C# Discussion Boards - CodeProject

launch file viewer from c# program

4-Dec-03 9:45

Not without extending ListView and owner-drawing several things about the list-view control (ListView is just a wrapper for the list-view common control). I'm not sure you could even do this if you did go to all that work (and it is a lot!).

If it's really necessary, you might be better off looking for a third-party .NET control that can do it. Be sure it's that important, though, since this would be inconsistent with practically all other list views in Windows. It's important to remain consistent for useability unless absolutely necessary (read the Windows UI Guidelines for more details and reasoning for this if you don't already see the inherent importance of it).

-----BEGIN GEEK CODE BLOCK-----
Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
-----END GEEK CODE BLOCK-----

elena123454-Dec-03 9:03

elena12345

4-Dec-03 9:03

Here is my problem:
The user selects a file.
Based on what the extension is, I need to get the viewer that is registered with the operating system for this file type.
And then I need to open the file with the viewer.

Do you know how to do that in C#?

Thanks a ton,

Elena

Re: launch file viewer from c# program

Heath Stewart4-Dec-03 9:40

A way to control graphic card driver?

4-Dec-03 9:40

Process.Start("path/to/file.ext");

For fine-grain control, see the ProcessStartInfo class where you can specify a different verb other than "open" (or the default, which is "open" on Win98/ME machines) or redirect the standard IO streams.

Radoslav Bielik4-Dec-03 8:29

4-Dec-03 8:29

Hi guys,

I have a short (and simple, perhaps) question but I don't know where to start or where to search for more information. Is it possible to control graphic card driver / modify its settings from a windows forms application written in C#? I'm not looking for anything universal/reusable, all I need is to know if (and how) it is possible to control drivers for nVidia cards.

[Edit]
Additional info:
What I need to do is to control the nView settings (since this is a dual head nVidia graphic card). For example to switch the card between "clone mode" (where the image on both screns is identical) and "dual mode" (where both screens display separate image - the desktop is usually extended to cover both screens).
[/Edit]

Thanks for any clues or resource links,
rado

Radoslav Bielik
http://www.neomyz.com/poll [^] - Get your own web poll

Daniel Turini4-Dec-03 8:53

Daniel Turini

4-Dec-03 8:53

I don't know what you mean by "control graphic card" , but managed DirectX may be what you look for.

Trying to make bits uncopyable is like trying to make water not wet.
-- Bruce Schneier

By the way, dog_spawn isn't a nickname - it is my name with an underscore instead of a space. -- dog_spawn

Radoslav Bielik4-Dec-03 9:19

4-Dec-03 9:19

Hi Daniel and thanks for a quick response.

Sorry for being so vague - what I need to do is to control the nView settings (since this is a dual head nVidia graphic card). For example to switch the card between "clone mode" (where the image on both screns is identical) and "dual mode" (where both screens display separate image - the desktop is usually extended to cover both screens). I'm not sure if this would be possible with DirectX Frown | :(

Thanks,
rado

Radoslav Bielik
http://www.neomyz.com/poll [^] - Get your own web poll

Heath Stewart4-Dec-03 9:37

4-Dec-03 9:37

See the SystemInformation class. The VirtualScreen property gives you the entire Rectangle that spans all monitors in a multi-monitor system. You can then calculate where your windows are supposed to be. This still requires a multi-monitor system (either with a dual-head graphics card, or multiple graphics cards), but doesn't require that you have to support a specific driver (like NVIDIA).

Radoslav Bielik4-Dec-03 9:46

4-Dec-03 9:46

Hello Heath and thanks for your response. I didn't know about the VirtualScreen property of the SystemInformation class, but I'm already using the Screen.AllScreens[i].Bounds to get the bounds of all monitors connected to the system and to properly position the windows.

What I'm trying to do is to switch the card into a mode when both screens display the same thing (clone) - I can do this manually using the display settings but I was looking for a way how to do this from a Windows Forms application (if possible at all). The reason for this is that I need to display the same content on both screens (one of them would be a projector) at certain times and instead of cloning the content programatically I thought that it would be more efficient to use the graphic driver capabilities to clone screen content.

Thanks again,
rado

Radoslav Bielik
http://www.neomyz.com/poll [^] - Get your own web poll

Heath Stewart4-Dec-03 10:18

4-Dec-03 10:18

Oh...I see, sorry.

This really warrants that you visit NVIDIA's web site and see if they have an SDK to download, or at least API documentation. This is nothing that is covered by C# or the .NET Framework (since C# is really just a language that targets the CLR, but anyway...).

You'll most likely end-up P/Invoking native calls to their drivers or some library that is installed as part of nView.

For more information on P/Invoke, see the System.Runtime.InteropServices.DllImportAttribute. This will allow you to call native methods from managed code.

Radoslav Bielik4-Dec-03 10:49

4-Dec-03 10:49

Thanks I'll try this!

rado

Radoslav Bielik
http://www.neomyz.com/poll [^] - Get your own web poll

Noah Duke4-Dec-03 9:53

Noah Duke

4-Dec-03 9:53

Radoslav Bielik wrote:
For example to switch the card between "clone mode" (where the image on both screns is identical) and "dual mode"

I don't know of a way to do it programatically, unless nVidia as an API available to do this. While DirectX can let you do some things with the card, it's not quite what you're looking for.

I had a similar situation when I upgraded my video card a few months ago. Unfortunately, I'm at work and the control panel is different, but I'll try to walk you through what may help.

Go to the Display control panel, click on the Settings tab and click the Advanced... button.

Click on the tab for nVidia (this is the part where I'm going from memory - I'm not sure exactly how it's labeled, but since you're asking this question, I assume you've poked around these settings already!)

On the navigation menu that sticks off the side (at least on the recent driver versions) one of the last options is Desktop Utilities. Click to Enable Desktop Utilities and then click the Desktop Manager Configuration button.

In the dialog box that pops up, one of the tabs is for Hotkeys. You can set one of these for various settings. I set up a hotkey to toggle Clone mode on and off.

I hope this helps. If I rambled on all this time and completely missed the point, please forgive me!;P

--Noah Duke

____________________________________________
// TODO: Insert incredibly witty sig here.

Radoslav Bielik4-Dec-03 10:02

Accessing the Image of a System.Web.UI.WebControls.HyperLink

4-Dec-03 10:02

Noah Duke wrote:
I hope this helps. If I rambled on all this time and completely missed the point, please forgive me!

Smile | :)

I am looking for a programmatic way but I highly appreciate your effort - the HotKey approach seems like a good idea. The problem is that now I have a localized Slovak version of the graphic card driver and can't find the settings I'm looking for at all! I hate localized software Confused | :confused:

thanks,
rado

Radoslav Bielik
http://www.neomyz.com/poll [^] - Get your own web poll

mkushner4-Dec-03 8:17

mkushner

4-Dec-03 8:17

Hi All,
Does anybody know a way to access the tag that is generated when the ImageUrl property of a System.Web.UI.WebControls.HyperLink is set?

I'm trying to write some onmouseover code to the image. If I could get the ID (which isn't written to the source of the page) I could call a javascript function passing it the Image ID.

I think it may have something to do with RenderChildren method.

If anyone has any suggestions, your help is greatly appreciated.

Thanks,
Mike Kushner
mike@kushners.com

Re: Accessing the Image of a System.Web.UI.WebControls.HyperLink

Heath Stewart4-Dec-03 9:31

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4-Dec-03 9:31

Extend HyperLink and add your own properties and / or events to do this, and then override Render to output your properties as HTML attribute for the IMG tag that is generated. There are several methods you can use to apply the styles and what-not for the control. It's all documented in the SDK documentation for WebControl.

Either that (easier), or output a script block (see Page.RegisterClientScriptBlock or Page.RegisterStartupScript - and you can get the Page in which the control is contained by using the control's Page property) that uses the ID to dynamically attach an event handler, although you have to then take the ClientID (as dictated by how the control is nested in one or more INamingContainer implementations, like the Page or a Panel). The first method would definitely be easier.

Roger L Jack4-Dec-03 7:00

Roger L Jack

4-Dec-03 7:00

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Re: How to capture data from the local serial port through a Aspx page situated in a Web Server ??

Colin Angus Mackay4-Dec-03 6:18

Colin Angus Mackay

4-Dec-03 6:18

I'm not sure how possible this is. It probably is doable (creating some kind of rich-client-side control), just not very wise. Certainly there will be a lot of security implications with this (i.e. Client Browsers not permitting anything dodgy to happen). Best bet might be with an ActiveX control.

Out of curiosity - Why do you want to access the serial port on a client machine via an ASPX page?

--Colin Mackay--

"In the confrontation between the stream and the rock, the stream always wins - not through strength but perseverance." (H. Jackson Brown)

Resources

Guinness4Strength4-Dec-03 4:31

4-Dec-03 4:31

I have a windows Form written in C#. I would like to "import" an Access MDB file into the project as a resource, then write this MDB file to dish at runtime. This was fairly simple in VC++ 6.0, but I'm finding little to no information about it in C#, any suggestions ?

Michael Malling

Not Active4-Dec-03 4:38

Not Active

4-Dec-03 4:38

Whats the part you having difficulty with?

Guinness4Strength4-Dec-03 4:40

4-Dec-03 4:40

I've saved the MDB as an Resource template (RCT) file now i need to write it to disk...

Not Active4-Dec-03 5:04

Not Active

4-Dec-03 5:04

These might help you out

http://www.codeproject.com/csharp/genresourcekeys.asp?target=Resource[^]

http://www.codeproject.com/dotnet/Localization.asp?target=Resource[^]

Heath Stewart4-Dec-03 6:13

4-Dec-03 6:13

Besides what Mark was saying, you can also add that MDB to your project and change the Build Action to "embedded resource". Then the file is added as an embedded resource when you compile and you can extract it easily:

Type t = this.GetType();
Stream s = t.Assembly.GetManifestResourceStream("Namespace.ResourceName.mdb");
// Save the stream to a file

Based on other things you posted, generally you still clear of resources the way you do them in VC++. Instead of string resources (or anything that can be represented as a string, hence those things with TypeConverters that can convert to/from strings) you use ResX files and a ResourceManager. Other files can be added as embedded resources. The VersionInfo block is automatically created by the linker using the assembly attributes.

You can still add/edit/remove an RC script using VS/VS.NET (opening the executable itself), but you have to delay-sign your assembly if you sign it (and you should). See my Windows XP Styles article for more information.

Not Active4-Dec-03 6:26

Not Active

4-Dec-03 6:26

Heath Stewart wrote:
GetManifestResourceStream

That's what I was trying to remember. D'Oh! | :doh:

Guinness4Strength4-Dec-03 7:11

4-Dec-03 7:11

Thanks for the replys, where do I change the Build Action ?

Guinness4Strength4-Dec-03 7:22