Re: Skinning - C# Discussion Boards

Re: datagrid, datatable adding new rows

9-Jun-04 6:07

It's actually on the DataTable class, along with several other events. The DataGrid is implemented abstractly, working with any data source that implements IList or IListSource. Anything specific to how that data is manipulated would be specific to the data source. In this case, all the events you'd need for knowing when a row was inserted, changed, or deleted are defined on the DataTable class. See the class member documentation in the .NET Framework SDK for more information.

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HappyPaws9-Jun-04 8:22

HappyPaws

9-Jun-04 8:22

As far as I can see there is no event for when a row is inserted. If there is can you tell me what the event is called. anybody?

Re: datagrid, datatable adding new rows

Heath Stewart9-Jun-04 8:31

9-Jun-04 8:31

Handle DataTable.RowChanging or DataTable.RowChanged (whichever is appropriate). The DataRowChangeEventArgs.Action specifies whether a DataRow is being added, changed, committed, deleted, or rollbacked.

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Lock Excel process?

the last free name9-Jun-04 6:01

the last free name

9-Jun-04 6:01

It is possible to lock the Excel process my app creates at runtime so that if the PC user opens another Excel file it does not get opened into 'my' excel process?

Would this be an Excel thing that I can control?

Re: Lock Excel process?

Dave Kreskowiak9-Jun-04 11:48

9-Jun-04 11:48

There is no way to "lock" the Excel process.

You can't really handle the WorkbookLoad event either, because that event fires AFTER the new workbook is loaded...

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

Skinning

Simon Wren9-Jun-04 5:49

Simon Wren

9-Jun-04 5:49

I've had this crazy idea in one of my personal projects to have a go at skinning a bit like WindowBlinds (think just my app for now).

My question is how do you draw on the area outside of the ClipRectangle? I need to be able to draw where the current XP theme is usually drawn.

For example where the control box is on a form.

Anyone got any ideas on this? Smile | :)

Thanks

Re: Skinning

Heath Stewart9-Jun-04 5:58

IP address from VPN connection

9-Jun-04 5:58

You need to override WndProc in your Form derivative and handle the WM_NCPAINT (0x0085) notification message. See the documentation for the WM_NCPAINT message in the Platform SDK in the MSDN Library Online[^] for more information about the WPARAM and LPARAM values. I will tell you the WPARAM is the HRGN (handle to a region) that you can wrap in a .NET Region class using the static Region.FromHrgn method. To get a Graphics object, P/Invoke GetDCEx to get the HDC (handle to a device context) for the HRGN. You can then use Graphics.FromHdc to get a Graphics object. Just be sure to call Graphics.ReleaseHdc then Graphics.Dispose when you're done drawing otherwise you'll have a memory leak.

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Re: Skinning

Simon Wren9-Jun-04 6:03

Simon Wren

9-Jun-04 6:03

Thanks i'll give that a shot Smile | :)

Re: Skinning

Wackatronic10-Jun-04 5:19

Wackatronic

10-Jun-04 5:19

I am working on this same issue. I use a standard form with no title bar or controls. I then put placeholder images for the standard items like titlebar, control box, form control buttons. I then read in from a skin file what images to use for what items and where the position needs to be. This way I can even use a background image that is non-rectangular with regions to create a nicely skinned application.

Yes, I program in VB, but only to feed my addiction to a warm place to sleep and food to eat!

Visit my Code Project blog (Mobile Audio project)[^]

Judah Gabriel Himango9-Jun-04 5:20

Judah Gabriel Himango

9-Jun-04 5:20

I would like to retrieve the IP address assigned to my machine from a VPN connection. Obviously I can go Dns.GetHostByName(Dns.GetHostName()).AddressList to get the list of addresses assigned to my local machine, and this does indeed return both my LAN address and my VPN address, however, is it possible to distiguish in code which address is my VPN address and which one is my LAN address?

#include "witty_sig.h"

Re: IP address from VPN connection [EDITED]

Dave Kreskowiak9-Jun-04 9:02

Re: IP address from VPN connection [EDITED]

9-Jun-04 9:02

You'll either have to use:

1) The Win32 API IPHelper functions to iterate through the network adapters and get the addresses for each of them

or

2) Use the System.Management classes (WMI) to iterate through the adapters, looking for the VPN adapter. The class to find in the WMI query will be Win32_NetworkAdapter.

There is no ".NET Way" to do this...

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

Judah Gabriel Himango9-Jun-04 9:50

Judah Gabriel Himango

9-Jun-04 9:50

Shucks. Thanks for the information.

#include "witty_sig.h"

Loop through many textboxes

mkennedy779-Jun-04 4:57

mkennedy77

9-Jun-04 4:57

I have a form that contains 200 textboxes in a table format, all named the same except with a number appended (i.e tbName1-tbName200). If I want to process these textboxes in a loop to capture the text values, how should I do this? Do I look for all of the components in the form and examine each component to see if it matches the name I'm looking for; seems to me that this is a difficult way to find the actual textbox object.

--Mike

Guinness4Strength9-Jun-04 5:14

Guinness4Strength

9-Jun-04 5:14

You could add a Panel or GroupBox behind the TextBoxes, then just iterate through the control in the Panel or GroupBox.
The following is just an shove in the right direction, I believe this approach will work.

private void CycleTextBoxes()
{
     foreach( Control ctrl in gbTextBoxGroupBox.Controls)
     {
          TextBox tbTemp = (TextBox)ctrl;
          if(tbTemp!=null)
          {
               //do stuff here.....
          }
      }
}

Heath Stewart9-Jun-04 5:48

9-Jun-04 5:48

You will get an exception. Instead, use TextBox tbTemp = ctrl as TextBox; The as keyword performs a safe cast, returning null if the cast isn't valid instead of throwing an InvalidCastException. If that cast wasn't valid, only then when tbTemp be null.

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Guinness4Strength9-Jun-04 5:23

Guinness4Strength

9-Jun-04 5:23

The following is code for manipulating INI files:

using System.IO;
using System.Runtime.InteropServices;
using System.Text;
...
...
...
public class INI
{
	public INI(string Path)
	{
		INIPath = Path;	
	}
	public string INIPath=null;
	[DllImport("kernel32")]
	private static extern long WritePrivateProfileString(string section,string key,string val,string filePath);
	[DllImport("kernel32")]
	private static extern int GetPrivateProfileString(string section,string key,string def,StringBuilder retVal,int size,string filePath);
	[DllImport("kernel32")]
	private static extern int WritePrivateProfileSection(string section,string Entries,string filePath);

	public void ClearSection(string SectionName)
	{
		WritePrivateProfileSection(SectionName,"",this.INIPath);
	}
	public void WriteINI(string Section,string Key,string Value)
	{
		WritePrivateProfileString(Section,Key,Value,this.INIPath);
	}	
	public string GetINI(string Section,string Key,string DefaultValue)
	{
		StringBuilder temp = new StringBuilder(255);
		int i = GetPrivateProfileString(Section,Key,"",temp,255,this.INIPath);
		if(i==0 && DefaultValue!="NOADD")
		{
			WriteINI(Section,Key,DefaultValue);
			return DefaultValue;
		}
		if(i==0 && DefaultValue=="NOADD")
			return "NOADD";
		return temp.ToString();
	}
}

Alex Getman9-Jun-04 6:53

Alex Getman

9-Jun-04 6:53

Try to use this function

private void avoidTextboxes()
{
FieldInfo[] fields = this.GetType().GetFields(BindingFlags.Instance | BindingFlags.NonPublic);

TextBox _btn;
foreach (FieldInfo fi in fields){
if (null != (_btn = fi.GetValue(this) as TextBox))
{
_btn.Text += " was modified";
}
}

}

xedom developers team

dotNet MDI app and win32 child forms

mkennedy779-Jun-04 11:23

mkennedy77

9-Jun-04 11:23

Thanks to you all for your time and suggestions, I'll try some of them out. Since I'm processing an input form of 21 columns x 25 rows, for each textbox name, if I loop through all of controls to find the textbox's text value, I'll potentially be doing this hundreds of times for each one.

So what I may use is a HashTable to store the TextBox's name and the TextBox Object so I can look for the key and then if it's there, just get the TextBox object and it's associated Text value. Any thoughts on this?

--Mike

southperthman9-Jun-04 3:52

southperthman

9-Jun-04 3:52

Hi Everyone,

Is it possible to create a dotNet MDI app (C#) and use pinvoke to
create win32 client forms? This would mean using the CreateWindowEx
function and possibly sending over the dotNet parent Handle. If you
can do this, what steps should I take and watch out for? For example,
do I need to send over the HINSTANCE of the app and/or do I need to
set the MdiParent to the win32 child. Lots of questions here. Any
help would be totally awesome!

Cheers guys,

DrD.

Dave Kreskowiak9-Jun-04 8:54

9-Jun-04 8:54

Why on earth would you want to? The Form class is a wrapper for the Win32 Window class to begin with, so your already using the Win32 "Form" class.

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

southperthman9-Jun-04 14:58

southperthman

9-Jun-04 14:58

Basically I have an existing program that pumps out OpenGL graphics to a win32 window. This window is created using CreateWindowEx. I now want to put a dotNet front to it and make it a client window of dotNet MDI. It sounds simple enough but I'm not sure how to set this up properly. Any ideas?

Dave Kreskowiak10-Jun-04 4:21

10-Jun-04 4:21

I've never even thought of attempting something like this. Can you get the OpenGL library to draw it's contents on a device context that you specify?

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