silverlight

问题 I'm developing a function to return a collection, generated from an xml file. Initially, I was using a local xml file for testing, but now I'm ready to have the app download the real xml file from a server. I'm struggling to see how I could do this due to the fact a WebClient object needs to be given an OpenReadCompleted event handler - I cannot return the collection data from this, and also by the time this handler executes, the original function has ended. My original code is as follows:

问题 I would like to get distinct values in my databound combo box as an example the values it has are: blue, blue, yellow, red, orange I would like it to just display blue once. My main thought was to get all combo box values into an array, set the array as distinct and then re-populate the combo box. Is there any other way? If not how would I actually get all the values from the combo box? Thanks EDIT -- Class: public class DistinctConverter : IValueConverter { } EDIT -- Debug: 回答1: You could

问题 I'm trying to use ProtoBuf-NET in my project (it's mostly Silverlight 4 project). I'm having difficulties serializing my Model collections, they all are defined like this: private List<T> _itemsSet; public IEnumerable<T> TSet { get {return _itemsSet;} set {_itemsSet = value == null ? new List<T>() : new List<T>(value);} } public void AddT(T item) { //Do my logic here _itemsSet.Add(item); } Update: First I can't serialize it - No serializer defined for type: System.Collections.Generic

问题 I'm binding TextBlock.Visiblitiy to something, and I want to set the Binding.TargetNullValue to Collapsed , how can I do it in XAML? This one How do I set TargetNullValue to a date? does not work in Silverlight. (No x:Static ). 回答1: This is working for me in SL4: <TextBlock Text="Text" Visibility="{Binding Foo, TargetNullValue=Collapsed}"/> Where Foo: public Visibility? Foo { get; set; } 来源： https://stackoverflow.com/questions/8692862/how-to-set-targetnullvalue-to-visibility-collapsed-in

问题 Greetings everyone, I am currently developing a chromatic tuner for instruments/voice in Silverlight with a C# back-end. I am in the beginning stages and am having issues in grabbing the audio data. I am using an AudioSink class to write the audio to a memory stream when the live capture starts. The problem I am having is converting those bytes in the stream to complex numbers so that it can be fed into a FFT algorithm. I have tried the various way discussed in this post Problem to convert

问题 I need to write an application with Silverlight 4 and need to show images like wrapped on cylinder. I need some HLSL code, as I wont to do that with Effects of Silverlight. I don't wont to do that with 3D libarries for silverlight. I only need HLSL code for changing pixels. I need for my image to look like this Thanks. 回答1: This seems to be the effect you want, you may wish to change the 0.2 value to increase or decrease the effect or make this adjustable in your shader but that's a simple

问题 In a Windows Phone 7 app. I happen to have many TextBox s stacked in a ItemsControl and the behaviour across textboxes for selection is not uniform i.e. a single click on any word in any text box does not select the tapped word. First a click is consumed for focusing the text box and then another to actually select the word; but once the text box has focus, it's a single click to select any word within, until the user wants to select some other word in another textbox. Is there a way to

问题 I have a Windows Phone 7 ListBox that binds to a list of integers. I am using the default MVVM Light template, so there is a ViewModel class that contains data and a simple RelayCommand . Here is the ListBox: <ListBox ItemsSource="{Binding MyData}"> <ListBox.ItemTemplate> <DataTemplate> <Button Content="{Binding}"> <i:Interaction.Triggers> <i:EventTrigger EventName="Click"> <cmd:EventToCommand Command="{Binding ElementName=ContentGrid, Path=DataContext.TestCommand}" CommandParameter="{Binding

问题 I know by editing the ListBox 's default style like this, I can have a Button at the very end of the ListBox . <ScrollViewer x:Name="ScrollViewer" ...> <StackPanel> <ItemsPresenter /> <Button /> </StackPanel> </ScrollViewer> However, doing this will break the ListBox 's Virtualization and the rendering time becomes really long. All I can think of is, Create a dummy item and add it to the end of my item collection in the viewmodel, and have a Visibility property in the dummy object called

问题 Im running silverlight client version 4.0.50917.0 and SDK version 4.0.50826.1 I've created a simple silverlight client against a wcf pollingduplex binding: Web.config: <system.serviceModel> <extensions> <bindingExtensions> <add name="pollingDuplexHttpBinding" type="System.ServiceModel.Configuration.PollingDuplexHttpBindingCollectionElement,System.ServiceModel.PollingDuplex, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> </bindingExtensions> </extensions> <behaviors>