Visual Basic . NET - Wikipedia, the free encyclopedia. Visual Basic [. NET]Paradigm. Multi- paradigm: structured, imperative, object- oriented, declarative, generic, reflective and event- driven. Designed by. Microsoft. Developer. Microsoft. First appeared. 20.
- Intro: Using Visual Basic 2010 to control Arduino Uno. I know this has been done in the past a few times so here's one more. This is a skeletal Visual Basic 2010 and.
- Free VB and Visual Basic.NET icons for your programs and applications! Icons or Images can really enhance your Visual Basic 6.0 and Visual Basic.NET applications.
- A website with various source code and resources for Visual Basic and Visual Basic.Net.
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- This book is written from a Visual Basic 6.0 perspective although much of what is said is also valid for Visual Basic 5.0 and Visual Basic 4.0.
- Visual Basic [.NET] Paradigm: Multi-paradigm: structured, imperative, object-oriented, declarative, generic, reflective and event-driven: Designed by.
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- USB HID Template for Visual Basic 2005/2008/2010 Published on 29 November, 2010 Introduction. With the decline of serial and parallel ports from modern computers.
Language features. Like the BASIC programming language, Visual Basic was designed to accommodate a steep learning curve. Programmers can create both simple and. Visual Basic 2010 tutorial 1. PUBLISHED BY Microsoft Press A Division of Microsoft Corporation One Microsoft Way Redmond, Washington 98052-6399 Copyright.
Stable release. 20. June 2. 01. 5; 1. Typing discipline. Static, both strong and weak,[1]both safe and unsafe,[1]nominative.
Platform. NET Framework, Mono. OSChiefly Windows. Also on Android, BSD, i. OS, Linux, Mac OS X, Solaris and Unix.
Filename extensions. Websitemsdn. microsoft. Major implementations.
Microsoft Visual Studio, Microsoft Visual Studio Express, Sharp. Develop, Mono. Develop, . NET Framework SDK and Mono. Dialects. Microsoft Visual Basic. Influenced. Small Basic. Visual Basic . NET (VB. NET) is a multi- paradigm, object- orientedprogramming language, implemented on the .
NET Framework. Microsoft launched VB. NET in 2. 00. 2 as the successor to its original Visual Basic language.
Although the ". NET" portion was dropped in 2. Visual Basic [. NET]" to refer to all Visual Basic languages releases since 2. Visual Basic. Along with Visual C#, it is one of the two main languages targeting the . NET framework. Microsoft's integrated development environment (IDE) for developing in Visual Basic . NET language is Visual Studio. Most of Visual Studio editions are commercial; the only exceptions are Visual Studio Express and Visual Studio Community, which are freeware. In addition, . NET Framework SDK includes a freeware command- linecompiler called vbc.
Mono also includes a command- line VB. NET compiler. VB. NET uses statements to specify actions. The most common statement is an expression statement, consisting of an expression to be evaluated, on a single line. As part of that evaluation, functions or subroutines may be called and variables may be assigned new values. To modify the normal sequential execution of statements, VB.
NET provides several control- flow statements identified by reserved keywords. Structured programming is supported by several constructs including two conditional execution constructs (If … Then … Else … End If and Select Case .. Case .. End Select ) and three iterative execution (loop) constructs (Do … Loop, For … To, and For Each) .
The For … To statement has separate initialization and testing sections, both of which must be present. See examples below.) The For Each statement steps through each value in a list. In addition, in Visual Basic .
NET: There is no unified way of defining blocks of statements. Instead, certain keywords, such as "If … Then" or "Sub" are interpreted as starters of sub- blocks of code and have matching termination keywords such as "End If" or "End Sub". Statements are terminated either with a colon (": ") or with the end of line. Multiple line statements in Visual Basic . NET are enabled with " _" at the end of each such line. The need for the underscore continuation character was largely removed in version 1.
The equals sign ("=") is used in both assigning values to variable and in comparison. Round brackets (parentheses) are used with arrays, both to declare them and to get a value at a given index in one of them. Visual Basic . NET uses round brackets to define the parameters of subroutines or functions. A single quotation mark ('), placed at the beginning of a line or after any number of space or tab characters at the beginning of a line, or after other code on a line, indicates that the (remainder of the) line is a comment. Simple example[edit]The following is a very simple VB. NET program, a version of the classic "Hello world" example created as a console application: Module. Module. 1Sub. Main()' The classic "Hello World" demonstration program.
Console. Write. Line("Hello World!")End. Sub. End. Module. It prints "Hello world!" on a command- line window. Each line serves a specific purpose, as follows: This is a module definition, a division of code similar to a class, although modules can contain classes. Modules serve as containers of code that can be referenced from other parts of a program.[3]It is common practice for a module and the code file, which contains it, to have the same name; however, this is not required, as a single code file may contain more than one module and/or class definition.
It defines a subroutine called "Main". Main" is the entry point, where the program begins execution.[4]Console. Write. Line("Hello world!")This line performs the actual task of writing the output. Console is a system object, representing a command- line interface (also known as "console") and granting programmatic access to the operating system's standard streams.
The program calls the Console method Write. Line, which causes the string passed to it to be displayed on the console. Instead of Console.
Write. Line, one could use Msg. Box, which prints the message in a dialog box instead of a command- line window.[5]Complex example[edit]This piece of code is a solution to Floyd's Triangle: Imports. System. Console. Module. Program. Sub. Main()Dimrows.
As. Integer'Input validation. Do. Until. Integer. Try. Parse(Read. Line("Enter a value for how many rows to be displayed: "),rows) _. And. Alsorows> =1.
Write. Line("Allowed range is 1 and {0}",Integer. Max. Value)Loop' Output of Floyd's Triangle. Dimcurrent=1. Forrow=1. Torows. Forcolumn=1. Torow. Write("{0,- 2} ",current)current+=1. Next. Write. Line()Next. End. Sub''' < summary> ''' Shadows Console.
Read. Line with a version which takes a prompt string.''' < /summary> Function. Read. Line(Optionalprompt. As. String=Nothing)As.
String. Ifprompt. Is. Not. Nothing. Then. Write(prompt)End. If. Return. Console. Read. Line()End. Function.
End. Module. Comparison with the classic Visual Basic[edit]Whether Visual Basic . NET should be considered as just another version of Visual Basic or a completely different language is a topic of debate. There are new additions to support new features, such as structured exception handling and short- circuited expressions. Also, two important data- type changes occurred with the move to VB. NET: compared to Visual Basic 6, the Integerdata type has been doubled in length from 1. Longdata type has been doubled in length from 3. This is true for all versions of VB.
NET. A 1. 6- bit integer in all versions of VB. NET is now known as a Short. Similarly, the Windows Forms editor is very similar in style and function to the Visual Basic form editor. The things that have changed significantly are the semantics—from those of an object- based programming language running on a deterministic, reference- counted engine based on COM to a fully object- oriented language backed by the . NET Framework, which consists of a combination of the Common Language Runtime (a virtual machine using generational garbage collection and a just- in- time compilation engine) and a far larger class library. The increased breadth of the latter is also a problem that VB developers have to deal with when coming to the language, although this is somewhat addressed by the My feature in Visual Studio 2.
The changes have altered many underlying assumptions about the "right" thing to do with respect to performance and maintainability. Some functions and libraries no longer exist; others are available, but not as efficient as the "native" . NET alternatives. Even if they compile, most converted Visual Basic 6 applications will require some level of refactoring to take full advantage of the new language. Documentation is available to cover changes in the syntax, debugging applications, deployment and terminology.[6]Comparative examples[edit]The following simple examples compare VB and VB. NET syntax. They assume that the developer has created a form, placed a button on it and has associated the subroutines demonstrated in each example with the click event handler of the mentioned button. Each example creates a "Hello, World" message box after the button on the form is clicked.
Visual Basic 6: Private. Sub. Command. 1_Click()Msg. Box"Hello, World"End. Sub. VB. NET (Msg.
Box or Message. Box class can be used): Private. Sub. Button. 1_Click(sender. Asobject,e. As. Event. Args)Handles. Button. Click. Msgbox("Hello, World",,)End. Sub. Both Visual Basic 6 and Visual Basic .
NET automatically generate the Sub and End Sub statements when the corresponding button is double- clicked in design view. Visual Basic . NET will also generate the necessary Class and End Class statements. The developer need only add the statement to display the "Hello, World" message box. All procedure calls must be made with parentheses in VB. NET, whereas in Visual Basic 6 there were different conventions for functions (parentheses required) and subs (no parentheses allowed, unless called using the keyword Call). The names Command.
Button. 1 are not obligatory. However, these are default names for a command button in Visual Basic 6 and VB. NET respectively. In VB. NET, the Handles keyword is used to make the sub Button. Click a handler for the Click event of the object Button.
In Visual Basic 6, event handler subs must have a specific name consisting of the object's name ("Command. Click", hence "Command. Click"). There is a function called Message. Box. Show in the Microsoft.
Visual. Basic namespace which can be used (instead of Msg. Box) similarly to the corresponding function in Visual Basic 6. There is a controversy[7] about which function to use as a best practice (not only restricted to showing message boxes but also regarding other features of the Microsoft. Visual. Basic namespace). Some programmers prefer to do things "the . NET way", since the Framework classes have more features and are less language- specific.
Others argue that using language- specific features makes code more readable (for example, using int (C#) or Integer (VB. NET) instead of System. Int. 32). In Visual Basic 2. By. Val sender as Object, By. Val e as Event. Args has become optional. The following example demonstrates a difference between Visual Basic 6 and VB. NET. Both examples close the active window.
Visual Basic 6: Subcmd.