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Create an example serverless app with Azure Logic Apps and Azure Functions in Visual Studio

  • Článok

Applies to: Azure Logic Apps (Consumption)

You can quickly create, build, and deploy cloud-based "serverless" apps by using the services and capabilities in Azure, such as Azure Logic Apps and Azure Functions. When you use Azure Logic Apps, you can quickly and easily build workflows using low-code or no-code approaches to simplify orchestrating combined tasks. You can integrate different services, cloud, on-premises, or hybrid, without coding those interactions, having to maintain glue code, or learn new APIs or specifications. When you use Azure Functions, you can speed up development by using an event-driven model. You can use triggers that respond to events by automatically running your own code. You can use bindings to seamlessly integrate other services.

This article shows how to create an example serverless app that runs in multi-tenant Azure by using an Azure Quickstart Template. The template creates an Azure resource group project that includes an Azure Resource Manager deployment template. This template defines a basic logic app resource where a predefined a workflow includes a call to an Azure function that you define. The workflow definition includes the following components:

  • A Request trigger that receives HTTP requests. To start this trigger, you send a request to the trigger's URL.
  • An Azure Functions action that calls an Azure function that you can later define.
  • A Response action that returns an HTTP response containing the result from the function.

For more information, review the following articles:

Prerequisites

Create a resource group project

To get started, create an Azure resource group project as a container for your serverless app. In Azure, a resource group is a logical collection that you use to organize the resources for an entire app. You can then manage and deploy these resources as a single asset. For a serverless app in Azure, a resource group includes the resources from Azure Logic Apps and Azure Functions. For more information, review Resource Manager terminology.

  1. Open Visual Studio, and sign in with your Azure account, if prompted.

  2. If the start window opens, select Create a new project.

    Screenshot showing Visual Studio start window with "Create a new project" selected.

  3. If the start window doesn't open, from the File menu, select New > Project.

    Screenshot showing "File" menu open with "New" menu and "Project" selected.

  4. After the Create a new project window opens, in the search box, select the Azure Resource Group project template for either C# or Visual Basic. When you're ready, select Next. This example continues with C#.

    Screenshot showing "Create a new project" window and search box with "resource group" along with "Azure Resource Group" project template selected.

  5. After the Configure your new project window opens, provide information about your project, such as the name. When you're done, select Create.

    Screenshot showing "Configure your new project" window and project details.

  6. When the Select Azure Template window opens, from the Show templates from this location list, select Azure QuickStart (github.com/Azure/azure-quickstart-templates) as the templates location.

  7. In the search box, enter logic-app-and-function-app. From the results, select the template named quickstarts\microsoft.logic\logic-app-and-function-app. When you're done, select OK.

    Screenshot showing the "Select Azure Template" window with "Azure Quickstart" selected as the templates location and "quickstarts\microsoft.logic\logic-app-and-function-app" selected.

    Visual Studio creates your resource group project, including the solution container for your project.

    Screenshot showing your created project and solution.

  8. Next, deploy your solution to Azure.

    Important

    Make sure that you complete the deployment step. Otherwise, you can't open, review, and edit your logic app's workflow using the designer in Visual Studio.

Deploy your solution

Before you can open your logic app using the designer in Visual Studio, you have to deploy your app to Azure. The designer can then create connections to the services and resources used in your logic app's workflow.

  1. In Solution Explorer, from your resource project's shortcut menu, select Deploy > New.

    Screenshot showing Solution Explorer with project shortcut menu opened, "Deploy" menu opened, and "New" selected.

  2. After the Deploy to Resource Group window opens, follow these steps to provide the deployment information:

    1. After the window detects your current subscription, confirm your Azure subscription, or select a different subscription if you want.

    2. Create a new resource group in Azure. From the Resource group list, select Create New.

      Screenshot showing "Deploy to Resource Group" window with "Create New" selected.

    3. After the Create Resource Group window opens, provide the following information:

      Property Description
      Resource group name The name to give your resource group
      Resource group location The Azure datacenter region to host your logic app resource

      This example continues by creating a resource group in the West US region.

      Screenshot showing "Create Resource Group" window with new resource group information.

    4. Finish creating and deploying your solution, for example:

      Deployment settings

  3. If the Edit Parameters window appears, provide the resource names to use for your deployed logic app resource and function app resource, and then save your changes.

    Important

    Make sure to use globally unique names for your logic app and function app.

    Screenshot showing the "Edit Parameters" window with names for your logic app resource and function app resource.

    When Visual Studio starts deployment to your resource group, your solution's deployment status appears in the Visual Studio Output window. After deployment finishes, your logic app is live in the Azure portal.

Open and edit your deployed logic app

  1. In Solution Explorer, from the azuredeploy.json file's shortcut menu, select Open With Logic App Designer.

    Screenshot showing the "azuredeploy.json" shortcut menu with "Open With Logic App Designer" selected.

    Tip

    If you don't have this command in Visual Studio 2019, confirm that Visual Studio has the latest updates.

  2. After the workflow designer opens, you can continue by editing the workflow or adding steps. When you're done, remember to save your changes to the azuredeploy.json file.

    Screenshot showing the logic app workflow in the designer.

Create an Azure Functions project

To create a C#-based Azure function from within your solution, create a C# class library project by following the Quickstart: Create your first C# function in Azure using Visual Studio. Otherwise, to create an Azure Functions project and function using other languages, follow the following quickstarts:

Deploy functions from Visual Studio

The deployment template in your solution can deploy any Azure functions that exist in your solution from the Git repo that's specified by variables in the azuredeploy.json file. If you create and author your Functions project in your solution, you can check the project into Git source control, such as GitHub or Azure DevOps, and then update the repo variable in the azuredeploy.json file so that the template deploys your Azure function.

Manage logic apps and view run history

If you have logic app resources already deployed in Azure, you can edit, manage, view run history, and disable those apps from Visual Studio. For more information, review Manage logic apps with Visual Studio.

Next steps