Environment Variables

Visual Studio 2003, C#

Recently I need to get user's data location.
I found out that I can get it using Environment.GetEnvironmentVariable("UserProfile").
So I'm curious, what else are in the Environment namespace. A nice article written by Naveen K Kohei can be found here http://www.codeproject.com/dotnet/netdiagnostics4.asp
in addition, I also list all variables on my machine. And here is the result :

Variable Name : SystemDrive
Variable Name : USERPROFILE
Variable Name : MSDevDir
Variable Name : INCLUDE
Variable Name : Path
Variable Name : LOGONSERVER
Variable Name : VS71COMNTOOLS
Variable Name : PROCESSOR_ARCHITECTURE
Variable Name : CVS
Variable Name : ProgramFiles
Variable Name : NUMBER_OF_PROCESSORS
Variable Name : CommonProgramFiles
Variable Name : TMP
Variable Name : APPDATA
Variable Name : ComSpec
Variable Name : FP_NO_HOST_CHECK
Variable Name : HOMEDRIVE
Variable Name : COMPUTERNAME
Variable Name : PROCESSOR_LEVEL
Variable Name : OS
Variable Name : PROCESSOR_IDENTIFIER
Variable Name : USERDNSDOMAIN
Variable Name : windir
Variable Name : USERDOMAIN
Variable Name : ALLUSERSPROFILE
Variable Name : USERNAME
Variable Name : PATHEXT
Variable Name : CLIENTNAME
Variable Name : HOMEPATH
Variable Name : SystemRoot
Variable Name : TEMP
Variable Name : LIB
Variable Name : PROCESSOR_REVISION
Variable Name : SESSIONNAME
Variable Name : Cor_Debugging_Control_424242

Create Rounded corner Form in C#.Net

From various source on the net

protected override void OnPaint(PaintEventArgs e)
{
//base.OnPaint (e);
GraphicsPath p = new GraphicsPath();
p.StartFigure();
p.AddArc(new Rectangle(0, 0, 40, 40), 180, 90);
p.AddLine(40, 0, this.Width - 40, 0);
p.AddArc(new Rectangle(this.Width - 40, 0, 40, 40), -90, 90);
p.AddLine(this.Width, 40, this.Width , this.Height - 40);
p.AddArc(new Rectangle(this.Width - 40, this.Height - 40, 40, 40), 0, 90);
p.AddLine(this.Width - 40, this.Height, 40, this.Height);
p.AddArc(new Rectangle(0, this.Height - 40 , 40, 40), 90, 90);
p.CloseFigure();
this.Region = new Region(p);

SolidBrush oBlackBrush = new SolidBrush(System.Drawing.Color.Black);
System.Drawing.Pen borderPen = new System.Drawing.Pen(oBlackBrush, 4);
e.Graphics.DrawPath(borderPen, p);
borderPen.Dispose();

p.Dispose();
}

Interface vs abstract class

Something I found on the net

http://www.dotnetjohn.com/articles.aspx?articleid=94

Interface vs abstract class

When should you use an abstract class, when an interface, when both? This table will help you decide.

Interfaces vs Abstract Classes
Feature	Interface	Abstract class
Multiple inheritance	A class may implement several interfaces.	A class may extend only one abstract class.
Default implementation	An interface cannot provide any code at all, much less default code.	An abstract class can provide complete code, default code, and/or just stubs that have to be overridden.
Constants	Static final constants only, can use them without qualification in classes that implement the interface. On the other paw, these unqualified names pollute the namespace. You can use them and it is not obvious where they are coming from since the qualification is optional.	Both instance and static constants are possible. Both static and instance intialiser code are also possible to compute the constants.
Third party convenience	An interface implementation may be added to any existing third party class.	A third party class must be rewritten to extend only from the abstract class.
Is-a vs able or can-do	Interfaces are often used to describe the peripheral abilities of a class, not its central identity, e.g. an Automobile class might implement the Recyclable interface, which could apply to many otherwise totally unrelated objects.	An abstract class defines the core identity of its descendants. If you defined a Dog abstract class then Damamation descendants are Dogs, they are not merely dogable. Implemented interfaces enumerate the general things a class can do, not the things a class is.
Plug-in	You can write a new replacement module for an interface that contains not one stick of code in common with the existing implementations. When you implement the interface, you start from scratch without any default implementation. You have to obtain your tools from other classes; nothing comes with the interface other than a few constants. This gives you freedom to implement a radically different internal design.	You must use the abstract class as-is for the code base, with all its attendant baggage, good or bad. The abstract class author has imposed structure on you. Depending on the cleverness of the author of the abstract class, this may be good or bad. Another issue that's important is what I call "heterogeneous vs. homogeneous." If implementors/subclasses are homogeneous, tend towards an abstract base class. If they are heterogeneous, use an interface. (Now all I have to do is come up with a good definition of hetero/homo-geneous in this context.) If the various objects are all of-a-kind, and share a common state and behavior, then tend towards a common base class. If all they share is a set of method signatures, then tend towards an interface.
Homogeneity	If all the various implementations share is the method signatures, then an interface works best.	If the various implementations are all of a kind and share a common status and behavior, usually an abstract class works best.
Maintenance	valign="top"If your client code talks only in terms of an interface, you can easily change the concrete implementation behind it, using a factory method.	Just like an interface, if your client code talks only in terms of an abstract class, you can easily change the concrete implementation behind it, using a factory method.
Speed	Slow, requires extra indirection to find the corresponding method in the actual class. Modern JVMs are discovering ways to reduce this speed penalty.	Fast
Terseness	The constant declarations in an interface are all presumed public static final, so you may leave that part out. You can't call any methods to compute the initial values of your constants. You need not declare individual methods of an interface abstract. They are all presumed so.	You can put shared code into an abstract class, where you cannot into an interface. If interfaces want to share code, you will have to write other bubblegum to arrange that. You may use methods to compute the initial values of your constants and variables, both instance and static. You must declare all the individual methods of an abstract class abstract.
Adding functionality	If you add a new method to an interface, you must track down all implementations of that interface in the universe and provide them with a concrete implementation of that method.	If you add a new method to an abstract class, you have the option of providing a default implementation of it. Then all existing code will continue to work without change.

Work Related

C#.Net 2003 windows programming

//Get mouse position in client coordinates
Point p = picBoxDrawingArea.PointToClient(Control.MousePosition);

//Get Mouse Position on screen
Control.MousePosition;

Work Related

C#.Net 2003 windows programming

//Get mouse position in client coordinates
Point p = picBoxDrawingArea.PointToClient(Control.MousePosition);

//Get Mouse Position on screen
Control.MousePosition;

Work Related

Doing Custom DataGridTextBoxColumn in C#.Net

This Column, has a Centered Header, but contains right aligned numeric data. Also the background Colour is changed according to cell value.

private StringFormat m_strFormat = null;

public UCCustomColumn()
{
// This call is required by the Windows.Forms Form Designer.
InitializeComponent();
// TODO: Add any initialization after the InitializeComponent call
m_strFormat = new StringFormat();
m_strFormat.Alignment = StringAlignment.Far;
m_strFormat.Trimming = StringTrimming.None;
}

protected override void Paint(Graphics g, Rectangle bounds, CurrencyManager source, int rowNum, Brush backBrush, Brush foreBrush, bool alignToRight)
{

SolidBrush BackgroundBrush;
// Get value on current cell
double dValue = (double) this.GetColumnValueAtRow(source, rowNum);
string strValue = dValue.ToString(this.Format);
double dATValue,dUVValue;
if (rowNum ==0)
{
dATValue = (double)this.GetColumnValueAtRow(source, rowNum);
dUVValue = (double)this.GetColumnValueAtRow(source, rowNum+1);
}
else
{
dATValue = (double) this.GetColumnValueAtRow(source, rowNum-1);
dUVValue = (double)this.GetColumnValueAtRow(source, rowNum);
}

SolidBrush StrongBrush = new SolidBrush(Color.FromArgb(51,102,255));
SolidBrush MediumBrush = new SolidBrush(Color.FromArgb(153,204,255));
SolidBrush SoftBrush = new SolidBrush(Color.White);


if((dATValue >25.7) && (dUVValue >=3))
BackgroundBrush = StrongBrush;
else if((dATValue <=25.7) && (dUVValue >=3))
BackgroundBrush = MediumBrush;
else if((dATValue <=25.7) && (dUVValue <3))
BackgroundBrush = SoftBrush;
else
BackgroundBrush = SoftBrush;

g.FillRectangle(BackgroundBrush, bounds);
RectangleF CellBounds = new System.Drawing.RectangleF(bounds.Left, bounds.Top, bounds.Width, bounds.Height);
g.DrawString(strValue, this.DataGridTableStyle.DataGrid.Font, foreBrush, CellBounds, m_strFormat);
}

Work Related

Dependency walker Visual studio 6
a great way to look all public methods in a DLL

Work Related

Dependency Walker visual studio 6
is a good tools to view all public methods in a DLL

Work related

How to open PDF file programmatically in windows c#.Net

Solution 1
Use Process.Start()
Solution 2
host the web browser control in the C# application and
load this .pdf file into the browser control.

Note:
I haven't tried solution 2