Visual Inheritance and user Defined Controls

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Programming III

Visual Inheritance

and User-Defined

Controls


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Visual Inheritance and UserControls

Upon completion of this work, the learner shall as a

means of designing and building a user-defined

control The student shall be capable of creating .NET

components with Visual Studio .NET using a Class

ibrar! pro"ect, and using the # files in C$

applications

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Visual Inheritance(1/12)

Visual inheritance enables !ou to achie%e

%isual consistenc!.

&or e'ample, !ou could define a base Form that contains a product(s logo and a specific

background color.

)ou then could use the baseForm

throughoutan app for uniformit! and branding.

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Class VisualInheritanceBaseForm *&ig. +.

deri%es from &orm.

/e use the public classVisualInheritanceBaseForm

. Use the namespace declaration that was created for us b!

the 0#E.

1ight click the pro"ect name in the Solution !"lorer and

select Pro"erties, then choose the #""lication tab.

0n the $ut"ut t!pe drop-down list, change %indo&s

#""lication to Class 'irar.

2uilding the pro"ect produces the *dll.

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Visual Inheritance(+/12)


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Visual Inheritance(,/12)

To %isuall! inherit from

VisualInheritanceBaseForm, create a new

/indows Forms app. 0n this app, add a reference to the .dll !ou

"ust created.

3odif! the line that defines the class4public partial class VisualInheritanceTestForm :

VisualInheritanceBase.VisualInheritanceBaseForm

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Visual Inheritance(./12)

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Visual Inheritance(/12)

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User-Defined Controls

The .NET &ramework allows !ou to create

custom controls.

Custom controls appear in the user(sToolbox.

There are multiple wa!s to create a custom

control, depending on the le%el ofcustomi7ation that !ou want *&ig. +.8.

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Im"lement a User-Defined Control

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imer Control

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Timers are non-%isual components that generate Tick e%ents ata set inter%al.

The Timer(s Interal propert! defines the number of

milliseconds between e%ents. Create a UserControl class for the pro"ect b! selecting Pro4ect

5 #dd User Control 6.

/e name the file *and the class ClockUserControl.

9dd a Label and a Timer to the UserControl.

Set the Timer inter%al to 1000 milliseconds.

clockTimer must be enabled b! setting Enabled to true

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&igure +.: shows the output of Clock,

which contains our ClockUserControl.

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Consume the User Defined Control(1/.)

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2,

7ight clic8

$n 9eneral


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Consume the User Defined Control(+/.)

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Consume the User Defined Control(,/.)

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Consume the User Defined Control(/.)

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Consume the User Defined Control(./.)

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Create a %indo&s :orm oolo! Control(1/.)

The /indows &orms Toolbo' Control template

creates a user defined control and pro%ides all

of the functionalit! that is re;uired to add thecontrol to the oolo!.

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Create a %indo&s :orm oolo! Control(+/.)

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Create a %indo&s :orm oolo! Control(/.)


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Create a %indo&s :orm oolo! Control(./.)

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7eferences

.NET #ocumentation

Te'tbook, Chap +

https4==msdn.microsoft.com=en-us=librar!=mt5>?6>5.asp

' https4==

msdn.microsoft.com=en-us=librar!=ms@??>+?.asp

' https4==msdn.microsoft.com=en-

=lib = 6+@6@3
https://msdn.microsoft.com/en-us/library/mt683786.aspxhttps://msdn.microsoft.com/en-us/library/mt683786.aspxhttps://msdn.microsoft.com/en-us/library/mt683786.aspxhttps://msdn.microsoft.com/en-us/library/ms233813.aspxhttps://msdn.microsoft.com/en-us/library/ms233813.aspxhttps://msdn.microsoft.com/en-us/library/ms233813.aspxhttps://msdn.microsoft.com/en-us/library/ms233813.aspxhttps://msdn.microsoft.com/en-us/library/ms233813.aspxhttps://msdn.microsoft.com/en-us/library/ms233813.aspxhttps://msdn.microsoft.com/en-us/library/ms233813.aspxhttps://msdn.microsoft.com/en-us/library/mt683786.aspxhttps://msdn.microsoft.com/en-us/library/mt683786.aspxhttps://msdn.microsoft.com/en-us/library/mt683786.aspxhttps://msdn.microsoft.com/en-us/library/mt683786.aspx

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Visual Inheritance and user Defined Controls