functions-debug-event-grid-trigger-local.md

title	description	author	ms.topic	ms.date	ms.author
Azure Functions Event Grid local debugging	Learn to locally debug Azure Functions triggered by an Event Grid event	craigshoemaker	conceptual	10/18/2018	cshoe

Azure Function Event Grid Trigger Local Debugging

This article demonstrates how to debug a local function that handles an Azure Event Grid event raised by a storage account.

Prerequisites

• Create or use an existing function app
• Create or use an existing storage account. Event Grid notification subscription can be set on Azure Storage accounts for BlobStorage, StorageV2, or Data Lake Storage Gen2.
• Download ngrok to allow Azure to call your local function

Create a new function

Open your function app in Visual Studio and, right-click on the project name in the Solution Explorer and click Add > New Azure Function.

In the New Azure Function window, select Event Grid trigger and click OK.

Once the function is created, open the code file and copy the URL commented out at the top of the file. This location is used when configuring the Event Grid trigger.

Then, set a breakpoint on the line that begins with log.LogInformation.

Next, press F5 to start a debugging session.

[!INCLUDE functions-event-grid-local-dev]

Debug the function

Once the Event Grid recognizes a new file is uploaded to the storage container, the break point is hit in your local function.

Clean up resources

To clean up the resources created in this article, delete the test container in your storage account.

Next steps

• Automate resizing uploaded images using Event Grid
• Event Grid trigger for Azure Functions