Re: \\computer\shared - C# Discussion Boards

Heath Stewart18-Jun-04 13:50

18-Jun-04 13:50

Can you shed some light on how you're distributing them? Are they embedded resources? Compiled into a .resources file (via a .resx source file)? Are you installing them to a location on the hard drive?

It's impossible to answer you without knowing these sorts of answers.

Microsoft MVP, Visual C#
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Re: Icons Resources Not Being Saved

Peter Vertes18-Jun-04 16:13

Peter Vertes

18-Jun-04 16:13

Sorry about that; let's see... The icons are just added to the project with the properties sidebar when I was designing the GUI for the app. This way all the icons are saved inside the .resx file. Next the entire solution was loaded up into a Visual Studio project that produces an MSI by reading the solution and compiling and packaging all the code and resources from the different projects. The the produced MSI file is deployed to the client machines and installed onto their local hard drives.

Re: Icons Resources Not Being Saved

Heath Stewart18-Jun-04 18:25

Heath Stewart

18-Jun-04 18:25

If the icons in are compiled into .resources files, then the MSI package (which I'm well aware of how it works - I've been on the beta testing team since before 1.0) has nothing to do with it. The icons are compiled into the assembly. This is also true if you add an image (or anything, really) to your project and set the build action in the PropertyGrid to "Embedded Resource". Only in this case the file is embedded - not compiled into a .resources file.

So, the next question is: what's the current culture setting for these people with problems? How are you accessing the icons (or are you just using the designer for everything)? Frankly, I've seen this problem, not even when different UI cultures are used since the ResourceManager will fallback to the neutral language resources, which are those resources in your primary assembly (the assembly with modules, which contain the IL).

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\\computer\shared

lustuyck18-Jun-04 4:18

lustuyck

18-Jun-04 4:18

Hi,

I'm developing kind of an explorer-like application, that lists local drives/folders and also network drives, as explorer does. When the user enters a path like C:\folder1\folder2, I can browse the tree to select that tree.

However, when the user enters something like \\computername, or \\computername\shared, then how should I browse the tree to select that one? I can't enumerate all domains to check where that computername can be found (takes hours), so what is the correct approch? Can I, for example, check to which domain a computername belongs, or something like that?

Kind regards,
Ludwig

Re: \\computer\shared

Heath Stewart18-Jun-04 4:40

Heath Stewart

18-Jun-04 4:40

lustuyck wrote:
Can I, for example, check to which domain a computername belongs, or something like that?

Yes, you can, but you'll need to P/Invoke NetWkstaGetInfo and declare the WKSTA_INFO_100 structure that goes with it. Lookup this function in the MSDN Library[^] for more information.

Windows Explorer does this using ITEMIDs and monikers to get those IDs. Using this information - a namespace, if you will - it can determine a path rather quickly (of course, a shell namespace provider parses the moniker). While it would be possible to use the necessary shell APIs to do this, you're looking at a huge effort to P/Invoke, interop, and declare all the necessary structs and consts to do this in C#. If you take this route, I recommend you create a mixed-mode Managed C++ assembly (i.e., contains both native instructions and IL that can be used by other managed projects). This way you don't have to worry about interop - just use the native methods, include the headers with the pre-proc defs you need, etc., etc.

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Re: \\computer\shared

lustuyck22-Jun-04 2:19

lustuyck

22-Jun-04 2:19

Okay, thanks for the answer, I got it working!
Kind regards,
Ludwig

Re: \\computer\shared

Richard Deeming18-Jun-04 7:24

Richard Deeming

18-Jun-04 7:24

Have a look at Furty's FolderTreeView[^] control.

"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

Re: \\computer\shared

lustuyck20-Jun-04 22:05

lustuyck

20-Jun-04 22:05

Thanks, but this does only support drilling to a folder, not to a UNC...

How to brows Datasets on other form in my component that droped on a form.

Member 114126618-Jun-04 4:05

Member 1141266

18-Jun-04 4:05

I write a component that have a MyDataSet and MyDataAdapter properties and when drag on a form, brows all Datasets and object on the container form.
I also have a main form that contain all datasets and datadapters and in this form,I prepar and fill my datasets. I want when i drop my component on each other forms, it MyDataSet and MyDataAdapter can see and brows DataSet and DataAdapter from MainForm.
please guide to me.
Thanks.
Hadi : hd_ali@yahoo.com

Re: How to brows Datasets on other form in my component that droped on a form.

Heath Stewart18-Jun-04 4:10

Heath Stewart

18-Jun-04 4:10

In your component, you must set the access modifiers (you can do this in the PropertyGrid) to something other than private (the default), like public or internal. This should allow you to click on them and execute custom actions defined by those class's designers.

Otherwise, you may have to implement a custom ComponentDesigner for your component and then attribute your component with the DesignerAttribute that specifies the Type of your designer you implemented.

You can read more about extending design time capabilities in the .NET Framework SDK. Read Enhancing Design-Time Support[^].

Microsoft MVP, Visual C#
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Re: How to brows Datasets on other form in my component that droped on a form.

Member 114126618-Jun-04 4:51

Member 1141266

18-Jun-04 4:51

i reply an another question by your "email". please check. thank

Closing a OleDbConnection

PaleyX18-Jun-04 3:50

PaleyX

18-Jun-04 3:50

I have a class which wraps some database operations, the following code causes errors:

internal void Close()<br />
    {<br />
        try<br />
        {<br />
            if(_dbConnection != null)<br />
            {<br />
                if(_dbConnection.State == ConnectionState.Open)<br />
                    _dbConnection.Close();<br />
                _dbConnection.Dispose();<br />
                _dbConnection = null;<br />
            }<br />
        }<br />
        catch(Exception ex)<br />
        {<br />
            MessageBox.Show(ex.StackTrace);<br />
        }<br />
    }

_dbConnection.Close() - always fails and triggers the catch block which then fails with a System.InvalidOperationException with the message " LocalDataStoreSlot storage has been freed" - what on earth is that all about?

At this rate I am thinking of going back to VC++ - it is so much easier, I never had memory handling issues in C++ yet in C# and VB.NET I spend 80% of my time on memory management and I am getting sick of it.

Rugby League: The Greatest Game Of All.

Re: Closing a OleDbConnection

Dave Kreskowiak18-Jun-04 4:05

Dave Kreskowiak

18-Jun-04 4:05

PaleyX wrote:
I never had memory handling issues in C++ yet in C# and VB.NET I spend 80% of my time on memory management and I am getting sick of it.

Odd. I spend about 2% of my time on it.

What does the rest of the code look like? How is the connection opened and passed to other objects? Are you opening a connection and keeping it open for the duration of the app? (A horrible idea I might add!) Are you calling Dispose on any objects involved?

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Closing a OleDbConnection

Heath Stewart18-Jun-04 4:06

Heath Stewart

18-Jun-04 4:06

Instead of knocking .NET, you should try reading about it before making snap decisions. For example, setting the variable to null after calling Dispose is entirely unncessary.

Also - being a C++ developer - you should know better than to assume a flagged enumeration may have only one enum value set. Instead of _dbConnection.State == ConnectionState.Open, you should use (_dbConnection.State & ConnectionState.Open) != 0) or something similar.

If you're multi-threading this code, it's possible that a command may be executing using that connection, which other ConnectionState values can tell you.

When you're done, all you need to do is call _dbConnection.Dispose(), which will close the connection and free unmanaged resources. Doing all three of those is unncessary. Why is there a Close in addition to Dispose? Because you may want to re-open the connection later, but if you dispose it, you can't - you'll get an ObjectDisposedException, since it has already been disposed.

If you read and understand the documentation for the .NET Framework, this can be a very good environment, but if you prefer VC++ that's fine, too. Just don't knock something because you did something wrong.

Microsoft MVP, Visual C#
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Re: Closing a OleDbConnection

PaleyX19-Jun-04 4:54

PaleyX

19-Jun-04 4:54

Thanks for that. Sorry about the tone of my original post, I was annpyed with myself more than with VS.NET.

The code isn't actually mine, it's something I have "inherited".

The application does keep a connection open but it's a connection to a small Access database and isn't meant to be multiuser. I imagine the original author wanted to squeeze a bit of extra performance out of it but obvioulsy he did at the expense of being correct.

Rugby League: The Greatest Game Of All.

Outlook question...

Tartampion18-Jun-04 3:13

Tartampion

18-Jun-04 3:13

Hello,

I have a simple question : is it possible in vba( in outlook ) to code something that would load the mailbox of the user that is currently logged to the computer ? This is done in a nt/2000 environment so it is easy to get the username with : Environ("UserName"). But is it possible that when outlook starts to manually code the settings so the user will have access to its mail without having to configure outlook ?

Thanks!

Phil

Re: Outlook question...

Stefan Troschuetz18-Jun-04 3:25

Stefan Troschuetz

18-Jun-04 3:25

Tartampion wrote:
is it possible in vba

This forum is for C# questions, please try somewhere else.

www.troschuetz.de

Re: Outlook question...

Dave Kreskowiak18-Jun-04 4:00

Dave Kreskowiak

18-Jun-04 4:00

1. This is a C# forum, not a VBA or Visual Basic Forum.

2. No. This is because the user that is logged in will not have the appropriate rights to the other users mailbox files stored on the C: drive.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Outlook question...

Tartampion18-Jun-04 4:16

Tartampion

18-Jun-04 4:16

Sorry about the wrong thread guys, i should have posted it in work issues or something...my mistake

1. Thanks for the wise advice

2. Thanks man i will stop searching that way and try to find another solution.

3. next post will be in the right place Big Grin | :-D

Cheers!

Phil

Can't capture arrow keys

jjansen18-Jun-04 3:01

jjansen

18-Jun-04 3:01

I have made a custom usercontrol in#, but when I press an arrow key neither the eventhandler for KeyDown, nor for KeyPress or KeyUp are called. Does anyone know how to capture array keys strokes?

Re: Can't capture arrow keys

Judah Gabriel Himango18-Jun-04 4:42

Judah Gabriel Himango

18-Jun-04 4:42

Try overridding the ProcessCmdKey method of your user control.

#include "witty_sig.h"

Re: Can't capture arrow keys

Werdna18-Jun-04 10:34

Werdna

18-Jun-04 10:34

I used to struggle with that one too.
Here is snippet of how you can do that:

		<br />
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)<br />
{<br />
	if (keyData == Keys.Up)<br />
	{<br />
   		// key up pressed<br />
		return true;<br />
	}<br />
	return false;<br />
}<br />

Reading Excel Data in C#

Member 445055118-Jun-04 2:06

Member 4450551

18-Jun-04 2:06

can Anyone educate me on the namespace I can use to read excel file data in ASP.Net(C#)

Tanx

Re: Reading Excel Data in C#

Dave Kreskowiak18-Jun-04 3:58

Dave Kreskowiak

18-Jun-04 3:58

There is no such namespace native to the BCL. You have to set a reference to the Primary Interop Assemblies for Office (XP and 2003), or the Microsoft Excel Object Library (2000 and below), to use Excel in your app.

There is an article demonstrating this here[^] on CodeProject. It's not done is ASP.NET, but it gets the point acrossed.

Warning, using Excel in a ASP server project like this will consume A LOT of resources, is not very fast, and is NOT recommended because Excel will be launched on a PER PAGE REQUEST basis. So keep your use of Excel to the absolute minimum.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Reading Excel Data in C#

Heath Stewart18-Jun-04 4:01

Heath Stewart

18-Jun-04 4:01

You have to reference the Office Excel PIA (Primary Interop Assembly). For Office XP, you can download the official PIAs from Microsoft from http://www.microsoft.com/downloads/details.aspx?FamilyId=C41BD61E-3060-4F71-A6B4-01FEBA508E52&displaylang=en[^]. For Office 2003, these are installed from the Professional CD when you choose to install the .NET Framework something-or-other (don't remember exactly what the feature was called, but it should be obvious).

For older Offices (or even to support older versions, which are backward compatible with newer versions most of the time, at least for the basic stuff like reading data), you can generate the interop assembly (RCW, or Runtime Callable Wrapper) using tlbimp.exe from the SDK - or even easier - right-click on your project, select Add Reference, select the COM tab, then find Microsoft Excel. When you add this to your references, an interop assembly is created for you.

Then you add the (typically - it may be slightly different) Microsoft.Office.Interop.Excel namespace to your C# source file and begin using.

The classes and their members are exactly the same (to use) as what's documented for VBA (Visual Basic for Applications) within Office. The documentation on MSDN[^] is very lacking, but the local help files for Office (if you installed the developer help files) are much better.

There are several articles about using Office applications in your .NET application both here on CodeProject and elsewhere on the 'net. I suggest you try using the search bar above, or use google[^] to find additional articles.

Microsoft MVP, Visual C#
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