How to get status code of the response from web service call

Question

I am trying to troubleshoot the response object I get from the web service call.

When I try response.StatusCode in ItemService.cs. Says

does not contain definition for 'Statuscode'. Are you missing directive or assembly reference.

I would appreciate if anyone could advise me on how to catch the exact response code and error message.

ItemService.cs

public async Task<List<Item>> GetItems()
{
    var response = await _httpClient.GetFromJsonAsync<List<Item>>("api/item");
    if(response.StatusCode)// error
    {}
}

Yong Shun · Accepted Answer · 2022-11-20 10:00:35Z

1

You need to use HttpClient.GetAsync method to return the value of Task<HttpResponseMessage>.

In the HttpResponseMessage class, it contains StatusCode property which is what you need.

Updated: To check whether the response returns a success code, you should use the IsSuccessStatusCode property. Otherwise, you should compare the status code below:

if (response.StatusCode != HttpStatusCode.OK)

Next, extract the content from the HttpResponseMessage with HttpContentJsonExtensions.ReadFromJsonAsync method.

public async Task<List<Item>> GetItems()
{
    var response = await _httpClient.GetAsync("api/Item");

    if (!response.IsSuccessStatusCode)
    {
        Console.WriteLine(response.StatusCode);

        return new List<Item>();
    }

    return await response.Content.ReadFromJsonAsync<List<Item>>();
}

Reference

Make HTTP requests using IHttpClientFactory in ASP.NET Core (CreateClient section with demo)

edited Nov 20, 2022 at 10:00

answered Nov 20, 2022 at 8:23

Yong Shun

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2 Comments

Sarahrb Over a year ago

Using if (System.Convert.ToBoolean(response.StatusCode)) worked. Tweaking the code as edited above, Helped.

Yong Shun Over a year ago

Hi, I update my answer for the checking StatusCode part. Thanks.

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