Building a Base Form Class in .NET framework

Paint QR Code 2d barcode in .NET framework Building a Base Form Class
Building a Base Form Class
Drawing QR-Code In Visual Studio .NET
Using Barcode encoder for .NET framework Control to generate, create Denso QR Bar Code image in VS .NET applications.
Private Sub PTBaseWin_Load(ByVal sender As Object, _ ByVal e As SystemEventArgs) Handles MeLoad AddEventHandlers(Me) End Sub
Quick Response Code Recognizer In .NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
4 BUILDING THE USER INTERFACE LAYER
Barcode Generator In .NET Framework
Using Barcode generation for .NET framework Control to generate, create barcode image in .NET framework applications.
Here Me refers to the currently running instance, which is the instance of the derived form that inherits from this base form class
Barcode Scanner In .NET Framework
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
NOTE: When the runtime loads a derived form class, it also loads the base form class automatically You don t have to call the base form class to load it Add any code to the Load event for the base form class that needs to execute when every derived form is loaded
Creating QR Code In C#.NET
Using Barcode maker for VS .NET Control to generate, create QR-Code image in .NET framework applications.
If other events need consistent processing throughout your application, you can add event handlers for these events in the base form class Once you have your base form class in place, and your forms inherit from it, you have an application that has a very consistent feel As the application changes over time and forms are added to the project, any new form inherits the same feel with very little work You may nd that you need more than one set of standard form behaviors For example, you may have one set of standard processing for your primary maintenance forms and another set of standard processing for your modal dialogs Or you may have one set of processing for editable forms and one set for read-only forms To achieve this requirement, you can de ne multiple base form classes
QR-Code Creation In Visual Studio .NET
Using Barcode creation for ASP.NET Control to generate, create QR-Code image in ASP.NET applications.
NOTE: NET does not support multiple inheritance Any class can inherit from only one base class So, in this example, any one form can inherit from only one base form class But different forms can inherit from different base form classes
Printing QR Code JIS X 0510 In VB.NET
Using Barcode creation for Visual Studio .NET Control to generate, create QR Code 2d barcode image in VS .NET applications.
PTBaseWin class has code that is used by all forms A PTEditBaseWin class inherits from PTBaseWin and adds functionality to support editable forms A PTReadOnlyBaseWin class also inherits from PTBaseWin
Painting Barcode In .NET
Using Barcode maker for Visual Studio .NET Control to generate, create bar code image in .NET applications.
You can de ne a hierarchy of base form classes For example, a
Universal Product Code Version A Creation In .NET
Using Barcode creator for .NET framework Control to generate, create UPC-A image in Visual Studio .NET applications.
but provides functionality to support read-only forms Any form in your application can then inherit directly from PTBaseWin or from one of the derived forms: PTEditBaseWin or PTReadOnlyBaseWin
Encoding EAN13 In VS .NET
Using Barcode generator for .NET framework Control to generate, create EAN13 image in Visual Studio .NET applications.
4
Drawing Barcode In VS .NET
Using Barcode maker for .NET Control to generate, create barcode image in .NET framework applications.
Building the User Interface Layer
ANSI/AIM Code 93 Printer In .NET
Using Barcode generation for Visual Studio .NET Control to generate, create USD-3 image in Visual Studio .NET applications.
Building Along
Code39 Decoder In .NET Framework
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
For the Purchase Tracker sample application: Add a form project item to the Windows Application project (PTWin) using the Windows Form template If you created your own form template using steps from the preceding chapter, you can use your form template here Name the form PTBaseWin If not already added by the selected template, add the standard set of regions to the form as described earlier in this chapter Cut the ProcessEnter and ProcessLeave methods from the ProductWin form and paste them into the PTBaseWin form Paste them into the Private Methods region Cut the AddEventHandlers method from the ProductWin form and paste it into the PTBaseWin form Paste it into the Private Methods region Cut the line of code from the Load event of the ProductWin form that called the AddEventHandlers method and paste it into the Load event of the PTBaseWin form You now have an operational base form class that ensures the controls on all derived forms consistently process the Enter and Leave events But at this point, the base form class does not actually do anything To make use of the base form class, you need to inherit from it, as described in the next section
Barcode Reader In Visual Studio .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.
Inheriting from the Base Form Class
Decode GS1 - 13 In Visual Studio .NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
People may say that you have your father s eyes or your mother s nose or your grandfather s temper You inherit many common attributes and behaviors from the hierarchy that is your family tree In software development, inheritance basically means the same thing The parent (base class) has particular attributes and behaviors Any child from that parent (derived class) inherits all the parent s attributes and behaviors
Code 128A Creator In C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create Code-128 image in .NET applications.
NOTE: Unlike your family tree, however, the NET Framework supports only single inheritance, meaning that each child can have only one parent But it does support a hierarchy so that the child can have a parent, grandparent, greatgrandparent, and so on Each generation inherits every attribute and behavior of every prior generation
Encoding Bar Code In VB.NET
Using Barcode generation for .NET Control to generate, create bar code image in Visual Studio .NET applications.
Bar Code Generator In Visual Studio .NET
Using Barcode creator for ASP.NET Control to generate, create bar code image in ASP.NET applications.
Bar Code Generation In Visual C#
Using Barcode generation for VS .NET Control to generate, create bar code image in .NET applications.