OPI_LR2011_ch2m2

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` Windows Forms -

: KeyUp, KeyPress, KeyDown, PreviewKeyDown.

' KeyUp [ . ' KeyPress [ B

[F KeyDown ( (-

, i [ B . 0 KeyPress ( F

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A [ [F KeyDown , -

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Keyboardapp. +:

–Text – «1 + B»;

–KeyPreview – True.

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A Text [ . A KeyPreview

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KeyPreview + False, + (

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KeyPreview true. ` + TextBox.

TextBox:

–Text — «»;

–ReadOnly — True;

–TabStop — False.

9 , . 2.1.

@ 2.1 – ' + Keyboardapp

` F KeyDown. ` -

+ ( B

KeyDown +.

F KeyDown Form1_Keydown. ` -

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private void Form1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) {

//@M<N5OA@ 3@+7 textbox1.Text = “”;

//3747-,4ROA@ M< 95C<69.C5 ?+5-,B5 Ctrl

//R?N@ C5?, C7 T53<6.OA@ . 3@+7 6+@-@ Ctrl if(7.Control) {

textbox1.Text <= "Ctrl+";

}

//3747-,4ROA@ M< 95C<69.C5 ?+5-,B5 Shift

//R?N@ C5?, C7 T53<6.OA@ . 3@+7 6+@-@ Shift

13

if (7.Shift){ textBox1.Text +="Shift+";

}

//3747-,4ROA@ M< 95C<69.C5 ?+5-,B5 Alt

//R?N@ C5?, C7 T53<6.OA@ . 3@+7 6+@-@ Alt If (e.Alt){

textBox1.Text += "Alt+";

}

//?@3,:OA@ KeyData 95C<69.C@W ?+5-,B,

Keys key = e.KeyData;

//-<CRY5OA@ T 859<D 34@ 95C<69.C. ?+5-,B.

//?@8< 6<6C7A9<D ?9@3@?, C5?<D R?

//Ctrl, Shift, Alt

key &= ~keys.Control; key &= ~keys.Shift; key &= ~keys.Alt;

// -<-@8<A@ @C4<A597 6+@-@63@+.M799R textBox1.Text += key.ToString();

2.2.3 ( Keyeventargs

: KeyEventArgs F + F - B. A, F -

:

Alt – true, i B Alt;

Control – True, i B Ctrl;

Shift – True, i B Shift;

KeyCode – B;

KeyData – B;

KeyValue – KeyData;

H ndl d – , i [, -

. , Handled false. { i -

B , Handled

true.

` + F B

[ Alt, Ctrl Shift. { i

B , Textbox [ .

` i + F -

B, KeyData -

+ F. > [ 0 F B

KeyData.

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1 key & = ~keys.Control [

key F B Ctrl ( , [ . >-

F B Alt Shift.

ToString [ ( B. :

B [ F; B

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B. = ( + -

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2.2.4 #$. " 8

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2.2.5$. Timer

@ Windows Forms

( . A F[ ,

B i

F F.

: Timer [ F . / Timer [:

–Interval – [ -

;

–Enabled — [ A F/A ;

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Timer, Interval

Elapsed.

2.2.6 $. – DataTimePicker

… DataTimePicker [ F

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( . 2.3) [ F -

.

@ 2.3 – … DataTimePicker

: DataTimePicker [ F

+ ( . „ [ (

+ (.

/ DataTimePicker :

–Format – [ +

( ;

–ShowUpDown – F[

(. { i False – ( [ ComboBox, i [ , i True – ( [ NumericUpDown, i F[ (;

–CustomFormat – , i [ + - ( ;

–MaxDate – ( ;

–MinDate – ( ;

–Value – .

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2.2.7 DateTime

3 DateTime -

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–dd – . { i [ [ - + – 0;

–dddd – (;

–MM – (1–12);

–– ;

–yyyy – ;

–hh – (1–12);

–HH – (1–24);

–mm – ;

–ss – .

: , + ( - -

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. 2.1.

17

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2.3.5A .

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2.4 $" ,)"

2.4.1> .

2.4.2.

2.4.3: .

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2.5 (9 " , % /

2.5.1= .

2.5.2‡ KeyEventArgs?

2.5.3{ + F F B?

2.5.4` F ToString?

2.5.5= Timer.

2.5.6= DateTimePicker.

2.5.7` DateTime?

2.5.8` TimeSpan?

2.5.9A ( + «2002-21-11 GMT+2 14:48:12.87»?

2.5.10{ ?

19

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3.1 . %

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3.2.1 (%) " GDI+

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( . ' Drawing - ( '[, B F + F. 3-

.NET + F Microsoft GDI+

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+ + + (bmp, jpeg, gif, wmf, ico, tiff) -

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3.2.3 (;) / (")V.$

A SolutionExplorer + Form2. „ + - [ [ B . 3 Form2

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( F MouseDown. A F MouseMove MouseUp.

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private void Form2_MouseDown (object sender, System.windows.Forms.MouseEventArgs e)

{

Form1 arentorm = (Form1)MdiParent; switch(parentorm.currentTool){ case Tools.LINE:

//Drawline (new Point (e.G, e.Y)); break;

case Tools.ELLIPSE:

//Drawellipse (new Point (e.x, e.Y)); break;

Case Tools.TEXT :

//Drawtext(new Point(e.X, e.Y)) ; break;

case Tools._`N:

//-6C59@-+:OA@ 3453@4 8+R 3@M5C?. A5+:-599R @+,-a7A drawPen = true;

break;

}

//T535A'RC@-.OA@ 374B. ?453?. 8+R A5+:-599R

PreviousPoint.X = e.X; PreviousPoint.Y = e.Y;

}