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please,
how can i make an activex control (i need an ocx file! and not a dll) with visual studio .net and c#?
thanks! kopi_b
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AFAIK, this is not possible. You can, however, build a dll that is exposed to COM and should behave identically to ocx objects.
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Connor's Christmas Spectacular!
Judah Himango
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unfortunately i need the activex in another software that can just read ocx files and no dlls
but thanks anyway!
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This is just a shot in the dark, but have you tried renaming the dll as an OCX? I'm not familiar with the differences, but I believe a COM dll and an OCX file are similar if f not the same.
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i'll try that on monday
but i don't think it's possible
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It's not possible. The C# compiler (or any of the .NET Framework Managed languaged) cannot possibly target building an .OCX file. You also can't just rename a .NET .DLL to .OCX and expect it to work. An .OCX file is a native (processor code) image whereas all .NET assemblies are MSIL code. Even using NGen on the resulting image to convert it to native code wont work either because .NET Framework assemblies don't support exports of the type required by an .OCX file.
You'll have to go back to Visual Studio 6 (VC++ or VB) or build the control using unmanaged Visual C++.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Dave, so even if a .NET dll is exposed to COM by the runtime (thus making it a kind of ActiveX control), this still isn't possible? After doing some research, it looks like an .ocx differs very little from a standard COM/ActiveX control. Since one can build ActiveX control by exposing your type to COM, isn't it then possible to have an OCX built from managed code? My understanding is that the ComVisible attribute causes the assembly to be exposed to COM, thus allowing for things like ActiveX objects.
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Connor's Christmas Spectacular!
Judah Himango
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Judah Himango wrote: Since one can build ActiveX control by exposing your type to COM
An ActiveX control is, for all intensive purposes, an OLE object that supports, at a minimum, the IUnknown interface.
You can exposed a .NET component to COM, but that doesn't make it an ActiveX control. You're actually just registering a COM Callable Wrapper for a .NET Assembly. By default, the standard wrapper automatically generates the interfaces for IUnknown, IDispatch, and INew, among others. Any of which can be overridden with a custom implementation, or removed entirely.
If his other app that needs these controls can work with a COM-exposed .NET component, great! Obviously, his clients will still have to have the .NET Framework installed for this thing to work. So knowing that, it kind of makes it a pain to write an "ActiveX" component in .NET, drop into a web page, and expect it to work on all clients. A normal ActiveX control doesn't really need any other support for it to work.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Yep, I understood all that. So if his client can work with COM object with a .NET backend (that is, a .NET assembly exposed to COM), could he build a .NET library with an .ocx extension?
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Connor's Christmas Spectacular!
Judah Himango
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Ya know, I've never tried to rename a .NET assembly to .OCX and register the thing. Might work, might not...
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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I am new to c# and I want to know how to or anyone can suggest to me a code to prevent my textbox from accepting any assigned character or number???
Help me please!!!!!
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In .NET 2.0 there is a MaskedTextBox control that might help you. Otherwise, you can do manual prevention of character entering by overriding the TextBox's Validating event.
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Connor's Christmas Spectacular!
Judah Himango
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The following connectionString is present in App.Config
<configuration>
<appsettings>
<add key="ConnectionString" value="Data Source=machine1;Initial Catalog=database1;User Id=user1;Password=password1;">
Now I would like to retrieve it using the following code
public static string GetConnectionString
{
get
{
return ConfigurationManager.AppSettings["ConnectionString"];
}
}
Is this correct?
Thanks
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Depending on what text was left out at the top, it looks OK.
Here's an example from one of my projects:
<appSettings>
<add key="connectionstring" value="my normal sql connection string was here . . . " />
</appSettings>
And the calling code:
string configFileConnString= ConfigurationSettings.AppSettings["connectionstring"];
Cheers,
Simon
> blog:: brokenkeyboards
> what I think of the OPTIONAL keyword in VB.NET? :: here
> CV :: PDF
> skype :: SimonMStewart
-- modified at 12:14 Friday 10th February, 2006
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DataSet allow me to add a new column to the end of DataSet . But , I want to add a new column to the first (or anywhere) of DataSet . How to insert a new column in anywhere of DataSet?
Thanks a lots if you help me .
imagic
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Hello,
First of all you can not add column in a DataSet. You can do it in a DataTable. Can you explain why do you want to insert column at a specified index?
Maqsood Ahmed - MCAD.net
Kolachi Advanced Technologies
http://www.kolachi.net
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Becase those columns aren't in database . But , I want them appear in DataGrid (in specified position) .
Is DataTable allow me to insert a new column in anywhere ?
Or you want me to add column sequently ?
imagic
-- modified at 5:19 Saturday 11th February, 2006
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Hello,
You can add columns sequentially. You can use DataGridTableStyles for displaying column in whatever sequence you want.
HTH. Cheers.
Maqsood Ahmed - MCAD.net
Kolachi Advanced Technologies
http://www.kolachi.net
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Thanks a lot . I do it successfully .
imagic
imagic
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Hi there.
I'm pretty new in using C# and VS2005. I've made a little program that opens a calender in a windows form. Here's the trouble:
How can I read the mouse buttons so that I can know if the program is startet by a click (then the left button will still be pressed down when my program starts) or by key press on the keyboard? I can not get the information before the program startes, so I can not open it with this information as a parameter.
I need it to set the position to either the pointers position (when started by mouseclick) or center on the screen (when started by keyboard).
I know that a windows form contains the possibility to call a method upon mouseclick. But in this case, the left mousebutton is pressed down before the program executes and the form opens. But of course, in the beginning of the program, the left button will still be pressed down. So I think that it will be possible to detect, I just don't know how
I hope that somebody can help me, thanks in advance.
__________________
John Reinhold - DK
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This came up on Raymond Chen's blog[^], I seem to recall that it isn't very feasible to get such a thing to work. I could be wrong; you'd have to search that blog to be sure, or if someone more knowledgeable than I knows better...
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Connor's Christmas Spectacular!
Judah Himango
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Does anybody have any code that will check to see if Visaul Studio 2005 is installed on the host machine? I have written a utility that requires that is is on the machine for it to function property but I havn't be able to figure out how to check if VS 2005 is actually installed.
thanks,
-dk
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