c#: simple question: How to call a function?

[EFileTahi-A]

Hoe can i call a function? (call myPrivateSub)

 

Oh my god! In VB6 this issues were so simple! (Is there realy need to complicate?)

[PlausiblyDamp]

Just use the function name and pass in any parameters it expects i.e.

	private void button1_Click(object sender, System.EventArgs e)
	{
	int j;
	j=Test(3);
	}


	//sample function
	private int Test(int i)
	{
	return 2 * i;
	}

[EFileTahi-A]

Well, so, how can i trigger the button_click throught code?

 

vb6 example:

call button1_click

[PlausiblyDamp]

You could just call the function and pass in dummy arguments

button1_Click(this, new System.EventArgs)

[EFileTahi-A]

public void DrawRectanglesRectangle(PaintEventArgs e)

 

am trying to call the function

 

how should i call it?

 

DrawRectanglesRectangule(New PaintEventArgs) ????

[PlausiblyDamp]

It kind of depends on what the DrawRectanglesRectangule actually does. PaintEventArgs are normally passed to a forms Paint Event - it allows you to get to the graphics object and also identify what region needs repainting. Without knowing more about the code in question and what it does (or who wrote it) then it's very difficult to say what to pass in as a parameter.

[EFileTahi-A]

		public void DrawRectanglesRectangle(PaintEventArgs e)
	{
		// Create pen.
		Pen blackPen = new Pen(Color.Black, 3);
		// Create array of rectangles.
		Rectangle[] rects =
		{
			new Rectangle(  0,   0, 100, 200),
			new Rectangle(100, 200, 250,  50),
			new Rectangle(300,   0,  50, 100)
		};
		// Draw rectangles to screen.
		e.Graphics.DrawRectangles(blackPen, rects);
	}

 

here is the code

[PlausiblyDamp]

Where is this code being called from? If from the Paint event then just use

DrawRectanglesRectangle(e);

[EFileTahi-A]

i want to call it when I press a button or throught the Load_form...

[Joe Mamma]

Rectangle[] GetFormRectangles()
{
 return new Rectangle[]
	 { 
				new Rectangle( 0, 0, 100, 200),
				new Rectangle(100, 200, 250, 50),
				new Rectangle(300, 0, 50, 100)
	 };
}

private void DrawFormRectanglesOnGraphics(Graphics g)
{
 g.DrawRectangles(new Pen(Color.Black, 3), GetFormRectangles());
}

public void DrawRectanglesOnControl(Control ctrl)
{
 DrawRectanglesOnGraphics(ctrl.CreateGraphics()); 
}

private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
 DrawRectanglesOnGraphics(e.Graphics); 
}

private void button1_Click(object sender, System.EventArgs e)
{
 DrawRectanglesOnControl(this);
}

 

you could also just force the entre form to repaint

private void button1_Click(object sender, System.EventArgs e)
{
 this.Refresh();
}

[EFileTahi-A]

Thank you very much m8!

[Joe Mamma]

Here to serve.