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Understanding Objects and Collections in VB.NET

Oct 17, 2003

📄 Contents

␡

Understanding Objects
Understanding Properties
Understanding Methods
Building a Simple Object Example Project
Understanding Collections
Using the Object Browser
Summary
Q&A
Workshop

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Using the Object Browser

Visual Basic .NET includes a useful tool that enables you to easily view members (properties, methods, and events) of all the objects in a project: the Object Browser (see Figure 3.10). This is extremely useful when dealing with objects that aren't well documented because it enables you to see all the members an object supports. To view the Object Browser, choose Object Browser from the View menu.

The Browse drop-down list in the upper-left corner of the Object Browser is used to determine the browsing scope. You can choose Active Project to view only the objects referenced in the active project, or you can choose Selected Components (the default) to view a set of selected objects. The Object Browser shows a preselected set of objects for Selected Components, but you can customize the object set by clicking the Customize button next to the Browse drop-down list. I don't recommend changing the custom object setting until you have some experience using Visual Basic objects as well as experience using the Object Browser.

Figure 3.10 The Object Browser enables you to view all properties and methods of an object.

The top-level nodes in the Objects tree are libraries. Libraries are usually DLL or EXE files on your computer that contain one or more objects. To view the objects within a library, simply expand the library node. As you select objects within a library, the list to the right of the Objects tree will show information regarding the members of the selected object (refer to Figure 3.10). For even more detailed information, click a member in the list on the right, and the Object Browser will show information about the member in the gray area below the two lists.

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