如何輸出WP7的HTML敏捷包

Question

我有下面的代碼來解析一個HTML頁面的一部分。

我想知道的是如何將其輸出到列表框或文本框。

每當我嘗試，我得到未處理exceltion錯誤

私人無效PhoneApplicationPage_Loaded（對象發件人，RoutedEventArgs E） {

var doc = new HtmlDocument(); 
doc.LoadHtml("http://www.sourceURL.com"); 

var node = doc.DocumentNode.Descendants("div").FirstOrDefault(x => x.Id == "FlightInfo_FlightInfoUpdatePanel"); 

var value = node.InnerHtml; 
this.textBox1.Text = value; 

異常錯誤是：

System.NullReferenceException was unhandled 
Message: NullReferenceException 

堆棧跟蹤：

at Auckland_Airport.MainPage.PhoneApplicationPage_Loaded(Object sender, RoutedEventArgs e) 
    at MS.Internal.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args) 
    at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName) 

HTML佈局是

 <div id="FlightInfo_FlightInfoUpdatePanel"> 

     <table cellspacing="0" cellpadding="0"><tbody> 
      <tr class=""><td class="airline"><img src="/images/airline logos/US.gif" title="US AIRWAYS. " alt="US AIRWAYS. " /></td><td class="flight">US5316</td><td class="codeshare">NZ46</td><td class="origin">Rarotonga</td><td class="date">02 Sep</td><td class="time">10:30</td><td class="est">21:30</td><td class="status">CHECK IN CLOSING</td></tr><tr class="alt"><td class="airline"><img src="/images/airline logos/NZ.gif" title="AIR NEW ZEALAND LIMITED. " alt="AIR NEW ZEALAND LIMITED. " /></td><td class="flight">NZ6</td><td class="codeshare">&nbsp;</td><td class="origin">Los Angeles</td><td class="date">02 Sep</td><td class="time">19:15</td><td class="est">19:15</td><td class="status">DEPARTED</td></tr><tr class=""><td class="airline"><img src="/images/airline logos/AC.gif" title="Air Canada. " alt="Air Canada. " /></td><td class="flight">AC6093</td><td class="codeshare">NZ6</td><td class="origin">Los Angeles</td><td class="date">02 Sep</td><td class="time">19:15</td><td class="est">19:15</td><td class="status">DEPARTED</td></tr><tr class="alt"><td class="airline"><img src="/images/airline class="d 
    </div> 
</div> 

更清晰的HTML

<div id="FlightInfo_FlightInfoUpdatePanel"> 

    <table cellspacing="0" cellpadding="0"><tbody> 
    <tr class=""> 
    <td class="airline"><img src="/images/airline logos/NZ.gif" title="AIR NEW ZEALAND LIMITED. " alt="AIR NEW ZEALAND LIMITED. " /></td> 
    <td class="flight">NZ8</td> 
    <td class="codeshare">&nbsp;</td> 
    <td class="origin">San Francisco</td> 
    <td class="date">01 Sep</td> 
    <td class="time">17:15</td> 
    <td class="est">18:00</td> 
    <td class="status">DEPARTED</td> 
    </tr> 
    <tr class="alt"> 
    <td class="airline"><img src="/images/airline logos/AC.gif" title="Air Canada. " alt="Air Canada. " /></td> 
    <td class="flight">AC6103</td> 
    <td class="codeshare">NZ8</td> 
    <td class="origin">San Francisco</td> 
    <td class="date">01 Sep</td> 
    <td class="time">17:15</td> 
    <td class="est">18:00</td> 

Answer 1

HtmlDocument.Load功能並不需要一個URI作爲參數，則應該收到一個結構化的HTML，你已經以某種方式從檢索服務器。

下面是使用WebClient類從服務器獲取HTML你的情況下，代碼：

 WebClient client = new WebClient(); 
     client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted); 

     client.DownloadStringAsync(new Uri(@"http://www.aucklandairport.co.nz/en/FlightInformation/DomesticArrivalsAndDepartures.aspx")); 

    } 

    void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) 
    { 
     var html = e.Result; 

     var doc = new HtmlDocument(); 
      doc.LoadHtml(html); 

     var list = doc.DocumentNode.Descendants("div").ToList(); 

     var node = doc.DocumentNode.Descendants("div").FirstOrDefault(x => x.Id == "FlightInfo_FlightInfoUpdatePanel"); 

     var value = string.Empty; 

     if (node != null) 
      value = node.InnerHtml; 
    } 

在年底，value變量保存需要進一步解析內部HTML。