//后台代码
await PageInit.talkPage.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
PageInit.talkPage.AppendToLong(content,fakeid,url,time);
});
//前台页面代码
public class ItemInGroup1
{
public string Key { get; set; }

public List<Item1> ItemContent { get; set; }
}

public class Item1
{
public string Key { get; set; }
public BitmapImage l_imagesource { get; set; }
public string l_fakeid { get; set; }
public string l_content { get; set; }
public DateTime l_time { get; set; }
}

public async void AppendToLong(string content,string fakeid,string url,DateTime time )
{
ItemInGroup1 item = new ItemInGroup1();
item.Key = DateTime.Now.ToString();
Item1 tmp = new Item1();
tmp.Key = item.Key;
tmp.l_content = content;
tmp.l_fakeid=fakeid;
BitmapImage newJpg=new BitmapImage();
try
{
var Icon = await ApplicationData.Current.LocalFolder.GetFileAsync(url);
IRandomAccessStream iconStream = await Icon.OpenAsync(FileAccessMode.Read);
newJpg.SetSource(iconStream);
}
catch
{
string l = "ms-appx:///Design/getheadimg.png";
newJpg.UriSource = new Uri(l);
}
tmp.l_imagesource=newJpg;
tmp.l_time = time;
List<Item1> tt = new List<Item1>();
tt.Add(tmp);
item.ItemContent = tt;
inView.Items.Add(item);
}

后台数据更新的时候，需要即使更新到SemanticZoom，第一次循环到那个后台代码的时候正常，可是到第二次的时候就出出异常了，怀疑是前一个操作未做完，导致线程冲突了，请问这样子操作ui线程不会形成操作队列吗，一个一个有序执行吗？