如何在 C# 中使用異步方法返回 integer？

Question

我需要將點值與 integer 進行比較，以檢查用戶是否有足夠的點數。 get_points(user) > 10

代碼：

public async int get_points(string user){
 var client = new HttpClient();
 var request = new HttpRequestMessage
 {
    Method = HttpMethod.Get,
    RequestUri = new 
    Uri("https://api.streamelements.com/kappa/v2/points/abcd/fgh"),
    Headers =
    {
        { "Accept", "application/json" },
        { "Authorization", "Bearer 123" },
    },
  };
 using (var response = await client.SendAsync(request))
 {
    response.EnsureSuccessStatusCode();
    var result = await response.Content.ReadAsStringAsync();

    JObject jObj = JObject.Parse(result);
    Console.WriteLine(jObj["points"]);

    return jObj["points"].ToObject<int>();
 }
}

錯誤：異步方法的返回類型必須為 void。

Answer 1

您可以使用Task<int>

像這樣

public async Task<int> get_points(string user){
    var client = new HttpClient();
    var request = new HttpRequestMessage
    {
        Method = HttpMethod.Get,
        RequestUri = new 
        Uri("https://api.streamelements.com/kappa/v2/points/abcd/fgh"),
        Headers =
        {
            { "Accept", "application/json" },
            { "Authorization", "Bearer 123" },
        },
    };
    using (var response = await client.SendAsync(request))
    {
        response.EnsureSuccessStatusCode();
        var result = await response.Content.ReadAsStringAsync();

        JObject jObj = JObject.Parse(result);
        Console.WriteLine(jObj["points"]);

        return jObj["points"].ToObject<int>();
    }
}

請注意，您還需要確保在調用它時等待get_points方法，因為它是一種異步方法。

int points = await get_points(user);