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APPLIES TO: SDK v4

In this quickstart, you'll learn how to build your first bot with the Bot Framework SDK for C#, Java, JavaScript or Python, and how to test your bot with the Bot Framework Emulator.

Creating your first bot doesn't require an Azure subscription or an Azure Bot Service resource. This quickstart focuses on creating your first bot locally. If you'd like to learn how to create a bot in Azure, see Create an Azure Bot resource.

Prerequisites

Knowledge of ASP.NET Core and asynchronous programming in C#

Templates

To add the bot templates to Visual Studio, download and install the Bot Framework v4 SDK Templates for Visual Studio VSIX file.

Note

The VSIX package includes both .NET Core 2.1 and .NET Core 3.1 versions of the C# templates.When creating new bots in Visual Studio 2019, you should use the .NET Core 3.1 templates.The current bot samples use .NET Core 3.1 templates.You can find the samples that use .NET Core 2.1 templates in the 4.7-archive branch of the BotBuilder-Samples repository.For information about deploying .NET Core 3.1 bots to Azure, see how to deploy your bot to Azure.

.NET Core Templates will help you to quickly build new conversational AI bots using Bot Framework v4. As of May 2020, these templates and the code they generate require .NET Core 3.1.

To install the Bot Framework templates:

Open a console window.
Download and install .NET Core SDK download version 3.1 or later.
You can use this command to determine which version of the .NET Core command-line interface you have installed.
Install the three Bot Framework C# templates: the echo, core, and empty bot templates.
Verify the templates have been installed correctly.

GitHub - Microsoft/botbuilder-js: Welcome To The Bot ...

Note

The above installation steps will install all three Bot Framework templates. You don't need to install all the templates and can install just the ones you will use. This article makes use of the echo bot template.

Java 1.8 or later
Visual Studio Code or your favorite IDE, if you want to edit the bot code.
Install Maven
Install node.js version 12.10 or later.
An Azure account if you want to deploy to Azure.

Templates

Use the Yeoman generator to quickly set up a conversational AI bot using core AI capabilities in the Bot Framework v4. For more information, see yeoman.io.

The generator supports three different template options as shown below.

Template	Description
Echo Bot	A good template if you want a little more than 'Hello World!', but not much more. This template handles the very basics of sending messages to a bot, and having the bot process the messages by repeating them back to the user. This template produces a bot that simply 'echoes' back to the user anything the user says to the bot.
Empty Bot	A good template if you are familiar with Bot Framework v4, and simply want a basic skeleton project. Also a good option if you want to take sample code from the documentation and paste it into a minimal bot in order to learn.
Core Bot	A good template if you want to create advanced bots, as it uses multi-turn dialogs and LUIS, an AI based cognitive service, to implement language understanding. This template creates a bot that can extract places and dates to book a flight.

Install Yeoman

Assure that you have installed node.js version 12.10 or later.
Install latest npm.
Install Yeoman. Make sure to install globally.
Install generator-botbuilder-java. Make sure to install globally.
Verify that Yeoman and generator-botbuilder-java have been installed correctly.

Knowledge of restify and asynchronous programming in JavaScript
Visual Studio Code or your favorite IDE, if you want to edit the bot code.

Templates

To install Yeoman and the Yeoman generator for Bot Framework v4:

Open a terminal or elevated command prompt.
Switch to the directory for your JavaScript bots. Create it first if you don't already have one.
Make sure you have the latest versions of npm and Yeoman.
Install the Yeoman generator.Yeoman is a tool for creating applications. For more information, see yeoman.io.
Note
The install of Windows build tools listed below is only required if you use Windows as your development operating system.For some installations, the install step for restify is giving an error related to node-gyp.If this is the case you can try running this command with elevated permissions.This call may also hang without exiting if Python is already installed on your system:
Only run this command if you are on Windows.

Python 3.6, 3.7, or 3.8
Knowledge of asynchronous programming in Python

Create and enable a virtual environment

A virtual environment is a combination of a specific Python interpreter and libraries that are different from your global settings. The virtual environment is specific to a project and is maintained in the project folder. A benefit to using a virtual environment is that as you develop a project over time, the virtual environment always reflects the project's exact dependencies. To learn more about virtual environments, see Creation of virtual environments.

Navigate to the directory where you want to create your bot. Then run the following commands for your preferred platform. After you activate your virtual environment, your command line/terminal should be prefaced with (venv). This lets you know that the virtual environment is active. You can deactivate your virtual environment at any time by typing: deactivate.

macOS/Linux

Windows

Templates

Install the necessary packages by running the following pip install commands:

Create a bot

In Visual Studio, create a new bot project using the Echo Bot (Bot Framework v4 - .NET Core 3.1) template. Choose AI Bots from the project types to show only bot templates.

Thanks to the template, your project contains all the code that's necessary to create the bot in this quickstart. You don't need any additional code to test your bot.

Note

If you create a Core bot, you'll need a LUIS language model. You can create a language model at luis.ai. After creating the model, update the configuration file.

[!NOTE]> If you see that the message cannot be sent, you might need to restart your machine as ngrok didn't get the needed privileges on your system yet (only needs to be done one time).-->

GitHub - Microsoft/botbuilder-dotnet: Welcome To The Bot ...

Make sure that .NET Core 3.1 is installed.

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In Visual Studio Code, open a new terminal window.
Navigate to the directory in which you want to create your bot project.
Create a new echo bot project using the following command. Replace <your-bot-name> with the name to use for your bot project.

Open a new terminal window.
Navigate to the directory in which you want to create your bot project.
Create a new echo bot project using the following command. Replace <your-bot-name> with the name to use for your bot project.

Run the following command to create an echo bot from templates. The command uses default options for its parameters.

Yeoman prompts you for some information with which to create your bot. For this tutorial, use the default values.

The generator supports a number of command line options that can be used to change the generator's default options or to pre-seed a prompt.

Command line Option	Description
`--help, -h`	List help text for all supported command-line options
`--botName, -N`	The name given to the bot project
`--packageName, -P`	The Java package name to use for the bot
`--template, -T`	The template used to generate the project. Options are `empty` or `echo`. See https://github.com/Microsoft/BotBuilder-Samples/tree/master/generators/generator-botbuilder for additional information regarding the different template options and their functional differences.
`--noprompt`	The generator will not prompt for confirmation before creating a new bot. Any requirement options not passed on the command line will use a reasonable default value. This option is intended to enable automated bot generation for testing purposes.

Thanks to the template, your project contains all the code that's necessary to create the bot in this quickstart. You don't need any additional code to test your bot.

Note

If you create a Core bot, you'll need a LUIS language model. You can create a language model at luis.ai. After creating the model, update the configuration file.

Use the generator to create an echo bot.
Yeoman prompts you for some information with which to create your bot. For this tutorial, use the default values.

Thanks to the template, your project contains all the code that's necessary to create the bot in this quickstart. You don't need any additional code to test your bot.

Note

If you create a Core bot, you'll need a LUIS language model. You can create a language model at luis.ai. After creating the model, update the configuration file.

From your working directory, run the following command to download the echo bot template and its dependencies:
You'll be prompted to give your bot a name and description. Enter the following values:
- bot_name: echo-bot
- bot_description: A bot that echoes back user response.

Start your bot

In Visual Studio

Open your bot project.
Run the project without debugging.

This will build the application, deploy it to localhost, and launch the web browser to display the application's default.htm page. At this point, your bot is running locally on port 3978.

To run your bot from VS Code:

Open your bot project folder.
Go to Run, and then select Run Without Debugging.
- Select the .Net Core environment.
- If this command updated your launch settings, save the changes and rerun the command.

This will build the application, deploy it to localhost, and launch the web browser to display the application's default.htm page. At this point, your bot is running locally on port 3978.

To run your bot locally in a command prompt or terminal:

Change directories to the project folder for your bot.
Use dotnet run to start the bot.

This will build the application and deploy it to localhost. The application's default web page will not display, but at this point, your bot is running locally on port 3978.

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From a terminal, navigate to the directory where you saved your bot, then execute the commands listed below.
Build the Maven project and packages it into a .jar file (archive).
Run the bot locally. Replace the archive-name with the actual name from the previous command.

You are now ready to start the Emulator.

In a terminal or command prompt change directories to the one created for your bot, and start it with npm start.

At this point, your bot is running locally on port 3978.

From the command line/terminal, change directories to echo-bot.
Install the dependencies for the echo bot template.
After the dependencies are installed, run the following command to start your bot:
You will know your bot is ready to test when you see the last line shown in the screenshot below:
Copy the last for digits in the address on the last line, usually 3978; you'll need these when you use the Emulator to interact with your bot.

Start the Emulator and connect your bot

Start the Bot Framework Emulator.
Select Open Bot on the Emulator's Welcome tab.
Enter your bot's URL, which is your local host and port, with /api/messages added to the path. The address is usually: http://localhost:3978/api/messages.
Then select Connect.
Send a message to your bot, and the bot will respond back.

Additional Resources