C# UWP错误（RPC_E_错误_线程）
这个错误可能已经出现过很多次了，并且通过对代码进行一些更改以在UI线程而不是工作线程上运行特定的代码来避免。但在我的情况下，情况就不同了 问题： 在我的应用程序中，我无法实现C# UWP错误（RPC_E_错误_线程）,c#,multithreading,uwp,C#,Multithreading,Uwp,这个错误可能已经出现过很多次了，并且通过对代码进行一些更改以在UI线程而不是工作线程上运行特定的代码来避免。但在我的情况下，情况就不同了 问题： 在我的应用程序中，我无法实现增量加载，因为我尝试过，但每次都会失败，并且没有得到任何结果。所以我决定对GridViewscroll做同样的事情，所以我在GridView中获得了ScrollView，然后我将其与ViewChnaged绑定，当滚动结束时，我调用我的函数从互联网加载更多项目 大多数情况下，一切正常，但随后出现以下例外情况 应用程序调用了为不
增量加载GridViewGridViewScrollViewViewChnaged异常StackTrace来源是“Windows” at Windows.UI.Xaml.Controls.TextBlock..ctor()
at WatchfreeWebsite.MoviesPage.<>c__DisplayClass27_0.<<LoadHtmlDocument>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at WatchfreeWebsite.MoviesPage.<GridViewScroll_ViewChanged>d__21.MoveNext()
public TVShowsPage（）
{
初始化组件（）；
NavigationCacheMode=NavigationCacheMode.Enabled；
this.Loaded+=TVShowsPage\u Loaded；
LoadHtmlDocument（）；
TVShowsList=新的ObservableCollection（）；
}
已加载私有void TVShowsPage_（对象发送方，路由目标）
{
sv=ViewHelper.FindVisualTreeObject（dataGrid）.OfType（）.First（）；
sv.ViewChanged+=TVGridScroll\u ViewChanged；
}
私有异步void TVGridScroll_ViewChanged（对象发送方，ScrollViewServiceChangedEventArgs e）
{
var currentScroll=垂直偏移量；
var maxScroll=sv.ScrollableHeight；
如果（currentScroll==maxScroll）
{
var pBar=newprogressbar（）；
pBar.IsIndeterminate=真；
dataGrid.Footer=pBar；
//到达终点
尝试
{
等待加载HtmlDocument（）；
}
捕获（例外情况除外）
{
ErrorDialog（“加载数据时发生错误\n错误为：“+ex.HResult+”\n消息：“+ex.Message”）；
}
}
}
私有任务加载HtmlDocument（）
{
尝试
{
字符串url=“”；
返回任务。运行（异步（）=>
{
如果（首次运行）
{
url=TVShowsBaseLink；
currentPageLink=TVShowsBaseLink；
等待Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync（CoreDispatcherPriority.Normal，
() =>
{
//#pragma警告禁用
lv.showsync（）；
//#pragma警告恢复
});
}
其他的
{
url=等待GetNextPageLink（）；
currentPageLink=url；
如果（url==“”| | url==null）
{
dataGrid.Footer=new TextBlock（）.Text=“未找到更多项。”；
lv.Hide（）；
返回；
}
}
var doc=新的HtmlDocument（）；
if（NetworkAvailable（））
{
doc=等待新的HtmlWeb（）.LoadFromWebAsync（url）；
}
其他的
{
doc=null；
lv.Hide（）；
返回；
}
如果（doc！=null）
{
链接（doc）；
}
});
}
捕获（例外情况除外）
{
ErrorDialog（“下载网页时出错”+ex.Message）；
返回null；
}
}
专用异步无效标题（HtmlDocument文档）
{
尝试
{
foreach（doc.DocumentNode.subjects（“a”）中的var链接，其中（t=>t.Attributes.Contains（“title”））
{
if（link！=null&&link.InnerText！=“WatchFree.to”&&link.InnerText！=“电影”&&link.InnerText！=“电视节目”）
{
字符串x=link.GetAttributeValue（“title”，null）；
x=x.替换（“手表存放柜”）；
x=x.Trim（）；
x=newregex（@“（\（\d{4}\）（？：\s*\1）+”）。替换（x，“$1”）。Trim（）；
TVShowsTitles[numberOfTitles]=x；
numberOfTitles++；
如果（numberOfTitles==numberOfLinks）
{
打破
}
}
}
等待Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync（CoreDispatcherPriority.Normal，
() =>
{
TVShowsList=ItemManager.GetTVShowsCollection（lastListItems，numberOfLinks，type）；
Bindings.Update（）；
lv.Hide（）；
TextBlock a=新的TextBlock（）；
a、 水平对齐=水平对齐.居中；
dataGrid.Header=a.Text=“电视节目”；
});
lastListItems=numberOfLinks；
firstRun=false；
}
捕获（例外情况除外）
{
ErrorDialog（“获取电影标题时出现问题。\n”+ex.Message）；
}
}
私有无效图像链接（HtmlDocument文档）
public MoviesPage()
{
InitializeComponent();
NavigationCacheMode = NavigationCacheMode.Enabled;
LoadHtmlDocument();
MoviesList = new ObservableCollection<ItemsClass>();
this.Loaded += MoviesPage_Loaded;
}
private void MoviesPage_Loaded(object sender, RoutedEventArgs e)
{
sv = ViewHelper.FindVisualTreeObject(dataGrid).OfType<ScrollViewer>().First();
sv.ViewChanged += GridViewScroll_ViewChanged;
}
private async void GridViewScroll_ViewChanged(object sender, ScrollViewerViewChangedEventArgs e)
{
var currentScroll = sv.VerticalOffset;
var maxScroll = sv.ScrollableHeight;
if (currentScroll == maxScroll)
{
var pBar = new ProgressBar();
pBar.IsIndeterminate = true;
dataGrid.Footer = pBar;
// end reached
try
{
await LoadHtmlDocument();
}
catch (Exception ex)
{
ErrorDialog("Something happened while loading data\nThe Error is: " + ex.HResult + "\nMessage: " + ex.Message);
}
}
}
public Task LoadHtmlDocument()
{
try
{
string url = "";
return Task.Run(async () =>
{
if (firstRun) // first page
{
url = MoviesBaseLink;
currentPageLink = MoviesBaseLink;
await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
//#pragma warning disable
lv.ShowAsync();
//#pragma warning restore
});
}
else
{
url = await GetNextPageLink();
currentPageLink = url;
if (url == "" || url == null)
{
TextBlock a = new TextBlock();
a.Text = "No more items found.";
dataGrid.Footer = a.HorizontalAlignment = HorizontalAlignment.Center;
lv.Hide();
return;
}
}
var doc = new HtmlDocument();
if (NetworkAvailable())
{
doc = await new HtmlWeb().LoadFromWebAsync(url);
}
else
{
doc = null;
lv.Hide();
return;
}
if (doc != null)
{
Links(doc);
}
});
}
catch (Exception ex)
{
ErrorDialog("MoviesDoc_Download_Failed" + ex.Message);
return null;
}
}
private void Links(HtmlDocument doc)
{
try
{
listItems = 0;
foreach (var link in doc.DocumentNode.Descendants("a").Where(pl => pl.Attributes.Contains("href")))
{
string dataValue = link.GetAttributeValue("href", "");
if (dataValue.StartsWith("/watch") && dataValue.EndsWith(".html"))
{
MoviesPageLinks[numberOfLinks] = MoviesBaseLink + dataValue.Trim();
listItems++;
numberOfLinks++;
}
if (numberOfLinks > 9999)
{
break;
}
}
ImageLinks(doc);
}
catch (Exception ex)
{
ErrorDialog("There was a problem while acquiring search links.\n" + ex.Message);
}
}
private void ImageLinks(HtmlDocument doc)
{
try
{
foreach (var link in doc.DocumentNode.Descendants("img").Where(d => d.Attributes.Contains("src")))
{
if (link != null)
{
if (link.Attributes["src"].Value == "/images/noposter.jpg")
{
MoviesImageLinks[numberOfImages] = @"ms-appx:///Assets/noposter.jpg";
}
else
{
MoviesImageLinks[numberOfImages] = string.Format("http:{0}", link.Attributes["src"].Value);
}
numberOfImages++;
}
if (numberOfImages == numberOfLinks)
{
break;
}
}
Titles(doc);
}
catch (Exception ex)
{
ErrorDialog("There was a problem in Image links.\n" + ex.Message);
}
}
private async void Titles(HtmlDocument doc)
{
try
{
foreach (var link in doc.DocumentNode.Descendants("a").Where(t => t.Attributes.Contains("title")))
{
if (link != null && link.InnerText != "WatchFree.to" && link.InnerText != "Movies" && link.InnerText != "TV Shows")
{
string x = link.GetAttributeValue("title", null);
x = x.Replace("Watch Putlocker", "");
x = x.Trim();
x = new Regex(@"(\(\d{4}\))(?:\s*\1)+").Replace(x, "$1").Trim();
MoviesTitles[numberOfTitles] = x;
numberOfTitles++;
if (numberOfTitles == numberOfLinks)
{
break;
}
}
}
await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
MoviesList = ItemManager.GetMovieCollection(lastListItems, numberOfLinks, type);
this.Bindings.Update();
dataGrid.Footer = null;
TextBlock b = new TextBlock();
b.HorizontalAlignment = HorizontalAlignment.Center;
dataGrid.Header = b.Text = "Recent Movies";
lv.Hide();
});
lastListItems = numberOfLinks;
firstRun = false;
}
catch (Exception ex)
{
ErrorDialog("There was a problem while acquiring movie titles.\n" + ex.Message);
}
}
private async Task<string> GetNextPageLink()
{
string lastLink = "";
string nextPageLink = "";
var doc = await new HtmlWeb().LoadFromWebAsync(currentPageLink);
foreach (var link in doc.DocumentNode.Descendants("a").Where(t => t.Attributes.Contains("href")))
{
string value = link.GetAttributeValue("href", "");
if (value.Contains("/?page=" + nextPage))
{
nextPageLink = value;
lastLink = value;
break;
}
}
//--------------------------------------
if (nextPageLink != "" && nextPageLink == lastLink)
{
nextPageLink = MoviesBaseLink + lastLink;
nextPage++;
}
return nextPageLink;
}
public TVShowsPage()
{
InitializeComponent();
NavigationCacheMode = NavigationCacheMode.Enabled;
this.Loaded += TVShowsPage_Loaded;
LoadHtmlDocument();
TVShowsList = new ObservableCollection<ItemsClass>();
}
private void TVShowsPage_Loaded(object sender, RoutedEventArgs e)
{
sv = ViewHelper.FindVisualTreeObject(dataGrid).OfType<ScrollViewer>().First();
sv.ViewChanged += TVGridScroll_ViewChanged;
}
private async void TVGridScroll_ViewChanged(object sender, ScrollViewerViewChangedEventArgs e)
{
var currentScroll = sv.VerticalOffset;
var maxScroll = sv.ScrollableHeight;
if (currentScroll == maxScroll)
{
var pBar = new ProgressBar();
pBar.IsIndeterminate = true;
dataGrid.Footer = pBar;
// end reached
try
{
await LoadHtmlDocument();
}
catch (Exception ex)
{
ErrorDialog("Something happened while loading data\nThe Error is: " + ex.HResult + "\nMessage: " + ex.Message);
}
}
}
private Task LoadHtmlDocument()
{
try
{
string url = "";
return Task.Run(async () =>
{
if (firstRun)
{
url = TVShowsBaseLink;
currentPageLink = TVShowsBaseLink;
await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
//#pragma warning disable
lv.ShowAsync();
//#pragma warning restore
});
}
else
{
url = await GetNextPageLink();
currentPageLink = url;
if (url == "" || url == null)
{
dataGrid.Footer = new TextBlock().Text = "No more items found.";
lv.Hide();
return;
}
}
var doc = new HtmlDocument();
if (NetworkAvailable())
{
doc = await new HtmlWeb().LoadFromWebAsync(url);
}
else
{
doc = null;
lv.Hide();
return;
}
if (doc != null)
{
Links(doc);
}
});
}
catch (Exception ex)
{
ErrorDialog("Error_Downloading_WebPage\n" + ex.Message);
return null;
}
}
private async void Titles(HtmlDocument doc)
{
try
{
foreach (var link in doc.DocumentNode.Descendants("a").Where(t => t.Attributes.Contains("title")))
{
if (link != null && link.InnerText != "WatchFree.to" && link.InnerText != "Movies" && link.InnerText != "TV Shows")
{
string x = link.GetAttributeValue("title", null);
x = x.Replace("Watch Putlocker", "");
x = x.Trim();
x = new Regex(@"(\(\d{4}\))(?:\s*\1)+").Replace(x, "$1").Trim();
TVShowsTitles[numberOfTitles] = x;
numberOfTitles++;
if (numberOfTitles == numberOfLinks)
{
break;
}
}
}
await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
TVShowsList = ItemManager.GetTVShowsCollection(lastListItems, numberOfLinks, type);
Bindings.Update();
lv.Hide();
TextBlock a = new TextBlock();
a.HorizontalAlignment = HorizontalAlignment.Center;
dataGrid.Header = a.Text = "TV Shows";
});
lastListItems = numberOfLinks;
firstRun = false;
}
catch (Exception ex)
{
ErrorDialog("There was a problem while acquiring movie titles.\n" + ex.Message);
}
}
private void ImageLinks(HtmlDocument doc)
{
try
{
foreach (var link in doc.DocumentNode.Descendants("img").Where(d => d.Attributes.Contains("src")))
{
if (link != null)
{
if (link.Attributes["src"].Value == "/images/noposter.jpg")
{
TVShowsImageLinks[numberOfImages] = @"ms-appx:///Assets/noposter.jpg";
}
else
{
TVShowsImageLinks[numberOfImages] = string.Format("http:{0}", link.Attributes["src"].Value);
}
numberOfImages++;
}
if (numberOfImages == numberOfLinks)
{
break;
}
}
Titles(doc);
}
catch (Exception ex)
{
ErrorDialog("There was a problem in Image links.\n" + ex.Message);
}
}
private void Links(HtmlDocument doc)
{
try
{
listItems = 0;
foreach (var link in doc.DocumentNode.Descendants("a").Where(pl => pl.Attributes.Contains("href")))
{
string dataValue = link.GetAttributeValue("href", "");
if (dataValue.StartsWith("/watch") && dataValue.EndsWith(".html"))
{
TVShowsPageLinks[numberOfLinks] = MoviesPage.MoviesBaseLink + dataValue.Trim();
numberOfLinks++;
listItems++;
}
if (numberOfLinks > 9999)
{
break;
}
}
ImageLinks(doc);
}
catch (Exception ex)
{
ErrorDialog("There was a problem while acquiring search links.\n" + ex.Message);
}
}
private async Task<string> GetNextPageLink()
{
string lastLink = "";
string nextPageLink = "";
var doc = await new HtmlWeb().LoadFromWebAsync(currentPageLink);
foreach (var link in doc.DocumentNode.Descendants("a").Where(t => t.Attributes.Contains("href")))
{
string value = link.GetAttributeValue("href", "");
if (value.Contains(@"=&page=" + nextPage))
{
lastLink = value;
nextPageLink = value;
break;
}
}
//--------------------------------------
if (nextPageLink != "" && nextPageLink == lastLink)
{
nextPageLink = MoviesPage.MoviesBaseLink + lastLink;
nextPage++;
}
return nextPageLink;
}