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Visual Basic 2005 Demysti ed in Java
Visual Basic 2005 Demysti ed DataMatrix Recognizer In Java Using Barcode decoder for Java Control to read, scan Data Matrix ECC200 image in Java applications. www.OnBarcode.comDecode Data Matrix In Java Using Barcode decoder for Java Control to read, scan read, scan image in Java applications. www.OnBarcode.comText Data Types
Scanning Bar Code In Java Using Barcode reader for Java Control to read, scan barcode image in Java applications. www.OnBarcode.comBar Code Recognizer In Java Using Barcode reader for Java Control to read, scan read, scan image in Java applications. www.OnBarcode.comThe String and Char data types are used for text A string is simply one or more characters, usually enclosed in double quotes to indicate that a string is intended The characters may be alpha (A Z or a z), numeric (0 9), or virtually any other character you can type from your keyboard For example, the name R2D2 is a string even though it includes the numeric character 2 The String data type would be a good choice for the teacher s name, such as Genghis Khent, my students fond ( ) nickname for me The Char data type represents a single character, also enclosed in double quotes, followed by an upper- or lowercase c to indicate that it is a character rather than a string As with a string, the character may be alpha (A Z or a z), numeric (0 9), or virtually any other character you can type from your keyboard The Char data type would be a good choice for the grade you hope to earn in the class, such as an A There are other data types, some of which will be mentioned in later chapters However, these five data types, Integer, Double, String, Char, and Boolean, are the ones principally used Scanning Data Matrix ECC200 In Visual C#.NET Using Barcode reader for VS .NET Control to read, scan Data Matrix 2d barcode image in VS .NET applications. www.OnBarcode.comData Matrix ECC200 Recognizer In Visual Studio .NET Using Barcode decoder for ASP.NET Control to read, scan ECC200 image in ASP.NET applications. www.OnBarcode.comData Types of Visual Basic Properties
Data Matrix ECC200 Scanner In VS .NET Using Barcode reader for .NET framework Control to read, scan DataMatrix image in .NET applications. www.OnBarcode.comDataMatrix Scanner In Visual Basic .NET Using Barcode scanner for Visual Studio .NET Control to read, scan DataMatrix image in .NET framework applications. www.OnBarcode.comTake a look at the Properties window of the form in your project The form has many different properties These properties determine the form s height and width, background color, caption, visibility, and so on Visual Basic 2005 uses these properties when you start a project to determine the form s size, background color, and so forth Each of these properties stores a particular value The Height property stores a number that represents the height of the form The Text property stores a string that represents the title displayed by the form The Visible property stores a Boolean value that represents whether the form is visible (True) or hidden (False) You can access the values of many properties when designing your application (design time) simply by viewing them in the Properties window You also can access the values of many properties while your application is running through code (run time) In 2, we changed the Text property of the form at run time; in 3, we changed the Text property of labels at run time However, whether you are in design time or run time, the new value of a property must be of the correct data type To confirm this, in the Properties window of the form, type Jeff next to the Height property, which you can access by expanding the Size property, as shown in Figure 4-1 Then press ENTER A dialog box will display, as in Figure 4-2, warning you of an invalid property value Matrix Barcode Recognizer In Java Using Barcode recognizer for Java Control to read, scan Matrix 2D Barcode image in Java applications. www.OnBarcode.comUPC A Decoder In Java Using Barcode scanner for Java Control to read, scan GS1 - 12 image in Java applications. www.OnBarcode.comStoring Information Data Types and Variables
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Scanning Postnet 3 Of 5 In Java Using Barcode reader for Java Control to read, scan Postnet 3 of 5 image in Java applications. www.OnBarcode.comScan PDF 417 In None Using Barcode decoder for Microsoft Excel Control to read, scan PDF417 image in Office Excel applications. www.OnBarcode.comClick the Details button of the dialog box in Figure 4-2 The dialog box then will display the message, Jeff is not a valid value for Int32 As discussed previously, SystemInt32 is the name used in the NET Framework for the Integer data type That Visual Basic 2005 prevents you from changing the value of the Height property to Jeff makes sense The height must be a number Visual Basic does not know how to make a form of the height Jeff Try exploring the properties of the form in the Properties window You will see there are many different data types for the different properties Scan Barcode In None Using Barcode scanner for Office Excel Control to read, scan barcode image in Microsoft Excel applications. www.OnBarcode.comDecode Bar Code In Java Using Barcode reader for BIRT Control to read, scan barcode image in BIRT applications. www.OnBarcode.comFigure 4-2 Invalid property value warning
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You can store, access, and change the value of a property However, you cannot change what the property stands for For example, the Height property of a Form object represents the height of a form; you cannot change that property so that it instead represents the width of a form or the name of your favorite ice cream Instead, you can create a variable to store data of your choosing, such as the name of your favorite ice cream, your social security number, and so on
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