NET shows students and professionals both how to develop professional and practical database programs in a Visual Basic. NET environment by using Visual Studio. NET 4. The fully updated Second Edition: Covers both fundamentals and advanced database programming techniques Introduces three popular database systems with practical examples including MS Access, SQL Server , and Oracle Features more than fifty sample projects with detailed illustrations and explanations to help students understand key techniques and programming technologies Includes downloadable programming codes and exercise questions This book provides undergraduate and graduate students as well as database programmers and software engineers with the necessary tools to handle the database programming issues in the Visual Studio.
NET environment. NET programming textbook—covering both fundamentals and advanced-level p. NET form 4. The Conditional Operators 5. Section Three Exercises VB. NET Four- Loops 1. For Loops 3. Do Loops 4. A Times Table Programme 5. The Code for the Time Table Programme 6. Add a menu to a VB. NET Form 2. How to add code to a Menu 3. How to add a Sub Menu to your Form 4.
How to add Shortcuts to your Menu Items 5. NET menu Project 6. The Open File Dialogue Box 7. Filter files with the Open File Dialogue Box 8. The Open File Dialogue Box 9.
The Save File Dialogue Box Cut, Copy, Paste and Undo menus How to Show and Hide Controls Insert Images into a Picture Box NET form Writing code for Checkboxes NET form VB. NET Six - Debugging your code 1.
Design Time Errors 3. RunTime Errors 4. Catch in VB. NET 5. Logic Errors 6. Breakpoints and Debugging tools VB. What is an Array? Arrays and the Index Number 3. Assigning Values to an Array 4. Arrays where boundaries are not known VB. The String Variable Type 2. How to use the Trim Method 3. The difference between Char and Chars 4. How to use the InStr Method 5. How to use the Substring Method 6. Recent Books. Miscellaneous Books. Computer Languages.
Computer Science. Electrical Engineering. Linux and Unix. Microsoft and. Mobile Computing. Networking and Communications. Software Engineering. Special Topics. Web Programming. Other Categories. As these tutorials are included in many of the academic schedules, you will need to get detailed information on them.
As it will not possible for you to browse the web for every small topic, you can go for downloading the PDF files for having easy access to the information. Also tutorials, corrected exercises and practical work will make it easy for you to have a clear understanding of every topic.
No matter you are a beginner or want advanced information on any of these Visual Basic language VB topics, you can visit this Visual Basic language VB topic for complete knowledge. Moreover, all the material is free to download from this website.
Created : Size : 1. Read that again. I know this may look so out of the norm for you. But believe me many are finding it hard to find tutorials about that very same weirdo you just saw. Chances are you are here because you too are going through the same quest, finding PDF tutorials about VB on the net. Left-clicking gives you a completely different result than right-clicking; and double-clicking is usually quite different than single-clicking.
There is a logic to left-clicking versus right-clicking and this is true of nearly all Windows software. Left-clicking always "does" something. You click a button to do whatever the button does. You click a down arrow to move something down or open a drop-down box. The point is, something happens as a result.
But right-clicking usually simply opens a "context menu" that gives you more choices. The choices you get depend on the "context" where you right-click. If you right-click inside a form, a different menu of choices will be displayed than if you click in the Properties window So if you want to do something with a window on the screen, but you don't see that choice available anywhere, try right-clicking.
What you want to do may be in the context menu. I just wrote that left-clicking "does something". When you single-click the left button, you usually "select" whatever the mouse pointer is over. When you double-click things, you may be asking Visual Studio to do something more involved. In the case of components in the design window, you will open the code window and create the default event code for that component.
So avoid double-clicking unless that's what you want to do. The Visual Studio Project Types When you select "New Project", you are given a default selection of five different types of projects that you can create with Visual Basic Express 1. Sometimes, Microsoft creates blind alleys. This tutorial primarily uses Windows Forms and Lesson 1 described them Keep reading and you'll know a lot more about them.
WPF is "Windows Presentation Framework" and it's a completely new way to "present" systems to the people who use them. Microsoft uses the word "presentation" because they have opened it up to much more than just images on screens. Microsoft defines it this way: "Windows Presentation Foundation WPF provides developers with a unified programming model for building rich Windows smart client user experiences that incorporate UI, media, and documents.
But it might take quite a few years. Just use our integrated search facility to search for WPF at this site. A Class Library is a collection of software "objects" that can be used to do things inside a program. NET Framework itself is just a mammoth collection of class libraries. You can code your own as you advance in your skill as a programmer.
The the first part of this lesson for an explanation of GUI. People sometimes use them to create "lightweight" low memory and CPU use applications that can run even when Windows can't. Keep reading and you'll know a lot more about them. Everything is an object Programming today is almost exclusively "object oriented" OOP. A very fast definition of a software object is software that includes data properties and can do things methods.
A button is an object because it includes data like the size, name, and text on the button and when you click it, a program starts running. You can study objects in depth in books written about the concept, but this simple understanding will do just fine to get started. In general, everything in. NET programming is an object.
NET includes a tool that is used exclusively to find information about objects called the "Object Browser". It's usually on the Visual Studio toolbar but you can also find it under the View menu. The Object browser will give you information about all of the objects in the. NET Framework. All of the methods what an object can do , properties data in an object as well as the events subroutines that can be started by changes that the object detects are listed there in one place.
You can use this tool to learn about unfamiliar objects and look for ways that objects are used. Just for practice, you might want to search for MonthCalendar, the component we learned about in the previous lesson. Properties and the Design Window In Lesson 1, we changed all of the Properties of the control objects that we added to our project before doing anything else. That's a good habit to learn. Some of the properties of objects can be difficult to change after a lot of code has been written, so getting their values correct to start with is important.
The Properties window only shows the properties of objects when the Design window not the Code window is selected because you can't select a specific object in the Code window and Visual Studio can't determine what control object to display properties for. The Name is an example of an object property that should always be changed as soon as the object is added.
The Visual Studio Property window sorts Name to the top of the Properties window by adding parenthesis around it because the character " " sorts before alpha characters.
You should change the Text property immediately as well. When you use the Windows Forms Applicaton template for a new project, Visual Studio adds a whole hierarchy of files to your project to support the forms. Some of the files are hidden because you will never change them.
But knowing about them will help you understand how Visual Basic projects work. And sometimes you might need to look a what's in them to find difficult bugs.
The files that are added for a Windows Forms Application are different than the files for other templates. That's what makes the templates different. You can see all of the files, including the hidden files, by clicking the Show All Files icon in the Solution Explorer window.
The illustration below shows all of the default files for a project, as well as some things such as References that aren't files. Just to complete your understanding about how things work, the files and code for the project can be seen outside of Visual Studio after the project is saved.
This illustration shows The files in Windows Explorer and the default code for the Load event of a form in Notepad. It's always a bad idea to change your program outside Visual Studio. Visual Studio keeps everything coordinated. If you change the program outside Visual Studio, for example in Notepad as shown here, you will amost always get things totally messed up.
You will need to know where things are is to do things like copying the executable the end result of programming and compiling a VB.
NET program to another location; or understand how to code the file path to other files that you might reference in your project, such as a data file that has to be opened and read.
The executable for your project is in the Debug or Release Folder for the project. An executable is a ". EXE" file a program a user can run or a ". DLL" file a component that can be used by other components or programs and you can "Run" it directly from Windows. The illustration shows a default WindowsApplication1. EXE program being run in Windows.
The Form file and the Form object You'll notice that if you add a new component to your project, such as the MonthCalendar that we added in Lesson 1, no new files are added to the project.
The reason is that the code for these components is stored inside the file for the form. Actually, most of the code is in the. NET Framework, but some local code is created to make the object unique for your project. So, in addition to holding all of the code for the form object in your program, the form file does double duty by holding the code for a lot of the rest of your project.
That's why the form "file" has a different properties window than the form "object". The illustration below shows the different properties You can select the form file properties by selecting the form in the Solution Explorer window. Visual Studio does it's best to change the object Name to match the file Name, but if you change the Name in both places, is won't be the same.
This is another reason to pick a fundamental property values, like Name, as soon as you add them and then avoid changing them. Inside the code for the form, VB. NET insists that you refer to the form object as "Me" instead of using the actual name: Me. Point , Location is a property of the form. Point is an object that we haven't learned about yet. Drawing is the namespace where the Point object can be found in the.
New is a method, called the "constructor" method, of objects that is used to create a copy of the object for your program. Project properties Just like the Form has it's own properties, so does the project.
In fact, the project properties are extensive and can be quite technical. You can display a window for the project properties by selecting it in the Project menu or by right-clicking the Project in Solution Explorer and selecting Properties from the context menu.
The illustration below shows that there are eleven different tabs in the Project Properties window. That's a lot of properties!! A complete description of project properties is a more advanced topic. Programmers write code. So we still need to write some for this lesson. In Lesson 1, we wrote a very simple program that would display a date 30, 90, or days from the current date.
I suggested that you might think about how to change the program to go to your birthday at the very end. In this lesson, we'll start with the program that you coded in the first lesson and add a label that pops up if the date you go to happens to be your birthday. Computers are clever, but they can't figure out what your birthday is unless you tell them.
The first thing to add to the code is a way to tell the computer what your birthday is. In this particular case, I'm using a new statement: Const. This is a way of telling VB. NET about a value that will never change; in other words, a "constant".
We'll see a different constant supplied by Visual Basic just a little later. I add this Const to the SkipDays class outside all of the subroutines at the top of the code. This makes the entire SkipDays class the "scope" of the Const. In other words, all of the procedures in the class will be able to use the same Const.
Just as strings are enclosed in double quote marks in Visual Basic, dates are enclosed in pound symbols. That way, Visual Basic knows how to process them correctly.
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