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POWindows Phone 7 XML populate to List Box error
 

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  1. POWindows Phone 7 XML populate to List Box error
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    <p>I am try to do an application which loads a remote XML and populates it to the List box. I followed this tutorial and made half way through. When I have the twitter feed url I am able to populate the content to the phone. But when I try my XML it does not show up on the screen</p> <p>During this line "System.Diagnostics.Debug.WriteLine(coupon);" I am getting the XML that I am expecting. So I am sure that up to the above code everything works fine.</p> <p>My Code </p> <pre><code>void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { if (e.Error != null) { System.Diagnostics.Debug.WriteLine("Error: "+e); } DeviceBroker dB = new DeviceBroker(); XElement coupon = XElement.Parse(e.Result); System.Diagnostics.Debug.WriteLine(coupon); MainListBox.ItemsSource = from query in coupon.Descendants("cs") select new ViewModels.LoadCoupon() { CouponName = (string)query.Element("c").Element("t").Value, //MerchantImage = dB.getBaseUri() + "images/merchant/" + (string)query.Element("ms").Element("m").Element("id") MerchantImage = dB.getBaseUri() + "images/merchant/" + (string)query.Element("c").Element("mId") + ".png" }; } &lt;d&gt; &lt;ms&gt; &lt;m id="9921" n="The Book Company" /&gt; &lt;m id="6333" n="Earth Rental" /&gt; &lt;m id="6329" n="The Organic Baker" /&gt; &lt;m id="6331" n="News Stand" /&gt; &lt;m id="6327" n="The Jam Company" /&gt; &lt;m id="6325" n="The Fruit Company" /&gt; &lt;/ms&gt; &lt;cs&gt; &lt;c id="14533" mId="9921" t="50% Off Any Book Purchase"&gt; &lt;ls&gt; &lt;l id="40145" lng="-0.0724" lat="51.5024" d="4.97" dim="45.91" intX="" intY="" intL="" /&gt; &lt;/ls&gt; &lt;cats&gt; &lt;cat id="41" /&gt; &lt;cat id="43" /&gt; &lt;/cats&gt; &lt;as /&gt; &lt;/c&gt; &lt;/cs&gt; &lt;/d&gt; </code></pre> <p>As you can see from my code I am trying to get the d->cs->c->t and d->cs->c->mId elements. I am getting NullReferenceException was unhandeled error. If I take .Value out of the code, I am not getting any error at the same time I am not getting anything on the screen as well. Can anyone please shred some light on it? Please let me know if you need any more info.</p> <p>My XAML Looks something like this.</p> <pre><code>&lt;Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0"&gt; &lt;ListBox x:Name="MainListBox"&gt; &lt;ListBox.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;StackPanel Orientation="Horizontal" Height="132"&gt; &lt;Image Source="{Binding MerchantImage}" Height="73" Width="73" VerticalAlignment="Top" Margin="0,10,8,0"/&gt; &lt;StackPanel Width="370"&gt; &lt;TextBlock Text="{Binding CouponName}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}"/&gt; &lt;/StackPanel&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;/ListBox.ItemTemplate&gt; &lt;/ListBox&gt; &lt;/Grid&gt; </code></pre>
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