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  • Maximizing the number of true concurrent / parrallel http requests in Silverlight

    - by Clems
    Hi all. I'm using SL 4 beta and my app needs to do a lot of small http requests to the server. I believe that when exceeding the number of allowed concurrent requests, the subsequent requests are put in a queue. I am also aware that SL 4 has both a http browser stack and a http client stack, with both different limit in terms of the number of concurrent requests. Let's say call those limits MAX_BROWSER and MAX_CLIENT. Also I think I read somewhere that the number of concurrent requests is limited per domain, not overall. But I'm sure if this applies to both the http client stack. That means that you CAN have MAX_BROWSER requests to domain1.com AND MAX_BROWSER requests to domain2.com at the same time. And I even believe that sub domains are considered different so you can also have MAX_BROWSER requests to domain1.com AND MAX_BROWSER requests to sub.domain1.com at the same time. I have ownership of the services and domain names so I could easily setup sub domains for my services. Given those considerations I'm trying to optimize the number of concurrent http requests to my server. Here are few questions ? Is is possible to use both stack at the same time ? Is the subdomain/domain story true for both stacks ? None ? If so that would mean that I could potentially have a number of concurrent requests equal to : (MAX_BROWSER + MAX_CLIENT) * NUMBER_OF_DOMAINS which would be fairly good. Is this correct ? I'm kind of sharing my morning thoughts here, hoping somebody has experimented with those things. Thank you.

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  • I am deploying a Silverlight APPlication that calls a WCF Service

    - by Rico
    It Runs It Loads but when it calls the service I get An exception occurred during the operation, making the result invalid. Check InnerException for exception details. at System.ComponentModel.AsyncCompletedEventArgs.RaiseExceptionIfNecessary() at SalesSimplicityPO_SL.POSvc.GetPurchaseOrdersCompletedEventArgs.get_Result() at SalesSimplicityPO_SL.About.mySvc_GetPurchaseOrdersCompleted(Object sender, GetPurchaseOrdersCompletedEventArgs e) at SalesSimplicityPO_SL.POSvc.POSvcClient.OnGetPurchaseOrdersCompleted(Object state) What is the problem does anyone know? I load and call my web service like.. BasicHttpBinding binding = new BasicHttpBinding(); EndpointAddress address = new EndpointAddress(new Uri("http://localhost/POSystem/POSvc.svc")); POSvc.POSvcClient mySvc = new POSvc.POSvcClient(binding, address); mySvc.InsertPOCompleted += new EventHandler<SalesSimplicityPO_SL.POSvc.InsertPOCompletedEventArgs>(mySvc_InsertPOCompleted); mySvc.InsertPOAsync(InitialsTextBox.Text.ToString(), DescTextBox.Text.ToString(), ClientTextBox.Text.ToString()); Works great in debug.... What am i Doing to get this error?

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  • Where to Store ID Field In Silverlight

    - by Blake Blackwell
    I am trying to use the MVVM pattern, and I am wondering where I place an ID value. Do I create a TextBlock that has its visibility property set to collapsed? Or is there a better place to store this kind of data? Currently the command parameter is set to: CommandParameter="{Binding ElementName=Name,Path=Text}" But I'd rather it be something like: CommandParameter="{Binding ElementName=Id,Path=Text}" I'm totally up for suggestions on what the best way there is to do this, since I'm new to this pattern and presentation language. <ListBox x:Name="MyListBox" ItemsSource="{Binding MyData, Mode=TwoWay}" BorderThickness="0"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel Orientation="Horizontal"> <CheckBox x:Name="Visible" IsChecked="{Binding Visible, Mode=TwoWay}" Command="{Binding ElementName=MyListBox, Path=DataContext.MyCommand}" CommandParameter="{Binding ElementName=Name,Path=Text}" /> <TextBlock Text="{Binding Name}" /> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> EDIT: Option 1 <CheckBox x:Name="Visible" IsChecked="{Binding Visible, Mode=TwoWay}" Command="{Binding ElementName=MyListBox, Path=DataContext.MyCommand}" CommandParameter="{Binding Id}" /> This option gives me just the Id, which is useful in many situations. EDIT: Option 2 <CheckBox x:Name="Visible" IsChecked="{Binding Visible, Mode=TwoWay}" Command="{Binding ElementName=MyListBox, Path=DataContext.MyCommand}" CommandParameter="{Binding}" /> This option gives me the full model, which is even useful for my particular situation.

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  • Style the MouseOver on a Silverlight/WPF button

    - by mattruma
    Struggling with styling the mouse over for a button ... I have managed to style the button (solid red), but I would like for it to change to solid black whenever a mouse over occurs. I am new to XAML, and I can see that it wants some type of story board/animation ... not sure exactly how to do this. Any help would be greatly appreciated.

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  • MVVM (ICommand) in Silverlight

    - by Andrey Khataev
    Hello! Please, don't judge strictly if this question was discussed previously or indirectly answered in huge nearby prism and mvvm blogs. In WPF implementation of RelayCommand or DelegateCommand classes there is a such eventhandler /// <summary> /// Occurs whenever the state of the application changes such that the result of a call to <see cref="CanExecute"/> may return a different value. /// </summary> public event EventHandler CanExecuteChanged { add { CommandManager.RequerySuggested += value; } remove { CommandManager.RequerySuggested -= value; } } but in SL subset of namespaces there are no CommandManager class. And this is where I'm stuck. I haven't yet found an workaround for this in MVVM adoptation for SL (PRISM is so complex for me yet). Different simple HelloWorldMVVM apps don't deal with at all. Thanks in advance and sorry for my English -)

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  • Silverlight datagrid fails to display data.

    - by Jekke
    I have a datagrid defined in my project's XAML: <data:DataGrid IsReadOnly="True" Grid.Row="1" Grid.Column="1" x:Name="gridOfferings" Margin="10,10,10,10" AutoGenerateColumns="False"> <data:DataGrid.Columns> <data:DataGridTextColumn Binding="{Binding Trader}" DisplayIndex="0" Header="Trader" Width="Auto" FontSize="11"/> <data:DataGridTextColumn Binding="{Binding Product}" DisplayIndex="1" Header="Product" Width="Auto" FontSize="11"/> </data:DataGrid.Columns> </data:DataGrid> I bind it to a List< of custom objects: public MainPage() { InitializeComponent(); _Rows = new List<OfferingRowData>(); _Rows.Add(new OfferingRowData() { Trader = "Kameilya Loenstein", Product = "American Consolidated AAA", Price = 24.95, OfferingMade = DateTime.Now }); _Rows.Add(new OfferingRowData() { Trader = "Bill Foobar", Product = "IBM Mid-Atlantic Exotic", Price = 204.90, OfferingMade = DateTime.Now.AddMinutes(-3) }); gridOfferings.ItemsSource = _Rows; } When it shows up on the page, the column headers appear, but none of the data does. What am I doing wrong?

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  • Silverlight DataGrid Updating SelectedItem from code

    - by Mark Cooper
    When I update a datagrid SelectedItem from code (via a bound object in a ViewModel), how to I get the visual grid to highlight the newly selected item? Thanks, Mark UPDATE: This is still an issue for me. My SelectedItem property already implements change notification, but the datagrid is not VISUALLY displaying which row has been selected - i.e. it is not getting highlighted.

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  • What is difference between " * " and "Auto" in Silverlight Grid Layout Definitions

    - by user203687
    trying to understand the following: <Grid Name="Root"> <Grid.RowDefinitions> <RowDefinition Height="*" /> <RowDefinition Height="*" /> <RowDefinition Height="Auto" /> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" /> <ColumnDefinition Width="*" /> <ColumnDefinition Width="Auto" /> </Grid.ColumnDefinitions> </Grid> Can anyone help me in explaining the difference between * and Auto in the above snippet? thanks

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  • Google Web Toolkit or Microsoft Technology (Silverlight, ASP.NET)

    - by NativeByte
    We have a large code base in MFC and VB. A few applications are in .NET. All these applications interoperate with each other on the user's machine and also connect with Unix servers via sockets. Recently we have started discussing a re-write of our applications and possibility of moving a lot of these desktop applications to web (they would run in intranet). A straight forward way is rewritting them in one of the .NET technologies. But a suggestion about using Google Web tookit has popped up and the argument is that it would help creating applications that would run in a browser on both desktop and mobile devices. One of the key problem that I see is that GWT is a large abstraction over Javascript. This will require the team to learn GWT, Javascript, IDEs etc as their experience has been primarily Microsoft technologies and not Java. It would be easier for them to learn .NET technologies instead of GWT. I do not have a depth of GWT and its drawback pittfalls and do not know about a parallel Microsoft Technology that I should investigate. So I would appreciate if people here can share their views or experiences using GWT or equivalent Microsoft technology.

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  • sql locking on silverlight app

    - by immuner
    Hi, i am not sure if this is the correct term, but this is what id like to do: I have an application that uses a mssql database. This application can operate in 3 modes. mode 1) user does not alter, but only read the database mode 2) user can add rows (one at a time) onto a table in the database mode 3) user can alter several tables in the database (one person at a time) question 1) how can i ensure that when a user in in mode 3 that the database will "lock" and all logged in users who operate in mode 2 or mode 3 will not be able to change the database until he finishes? question 2) how can i ensure that while there are several users in mode 2, that there will be no conflict while they all update the table? my guess here, is that before adding a new row, you make a server query for the table's current unique keys and add the new entry. will this be safe enough though? Thanks

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  • Silverlight ItemsControl - change ItemTemplate

    - by Cornel
    I have an ItemsControl with a list of radio buttons - in this case the ItemTemplate will contain a binded radio button. The problem is that in some cases I need to replace the radio button with a check box without using any C# code. Is this possible? I thought at using a ValueConverter (C# code) but I don't know for sure if will work.

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  • silverlight treeview not loading subitems

    - by Jakob
    I'm interested in finding out why this isn't working: I have a treeview with some hierarchicaldatatemplates looking like this: <UserControl.Resources> <sdk:HierarchicalDataTemplate x:Key="nodeEntry"> <StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding Path=Title}" /> </StackPanel> </sdk:HierarchicalDataTemplate> <sdk:HierarchicalDataTemplate x:Key="rootEntry" ItemsSource="{Binding Path=Nodes}" ItemTemplate="{StaticResource nodeEntry}"> <StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding Path=Name}" /> </StackPanel> </sdk:HierarchicalDataTemplate> </UserControl.Resources> <sdk:TreeView Height="250" HorizontalAlignment="Left" ItemTemplate="{StaticResource rootEntry}" ItemsSource="{Binding ElementName=subjectDomainDataSource, Path=Data}" Name="rootTreeView" VerticalAlignment="Top" Width="180"/> The data is passed to the treeview from a domainservice using this method: public IEnumerable<Subject> GetSubjectList(Guid userid) { DataLoadOptions loadopts = new DataLoadOptions(); loadopts.LoadWith<Root>(s => s.Nodes); this.DataContext.LoadOptions = loadopts; return this.DataContext.Roots; } why then are only the root nodes shown in the treeview as if it only loaded a flat list, and not a hierarchy where the root Loads the NodesCollection?

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  • Save binarydata into a image file in c# / silverlight 3

    - by Jin
    byte[] binaryData = new Byte[pngStream.Length]; long bytesRead = pngStream.Read(binaryData, 0, (int)pngStream.Length); string base64String = System.Convert.ToBase64String(binaryData, 0, binaryData.Length); I have a binary data in Byte array. Does anybody know how to save this into any image file (png or jpg) in silverlight3 or c#? Thanks

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  • Properties window like visual studio in Silverlight

    - by Meysam Javadi
    suppose this scenario: there is a design panel like XAML designer that i added some Controls on it(in run-time with create instance of some element and add it to RootLayout.Children). now i like manipulate some properties of one control(that i now which one) with something like this. is there a any short approach to goal?

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  • Howto play video with external audio in Silverlight?

    - by Fury
    Hi all, Is there any proper method to play synchronously video and external audio, other than simply having two MediaElement (one for video source and one for audio) started simultaneously? I need to play video with different soundtracks, but I belive that just two separated MediaElements will be out of sync at some point of time. Maybe there is some way to add audio source to the existing MediaElement with video? Platform: SL3, but SL4 will be good as well. Thanks in advance.

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  • Silverlight Datagrid select on right click

    - by VexXtreme
    Hi Is there a way for a right click event to select a row in toolkit datagrid? I'm using toolkit context menu which works nicely, but the problem is, only left click is able to select rows, and I need right click to be able to do that if I want my context menu to work properly. Any help is appreciated

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  • Binding command to button in silverlight 4 using mvvm

    - by Archie
    Hello, I have a user control called HomePage.xaml. I'm creating a model instance (using MVVM pattern) in the code behind file in the constructor of page as MainViewModel model = new MainViewModel(); I have a button in HomePage.xaml which I want to bind to the command inside MainViewModel called GetData() and want to populate the data in datagrid. MainViewModel has an ObservableCollection which I would use to bind the data in datagrid. Populating the data in datagrid without binding command works fine. I'm binding the button as: <StackPanel x:Name="stkPanelInput" Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center"> <Button x:Name="buttonGetData" Width="70" Content="GetData" Command="{Binding GetData}" Click="buttonGetData_Click"/> </StackPanel> How shall I bind the command using MVVM? Thanks.

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  • Strange Behaviour in DataGrid SilverLight 3 Control

    - by Asim Sajjad
    Here is the my Xaml Code. Here I have changed the Foreground of the cell depending on the current age of the person. <data:DataGridTemplateColumn Header="First Name" Width="150" MinWidth="150" CanUserReorder="False" SortMemberPath="FirstName"> <data:DataGridTemplateColumn.CellTemplate> <DataTemplate > <TextBlock Foreground ="{Binding Path=DateOfBirth,Mode=OneWay,Converter={StaticResource CellColor}}" Text="{Binding FirstName}" ToolTipService.ToolTip="{Binding FirstName}" FontFamily="Arial" FontSize="11" VerticalAlignment="Center" Margin="5,0,0,0" /> </DataTemplate> </data:DataGridTemplateColumn.CellTemplate> </data:DataGridTemplateColumn> <data:DataGridTextColumn Foreground ="{Binding Path=DateOfBirth,Mode=OneWay,Converter={StaticResource CellColor}}" Header="Last Name" Width="150" MinWidth="150" Binding="{Binding LastName}" CanUserSort="True" IsReadOnly="True" CanUserReorder="False"/> When I run the above code it return following Exception AG_E_PARSER_BAD_PROPERTY_VALU My question is that when I remove the Foreground converter from the DataGridTextColumn Column it runs fine As the Foreground converter is applied in the DataGridTemplateColumn Column which will not through excepction. But when I used same Converter to the DataGridTextColumn it throw execption why, can anyone know why is th is behaviour thanks in advance.

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  • Silverlight + ItemsControl + Get Control Property Value

    - by Villager
    Hello, I have an ItemsControl with a DataTemplate that has been defined. My ItemsControl definition looks like the following: <ItemsControl x:Name="myItemsControl" ItemsSource="{Binding}"> <ItemsControl.ItemTemplate> <DataTemplate> <Grid> <CheckBox x:Name="myCheckBox" Content="{Binding Name}" /> </Grid> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl> This is a simplified version of my DataTemplate. Regardless, when a user clicks a button on the page, I want to loop through the items in myItemsControl and determine if the CheckBox element associated with the item is checked. How do I determine if a CheckBox is checked for a specific item within an ItemsControl? Thank you!

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  • Silverlight Navigation , Get rid of '#'

    - by Key
    Hi, I am trying to create a silverlght navigation application and it is adding this "#" sign by default in the URL. I want to use asp .net routing and somehow get rid of this "#" sign. Is this possible ? How ? Any sample or right direction will be really helpful. Thanks

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  • how to make dynamic xaml in silverlight

    - by lina
    Good day! I want to make a form - a set of questions with different answer types: some questions have a number of answers and you can check one of the answers using radiobutton, other questions you should answer using a textbox, some answers have a datetime type and you choose answer for them using a DatePicker and so on. I get all information about the questions and answer types from a WCF service. I want to make this form using making a dynamic xaml but i've naver made dynamic xaml and I don't know exactly how to make it. Please, can you give me a council about dynamic xaml or maybe you have any other ideas about how to make this form? Thank you.

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