C＃HttpClient POST请求处理响应

Question

I need to make POST request to API which receives the parameters username, password, and productId.I created that part and it's working fine, but how can I handle response, when the send parameters are correct API returns status 200 and product object. In other case when send parameters are wrong API returns 200 and json object like bellow:

{
    "Username": {
        "Messages": [
            "The Username field is required."
        ]
    },
    "Password": {
        "Messages": [
            "The Password field is required."
        ]
    },
    "ProductId": {
        "Messages": [
            "The productId field is required."
        ]
    }
}

so how can I handle somethnig like this.

This is my code for POST request:

public async Task<string> PostProductId(string path)
{
    using (var client = GetHttpClient())
    {
        string content = null;
        try
        {
            string endpoint = path;

            string requestJson = JsonConvert.SerializeObject(bodyObject);
            HttpContent httpContent = new StringContent(requestJson, Encoding.UTF8, "application/json");

            var response = await client.PostAsync(endpoint, httpContent);

            content = response.Content.ReadAsStringAsync();

        }
        catch (HttpRequestException ex)
        {
            Console.WriteLine("ERROR: " + ex.Message);
            return null
        }
        return content;
    }
}

Answer 1

To return both status and object you can use IHttpActionResult .

You can do some thing like this with out testing it:

public async Task<IHttpActionResult> PostProductId(string path)
{
    using (var client = GetHttpClient())
    {
        string content = null;
        try
        {
            string endpoint = path;

            string requestJson = JsonConvert.SerializeObject(bodyObject);
            HttpContent httpContent = new StringContent(requestJson, Encoding.UTF8, "application/json");

            var response = await client.PostAsync(endpoint, httpContent);

            content = response.Content.ReadAsStringAsync();

        }
        catch (HttpRequestException ex)
        {
            Console.WriteLine("ERROR: " + ex.Message);
            return InternalServerError(ex);
        }
        return Ok(content);
    }
}

Some Ref:

• https://docs.microsoft.com/en-us/aspnet/web-api/overview/getting-started-with-aspnet-web-api/action-results
• https://docs.microsoft.com/en-us/aspnet/core/migration/webapi?view=aspnetcore-2.2