rdlc barcode Adding a reference to NewButton in C#.NET

Generator GS1 - 12 in C#.NET Adding a reference to NewButton

Adding a reference to NewButton
Encode UPC-A Supplement 2 In C#.NET
Using Barcode creator for VS .NET Control to generate, create UPC-A Supplement 5 image in .NET applications.
Scan GS1 - 12 In Visual C#
Using Barcode recognizer for .NET Control to read, scan read, scan image in VS .NET applications.
MCAD/MCSD Visual C# NET Certification All-in-One Exam Guide
Generate Barcode In C#
Using Barcode maker for .NET Control to generate, create barcode image in .NET applications.
Bar Code Reader In Visual C#.NET
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET framework applications.
Figure 22-3 The NewButton reference in the Solution Explorer
UPC Code Encoder In .NET
Using Barcode creator for ASP.NET Control to generate, create UPC A image in ASP.NET applications.
Create UPC Symbol In .NET Framework
Using Barcode generator for Visual Studio .NET Control to generate, create GS1 - 12 image in VS .NET applications.
2 You will be presented with the Customize Toolbox dialog box (see Figure 22-4) Choose the NET Framework Components tab, which lists the installed components from the NET Framework library Click the Browse button and select the location of your control 3 Click OK You are now ready to build the new form When you scroll down in the Toolbox, you will see your own control listed there Notice that its name is NewButton this is why it is very important to give your control a meaningful name from the start Your control now operates like any other control Double-click on it and a default NewButton will be added to your form (see Figure 22-5) The final step in this process is to add the functionality that will set or retrieve the new property For the purposes of this demonstration, we will simply add code to the Click event of the NewButton that will produce a MessageBox displaying the property value:
UPC-A Supplement 5 Maker In Visual Basic .NET
Using Barcode encoder for .NET Control to generate, create UPC Code image in .NET applications.
Encoding UCC.EAN - 128 In Visual C#
Using Barcode printer for VS .NET Control to generate, create EAN / UCC - 14 image in .NET applications.
MessageBoxShow (newButton1ButtonName);
Code 128B Generation In C#.NET
Using Barcode printer for VS .NET Control to generate, create Code 128 Code Set C image in .NET applications.
Matrix Barcode Creator In Visual C#
Using Barcode generator for .NET framework Control to generate, create Matrix 2D Barcode image in .NET framework applications.
The following illustration shows the result of clicking on the NewButton object Notice that we set the property of the ButtonName during program design (look at Figure 22-5), and the property is retrieved through the Get in the property procedure
Encoding Barcode In C#
Using Barcode creation for .NET framework Control to generate, create barcode image in Visual Studio .NET applications.
USS Code 93 Maker In C#.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create Code 93 Full ASCII image in Visual Studio .NET applications.
22: Build Your Own Windows Control
Code 128 Creator In Visual Basic .NET
Using Barcode printer for .NET Control to generate, create Code128 image in .NET framework applications.
Bar Code Generator In .NET
Using Barcode creator for ASP.NET Control to generate, create barcode image in ASP.NET applications.
When to Extend an Existing Control
2D Barcode Encoder In Java
Using Barcode generation for Java Control to generate, create Matrix Barcode image in Java applications.
Code 128C Recognizer In Visual C#
Using Barcode reader for .NET Control to read, scan read, scan image in VS .NET applications.
It can get rather confusing to know when to extend an existing control and when to create a new control The approach just presented of extending an existing control allows PART IV
Code 128 Code Set C Creator In None
Using Barcode encoder for Excel Control to generate, create Code 128 Code Set B image in Excel applications.
Bar Code Maker In Objective-C
Using Barcode creation for iPhone Control to generate, create barcode image in iPhone applications.
Figure 22-4
Code 39 Full ASCII Encoder In Java
Using Barcode maker for Java Control to generate, create Code 39 Extended image in Java applications.
ECC200 Creator In None
Using Barcode creation for Font Control to generate, create Data Matrix 2d barcode image in Font applications.
Customizing the Toolbox
MCAD/MCSD Visual C# NET Certification All-in-One Exam Guide
Figure 22-5
The new form with a NewButton added
you to derive your control from a base control, maintaining all the properties, methods, and events of the base class It also allows you to add to the original functionality or to override it EXAM TIP Use these next two points to determine whether to extend an existing control or build a new one
If you need a control that provides much of the functionality of an existing control, it is wise to derive a new control from the existing one and simply add to it or override the base control s methods If you don t need a combination of existing controls, inherit from a single control For instance, if you need a button to do the work of a regular button, and also to take on some of your required characteristics
22: Build Your Own Windows Control
If you don t need to customize the look of the control, inheriting from an existing control is the way to go However, if you need your own look on a control, this will require more work than simply overriding the behavior of a base control In that case, you should create a new control independent of any base controls
Creating Composite Controls
Very often, you will find that you need a visual interface that is a combination of a number of controls A control built from several existing controls is called a composite control For example, you can build a simple control that will display the date and time by combining a Label control and the Timer control You can program the label to display the current date and time whenever the Timer control s Tick event is triggered This can be set to happen every second or every minute Of course, you can add these two controls to your form when you need them, so why would you go to the bother of creating a new control The answer to that lies in the number of times you will need the combination of these two controls If every form you create needs to display the date and time in this fashion, then you should create the new control PART IV
The UserControl Class
Before we go into the details of creating a new control based on existing controls, we need to examine the UserControl class Every control inherits from SystemWindowsFormsUserControl You can think of the UserControl class as similar to the SystemWindowsFormsForm class the Form acts as a container for the visual components of your application, and the UserControl acts as a container for the controls that you wish to combine into one There is an extensive list of properties, methods, and events associated with the UserControl class that provide the basic functionality of your new control: Properties such as Anchor, AutoScroll, BackColor, CanFocus, CausesValidation, DataBindings, Dock, Enabled, Font, ForeColor, Location, Size, TabIndex, TabStop, Text, and Visible, to name just a few Methods such as Dispose, DoDragDrop, Focus, Hide, Refresh, ResetText, Select, Show, and Validate Events such as BackColorChanged, ControlAdded, ControlRemoved, DragOver, Enter, GotFocus, KeyDown, KeyPress, MouseMove, Move, Resize, and TextChanged This is just a short list of the properties, methods, and events that are part of any composite control You can find the complete listing of control behavior in the help documents attached to Visual Studio NET Most of the behavior is inherited from the Control class from which UserControl is derived
Copyright © OnBarcode.com . All rights reserved.