Month: June 2005

DomainUpDown and NumericUpDown Controls DomaiUpDown The windows Forms System.Windows.DomainUpDown control looks like a combination of a text box and a pair of buttons for moving up or down through a list. This control displays and sets a text string from a list of choices. You can select the string by clicking up and down buttons to navigate through a list. Alternatively you can press the UP and DOWN Arrow keys or just type a string that matches an item in the list. You can use this control to select items… Read More

.NET Common Windows Forms Controls In this tutorial we will learn about Common Windows Forms Controls in Visual Basic .NET 2005. IN this part 1 of this article, We will be learning the controls like Control Hierarchy, Label, LinkLabel, TextBox, RichTextBox, PictureBox, GroupBox, Panel, Button, CheckBox , RadioButton, ListBox, CheckedListBox and ComboBox.Control Hierarchy The base class for all Windows controls is located in the System.Windows.Forms namespace. These controls are built into the .NET framework and form the basis for derived controls. These controls have a distinct hierarchy of their own. For… Read More

Dialog Boxes in Visual Basic .NET Most Windows applications request for user input. Dialog boxes are one means of requesting users for specific kinds of inputs. Therefore, VB.NET allows its designers to create a number of different types of dialog boxes. Standard Dialog boxes are included in classes that fall within the purview of the CommonDialog. FileDialog ColorDialog FontDialog PageSetupDialot PrintDialog Let us now briefly study the features of the CommonDialog boxes OpenFileDialogClass This class provides users with the file selection capability. The properties and methods of this dialog boxes… Read More

Common Controls and Handling Control Events In this tutorial we will be learning how to use common control like Control Hierarchy, Label and LinkLabel, TextBox and RichTextBox, PictureBox, GroupBox and Panel, Button, CheckBox and RadioButton, ListBox, CheckedListBox and ComboBox, DomainUpDown and NumericUpDown, MonthCalendar and DateTimePicker, TreeView and ListView, Timer, TrackBar and ProgressBar, HScrollBar, VScrollBar, TabControl and Handling Control Events. All controls are governed by the Control Class “System.Windows.Forms” Namespace. This class handles the entire basic window handle (HWND) functionality such as the creation and destruction of windows handles. When Control… Read More

Visual Studio Adding Controls In this tutorial let’s discuss about Adding Controls to a Windows Form, Adding Controls using Windows Forms Designer, Adding Controls Dynamically and Setting properties of Controls. Sample source codes used in this tutorial are included. Forms are containers for control objects. All controls have properties, methods and events that can be used to customize their functionality. Controls can be manipulated in the designer mode and code can be added to dynamically add controls at run time. Adding Controls to a Windows Form Controls are basically groups… Read More

Building graphical interface elements by using the System.Drawing namespace In this tutorial we will learn about Graphics Object, The Windows Forms Coordinate System, Drawing Text on a Form, Drawing Shapes and Working with images.     Understanding The Graphics Object Graphics handling in Visual Basic .NET is based on GDI+ (Graphics Device Interface). A graphics device interface allows you to display graphics on a screen or a printer without having to handle the details of a specific display device. All that you need to do is to make calls to… Read More

Introduction to Event Handling One of the most useful capabilities of the OOP Languages is their inbuilt ability to be aware of a large number of events like MouseOver, MouseClick, and so on so that we can write codes to react to any event that we are interested. This is made possible by the rich set of classes that have been built in the .NET Framework The events handling is very simple as we have seen in the previous example where buttonClicked event is handled by the following code: Private… Read More

Setting and Adding Properties to a Windows Form In this tutorial we wil leran about Setting and Adding Properties to a Windows Form, Using the Visual Designer to set Windows Form Properties, Setting Windows Forms Properties programatically and Using Visual Inheritance along with the sample project and screen shots. Using the Visual Designer to set Windows Form Properties The properties of the Widows properties can be edited in the properties window visually. Both the inherited properties and also those added in the current class can be edited using the property… Read More

Using Application Class Visual Basic 2005 introduces a speedy way to access many important classes relating to the Computer on which the application is running, the user running it, the application itself, its forms and any associated web services. The best part of it all is that you can access it all using the new My object. The new My object has added features that help the programmer to gain access to some functionality that was really hard to achieve. My.Application Object contains information about running application, such as the… Read More

VB.NET 2005 Free Training Exploring the Forms Designer generated code As you create a new project in the Visual Basic, the IDE generally automatically adds lots of lines of code on its own. Visual Basic 2005 comes with an option to skip over this behavior of the Visual Basic IDE. The default option comes with this behavior enabled. These codes are introduced with an aim that the user can continue to use the form without bothering about write codes to instantiate the form with a function new() and also the… Read More

Using The System.Windows.Forms.Form class System.Windows .Forms.Form class is the foundation class for all forms to be created. All the forms that are created in VB .NET are also inheriting from this base class. This class provides for all the facilities needed for the form. Additional functionality can be added by separate codes. In the .NET Framework, a number of new features have been added to the Form Class and the Controls. We shall see some of the new features quickly. For most detailed information is available in the Microsoft website.… Read More

Visual Studio.NET Namespaces The .NET Framework class library has thousands of classes which are needed for developing and deploying solutions. In order to organize all those classes for ease of use .NET Framework uses namespaces. This Gives the Classes their own space and prevents conflicts between the various names in these classes. For instance if two classes contain a method Paint(), then to avoid conflicts in names we can place these classes in two different namespaces. Thus namespaces allow classes to be grouped in a consistent, hierarchical manner. The writing… Read More

Introduction and Implementing Inheritance The usefulness of inheritance is depnding on the choice of its usage. You can use inheritance if the derived class is a kind of base class but not has a relationship with the base class. Such a situation empowers you to reuse the code from the base class. It is also more useful if the hierarchy is very shallow. The developer can effect global changed to the derived class by changing the base class. Understanding Inheritance Inheritance is an important feature of any OOP Language. Let… Read More

Implementing Class Library Object in VB.NET 2005 Class: Classical Object Oriented Concepts explain a class as a cookie cutter. A class allows you to create objects of the class. As a programmer you define a class with data fields, properties, methods and events. Then you can create objects based on that class that have state (fields, properties) and behavior (methods, events). A class can be considered as a specification of how the object of the class should look like and behave. An object of the class is nothing other than… Read More

Introducing VB.NET 2005 Windows Forms We will be learning in the next series of articles as part of VB.NET 2005 Free Training : Introducing Windows Forms in the following topics with code samples and screen shots. Introducing Windows Forms Designing Windows Application is simpler and less time consuming with Visual Basic 2005. A number of new facilities and enhancements have been made to assist the developer complete the project in time and with lesser number of errors. Windows Form is the cynosure of the Windows Application. Visual studio 2005 packs… Read More