although it sounds very interesting.

Cor
Nov 20 '05 #5
Cor and Robin,

If you can get the IHTMLObjectElem ent interface, then you can use the
object property to get the actual object (and cast it to whatever you wish).

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Cor Ligthert" <no**********@p lanet.nl> wrote in message
news:eJ******** ******@TK2MSFTN GP10.phx.gbl...
Hi Robin,

Nice idea, however I would first try with that sample I gave you try to get the information.
Probably is the equivalent from IHTMLAnchorElem ent for the object
IHTMLObjectElem ent.
I was currious and I typed it in in MSDN, and there it was :)

http://msdn.microsoft.com/library/de...ement/type.asp
Every element has something like that conform the DOM. From than I would do that other step to get to the real applet object in mem, however from that I donnot know how, although it sounds very interesting.

Cor

Nov 20 '05 #6
Cheers guys - I didn't see the object property. Actually, the
HTMLObjectEleme nt class in mshtml does not have the object property,
although the IHTMLObjectElem ent interface does. This is what threw me!

Now its all working well. Thanks.

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> wrote in
message news:%2******** *******@TK2MSFT NGP11.phx.gbl.. .
Cor and Robin,

If you can get the IHTMLObjectElem ent interface, then you can use the
object property to get the actual object (and cast it to whatever you wish).
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Cor Ligthert" <no**********@p lanet.nl> wrote in message
news:eJ******** ******@TK2MSFTN GP10.phx.gbl...
Hi Robin,

Nice idea, however I would first try with that sample I gave you try to get
the information.
Probably is the equivalent from IHTMLAnchorElem ent for the object
IHTMLObjectElem ent.
I was currious and I typed it in in MSDN, and there it was :)

http://msdn.microsoft.com/library/de...ement/type.asp

Every element has something like that conform the DOM. From than I would

do
that other step to get to the real applet object in mem, however from

that I
donnot know how, although it sounds very interesting.

Cor


Nov 20 '05 #7
oh please don't go there. That couldn't be done so we decided to create an
ActiveX control by adding the required interfaces to our OLE component. Hey
presto - shaggage! WinForms doesn't seem to like it very much, particularly
the out-of-processness of it. We get deadlock. So, as a last resort (well
not actually, a last resort would be scrapping the current OLE control and
totally re-writing the suite, which would take about 2 years) we are
embedding into a browser. If that doesn't work, embedding into Microsoft
Word within a browser, etc.
"Elp" <ro********@REM OVEME.hotmail.c om> wrote in message
news:eW******** ******@tk2msftn gp13.phx.gbl...

"Robin Tucker" <id************ *************@r eallyidont.com> wrote in
message news:ca******** ***********@new s.demon.co.uk.. .
Hiya,

I'm using mshtml and the web browser control to embed an OLE object in my .NET application.

What I want to do is get a reference to the "object" embedded therein:
No idea regarding your question but wouldn't it be easier to locate the

..dll or .ocx file containing this object and adding it directly on your form
instead of passing through the Web Browser control? Not all IE embeddable
objects can be ambedded in a Window Form but i've done that succesfully with quite a few of them.

Nov 20 '05 #8

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

7
20346
by: Pablo J Royo | last post by:
Hello: i have a function that reads a file as an argument and returns a reference to an object that contains some information obtained from the file: FData &ReadFile(string FilePath); But , for example, when the file doesnt exists, i should not return any reference to a bad constructed object, so i need something as a NULL reference object. I suppose i could return a pointer instead, but i have some code written with references which...
3
494
by: Kam | last post by:
Hi! When I am trying to drag user controls or any controls from the Toolbox to a form in some of my projects I get a dialog messages: (Microsoft Deployment Environment) "Object reference not set to an instance of an object" Notes that: 1. It's a designer problem, not a reference problem. When I am adding this user control directly to the code it works just fine, but I can't make it
4
5023
by: Tim Johnson | last post by:
Hello All: I would like to expand upon the typeof operator. Using 'typeof' I can distinguish between string and array for instance, because typeof returns "object" for array. How can I programmatically distinguish between an Array and an Option, for instance? Thanks
2
11354
by: samlee | last post by:
// create an object Control obj=new Control(); // How to write c# code to achieve the following pseudo code? // use an integer to represent an obj int temp=(int)obj; // later recover original object Control obj1=(Control)temp; TIA
5
2821
by: Robin Tucker | last post by:
Hiya, I'm using mshtml and the web browser control to embed an OLE object in my ..NET application. What I want to do is get a reference to the "object" embedded therein: The HTML looks something like this: <html>
1
2818
by: Chris Magoun | last post by:
I suddenly received an unexpected error in my project. I have been working on this project for some time without this issue. Nothing has changed in the form that caused the exception. A little experimentation shows that I cannot run ANY .NET web project without getting this error: ---------------------------------------------------------------------------- ---- Object reference not set to an instance of an object.
35
3196
by: Chris | last post by:
Hi, I tried to create a class which must change the propety 'visible' of a <linktag in the masterpage into 'false' when the user is logged. But i get the error: "Object reference not set to an instance of an object" for the line 'If mpg.FindControl("lkred").Visible = True Then'. I couldn't find sofar the solution. Any help would be appreciated ... Thanks
0
2643
by: Tamer Ibrahim | last post by:
Hi, Sometimes, I got the following error message when I use ajax calendar control on some aspx pages : Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an...
4
2160
by: My Pet Programmer | last post by:
Ok guys, I'm really looking for someone to tell me how bad a hack this is, and if I'm close to where I should be with it. The basic situation is that I have a class which creates a basic calendar control, the only difference is I stole the navigation scheme from Vista (e.g., if you click on the year you zoom out to the months list, then out to the decade, and back in when you click a year, then a month). I ran into some trouble...
3
2323
by: Sarah | last post by:
Hi - Please be gentle. I am quite new to visual basic, but I have been going through tutorials and reading up. I found a code snippet on the internet that I wanted to see if I could re-purpose for a project, but I keep getting the error: "Object reference not set to an instance of an object" for the 7th line of the code below which is: obj.ConvertPage(URL).Save("C:\screencaptest2.bmp", System.Drawing.Imaging.ImageFormat.Bmp)
0
8071
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
8013
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
8503
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
6831
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
6017
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
5489
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
4039
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
2482
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
0
1345
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.