Question

我在windowsphone 8上遇到了关于webclient的问题。我在我的代码上找到了一个API使用webclient。

    public void LoadData(bool refresh)
    {
        IsLoading = true;
        WebClient webclient = new WebClient();
        webclient.DownloadStringCompleted += webclient_DownloadStringCompleted;
        webclient.DownloadStringAsync(new Uri("http://api.xxxx.com/getQuestion"));
    }

    public void webclient_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
    {
        RootObject deserCustomers = JsonConvert.DeserializeObject<RootObject>(e.Result);
        foreach (var cust in deserCustomers.data)
        {
            Debug.WriteLine(cust.title);
            int length = cust.question.Length;
            string subquestion;
            if (length > 100) { subquestion = cust.question.Substring(0, 100); }
            else { subquestion = cust.question; }
            _questiondata.Add(new QuestionItem() { Title = cust.title, Question_Str = subquestion, Slug = cust.slug });
        }

        IsLoading = false;
    }

这是第一次工作，数据与网络完全相同。但是当网页更新时出现新问题，我尝试第二次调用方法LoadData，数据与web不一样。网络上的新更新问题没有出现在我的应用程序（Windows Phone）中。我该怎么办，是否有任何缓存使我的结果不像网上那样更新？

非常感谢。

Answer 1

我得到了一个帮助而且解决了。试试这个：

public void LoadData(bool refresh)
{
    IsLoading = true;
    WebClient webclient = new WebClient();
    webclient.DownloadStringCompleted += webclient_DownloadStringCompleted;
    Random random = new Random();
    webclient.DownloadStringAsync(new Uri("http://api.xxxx.com/getQuestion?random="+ random.Next().ToString()));
}

WebClient.DownloadStringAsync URL不起作用

1 个答案: