C#4.0

Report
Week 3:
WINDOWS PROGRAMMING


Chapter 15 in “Beginning Visual C# 2010” ebook
Chapter 4 in “”MCTS_Self-Paced_Training_Kit”
ebook
4. GroupBoxes and Panels

Arrange components on
a GUI

GroupBoxes can display
a caption


Text property determines
its caption
Panels can have scrollbar

View additional
inside the Panel
controls
Windows Programming 1
Group
Chapter 15:Basic Windows Programming
Group
Slide 2
GroupBoxes and Panels
GroupBox
Properties
Common Properties
Controls
Text
Fig. 12.19
Description
The controls that the GroupBox contains.
Text displayed on the top portion of the
GroupBox (its caption).
GroupBox properties.
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 3
GroupBoxes and Panels
Panel
Properties
Common
Properties
AutoScroll
Description
Whether scrollbars appear when the Panel is too
small to hold its controls. Default is false.
BorderStyle Border of the Panel (default None; other options
are Fixed3D and FixedSingle).
Controls
The controls that the Panel contains.
Fig. 12.20
Panel properties.
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 4
GroupBoxes and Panels
Controls inside
panel
panel
panel
scrollbars
Fig. 12.21 Creating a Panel with scrollbars.
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 5
GroupBoxes and Panels
Chapter 15:Basic Windows Programming
The FlowLayoutPanel Control



The FlowLayoutPanel control is a subclass of
the Panel control
Unlike the Panel control, however, the
FlowLayoutPanel dynamically repositions the
controls it hosts when it is resized at either
design time or run time
Like the Panel control, the FlowLayoutPanel
control is scrollable
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 7
The FlowLayoutPanel Control
Properties
AutoScroll
Description
Whether scrollbars appear when the FlowLayoutPanel
is too small to hold its controls. Default is false.
BorderStyle Border of the Panel (default None; other options are
Fixed3D and FixedSingle).
FlowDirection Determines the direction of flow in FlowLayoutPanel.
Can be set to LeftToRight, RightToLeft, TopDown, or
BottomUp.
WrapContents Determines whether controls will automatically wrap to
the next column or row when the FlowLayoutPanel is
resized
Controls
The controls that the Panel contains.
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 8
The SplitContainer Control



The SplitContainer control creates a
subsection of the form where Splitter divides
SplitContainer into two SplitterPanel controls
that function similarly to Panel controls.
The SplitContainer.Dock property is set to Fill
by default.
SplitContainer exposes its two child
SplitterPanel controls through its Panel1 and
Panel2 properties
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 9
The SplitContainer Control
PROPERTY
DESCRIPTION
BorderStyle
Represents the visual appearance of the TabPage border. It
can be set to None, which indicates no border; FixedSingle,
which creates a single-line border; or Fixed3D, which
creates a border with a threedimensional appearance.
IsSplitterFixed
Determines whether the location of Splitter is fixed and
cannot be moved by the user
Orientation
Determines whether Splitter is oriented horizontally or
vertically in SplitContainer. It can be set to Horizontal or
Vertical.
Panel1
Exposes the properties of the SplitContainer control’s
Panel1.
Panel2
Exposes the properties of the SplitContainer control’s
Panel2
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 10
Dialog Boxes (dlg prefix)

Predefined standard dialog boxes for:





File Open and Saving
Printing and Previewing
Color selection
Font selection
Add the Common Dialog control to form

Appears in the Component Tray, pane at bottom
of Form Designer where nondisplay controls are
shown
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 11
Drag common dialog to form
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 12
Common Dialog Controls






OpenFileDialog
SaveFileDialog
FontDialog
ColorDialog
PrintDialog
PrintPreviewDialog
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 13
FontDialog
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 14
FontDialog




Property Font: Gets or sets the selected
font.
Property ShowEffects whether the dialog
box contains controls that allow the user to
specify strikethrough, underline,Color.
Property Color: Gets or sets the selected
font color
Method Showdialog():
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 15
ColorDialog
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 16
ColorDialog
Property Color : get/set color select by the user
Property FullOpen: True/false, whether the
controls used to create custom colors are visible
when the dialog box is opened
Method Showdialog():Displays a dialog box user
interface
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 17
ColorDialog
colorDialog1.FullOpen=true;
colorDialog1.Color = Color.Red;
colorDialog1.ShowDialog();
lblDisplay.ForeColor = colorDialog1.Color;
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 18
Demo
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 19
OpenFileDialog - SaveFileDialog






Property FileName: Gets or sets a string containing the
file name selected in the file dialog box.
Property Filter which determines the choices that
appear in the "Save as file type" or "Files of type" box
in the dialog box.
Property FilterIndex: Gets or sets the index of the filter
currently selected in the file dialog box.
Property InitialDirectory: Gets or sets the initial
directory displayed by the file dialog box.
Property Title: Gets or sets the file dialog box title.
Method Showdialog():
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 20
Demo
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 21
The Button, CheckBox, and
RadioButton Controls

Button



CheckBox





Text
Click (event)
Checked
CheckState
ThreeState
CheckedChanged (Event)
Radio
RadioButton


Check box
Checked
CheckedChanged (Event)
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 22
Demo
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 23
The ListBox Control

The ListBox control is the simplest of the listbased controls and serves primarily to display
a simple list of items in an easy-to-navigate
user interface from which users can select
one or more items
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 24
The ListBox and ComboBox
Control

ListBox tool



lst prefix
Simple List Box with/without scroll bars
ComboBox tool



cbo prefix
List may allow for user to add new items
List may "drop down" to display items in
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 25
The ListBox and ComboBox
Control
Dropdown
Combo Box
Simple
Combo Box
List
Boxes
Dropdown
List Box
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 26
ListBox & ComboBox
Danh sách item
Cho phép thêm item
trong màn hình thiết
kế form
27
ListBox & ComboBox

ListBox hiển thị dạng Multi Column
Hiển thị nhiều cột
28
The ListBox Control
PROPERTY
DESCRIPTION
Items
Returns the collection of items contained in this control.
MultiColumn
Indicates whether this item shows multiple columns of
items or only a single item.
SelectedIndex
Gets the index of the selected item or, if the
SelectionMode property is set to MultiSimple or
MutilExtended, returns the index to any selected item.
SelectedIndices
Returns a collection of all selected indexes.
SelectedItem
Returns the selected item
SelectedItems
Returns a collection of all selected items.
SelectionMode
Determines how many items can be selected in a list
box
GetSelected
returns true if property at given index is selecte
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 29
Common ListBox Methods
METHOD
DESCRIPTION
Items.Add()
Add the item into ListBox
Items.RemoveAt(int Index)
Removes the Item at the specified index within
the collection
Items.Remove(object
value)
Removes the specified object from the
collections
Items.Clear()
Removes all items from the collection
ClearSelected()
Clears all selections in the ListBox.
FindString()
Finds the first string in the ListBox beginning
with a string you specify
GetSelected()
Returns a value that indicates whether an item
is selected.
SetSelected()
Sets or clears the selection of an item.
ToString()
Returns the currently selected item.
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 30
The ListBox, CheckedListBox, and
ComboBox Controls
method
a. <MyListBox>.Items.Add(“MyListItem”)
lstMyListBox.Items.Add(“cat”);
b. <MyListBox>.Items.RemoveAt(Index)
lstMyListBox.Items.RemoveAt(3);
c. <MyListBox>.Items.Remove(String)
lstMyListbox.Item.Remove(“cat”);
d. <MyListBox>.Items.Clear()
lstMyListBox.Clear();
e. <MyListBox>.SetSelect(index, True/Fale)
lstMyListBox.SetSelect(3,True);
e. <MyListBox>.ClearSelect()
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 31
Demo
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 32
ComboBox Control


The ComboBox control is similar to the
ListBox control, but, in addition to allowing
the user to select items from a list, it provides
a space for a user to type an entry.
Additionally, you can configure the
ComboBox to either display a list of options
or to provide a drop-down list of options
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 33
ComboBox Control
PROPERTY
DESCRIPTION
DropDownHeight
Sets the maximum height for the drop-down box.
DropDownStyle
Determines the style of the combo box. Can be set to
Simple, which is similar to a ListBox; DropDown, which
is the default; or DropDownList, which is similar to
DropDown but does not allow the user to type a new
value.
DropDownWidth
Sets the width of the drop-down section of the
combobox.
Text
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 34
Demo
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 35
The CheckedListBox Controls



CheckedListBox displays a list of items to
users and allows them to select multiple
items by checking boxes that are displayed
next to the items.
Any number of items can be checked, but
only one item can be selected at a time.
You can retrieve a collection that represents
the checked items by accessing the
CheckedItems collection
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 36
The CheckedListBox Controls
PROPERTY
CheckedIndices
Returns a collection that represents all the checked
indexes
CheckedItems
Returns a collection that exposes all the checked
items in the control
Items
Returns the collection of items contained in this control
MultiColumn
Indicates whether this control shows multiple columns
of items or only a single item
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 37
Demo
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 38
The DomainUpDown and
NumericUpDown Controls

DomainUpDown (dud)






Items
ReadOnly
SelectedIndex
SelectedItem
Sorted
SelectedItemChanged (Event)
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 39
The DomainUpDown and
NumericUpDown Controls

NumericUpDown





(nud)
Increment
Maximum
Minimum
Value
ValueChanged Event
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 40
Demo
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 41
The MonthCalendar and
DateTimePicker Controls
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 42
MonthCalendar properties and
an event
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 43
DateTimePicker Control

The DateTimePicker control enables the user
to set a date, a time, or both in an easytounderstand graphical interface similar to a
ComboBox control
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 44
DateTimePicker properties and
an event
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 45
The Timer, TrackBar, and
ProgressBar Controls

The Timer _ tmr





Enabled
Interval
Start()
Stop()
Tick
Property
Property
Method
Method
Event
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 46
Timer
Properties
Enabled
Stop
Interval
Tick
47
Timer
Hiển thị thời gian
Enable sự
kiện Tick
Khoảng thời
gian chờ giữa
2 lần gọi Tick
48
Timer

Sự kiện Tick
Khai báo
trình xử lý sự
kiện Tick
49
Timer

Demo
Mỗi giây sự kiện Tick
phát sinh. Trình xử lý
của Tick sẽ lấy giờ hệ
thống và hiển thị lên
Label
50
The TrackBar Controls


The TrackBar control provides a simple
interface that enables the user to set a value
from a predetermined range of values by
graphically manipulating a slider with the
mouse or keyboard commands.
This enables the user to rapidly set a value
from a potentially very large range.
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 51
The TrackBar Controls
PROPERTY
DESCRIPTION
LargeChange
The number of positions the slider moves in response to
mouse clicks or the Page Up and Page Down keys.
Maximum
The maximum value for TrackBar.
Minimum
The minimum value for TrackBar.
SmallChange
The number of positions the slider moves in response to
arrow key keystrokes.
TickFrequency
The number of positions between tick marks on TrackBar.
TickStyle
Indicates where ticks appear on TrackBar.
Value
The value returned by TrackBar.
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 52
The Timer, TrackBar, and
ProgressBar Controls

ProgressBar (prg)



Maximum
Minimum
Value
Property
Property
Property
Windows Programming 1
(100)
(0)
(0)
Chapter 15:Basic Windows Programming
Slide 53
The TabControl



The TabControl control enables you to group
sets of controls in tabs, rather like files in a
filing cabinet or dividers in a notebook.
TabControl serves as a host for one or more
TabPage controls, which themselves contain
controls.
The user can switch between tab pages (and
the controls contained therein) by clicking the
tabs on TabControl
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 54
The TabControl
PROPERTY
DESCRIPTION
Appearance
Determines the visual style of TabControl
Alignment
Determines whether the tabs appear on the top, bottom,
left, or right of the tab control
Multiline
Determines whether more than one row of tabs is
allowed on the tab control
TabPages
Represents the collection of TabPage controls hosted by
TabControl
AutoScroll
Determines whether TabPage will display scroll bars
when controls are hosted outside the visible bounds of
the panel
BorderStyle
Represents the visual appearance of the TabPage
border
Text
Represents the text displayed on the tab in the tab
control that represents this TabPage
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 55
ToolTips

We demonstrated tool tipsthe helpful text that
appears when the mouse hovers over an
item in a GUI
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 56
Menus (mnu prefix)

Menus provide groups of related commands for
Windows applications
separator bars
Windows Programming 1
Checked menu
item
Chapter 15:Basic Windows Programming
Slide 57
Menu Design Standards
File Menu







New
(Ctrl N)
Open (Ctrl O)
Close
Save As
Save
(Ctrl S)
Print
(Ctrl P)
Exit
Windows Programming 1
Edit Menu






Undo
(Ctrl Z)
Cut
(Ctrl
X)
Copy
(Ctrl C)
Paste (Ctrl V)
Find
(Ctrl F)
Replace (Ctrl H)
Chapter 15:Basic Windows Programming
Slide 58
The MenuStrip Control



The MenuStrip control is essentially a ToolStrip control
optimized for the display of ToolStripMenu items.
The MenuStrip control derives from ToolStrip and can
host all the tool strip items described in the previous
lesson. Its primary function, however, is to host
ToolStripMenu items.
ToolStripMenuItem controls are the controls that
provide the visual representation for items on a menu.
They can appear as text, an image, or both and can
execute code found in their ToolStripMenuItem
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 59
The MenuStrip Control
PROPERTY
DESCRIPTION
AllowMerge
Indicates whether this menu strip can be merged with
another tool strip.
LayoutStyle
Indicates how the controls on the tool strip are laid out
ShowItemToolTips
Indicates whether tool tips for individual tool strip items
are displayed.
TextDirection
Indicates the direction of the text in controls hosted in
the tool strip.
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 60
ToolStripMenuItem properties
PROPERTY
DESCRIPTION
AutoSize
Determines whether the menu item is automatically sized
to fit the text.
Checked
Determines whether the menu item appears as selected.
CheckOnClick
Determines whether the menu item is automatically
selected when clicked
CheckState
Returns the CheckState value of the menu item.
CheckState can be Checked, Unchecked, or
Indeterminate.
DisplayStyle
Determines how the tool strip menu item is displayed.
DoubleClickEnabled
Determines whether the DoubleClick event fires.
DropDownItems
Contains a collection of tool strip items (usually, but not
necessarily, tool strip menu items) that appear in the
drop-down list when this item is chosen.
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 61
CREATING MENUS AND MENU
ITEMS

To create an access shortcut (or keyboard
shortcut),
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 62
CREATING MENUS AND MENU
ITEMS

To create an access shortcut (or keyboard
shortcut),
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 63
CREATING MENUS AND MENU
ITEMS

To add other shortcut keys (e.g., <Ctrl>-F9)
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 64
Adding Separator Bars to
Menus


You can add a separator to any submenu at
design time by choosing Separator from the
drop-down box in the menu item design
interface.
Using “-”
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 65
MenuStrip and ToolStripMenuItem an event.
Click
Generated when an item is clicked or a
shortcut key is used. This is the default event
when the menu is double clicked in the
designer
DropDownOpened Occurs when Dropdown hasoOpened
Windows Programming 1
Slide 66
Context Menus and the
ContextMenuStrip Control



All controls that can display a context menu
expose a ContextMenuStrip property that
represents the context menu associated with
that control
A context menu is invoked when the user
right-clicks a control.
You can set this property at design time in
the Properties window.
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 67
Context Menu


Demo: tạo context Menu hiển thị trong
ListBox có menu item Remove, cho phép xóa
item đang được chọn.
Tạo Form có mô tả như sau
ListBox hiển thị
các item
68
Context Menu

Kéo ContextMenuStrip thả vào Form
69
Context Menu

Kích vào ContextMenuStrip để thiết kế menu

Tạo một menu item “Remove” như hình mô tả
Soạn thảo các
menu item
70
Context Menu

Liên kết ContextMenu với ListBox

Trong cửa sổ properties của ListBox

Khai
báo
thuộc
ContextMenuStrip1
tính
ContextMenuStrip
=
Chọn context
menu
71
Context Menu

Khai báo trình xử lý sự kiện Click cho menu
item
72
Context Menu

Demo
Context Menu
hiển thị khi user
kích chuột phải
lên ListBox
73
The StatusBar Control






Alignment
AutoSize
BorderStyle
Icon
Style
ToolTipText
Property
Property
Property
Property
Property
Property
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 74
The ToolBar Control





Buttons
Property
ButtonClick Event
ImageList
Property
SendToBack()
Method
ShowToolTips
Property
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 75
CREATING MDI APPLICATIONS

Multiple Document Interface (MDI) Windows
Single Document Interface (SDI)
Windows Programming 1
Multiple Document Interface (MDI)
Chapter 15:Basic Windows Programming
Slide 76
CREATING MDI APPLICATIONS






ActiveMdiChild
IsMdiContainer
MdiChildActivate
MdiChildren
MdiParent
LayoutMdi()
Windows Programming 1
Property
Property
Event
Property
Property
Method
Chapter 15:Basic Windows Programming
Slide 77
Multiple Document Interface (MDI)
Windows
ArrangeIcons
LayoutMdi( MdiLayout.ArrangeIcons);
Windows Programming 1
Cascade
LayoutMdi( MdiLayout.Cascade);
Chapter 15:Basic Windows Programming
Slide 78
Multiple Document Interface (MDI)
Windows
TileHorizontal
LayoutMdi(MdiLayout.TileHorizontal);
Windows Programming 1
TileVertical
LayoutMdi(MdiLayout.TileVertical);
Chapter 15:Basic Windows Programming
Slide 79
Form Splash
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 80
Form Splash



FormBorderStyle
StartPosition =
TopMost
Windows Programming 1
=
None;
CenterToScreen;
=
true;
Chapter 15:Basic Windows Programming
Slide 81
Form Splash
static void Main() {
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
frmFlashForm f = new frmFlashForm();
f.ShowDialog();
if (f.DialogResult == DialogResult.OK)
{
Application.Run(new frmFormMain());
}
}
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 82
Form Splash
private
void
timer1_Tick(object
sender,
EventArgs e)
{
this.DialogResult = DialogResult.OK;
timer1.Enabled = false;
}
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 83
Form About
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 84
Mouse-Event Handling

Mouse events can be handled for any control
that
derives
from
class
System.Windows.Forms.Control



MouseEventArgs (object as arguments )
MouseEventHandler (requires an object )
Class MouseEventArgs contains information
related to the mouse event, such as the mouse
pointer's x- and y-coordinates, the mouse button
pressed (Right, Left or Middle) and the number
of times the mouse was clicked
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 85
Mouse Event
MouseEventArgs
Số lần kích chuột
Button được nhấn
Tọa độ (x,y) của
con trỏ chuột
86
Mouse events and event
arguments
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 87
Mouse Event
Sự kiện chuột với tham số kiểu EventArgs
MouseEnter
Occurs when mouse enters the visible part of control
MouseLeave
Xuất hiện khi con trỏ chuột rời khỏi biên của control
Sự kiện chuột với tham số kiểu MouseEventArgs
88
MouseDown/
MouseUp
Xuất hiện khi button được nhấn/thả và con trỏ chuột
đang ở trong vùng biên của control
MouseMove
Xuất hiện khi chuột di chuyển và con trỏ chuột ở
trong vùng biên của control
Mouse Event

MouseMove
89
Mouse Event - Mousemove

Demo
Vị trí hiện tại của
con trỏ chuột
Hiển thị tọa độ hiện
tại của con trỏ chuột
90
Mouse Event


Demo thao tác: kích chuột trái tại một điểm
A, giữ chuột trái và di chuyển chuột, chương
trình sẽ vẽ đường thẳng từ điểm A đến vị trí
hiện tại chuột.
Các sự kiện cần xử lý

MouseDown:


Xác định điểm A ban đầu
MouseMove

Kiểm tra nếu Left button của chuột đang giữ

Sử dụng Graphics để vẽ đường thẳng từ A đến vị trí hiện
tại
91
Mouse Event

Bước 1:


Tạo biến lưu trữ điểm A khi user kích chuột trái
Biến pA có kiểu Point là biến thành viên của
Form1
Lớp Form1
Biến pA lưu giữ tọa độ khi
chuột trái được click
92
Mouse Event

Bước 2

Khai báo xử lý sự kiện MouseDown trong Form1

Trong cửa sổ event của Form1, kích đúp vào sự kiện
MouseDown
Lưu lại điểm được nhấn chuột
93
Mouse Event

Bước 3

Cài đặt xử lý sự kiện MouseMove

Kiểm tra nếu LeftButton được nhấn

Vẽ đường thẳng từ pA đến vị trí hiện tại
94

demo
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 95
Keyboard - Event Handling



Key events occur when keyboard keys are
pressed and released.
Such events can be handled for any control
that
inherits
from
System.Windows.Forms.Control
There are three key events KeyPress, KeyUp
and KeyDown
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 96
Keyboard - Event Handling





The KeyPress event occurs when the user presses a key
that represents an ASCII character
The specific key can be determined with property
KeyChar of the event handler's KeyPressEventArgs
argument
The KeyPress event does not indicate whether modifier
keys (e.g., Shift, Alt and Ctrl) were pressed when a key
event occurred
If this information is important, the KeyUp or KeyDown
events can be used
The KeyEventArgs argument for each of these events
contains information about modifier keys
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 97
Keyboard events and event
arguments
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 98
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide 99
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide
Finish
Windows Programming 1
Chapter 15:Basic Windows Programming
Slide

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