小编tri*_*kui的帖子

我尝试使用此代码下载图像:

void downloadImage(){
 WebClient client = new WebClient();
 client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
                client.DownloadStringAsync(new Uri("http://mysite/image.png"));

        }

void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
        {
           //how get stream of image?? 
           PicToIsoStore(stream)
        }

        private void PicToIsoStore(Stream pic)
        {
            using (var isoStore = IsolatedStorageFile.GetUserStoreForApplication())
            {
                var bi = new BitmapImage();
                bi.SetSource(pic);
                var wb = new WriteableBitmap(bi);
                using (var isoFileStream = isoStore.CreateFile("somepic.jpg"))
                {
                    var width = wb.PixelWidth;
                    var height = wb.PixelHeight;
                    Extensions.SaveJpeg(wb, isoFileStream, width, height, 0, 100);
                }
            }
        }

问题是:如何获得图像流？

谢谢!

有没有办法在一个TextBlock中组合静态文本和绑定？因为StringFormat在Windows Phone 7中不起作用.我试试

<TextBlock Text="{Binding strAudioArtistName, StringFormat=StaticText: {0}}"/>

但不要工作....

谢谢

有一种方法可以使用bing贴图将地址转换为坐标吗？

谢谢

我把TiltEffect.IsTiltEnabled属性添加到了我的HubTile:

<toolkit:HubTile toolkit:TiltEffect.IsTiltEnabled="True" Title="title" Message="This is message" x:Name="name" DisplayNotification="False" Source="pB.png" Tap="tap" />

我还在页面的构造函数中将HubTile类型添加到TiltableItems集合中,每个:

public HubPage()
{
    TiltEffect.TiltableItems.Add(typeof(HubtTile));
}

但HubTile没有倾斜效果....

谢谢!

我需要在Download.file方法完成后调用Join方法.我试图添加await关键字,但它没有用

Thread myThread = new Thread(new ThreadStart(()=> await Download.file(uri)));
Thread myThread = new Thread(new ThreadStart(()=>Download.file(uri)));
myThread.Start();
myThread.Join();

class Download{     
    public static async void file(string url)
    {
        try
        {
            HttpWebRequest request;
            HttpWebResponse webResponse = null;
            request = HttpWebRequest.CreateHttp(url);
            request.AllowReadStreamBuffering = true;
            webResponse = await request.GetResponseAsync() as HttpWebResponse;
            Stream responseStream = webResponse.GetResponseStream();
            using (StreamReader reader = new StreamReader(responseStream))
            {
                string content = await reader.ReadToEndAsync();
            }
            webResponse.Close();
        }
        catch (Exception ex) {
            Debug.WriteLine(ex.Message);
        }
    }
}

谢谢

嗨,我尝试从列表框中删除所有元素:这是我的简单列表框:

 <ListBox Margin="0,0,-12,0" ItemsSource="{Binding Items}" Name="listbox" >
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel  Orientation="Horizontal" Margin="0,0,0,17" >


                            <!--Replace rectangle with image-->
                            <Image Source="{Binding Img}" />
                            <StackPanel Width="311">
                                <TextBlock  Text="{Binding Pos}" 
                            </StackPanel>
                        </StackPanel>
                    </DataTemplate>
                </ListBox.ItemTemplate>
</ListBox>

但是当我尝试删除列表框的所有元素时,错误是:

A first chance exception of type 'System.InvalidOperationException' occurred in      System.Windows.dll
System.InvalidOperationException: Operation not supported on read-only collection.
   at System.Windows.Controls.ItemCollection.ClearImpl()
   at System.Windows.PresentationFrameworkCollection`1.Clear()
   at aaaaa.MainPage.Button_Click(Object sender, RoutedEventArgs e)
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at System.Windows.Controls.Button.OnClick()
   at     System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs,   Int32 argsTypeIndex, String eventName)

 private …

我不明白错误在哪里...

using System.Xml.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;


namespace xmldow
{
    public partial class MainPage : PhoneApplicationPage
    {
        // Constructor
        public MainPage()
        {
            InitializeComponent();
        }

        private void clickBott(object sender, RoutedEventArgs e)
        {
            WebClient client = new WebClient();
            client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
            client.DownloadStringAsync(new Uri("http://example.net/ddd/my.xml"));

        }

        void client_DownloadStringCompleted(Object sender, DownloadStringCompletedEventHandler e)
        {
            throw new NotImplementedException();


        }
    }
}

这是错误:

错误1'client_DownloadStringCompleted'没有重载匹配委托'System.Net.DownloadStringCompletedEventHandler'

谢谢