create barcode image in vb.net De ne a set of mutually exclusive radio buttons. Populate a combo box or a list box by using C# code in .NET framework

Creating PDF 417 in .NET framework De ne a set of mutually exclusive radio buttons. Populate a combo box or a list box by using C# code

De ne a set of mutually exclusive radio buttons. Populate a combo box or a list box by using C# code
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Add a panel control, such as StackPanel, to the form. Add the radio buttons to the panel. All radio buttons in the same panel are mutually exclusive. Use the Add method of the Items property. For example:
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towerNames.Items.Add( Upper Gumtree );
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You might need to clear the Items property rst, depending on whether you want to retain the existing contents of the list. For example:
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towerNames.Items.Clear();
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Initialize a check box or radio button control Handle an event for a control or form
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Set the IsChecked property to true or false. For example:
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novice.IsChecked = true;
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In the XAML pane, add code to specify the event, and then either select an existing method that has the appropriate signature or click the <Add New Event> command on the shortcut menu that appears, and then write the code that handles the event in the event method that is created.
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23
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Working with Menus and Dialog Boxes
After completing this chapter, you will be able to:
Create menus for Microsoft Windows Presentation Foundation (WPF) applications by using the Menu and MenuItem classes. Perform processing in response to menu events when a user clicks a menu command. Create context-sensitive pop-up menus by using the ContextMenu class. Manipulate menus through code and create dynamic menus. Use Windows common dialog boxes in an application to prompt the user for the name of a le. In 22, Introducing Windows Presentation Foundation, you saw how to create a simple WPF application made up of a selection of controls and events. Many professional Microsoft Windows based applications also provide menus containing commands and options, giving the user the ability to perform various tasks related to the application. In this chapter, you will learn how to create menus and add them to forms by using the Menu control. You will see how to respond when the user clicks a command on a menu. You ll learn how to create pop-up menus whose contents vary according to the current context. Finally, you will nd out about the common dialog classes supplied as part of the WPF library. With these dialog classes, you can prompt the user for frequently used items, such as les and printers, in a quick, easy, and familiar manner.
Menu Guidelines and Style
If you look at most Windows-based applications, you ll notice that some items on the menu bar tend to appear repeatedly in the same place, and the contents of these items are often predictable. For example, the File menu is typically the rst item on the menu strip, and on this menu you typically nd commands for creating a new document, opening an existing document, saving the document, printing the document, and exiting the application. Note The term document means the data that the application manipulates. In Microsoft Of ce
Excel, it would be a worksheet; in the Bell Ringers application that you created in 22, it could be the details of a new member.
Part IV
Working with Windows Applications
The order in which these commands appear tends to be the same across applications; for example, the Exit command is invariably the last command on the File menu. There might be other application-speci c commands on the File menu as well. An application often has an Edit menu containing commands such as Cut, Paste, Clear, and Find. There are usually some additional application-speci c menus on the menu bar, but again, convention dictates that the nal menu is the Help menu, which contains access to Help as well as about information, which contains copyright and licensing details for the application. In a well-designed application, most menus are predictable and help ensure that the application is easy to learn and use. Tip Microsoft publishes a full set of guidelines for building intuitive user interfaces, including menu design, on the Microsoft Web site at http://msdn2.microsoft.com/en-us/library /Aa286531.aspx.
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