The binding types 'cosmosDBTrigger' are not registered. Please ensure the type is correct and the binding extension is installed.

Question

Hi

I have created the azure function application with Cosmos Trigger by using Visual studio 2022, When ever I debug the application I was getting the error like 

The binding type(s) 'cosmosDBTrigger' are not registered. Please ensure the type is correct and the binding extension is installed.

I updated my visual studio up to date and after that also I tried then also it's giving the same error,

1. Azure Function V4
2. .net 6.0
3. Microsoft.Azure.WebJobs.Extensions.CosmosDB 4.4.1
4. Microsoft.NET.Sdk.Functions" Version 4.2.0

Thanks For the help in advance

Answer 1

The error message "The binding type(s) 'cosmosDBTrigger' are not registered. Please ensure the type is correct and the binding extension is installed." indicates that the Azure Cosmos DB binding extension is not installed. To resolve this issue, you need to install the Azure Cosmos DB extension package to your project. Run the following command in the Terminal window to add the Azure Cosmos DB extension package to your project:

dotnet add package Microsoft.Azure.WebJobs.Extensions.CosmosDB

Make sure to add this package to the correct project if you have multiple projects in your solution.

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References:

• Connect Azure Functions to Azure Cosmos DB using Visual Studio Code (programming-language-csharp)
• Connect Azure Functions to Azure Cosmos DB using Visual Studio Code (programming-language-javascript)

Answer 2

@Sravankumar Nalivela Thanks for reaching out. Can you please confirm if you don't have any nuget package installed for CosmoDB apart from Microsoft.Azure.WebJobs.Extensions.CosmosDB 4.4.1 which would cause this issue. I will suggest you to recview this document in case if you missed anything. I couldn't reproduce the issue at my end. It would be great if you can share your sample project reproducing the issue in case if you have followed all the steps in the document.