Azure Functions Table Binding: How do I update a row?

Question

I am trying to update a row in an Azure table based on an Azure Function. I see that the Table bindings can handle an ICollector which has an Add method which will add a row

Answer 1

With today's bindings, you can set an ETag property to the value * to do an upsert:

[FunctionName("Function1")]
public static async Task Run(
    [HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,
    ILogger log,
    [Table("test")] IAsyncCollector table)
{
    log.LogInformation("C# HTTP trigger function processed a request.");

    string name = req.Query["name"];
    if (name == null)
        return new BadRequestResult();

    await table.AddAsync(new PocoClass { Name = name });
    return new OkObjectResult($"Hello, {name}");
}

public sealed class PocoClass
{
    public string PartitionKey { get; } = "partition";
    public string RowKey { get; } = "row";
    public string ETag { get; } = "*";
    public string Name { get; set; }
}