Windows Phone 十六、HttpClient

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HttpClient 對象也可以實現網路請求

相對於 HttpWebRequest 對象來說，HttpClient 操作更簡單，功能更強大

HttpClient 提供一系列比較簡單的API來實現基本的請求

同時也支援身分識別驗證和非同步作業

注意 Windows Runtime 平台中有兩個 HttpClient 類型，調用方式幾乎相同，以下內容使用 Windows.Web.Http 中的 HttpClient

發送資料格式

HttpFormUrlEncodedContent

HttpMultipartContent

HttpMultipartFormDataContent

HttpBufferContent

HttpStreamContent

HttpStringContent

設定 Cookie：client.DefaultRequestHeaders.Add("Cookie", "cookie_key1=CookieValue1; cookie_key2=CookieValue2;");

1     <Grid>2         <TextBox x:Name="txtUrl"/>3         <Button Content="DOWN" Click="Button_Click"/>4     </Grid>

 1         protected async override void OnNavigatedTo(NavigationEventArgs e) 2         { 3             HttpClient client = new HttpClient(); 4             client.DefaultRequestHeaders.Authorization = new Windows.Web.Http.Headers.HttpCredentialsHeaderValue("Basic", "111:222"); 5             //GET請求 6             var result = await client.GetStringAsync(new Uri("http://localhost:7080/index.ashx")); 7  8             var dict = new Dictionary<string, string>(); 9             dict.Add("ke1", "val1");10             dict.Add("ke2", "val2");11             //await client.PostAsync(new Uri("http://localhost:7080/index.ashx"), new HttpFormUrlEncodedContent(dict));12             //await client.PostAsync(new Uri("http://localhost:7080/index.ashx"), new HttpStringContent("abc"));13 14             var file = await ApplicationData.Current.LocalCacheFolder.CreateFileAsync("1.txt", CreationCollisionOption.ReplaceExisting);15             await FileIO.AppendTextAsync(file, "abcdefghijklmnopqrstuvwxyz");16             var fileStream = await file.OpenAsync(FileAccessMode.Read);17             await client.PostAsync(new Uri("http://localhost:7080/index.ashx"), new HttpStreamContent(fileStream));18         }19 20         private async void Button_Click(object sender, RoutedEventArgs e)21         {22             //定義請求Uri23             var requestUri = new Uri(txtUrl.Text);24             //建立一個Http請求用戶端HttpClient25             var client = new HttpClient();26             //建立定期監視對象27             IProgress<HttpProgress> progress = new Progress<HttpProgress>((p) =>28             {29                 //此處參數P，可以擷取到進度相關資訊30                 System.Diagnostics.Debug.WriteLine(p.BytesReceived + "/" + p.TotalBytesToReceive);31             });32             //在非同步任務中加入進度監控33             HttpResponseMessage response = await client.GetAsync(requestUri).AsTask(progress);34         }

 

Windows Phone 十六、HttpClient