Vscode Visual Basic

Posted : admin | On 01-05-2021

-->

This article introduces the features of the Visual Studio debugger in a step-by-step walkthrough. If you want a higher-level view of the debugger features, see First look at the debugger. When you debug your app, it usually means that you are running your application with the debugger attached. When you do this, the debugger provides many ways to see what your code is doing while it runs. You can step through your code and look at the values stored in variables, you can set watches on variables to see when values change, you can examine the execution path of your code, see whether a branch of code is running, and so on. If this is the first time that you've tried to debug code, you may want to read Debugging for absolute beginners before going through this article.

Although the demo app is Visual Basic, most of the features are applicable to C#, C++, F#, Python, JavaScript, and other languages supported by Visual Studio (F# does not support Edit-and-continue. F# and JavaScript do not support the Autos window). The screenshots are in Visual Basic.

In this tutorial, you will:

Start the debugger and hit breakpoints.
Learn commands to step through code in the debugger
Inspect variables in data tips and debugger windows
Examine the call stack

Prerequisites

You must have Visual Studio 2019 installed and the .NET Core cross-platform development workload.

Visual Studio Online will be available for free for a while. You can use VS Code Cloud on any device convenient for you (ipad, mac, android, chromebook). And we will be interested to know your impressions about it! After 7 days, the demo mode will be over. One place for all extensions for Visual Studio, Azure DevOps Services, Azure DevOps Server and Visual Studio Code. Discover and install extensions and subscriptions to create the dev environment you need. Using Visual Studio Code for PowerShell Development.; 9 minutes to read; s; In this article. Visual Studio Code is a cross-platform script editor by Microsoft. Together with the PowerShell extension, it provides a rich and interactive script editing experience, making it easier to write reliable PowerShell scripts.Visual Studio Code with the PowerShell extension is the recommended.

VS Code does not expose the DOM as part of the API. Instead this extension relies on using TextEditorDecorations to set css properties for ranges in the editor. This has a few limitations: The cursor doesn't move with the text as it shakes. Visual Studio Code is a code editor redefined and optimized for building and debugging modern web and cloud applications. Visual Studio Code is free and available on your favorite platform.

You must have Visual Studio 2017 installed and the .NET Core cross-platform development workload.

Vscode Visual Basic 6

If you haven't already installed Visual Studio, go to the Visual Studio downloads page to install it for free.

If you need to install the workload but already have Visual Studio, go to Tools > Get Tools and Features..., which opens the Visual Studio Installer. The Visual Studio Installer launches. Choose the .NET Core cross-platform development workload, then choose Modify.

Create a project

First, you'll create a .NET Core console application project. The project type comes with all the template files you'll need, before you've even added anything!

Open Visual Studio 2017.
From the top menu bar, choose File > New > Project.
In the New Project dialog box in the left pane, expand Visual Basic, and then choose .NET Core. In the middle pane, choose Console App (.NET Core). Then name the project get-started-debugging.
If you don't see the Console App (.NET Core) project template, choose the Open Visual Studio Installer link in the left pane of the New Project dialog box.
The Visual Studio Installer launches. Choose the .NET Core cross-platform development workload, and then choose Modify.

Open Visual Studio 2019.
If the start window is not open, choose File > Start Window.
On the start window, choose Create a new project.
On the Create a new project window, enter or type console in the search box. Next, choose Visual Basic from the Language list, and then choose Windows from the Platform list.
After you apply the language and platform filters, choose the Console App template for .NET Core, and then choose Next.
Note
If you do not see the Console App template, you can install it from the Create a new project window. In the Not finding what you're looking for? message, choose the Install more tools and features link. Then, in the Visual Studio Installer, choose the .NET Core cross-platform development workload.
In the Configure your new project window, type or enter get-started-debugging in the Project name box. Then, choose Next.
Choose either the recommended target framework (.NET Core 3.1) or .NET 5, and then choose Create.
Visual Studio opens your new project.

Create the application

In Program.vb, replace all of the default code with the following code instead:

Start the debugger!

Press F5 (Debug > Start Debugging) or the Start Debugging button in the Debug Toolbar.
F5 starts the app with the debugger attached to the app process, but right now we haven't done anything special to examine the code. So the app just loads and you see the console output.
In this tutorial, we'll take a closer look at this app using the debugger and get a look at the debugger features.
Stop the debugger by pressing the red stop button (Shift + F5).
In the console window, press a key to close the console window.

Set a breakpoint and start the debugger

In the For loop of the Main function, set a breakpoint by clicking the left margin of the following line of code:
name += letters(i)
A red circle appears where you set the breakpoint.
Breakpoints are one of the most basic and essential features of reliable debugging. A breakpoint indicates where Visual Studio should suspend your running code so you can take a look at the values of variables, or the behavior of memory, or whether or not a branch of code is getting run.
Press F5 or the Start Debugging button , the app starts, and the debugger runs to the line of code where you set the breakpoint.
The yellow arrow represents the statement on which the debugger paused, which also suspends app execution at the same point (this statement has not yet executed).
If the app is not yet running, F5 starts the debugger and stops at the first breakpoint. Otherwise, F5 continues running the app to the next breakpoint.
Breakpoints are a useful feature when you know the line of code or the section of code that you want to examine in detail. For information on the different types of breakpoints you can set, such as conditional breakpoints, see Using breakpoints.

Navigate code in the debugger using step commands

Mostly, we use the keyboard shortcuts here, because it's a good way to get fast at executing your app in the debugger (equivalent commands such as menu commands are shown in parentheses).

While paused in the For loop in the Main method, press F11 (or choose Debug > Step Into) twice to to advance to the SendMessage method call.
After pressing F11 twice, you should be at this line of code:
SendMessage(name, a(i))
Press F11 one more time to step into the SendMessage method.
The yellow pointer advances into the SendMessage method.
F11 is the Step Into command and advances the app execution one statement at a time. F11 is a good way to examine the execution flow in the most detail. (To move faster through code, we show you some other options also.) By default, the debugger skips over non-user code (if you want more details, see Just My Code).
Let's say that you are done examining the SendMessage method, and you want to get out of the method but stay in the debugger. You can do this using the Step Out command.
Press Shift + F11 (or Debug > Step Out).
This command resumes app execution (and advances the debugger) until the current method or function returns.
You should be back in the For loop in the Main method, paused at the SendMessage method call.
Press F11 several times until you get back to the SendMessage method call again.
While paused at the method call, press F10 (or choose Debug > Step Over) once.
Notice this time that the debugger does not step into the SendMessage method. F10 advances the debugger without stepping into functions or methods in your app code (the code still executes). By pressing F10 on the SendMessage method call (instead of F11), we skipped over the implementation code for SendMessage (which maybe we're not interested in right now). For more information on different ways to move through your code, see Navigate code in the debugger.

Navigate code using Run to Click

Press F5 to advance to the breakpoint again.
In the code editor, scroll down and hover over the Console.WriteLine method in the SendMessage method until the green Run to Click button appears on the left. The tooltip for the button shows 'Run execution to here'.
Note
The Run to Click button is new in Visual Studio 2017. (If you don't see the green arrow button, use F11 in this example instead to advance the debugger to the right place.)
Click the Run to Click button .
The debugger advances to the Console.WriteLine method.
Using this button is similar to setting a temporary breakpoint. Run to Click is handy for getting around quickly within a visible region of app code (you can click in any open file).

Restart your app quickly

Click the Restart button in the Debug Toolbar (Ctrl + Shift + F5).

When you press Restart, it saves time versus stopping the app and restarting the debugger. The debugger pauses at the first breakpoint that is hit by executing code.

The debugger stops again at the breakpoint you previously set inside the For loop.

Inspect variables with data tips

Features that allow you to inspect variables are one of the most useful features of the debugger, and there are different ways to do it. Often, when you try to debug an issue, you are attempting to find out whether variables are storing the values that you expect them to have at a particular time.

While paused on the name += letters[i] statement, hover over the letters variable and you see it's default value, the value of the first element in the array, 'f'c.
Next, hover over the name variable, and you see its current value, an empty string.
Press F5 (or Debug > Continue) a few times to iterate several times through the For loop, pausing again at the breakpoint, and hovering over the name variable each time to check its value.
The value of the variable changes with each iteration of the For loop, showing values of f, then fr, then fre, and so on.
Often, when debugging, you want a quick way to check property values on variables, to see whether they are storing the values that you expect them to store, and the data tips are a good way to do it.

Inspect variables with the Autos and Locals windows

Look at the Autos window at the bottom of the code editor.
If it is closed, open it while paused in the debugger by choosing Debug > Windows > Autos.
In the Autos window, you see variables and their current value. The Autos window shows all variables used on the current line or the preceding line (Check documentation for language-specific behavior).
Next, look at the Locals window, in a tab next to the Autos window.
Expand the letters variable to show the elements that it contains.
The Locals window shows you the variables that are in the current scope, that is, the current execution context.

Set a watch

In the main code editor window, right-click the name variable and choose Add Watch.
The Watch window opens at the bottom of the code editor. You can use a Watch window to specify a variable (or an expression) that you want to keep an eye on.
Now, you have a watch set on the name variable, and you can see its value change as you move through the debugger. Unlike the other variable windows, the Watch window always shows the variables that you are watching (they're grayed out when out of scope).

Examine the call stack

While paused in the For loop, click the Call Stack window, which is by default open in the lower right pane.
If it is closed, open it while paused in the debugger by choosing Debug > Windows > Call Stack.
Click F11 a few times until you see the debugger pause in the SendMessage method. Look at the Call Stack window.
The Call Stack window shows the order in which methods and functions are getting called. The top line shows the current function (the SendMessage method in this app). The second line shows that SendMessage was called from the Main method, and so on.
Note
The Call Stack window is similar to the Debug perspective in some IDEs like Eclipse.
The call stack is a good way to examine and understand the execution flow of an app.
You can double-click a line of code to go look at that source code and that also changes the current scope being inspected by the debugger. This action does not advance the debugger.
You can also use right-click menus from the Call Stack window to do other things. For example, you can insert breakpoints into specified functions, advance the debugger using Run to Cursor, and go examine source code. For more information, see How to: Examine the Call Stack.

Change the execution flow

Press F11 twice to run the Console.WriteLine method.
With the debugger paused in the SendMessage method call, use the mouse to grab the yellow arrow (the execution pointer) on the left and move the yellow arrow up one line, back to Console.WriteLine.
Press F11.
The debugger reruns the Console.WriteLine method (you see this in the console window output).
By changing the execution flow, you can do things like test different code execution paths or rerun code without restarting the debugger.
Warning
Often you need to be careful with this feature, and you see a warning in the tooltip. You may see other warnings, too. Moving the pointer cannot revert your application to an earlier app state.
Press F5 to continue running the app.
Congratulations on completing this tutorial!

Next steps

In this tutorial, you've learned how to start the debugger, step through code, and inspect variables. You may want to get a high-level look at debugger features along with links to more information.

Support for Java in Visual Studio Code is provided through a wide range of extensions. Combined with the power of core VS Code, these extensions give you a lightweight and performant code editor that also supports many of the most common Java development techniques.

This article will give you an overview of different capabilities of Visual Studio Code for Java developers. For a quick walkthrough of editing, running, and debugging a Java program with Visual Studio Code, use the button below.

Overview

VS Code provides essential language features such as code completion, refactoring, linting, formatting, and code snippets along with convenient debugging and unit test support. VS Code also integrates with tooling and frameworks such as Maven, Tomcat, Jetty, and Spring Boot. Leveraging the power of Visual Studio Code, Java developers get an excellent tool for both quick code editing and also the full debugging and testing cycle. It's a great choice for your Java work if you're looking for a tool which:

Is fast, lightweight, free, and open source.
Supports many other languages, not just Java.
Helps start your Java journey without installing and learning a complex IDE.
Provides great microservices support including popular frameworks, container tooling, and cloud integration.
Offers team-based collaboration features such as Visual Studio Live Share.
Improves your productivity through IntelliSense and other code-aware editing features.

Install Visual Studio Code for Java

To help you set up quickly, we recommend you use the Coding Pack for Java, which is the bundle of VS Code, the Java Development Kit (JDK), and a collection of suggested extensions by Microsoft. The Coding Pack can also be used to fix an existing development environment.

Install the Coding Pack for Java - macOS

Note: The Coding Pack for Java is only available for Windows and macOS. For other operating systems, you will need to manually install a JDK, VS Code, and Java extensions.

If you have already installed VS Code and want to add Java support to it, we recommend to use Java Extension Pack, a collection of extensions suggested by Microsoft:

Alternatively, you can add Java language support to VS Code by installing the popular Java extensions by yourself.

Download VS Code - If you haven't downloaded VS Code yet, quickly install for your platform (Windows, macOS, Linux).

There are also other popular Java extensions you can pick for your own needs, including:

Thanks to the great Java community around VS Code, the list doesn't end there. You can search for more Java extensions easily within VS Code:

Go to the Extensions view (⇧⌘X (Windows, Linux Ctrl+Shift+X)).
Filter the extensions list by typing 'java'.

This document describes some of the key features included in those Java extensions.

Getting started

NOTE: If you are using VS Code on Windows and want to take advantage of the Windows Subsystem for Linux, see Developing in WSL.

Before you start, you must have the Java SE Development Kit (JDK) on your local environment. To run the VS Code for Java extension, Java SE 11 or above version is required; for projects, VS Code for Java supports projects with version 1.5 or above. For how to configure, refer to Configure JDK.

For developers new to Java or new to VS Code, we provide a Getting Started experience. Once you've installed the Java Extension Pack, you can open the Getting Started experience from within VS Code with the Java: Getting Started command from the Command Palette. Open the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)) and type 'Java: Getting Started'.

Working with Java source files

You can use VS Code to read, write, run, and debug Java source file(s) without creating a project. VS Code for Java supports two modes, lightweight and standard. Lightweight mode is ideal for scenarios that only deal with source file(s). If you want to work with a full scale project, standard mode will be required. You can easily switch from lightweight mode to standard mode, when needed. To learn more, see Lightweight Mode.

Working with Java project

There are three things you must understand to work with Java in VS Code:

How does VS Code handle Workspaces?
How does VS Code handle Java?
How does VS Code handle Workspaces that contain Java?

VS Code Workspaces

In Visual Studio Code, a 'Workspace' means a collection of one or more filesystem folders (and their children) and all of the VS Code configurations that take effect when that 'Workspace' is open in VS Code. There are two kinds of 'Workspaces' in VS Code, 'folder workspaces' and 'multi-root workspaces'.

A 'folder workspace' is presented by VS Code when you open a filesystem folder (directory) in VS Code.

A 'multi-root workspace' can refer to multiple folders (directories) from disparate parts of the file system and VS Code displays the contents of the folder(s) of the workspace together in the File Explorer. To learn more, see Multi-root Workspaces.

Java project in VS Code

In contrast to IDEs such as IntelliJ IDEA, NetBeans, or Eclipse, the concept of a 'Java project' is provided entirely by extensions, and is not a core concept in the base VS Code. When working with 'Java projects' in VS Code, you must have the necessary extensions installed to work with those project files.

For example, Maven, Eclipse, and Gradle Java projects are supported through Language Support for Java(TM) by Red Hat, by utilizing M2Eclipse, which provides Maven support, and Buildship, which provides Gradle support through the Eclipse JDT Language Server.

With Maven for Java, you can generate projects from Maven Archetypes, browse through all the Maven projects within your workspace, and execute Maven goals easily from an embedded explorer. Projects can also be created and managed with the Project Manager for Java extension.

Visual Studio Code Install

Visual Studio Code also supports working with standalone Java files outside of a Java project, described in the Java Tutorial with VS Code.

Does Vscode Support Visual Basic

VS Code Workspaces that contain Java project

Assuming the necessary Java extensions are installed, opening a VS Code workspace that contains Java artifacts will cause those extensions to understand those artifacts and present options for working with them.

More details about Java project support can be found in Java Project Management in Visual Studio Code and Build Tools.

Editing

Code Navigation

Java in Visual Studio Code also supports source code navigation features such as search for symbol, Peek Definition, and Go to Definition. The Spring Boot Tools extension provides enhanced navigation and code completion support for Spring Boot projects.

One of the key advantages of VS Code is speed. When you open your Java source file or folder, within a few seconds, with the help of Lightweight Mode, you will be able to navigate your code base with Outline view as well as commands such as Go to Definition and Go to Reference. This is especially useful when you open a project for the first time.

Code Completion

IntelliSense is a general term for language features, including intelligent code completion (in-context method and variable suggestions) across all your files and for built-in and third-party modules. VS Code supports code completion and IntelliSense for Java through Language Support for Java(TM) by Red Hat. It also provides AI-assisted IntelliSense called IntelliCode by putting what you're most likely to use at the top of your completion list.

See also in Java Code Navigation and Editing. VS Code also supports a range of Refactoring and Linting features.

Debugging

Debugger for Java is a lightweight Java Debugger based on Java Debug Server. It works with Language Support for Java by Red Hat to allow users to debug Java code within Visual Studio Code.

Starting a debugging session is easy, click on the Run|Debug button available at the CodeLens of your main() function, or press F5. The debugger will automatically generate the proper configuration for you.

Although it's lightweight, the Java debugger supports advanced features such as expression evaluation, conditional breakpoints, and hot code replacement. For more debugging related information, visit Java Debugging.

Testing

With the support from the Java Test Runner extension, you can easily run, debug, and manage your JUnit and TestNG test cases.

For more about testing, read Testing Java.

Spring Boot, Tomcat, and Jetty

To further improve your Java productivity in VS Code, there are extensions for most popular frameworks and tools such as Spring Boot, Tomcat, and Jetty created by the community.

The Tomcat extension includes an explorer to easily navigate and manage your Tomcat servers. You can create, start, debug, stop, and rename your Tomcat server with the extension.

See Application Servers to learn more about support for Tomcat and Jetty as well as other application servers with VS Code.

Spring Boot support is provided by Pivotal. There are also Spring Initializr Java Support and Spring Boot Dashboard extensions available from Microsoft to further improve your experience with Spring Boot in Visual Studio Code.

See Spring Boot with VS Code to learn more about Spring Boot support with VS Code and also Deploy to Azure Web Apps or Deploy to Azure Spirng Cloud to learn more about deploying Spring apps to Azure from VS Code.

Next steps

You may Sign up to follow the latest of Java on Visual Studio Code.

Learn more about Java in VS Code

Read on to find out more about Visual Studio Code:

Basic Editing - Learn about the powerful VS Code editor.
Code Navigation - Move quickly through your source code.
Tasks - use tasks to build your project and more
Debugging - find out how to use the debugger with your project