How to cancel or stop a request initiated from UWP to Azure Mobile Apps to query data from a table?

Question

Hi,

We are using Azure Mobile Apps in our UWP app with .NET client library as explained in the below link
https://learn.microsoft.com/en-us/azure/developer/mobile-apps/azure-mobile-apps/howto/client/dotnet

We have a situation in our app to cancel or stop the request sent to query the data from the Table.

How to achieve this?

Answer 1

Hello,
Welcome to Microsoft Q&A!

How to cancel or stop a request initiated from UWP

For cancel or stop a request, you could refer to Customize request headers document. please check the custom DelegatingHandler, it has CancellationToken, you just make a property to get this token, and if you want to cancel or stop a request, just call cancel method.

public class MyHandler : DelegatingHandler  
{  
  
    public CancellationTokenSource currentSource;  
  
    protected override async Task<HttpResponseMessage>  
        SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)  
    {  

        currentSource = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);  
        // Change the request-side here based on the HttpRequestMessage  
        request.Headers.Add("x-my-header", "my value");  
  
        // Do the request  
        var response = await base.SendAsync(request, cancellationToken);  
        
     
        // Change the response-side here based on the HttpResponseMessage  
  
        // Return the modified response  
        return response;  
    }  
}  

Usage

var handel = new MyHandler();  

 // cancel if necessary.  
handel.currentSource?.Cancel();  

Thank you.

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