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It all comes down to APIs. BCB might have APIs or library to help you do this while C# (actually, the .NET Framework base class library) currently does not. If you need this functionality, you need to P/Invoke the right native functions, like SQLDrivers and SQLDataSources. There also could be some .NET assemblies (the source language doesn't matter, remember, since all languages targeting the CLR compile to IL) out there. I haven't seen any, but googling might uncover something.
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hi heath,
thanks for the response...
it don't necessarily believe is has anything to do specifically with BCB's libraries/API's...
more so, my gut feel is that it has something to do with the Win32 API, as the VCL (Visual Component Library) encapsulates much of the Win32API, in the same way that the MFC handles lower level API calls...
there is nothing necessarily problematic with me building a class in C++.NET to do the same thing, but i would have preferred keeping it all in the one language...
i concur with your sentiment that at the end of the day, in .NET everything targets the CLR compile to IL (something this old man needs to start getting used to), but my problem remains, i am used to the VCL which is implemented in BCB (Borland C++ Builder) and don't know the equivalent in Microsoft World...
i tried googling before coming to the forum, i like to do my homework first before bothering anyone...  )
cheers and thanks for the suggestions though...
nik
Nik Vogiatzis
PhD Candidate: University of South Australia
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Yes, it has everything to do with APIs. Application programming interfaces are provided by libraries that contain distinct functionality. The .NET BCL does not have these where something in VCL does. This functionality does exist in the ODBC APIs and all VCL is doing is wrapping it. Again, this hasn't been done in .NET (at least in an assembly that Microsoft produces). You would have to do it and you can do it in C#. See the DllImportAttribute for more information on P/Invoke. You're not rewriting anything - just importing a native function into managed code. This is oft-done in many larger applications because of APIs that don't exist in the BCL or other third-party libraries that do exist in various Windows APIs.
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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+++
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Nik, ODBC data sources are stored within the Windows registry. Here[^] is even an article in VB.NET explaining how to read these, it should prove trivial to convert this to C#. HTH
-Nick Parker
DeveloperNotes.com
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hi nick...
greatly appreciated!!
cheers
nik
Nik Vogiatzis
PhD Candidate: University of South Australia
+++++++++++++++++++++++++++
Developing new generation Traffic Micro-simulation Tools for Traffic Engineers
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Hi,
This may be a trivial question, but I'm a newbie to GUI's and c#.
I would like to use the functionality of radiobuttons but they should look like normal buttons. More specifically I want a number of buttons where only one of them is clicked active at a time. Somehow the active button should look like it's pushed down. I could use normal radio buttons but I their layout does not fit into my application and I think normal buttons (with a Text field on them) can be presented more compactly.
Any suggestions on how to approach this in greatly appreaciated.
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Use simply labels and change their borders after click on them (create Your own inherited "RadioLabel" control). May be, You can use another control instead all "radiolabels" ... combobox etc.
Hi,
AW
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On top of what A.Wegierski said above, you could get the effect of having only one selected by adding a property, say Group that is a string or a collection object. If it's a string, and when one of these controls is clicked, enumerate the Parent.Controls property like so:
protected override OnClick(EventArgs e)
{
if (this.Parent == null) return;
foreach (Control c in this.Parent.Controls)
if (c is RadioLabel && ((RadioLabel)c).Group == this.Group)
((RadioLabel)c).Selected = c == this;
}If you used a collection object (tip, implement IComponent as well to use it easily in the designer (or create a nifty designer to do this)), the object could add itself to the collection when the collection was assigned. When clicked, you run a similar routine as above but you don't have to worry about getting the parent's Controls collection or checking the group name - your collection already has the right controls:
public GroupCollection Group
{
get { return this.group; }
set
{
if (this.group != null) this.group.Remove(this);
this.group = value;
if (this.group != null) this.group.Add(this);
}
}
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I need to know how to gain access to items in the command prompt using c#. What I want to do is send a message on XP using system32\net send blah blah. I know how to do it in c++
system("net send blah blah");
but Im not sure on C#. Any help would be greatly appreciated.
Confused and Waiting
Pumpkin Knight
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What you could do is instantiate the Cmd Window and pass in your arguments as such.
public void sendThread()
{
Process p = new Process();
p.StartInfo.CreateNoWindow=true;
p.StartInfo.FileName = "cmd";
p.StartInfo.Arguments = "net send COMPUTER Hello there.";
p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
p.Start();
p.WaitForExit();
p.Close();
}
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Hi all,
Please some response!
I have an applıcation and when it's running , Windows can not shut down!
It says nothing but goes back to desktop when I click shut down.
I really dont know why , maybe one knows.
Key features about my application:
- Uses OleDbConnection and OleDbDataAdapter for an Access2000 database.
- Has a notify icon on task bar and starts from there (not with a window form)
- Starts when Windows starts by using HKLM/..../CurrentVersion/Run
All left are ordinary and what I have experience a lot.
Any help will be appreciated.
Thanks.
Utku KAYA
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Do you have some kind of loop or strangeness in your exit condition?
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Your Problem is that you override the close function. So if Win tries to shutdown your app still wants to go to trayicon and prevents Win from Shutdown.
Use this code to fetch the Win Shutdown Command:
protected override void WndProc(ref Message m)
{
base.WndProc (ref m);
if (m.Msg == 0x11)
{
boolAlowClose = true;
this.Close();
}
}
So i think you have a bool where you set true if you want realy to leave the application (where you check the bool on app close event and set e.cancel)
Hope this helps!
Greets
Matthias
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I have written a c# service that uses a process timer to perform tasks on a regular basis.
Under certain conditions, I want this timer thread to be able to kill the service but I cannot figure out how to do it.
Can anyone help me?
Thanks in advance for your help!
Darryl Borden
Principal IT Analyst
darryl.borden@elpaso.com
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I have figured it out - I can create a servicecontroller component and issue a stop from there.
Darryl Borden
Principal IT Analyst
darryl.borden@elpaso.com
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Hello All,
If i have a tab control with several tab pages, and I drag and drop an item on the tab portion of any of these pages, is there an easy way to get that tab page object from the x y values given to me during the dragdrop event? I fired the ondragdrop event from the tab control because I was not able to get the tab portion of a tab page to fire a drag drop event.
Thanks,
Ryan
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If you mean the actual tab of the tab page using the coordinates, there's really only about one way. You can't get the tab portion directly, but you get the bounding rect for an individual tab. You could wrap it all in a simple method like so (I use Point to make the example code easier, but you can either create a Point from X and Y or pass them in and make a Point):
private TabPage GetTabPageFromPoint(Point p)
{
p = this.tabControl1.PointToClient(p);
for (int i=0; i<this.tabControl1.TabPages; i++)
{
Rectangle rect = this.tabControl1.GetTabRect(i);
if (rect.Contains(p)) return this.tabControl1.TabPages[i];
}
return null;
}
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Thanks Heath,
I had the looping mechanism, but I had completely forget to convert the coordienates from the screen to the tab control coordinates.
Thanks again,
Ryan
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Would TabControl.GetChildAtPoint work?
The graveyards are filled with indispensible men.
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No, since the tab portion of a TabPage is not a control.
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Hy, can anybody help me, or does anybody know how to make the same thing with the tray?
mfg maZe
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To do this in .NET (this is the C# forum after all), use the NotifyIcon component, which you can find in your toolbox. It's easy to use.
If it doesn't do everything you need, there are several articles here on CP that discuss / create more advanced components that use the shell API's Shell_NotifyIcon (which the NotifyIcon component does internally as well - just doesn't always expose everything you might need to use).
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I want to write a program to get the character which mouse pointer focus on.
Just like that first move the mouse pointer on some character for a while and i could get which character or word it pointed.
It is so diffucult to find proper way to do this.
I have try to use IDataObject d = Clipboard.GetDataObject(); and other thing..
But it fails. because some in some case i could find the character but others no.
Could anyone suggest me one good way suited for every control?
Example......
when i use a MS WORD application.. And put some word there like.
HELP
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mouse pointer pointed that word and i could get that word is "HELP"....
Thanks in advanced.
Kato
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Hi
I need to have a folder browser in my program - and i then added one, but i doesnt work. I then look at msdn.com where i found this pice of code
<br />
using System;<br />
using System.Drawing;<br />
using System.Windows.Forms;<br />
using System.IO;<br />
<br />
public class FolderBrowserDialogExampleForm : System.Windows.Forms.Form<br />
{<br />
private FolderBrowserDialog folderBrowserDialog1;<br />
private OpenFileDialog openFileDialog1;<br />
<br />
private RichTextBox richTextBox1;<br />
<br />
private MainMenu mainMenu1;<br />
private MenuItem fileMenuItem, openMenuItem;<br />
private MenuItem folderMenuItem, closeMenuItem;<br />
<br />
private string openFileName, folderName;<br />
<br />
private bool fileOpened = false;<br />
<br />
static void Main() <br />
{<br />
Application.Run(new FolderBrowserDialogExampleForm());<br />
}<br />
<br />
<br />
public FolderBrowserDialogExampleForm()<br />
{<br />
this.mainMenu1 = new System.Windows.Forms.MainMenu();<br />
this.fileMenuItem = new System.Windows.Forms.MenuItem();<br />
this.openMenuItem = new System.Windows.Forms.MenuItem();<br />
this.folderMenuItem = new System.Windows.Forms.MenuItem();<br />
this.closeMenuItem = new System.Windows.Forms.MenuItem();<br />
<br />
this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();<br />
this.folderBrowserDialog1 = new System.Windows.Forms.FolderBrowserDialog();<br />
this.richTextBox1 = new System.Windows.Forms.RichTextBox();<br />
<br />
this.mainMenu1.MenuItems.Add(this.fileMenuItem);<br />
this.fileMenuItem.MenuItems.AddRange(<br />
new System.Windows.Forms.MenuItem[] {this.openMenuItem,<br />
this.closeMenuItem,<br />
this.folderMenuItem});<br />
this.fileMenuItem.Text = "File";<br />
<br />
this.openMenuItem.Text = "Open...";<br />
this.openMenuItem.Click += new System.EventHandler(this.openMenuItem_Click);<br />
<br />
this.folderMenuItem.Text = "Select Directory...";<br />
this.folderMenuItem.Click += new System.EventHandler(this.folderMenuItem_Click);<br />
<br />
this.closeMenuItem.Text = "Close";<br />
this.closeMenuItem.Click += new System.EventHandler(this.closeMenuItem_Click);<br />
this.closeMenuItem.Enabled = false;<br />
<br />
this.openFileDialog1.DefaultExt = "rtf";<br />
this.openFileDialog1.Filter = "rtf files (*.rtf)|*.rtf";<br />
<br />
this.folderBrowserDialog1.Description = <br />
"Select the directory that you want to use as the default.";<br />
<br />
this.folderBrowserDialog1.ShowNewFolderButton = false;<br />
<br />
this.folderBrowserDialog1.RootFolder = Environment.SpecialFolder.Personal;<br />
<br />
this.richTextBox1.AcceptsTab = true;<br />
this.richTextBox1.Location = new System.Drawing.Point(8, 8);<br />
this.richTextBox1.Size = new System.Drawing.Size(280, 344);<br />
this.richTextBox1.Anchor = AnchorStyles.Top | AnchorStyles.Left | <br />
AnchorStyles.Bottom | AnchorStyles.Right;<br />
<br />
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);<br />
this.ClientSize = new System.Drawing.Size(296, 360);<br />
this.Controls.Add(this.richTextBox1);<br />
this.Menu = this.mainMenu1;<br />
this.Text = "RTF Document Browser";<br />
}<br />
<br />
private void openMenuItem_Click(object sender, System.EventArgs e)<br />
{<br />
if (!fileOpened) {<br />
openFileDialog1.InitialDirectory = folderBrowserDialog1.SelectedPath;<br />
openFileDialog1.FileName = null;<br />
}<br />
<br />
DialogResult result = openFileDialog1.ShowDialog();<br />
<br />
if(result == DialogResult.OK) <br />
{<br />
openFileName = openFileDialog1.FileName;<br />
try<br />
{<br />
Stream s = openFileDialog1.OpenFile();<br />
richTextBox1.LoadFile(s, RichTextBoxStreamType.RichText);<br />
s.Close(); <br />
<br />
fileOpened = true;<br />
<br />
} <br />
catch(Exception exp)<br />
{<br />
MessageBox.Show("An error occurred while attempting to load the file. The error is:" <br />
+ System.Environment.NewLine + exp.ToString() + System.Environment.NewLine);<br />
fileOpened = false;<br />
}<br />
Invalidate();<br />
<br />
closeMenuItem.Enabled = fileOpened;<br />
}<br />
<br />
else if(result == DialogResult.Cancel) <br />
{<br />
return;<br />
}<br />
}<br />
<br />
<br />
private void closeMenuItem_Click(object sender, System.EventArgs e)<br />
{<br />
richTextBox1.Text = "";<br />
fileOpened = false;<br />
<br />
closeMenuItem.Enabled = false;<br />
}<br />
<br />
<br />
private void folderMenuItem_Click(object sender, System.EventArgs e)<br />
{<br />
DialogResult result = folderBrowserDialog1.ShowDialog(); <br />
if( result == DialogResult.OK )<br />
{<br />
folderName = folderBrowserDialog1.SelectedPath; <br />
if(!fileOpened)<br />
{<br />
openFileDialog1.InitialDirectory = folderName;<br />
openFileDialog1.FileName = null;<br />
openMenuItem.PerformClick();<br />
} <br />
}<br />
}<br />
}<br />
When I copy this into my IDE, and run it - it works fine, but when i write the linies used for the FolderBrowserDialog it doesn´t work. I cant find the System.Enviroment.SpecialFolder enum. I cant find it at msdn.com - but they use it...
Can anyone help me...
thanks in advance
Søren Christensen
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Sometimes VS.NET has a problem showing nested classes, structs, and enums. The System.Environment.SpecialFolder enum is a next enum of the Environment class. Just type it and you should be fine. For information, type "SpecialFolder" in VS.NET's index. Don't forget the power of using the integrated help already on your system, since it is often hard to find things on MSDN because their search doesn't include a simple index like VS.NET's integrated MSDN help.
Also, if you need one in .NET 1.0 (FolderBrowserDialog is only available in .NET 1.1) there is an easy way. Click on "Add References", click the COM tab, and find "Microsoft Shell Controls and Automation". Then you can use simple code like this to get the default one that already exists in Windows (which provides a consistent UI in your app, too):
Shell32.Shell shell = new Shell32.ShellClass();
Shell32.Folder folder = shell.BrowseForFolder(
this.Handle.ToInt32(),
"Destination",
0x8000,
Shell32.ShellSpecialFolderConstants.ssfDRIVES);
if (folder != null) return ((Folder2)folder).Self.Path;
else return null;
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Version: 3.21
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