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  • Using TextWraping within a TextBox, inside a Grid for use within a ListBox in WP7

    - by Adam Goodchild
    I am trying to get my data to display properly within a GridLayout, which is to be used as a DataTemplate for an Item within ListBox. Here is the code associated with what I am doing: <Grid Name="FeedItemTemplate"> <Grid.RowDefinitions> <RowDefinition Height="Auto" /> <RowDefinition Height="Auto" /> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" /> <ColumnDefinition Width="*" /> <ColumnDefinition Width="Auto" /> </Grid.ColumnDefinitions> <Image Source="{Binding ProfileImage}" Grid.RowSpan="2" Height="75" Width="75" VerticalAlignment="Center" Margin="1" /> <TextBlock Text="{Binding UserName}" Grid.Column="1" Foreground="#FFC8AB14" FontSize="28" HorizontalAlignment="Left"/> <TextBlock Text="{Binding TimeStamp}" Grid.Column="2" TextWrapping="Wrap" FontSize="18" HorizontalAlignment="Center"/> <TextBlock Text="{Binding Message}" Grid.Column="1" Grid.Row="1" Grid.ColumnSpan="2" TextWrapping="Wrap" FontSize="24" /> </Grid> The issue is that using this layout, when TextWrapping is set to Wrap, the Item is displayed correctly, but when scrolling through the ListBox everything is really jittery, you cannot scroll in small increments, and it just jumps all over the place. Any reason why it does this? As I said, only when TextWrapping is set to Wrap it does this. When its not used, it scrolls fine, but the text is all along one line and off the screen.

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  • Finding distance to the closest point in a point cloud on an uniform grid

    - by erik
    I have a 3D grid of size AxBxC with equal distance, d, between the points in the grid. Given a number of points, what is the best way of finding the distance to the closest point for each grid point (Every grid point should contain the distance to the closest point in the point cloud) given the assumptions below? Assume that A, B and C are quite big in relation to d, giving a grid of maybe 500x500x500 and that there will be around 1 million points. Also assume that if the distance to the nearest point exceds a distance of D, we do not care about the nearest point distance, and it can safely be set to some large number (D is maybe 2 to 10 times d) Since there will be a great number of grid points and points to search from, a simple exhaustive: for each grid point: for each point: if distance between points < minDistance: minDistance = distance between points is not a good alternative. I was thinking of doing something along the lines of: create a container of size A*B*C where each element holds a container of points for each point: define indexX = round((point position x - grid min position x)/d) // same for y and z add the point to the correct index of the container for each grid point: search the container of that grid point and find the closest point if no points in container and D > 0.5d: search the 26 container indices nearest to the grid point for a closest point .. continue with next layer until a point is found or the distance to that layer is greater than D Basically: put the points in buckets and do a radial search outwards until a points is found for each grid point. Is this a good way of solving the problem, or are there better/faster ways? A solution which is good for parallelisation is preferred.

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  • WPF: TreeViewItem bound to an ICommand

    - by Richard
    Hi All, I am busy creating my first MVVM application in WPF. Basically the problem I am having is that I have a TreeView (System.Windows.Controls.TreeView) which I have placed on my WPF Window, I have decide that I will bind to a ReadOnlyCollection of CommandViewModel items, and these items consist of a DisplayString, Tag and a RelayCommand. Now in the XAML, I have my TreeView and I have successfully bound my ReadOnlyCollection to this. I can view this and everything looks fine in the UI. The issue now is that I need to bind the RelayCommand to the Command of the TreeViewItem, however from what I can see the TreeViewItem doesn't have a Command. Does this force me to do it in the IsSelected property or even in the Code behind TreeView_SelectedItemChanged method or is there a way to do this magically in WPF? This is the code I have: <TreeView BorderBrush="{x:Null}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"> <TreeView.Items> <TreeViewItem Header="New Commands" ItemsSource="{Binding Commands}" DisplayMemberPath="DisplayName" IsExpanded="True"> </TreeViewItem> </TreeView.Items> and ideally I would love to just go: <TreeView BorderBrush="{x:Null}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"> <TreeView.Items> <TreeViewItem Header="New Trade" ItemsSource="{Binding Commands}" DisplayMemberPath="DisplayName" IsExpanded="True" Command="{Binding Path=Command}"> </TreeViewItem> </TreeView.Items> Does someone have a solution that allows me to use the RelayCommand infrastructure I have. Thanks guys, much appreciated! Richard

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  • WPF Ignoring ProgressBar Style

    - by Nidonocu
    Following a problem in WPF 4 where the default ProgressBar template has an off-white highlight applied causing it to dull the foreground colour, I decided to extract the template and manually edit the values to white. After doing this, I put the template as a style in App.xaml for global use and the Visual Studio designer began to use it right away. However, when I run my app, the default style is still being applied: I then tried setting the style specifically using a key, then even having it as an inline style and finally as a inline template without a wrapping style for the specific progress bar and it is still ignored. What's going wrong? Current Code for progress bar: <ProgressBar Grid.Column="1" Grid.Row="2" Height="15" Width="355" Margin="0,0,0,7" IsIndeterminate="{Binding ProgressState, FallbackValue=False}" Visibility="{Binding ProgressVisibility, FallbackValue=Collapsed}" Value="{Binding ProgressValue, Mode=OneWay, FallbackValue=100}" Foreground="{Binding ProgressColor,FallbackValue=Red}"> <ProgressBar.Template> <ControlTemplate> <Grid Name="TemplateRoot" SnapsToDevicePixels="True"> <Rectangle RadiusX="2" RadiusY="2" Fill="{TemplateBinding Panel.Background}" /> ...

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  • WPF Constrain the resize of a canvas' child object to the dimensions of the canvas

    - by Scott
    Given the following XAML: <Window x:Class="AdornerTesting.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="500" Width="500" Loaded="Window_Loaded"> <Grid Name="grid"> <Canvas Name="canvas" Width="400" Height="400" Background="LightGoldenrodYellow"> <RichTextBox Name="richTextBox" Canvas.Top="10" Canvas.Left="10" BorderBrush="Black" BorderThickness="2" Width="200" Height="200" MaxWidth="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Canvas}},Path=ActualWidth}" MaxHeight="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Canvas}},Path=ActualHeight}"/> </Canvas> </Grid> </Window> and a set of adorners being added to the RichTextBox in the Loaded event like so: AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(richTextBox); adornerLayer.Add(new ResizeAdorner(richTextBox)); How do I keep from being able to resize the RichTextBox beyond the visble bounds of the Canvas? The ResizeAdorner is essentially the same code that can be found in the MSDN adorner example and it works just fine. Should I be doing something with the bindings of MaxWidth and MaxHeight in the code-behind to calculate how the RichTextBox can be resized? Or is there a way to do this in XAML?

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  • Recommendations on developing a WPF application without using MVVM or similar

    - by Metro Smurf
    We were building out the next version of an in-house thick-client application using WPF/Prism (Composite Application Library). As we were nearly done with the client our team was put under new management and shortly thereafter: We were then directed to drop the Prism framework to keep things simple. This includes not using any type of Inversion of Control. We were directed to build out the WPF application without using MVVM or similar; and more along the lines of a traditional WinForm application. The idea is that if a developer sees a control in Visual Studio’s designer view, then (s)he should be able to click on the control and see exactly what it's doing without having to traverse through a view-model (or similar). We have now been tasked with building out the WPF application using one primary Window, use a Frame Control to contain the content, and use a Ribbon outside of the frame for the menu items. Reason we were provided to use Frame Control: a. We will show a view in the Frame with a Page (not a user control) and then load the page in the Frame. b. When a new view is to be shown in the Frame, the current view (Page) will be closed/disposed and the new view (Page) will take its place in the Frame. c. When a developer looks at the Page in design view, (s)he will be able to click on any control and see exactly what is being done. Given the restrictions of 1 and 2 above, we’d like to present another method of building out the application that: Can be presented as an alternative to using the “Frame Methodology” (item 3 above) but still provides the same type of functionality. Does not use MVVM (see #1 and #2 above). Provided the direction we’ve been given, any suggestions as to an alternative we can present? I’d request that the responses be kept on the professional level and thank you in advance.

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  • How to keep relative position of WPF elements on background image

    - by Masterfu
    Hi folks, I am new to WPF, so the answer to the following question might be obvious, however it isn't to me. I need to display an image where users can set markers on (As an example: You might want to mark a person's face on a photograph with a rectangle), however the markers need to keep their relative position when scaling the image. Currently I am doing this by using a Canvas and setting an ImageBrush as Background. This displays the image and I can add elements like a Label (as replacement for a rectangle) on top of the image. But when I set a label like this, it's position is absolute and so when the underlying picture is scaled (because the user drags the window larger) the Label stays at it's absolute position (say, 100,100) instead of moving to the new position that keeps it "in sync" with the underlying image. To cut the matter short: When I set a marker on a person's eye, it shouldn't be on the person's ear after scaling the window. Any suggestions on how to do that in WPF? Maybe Canvas is the wrong approach in the first place? I could keep a collection of markers in code and recalculate their position every time the window gets resized, but I hope there is a way to let WPF do that work for me :-) I am interested in hearing your opinions on this. Thanks

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  • WPF UserControl weird binding problem

    - by Heko
    Hello! Im usign a Ribbon Window and in the "content area beneath" I have a grid in which I will be displaying UserControls. To demonstrate my problem lets take a look at this simple UserControl: <ListView x:Name="lvPersonList"> <ListView.View> <GridView> <GridViewColumn Width="120" Header="Name" DisplayMemberBinding="{Binding Name}"/> <GridViewColumn Width="120" Header="Height" DisplayMemberBinding="{Binding Height}"/> </GridView> </ListView.View> </ListView> And the code: public partial class MyUserControl: UserControl { private List<Person> personList; public TestSnpList() { InitializeComponent(); this.personList = new List<Person>(); this.personList.Add(new Person { Name = "Chuck Norris", Height = 210 }); this.personList.Add(new Person { Name = "John Rambo", Height = 200 }); this.lvPersonList.ItemsSource = personList; } } public class Person { public string Name { get; set; } public int Height { get; set; } } The parent Window: <Grid x:Name="grdContent" DockPanel.Dock="Top"> <controls:MyUserControl x:Name="myUserControl" Visibility="Visible"/> </Grid> I don't understant why this binding doesn't work. Instead of values (Name and Height) I get full class names. If I use this code in a Window it works fine. Any ideas? I would like this user contorl works for itself (it gets the data form the DB and represents it in a ListView)... Thanks!

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  • WPF Background Thread Invocation

    - by jeffn825
    Maybe I'm mis-remembering how Winforms works or I'm overcomplicating the hell out of this, but here's my problem. I have a WPF client app application that talks to a server over WCF. The current user may "log out" of the WPF client, which closes all open screens, leaves only the navigation pane, and minimizes the program window. When the user re-maximizes the program window, they are prompted to log in. Simple. But sometimes things happen on background threads - like every 5 minutes the client tries to make a WCF calls that refreshes some cached data. And what if the user is logged out when this 5 minute timer triggers? Well, then the user should be prompted to log back in...and this must of course happen on the UI thread. private static ISecurityContext securityContext; public static ISecurityContext SecurityContext { get { if (securityContext == null) { // Login method shows a window and prompts the user to log in Application.Current.Dispatcher.Invoke((Action)Login); } return securityContext; } } So far so good, right? But what happens when multiple threads hit this spot of code? Well, my first intuition was that since I'm syncrhonizing across the Application.Current.Dispatcher, I should be fine, and whichever thread hit first would be responsible for showing the login form and getting the user logged in... Not the case... Thread 1 will hit the code and call ShowDialog on the login form Thread 2 will also hit the code and will call Login as soon as Thread 1 has called ShowDialog, since calling ShowDialog unblocked Thread 1 (I believe because of the way the WPF message pump works) All I want is a synchronized way of getting the user logged back into the application...what am I missing here? Thanks in advance.

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  • Why isn't my WPF Datagrid showing data?

    - by Edward Tanguay
    This walkthrough says you can create a WPF datagrid in one line but doesn't give a full example. So I created an example using a generic list and connected it to the WPF datagrid, but it doesn't show any data. What do I need to change on the code below to get it to show data in the datagrid? ANSWER: This code works now: XAML: <Window x:Class="TestDatagrid345.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:toolkit="http://schemas.microsoft.com/wpf/2008/toolkit" xmlns:local="clr-namespace:TestDatagrid345" Title="Window1" Height="300" Width="300" Loaded="Window_Loaded"> <StackPanel> <toolkit:DataGrid ItemsSource="{Binding}"/> </StackPanel> </Window> Code Behind: using System.Collections.Generic; using System.Windows; namespace TestDatagrid345 { public partial class Window1 : Window { private List<Customer> _customers = new List<Customer>(); public List<Customer> Customers { get { return _customers; }} public Window1() { InitializeComponent(); } private void Window_Loaded(object sender, RoutedEventArgs e) { DataContext = Customers; Customers.Add(new Customer { FirstName = "Tom", LastName = "Jones" }); Customers.Add(new Customer { FirstName = "Joe", LastName = "Thompson" }); Customers.Add(new Customer { FirstName = "Jill", LastName = "Smith" }); } } }

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  • Animate UserControl in WPF?

    - by sanjeev40084
    I have two xaml file one is MainWindow.xaml and other is userControl EditTaskView.xaml. In MainWindow.xaml it consists of listbox and when double clicked any item of listbox, it displays other window (edit window) from EditView userControl. I am trying to animate this userControl everytime whenever any item from the listbox is double clicked. I added some animation in userControl however the animation only gets run once. How can i make my animation run everytime whenever any item from the listbox is clicked? <ListBox x:Name="lstBxTask" Style="{StaticResource ListBoxItems}" MouseDoubleClick="lstBxTask_MouseDoubleClick"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel> <Rectangle Style="{StaticResource LineBetweenListBox}"/> <StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding Taskname}" Style="{StaticResource TextInListBox}"/> <Button Name="btnDelete" Style="{StaticResource DeleteButton}" Click="btnDelete_Click"/> </StackPanel> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> <ToDoTask:EditTaskView x:Name="EditTask" Grid.Row="1" Grid.RowSpan="2" Grid.ColumnSpan="2" Visibility="Collapsed"/> In the MainWindow code, there is mouse double click event, which changes the visibility of EditTaskView to Visible. Suggestions?

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  • WPF TextBlock Binding to DependencyProperty

    - by Bill Campbell
    Hi, I have what I believe to be about one of the most simple cases of attempting to bind a view to a dependencyproperty in the view model. It seems that the initial changes are reflected in the view but other changes to the DP do not update the view's TextBlock. I'm probably just missing something simple but I just can't see what it is. Please take a look... My XAML has a status bar on the bottom of the window. I want to bind to the DP "VRAStatus". <StatusBar x:Name="sbar" Grid.Column="0" Grid.Row="2" Grid.ColumnSpan="2" VerticalAlignment="Bottom" Background="LightBlue" Opacity="0.4" DockPanel.Dock="Bottom" > <StatusBarItem> <TextBlock x:Name="statusBar" Text="{Binding VRAStatus}" /> </StatusBarItem> <StatusBarItem> <Separator Style="{StaticResource StatusBarSeparatorStyle}"/> </StatusBarItem> </StatusBar> My viewmodel has the DP defined: public string VRAStatus { get { return (string)GetValue(VRAStatusProperty); } set { SetValue(VRAStatusProperty, value); } } // Using a DependencyProperty as the backing store for VRAStatus. public static readonly DependencyProperty VRAStatusProperty = DependencyProperty.Register("VRAStatus", typeof(string), typeof(PenskeRouteAssistViewModel),new PropertyMetadata(string.Empty)); Then, in my code I set the DP: VRAStatus = "Test Message..."; Is there something obvious here that I am missing? In my constructor for the viewmodel I set the DP like this: VRAStatus = "Ready"; I never get the Test Message to display. Please Help. thanks in advance! Bill

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  • Handling events from user control containing a WPF textbox

    - by Tom
    I've been successful in putting a WPF textbox into an existing windows form using ElementHost and a user control. It looks like the following: Public Class MyUserControl Private _elementHost as ElementHost = New ElementHost Private _wpfTextbox as System.Windows.Controls.Textbox = New System.Windows.Controls.Textbox Public Sub New() Me.Controls.Add(_elementHost) _elementHost.Dock = DockStyle.Fill _elementHost.Child = _wpfTextbox _wpfTextbox.SpellCheck.IsEnabled = True End Sub End Class Now, when I put this user control onto a windows form, it accepts keyboard input and the form itself can get text from the textbox. However, when I try to handle keypress (or keydown, keyup) events from the user control, nothing happens. I've looked into this problem and did a bit of research but now I'm a little confused as to what I really need to be looking at. The following are the topics that I am somewhat confused about. HwndSource Relaxed delegates WPF routed events If I am interpreting everything correctly, input from WPF textboxes are handled differently compared to regular form textboxes. It seems like both aren't compatible with each other but there must be some way to "pass" keys from one to another? I'd appreciate any help.

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  • Switching to WPF, the best use of time at Visual Studio Launch 2010

    - by Stewbob
    Yes, this is a programming-related question, if a little indirectly (that's why I marked it Community Wiki right away). For better or worse, I am switching from Winforms to WPF in April. I am also going to be in attendance at the Visual Studio Launch in Las Vegas. I have a real need to get up to speed quickly in WPF, so my question is: What sessions are going to be the best use of my time? I've got some picked out already, but I'm looking for some more advice on how to wade through all the marketing fluff and get some real educational value out of these few days. I have not been to one of these events before, so I don't really know how much is marketing hype, and how much is solid content. A couple of the workshops look interesting (VPR02 and VPS02), but I don't know enough about the actual content of these to justify the extra expense right now. Any thoughts there would be appreciated. And yes, I do have WPF learning planned other than just these few days in Vegas, but since I'm going to be there anyway, I want to learn as much as I can in the time available.

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  • WPF ContextMenu bind some property to another property of the same control

    - by bebicasoft
    I have a ContextMenu and a ColumnHeaderStyle defined in Window.Resource section witch i use-it to a DataGrid ColumnHeader. My code is something like this: <ContextMenu x:Key="cm_columnHeaderMenu"/> <Style x:Key="DefaultColumnHeaderStyle" TargetType="{x:Type DataGridColumnHeader}"> <Setter Property="ContextMenu" Value="{StaticResource cm_columnHeaderMenu}" /> </Style> <DataGrid Grid.Column="2" Grid.Row="1" x:Name="dgridFiles" IsReadOnly="True" ColumnHeaderStyle="{StaticResource DefaultColumnHeaderStyle}"> I want to know if I can (and if the answer it true, then HOW I could do it) bind the ContextMenu Visibility property to same control ContextMenu Items.Count>0 property. Initially based on some other treeView control selections made there shoud be no items in the context menu, but i wish to add dinamically items in ContextMenu based on selection in treeView. This part is done, the context has those items. On some selections there are no-items, but still on the grid it appears an empty ContextMenu. So I believe the easiest part it would be to bind the Visibility to Items.Count property of the same control. Sorry if my english is not good enought, I'll try to explain better if i didnt make clear 1st time.

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  • C# / Silverlight / WPF / Fast rendering lots of circles

    - by Walt W
    I want to render a lot of circles or small graphics within either silverlight or wpf (around 1000-10000) as fast and as frequently as possible. If I have to go to DX or OGL, that's fine, but I'm wondering about doing this within either of those two frameworks first (read: it's OK if an answer is WPF-only or Silverlight-only). Also, if there is a way to access DX through WPF and render on a surface that way, I would be interested in that as well. So, what's the fastest way to draw a load of circles? They can be as plain as necessary, but they do need to have a radius. Currently I'm using DrawingVisual and a DrawingContext.DrawEllipse() command for each circle, then rendering the visual to a RenderTargetBItmap, but it becomes very slow as the number of circles rises. By the way, these circles move every frame, so caching isn't really an option unless you're going to suggest caching the individual circles . . . But their sizes are dynamic, so I'm not sure that's a great approach.

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  • Assembly-wide / root-level styles in WPF class library

    - by WarpedBoard
    I have a C# (2008/.NET 3.5) class library assembly that supports WPF (based on http://dotupdate.wordpress.com/2007/12/05/how-to-add-a-wpf-control-library-template-to-visual-c-express-2008/). I've created several windows, and am now attempting to create a common style set for them. However, as it's a class library (instead of a WPF app), I don't have an app.xaml (and its contained Application & corresponding Application.Resources) in which to store these styles for global access. So: How can I create a top-level set of style definitions that'll be seen by all xaml files in the assembly, given that I do not have app.xaml (see above)? And/or is it possible to add a working app.xaml to a class library? FYI, I did try creating a ResourceDictionary in a ResourceDictionary.xaml file, and include it in each window within a "Window.Resources" block. That turned out to solve the styling of Buttons, etc... but not for the enclosing Window. I can put 'Style="{StaticResource MyWindowStyle}"' in the Window's opening block, and it compiles and shows up in the VS Design window fine, but during actual runtime I get a parse exception (MyWindowStyle could not be found; I'm guessing Visual Studio sees the dictionary included after the line in question, but the CRL does things more sequentially and therefore hasn't loaded the ResourceDictionary yet).

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  • Hang during databinding of large amount of data to WPF DataGrid

    - by nihi_l_ist
    Im using WPFToolkit datagrid control and do the binding in such way: <WpfToolkit:DataGrid x:Name="dgGeneral" SelectionMode="Single" SelectionUnit="FullRow" AutoGenerateColumns="False" CanUserAddRows="False" CanUserDeleteRows="False" Grid.Row="1" ItemsSource="{Binding Path=Conversations}" > public List<CONVERSATION> Conversations { get { return conversations; } set { if (conversations != value) { conversations = value; NotifyPropertyChanged("Conversations"); } } } public event PropertyChangedEventHandler PropertyChanged; public void NotifyPropertyChanged(string propertyName) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } public void GenerateData() { BackgroundWorker bw = new BackgroundWorker(); bw.WorkerSupportsCancellation = bw.WorkerReportsProgress = true; List<CONVERSATION> list = new List<CONVERSATION>(); bw.DoWork += delegate { list = RefreshGeneralData(); }; bw.RunWorkerCompleted += delegate { try { Conversations = list; } catch (Exception ex) { CustomException.ExceptionLogCustomMessage(ex); } }; bw.RunWorkerAsync(); } And than in the main window i call GenerateData() after setting DataCotext of the window to instance of the class, containing GenerateData(). RefreshGeneralData() returns some list of data i want and it returns it fast. Overall there are near 2000 records and 6 columns(im not posting the code i used during grid's initialization, because i dont think it can be the reason) and the grid hangs for almost 10 secs!

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  • Bind an Incode DataTemplate in WPF

    - by Mike Bynum
    I have a WPF Application which is using MVVM. I know that there ways of doing this in XAML but I am working on a plugin architecture and came up with a solution where a plugin exposes it's viewmodel to my plugin host's viewmodel and it's datatemplate. I want to leave the lifetime management of the plugin view up to WPF. I have tried having the plugins expose a UserControl but ran into issues when WPF decided to dispose of my UserControl so I would not reattach it without weird hacky work arounds. I am having issues getting some sort of binding working to where i can bind a control to the data and it's template to my data template. I have a ViewModel which looks something like: public class MyViewModel { public DataTemplate SelectedTemplate{ get; set;} public object SelectedViewModel {get; set;} } The selected template and viewmodel are determined somewhere else in the code but are irrelevant to my question. My question is how i can bind to a DataTemplate so that I know how to display the data shown in the SelectedViewModel. The DataTemplate is a DataTemplate created incode which respresents: <DataTemplate DataType="{x:Type vm:MyViewModel}"> <v:MyUserControl /> </DataTemplate> I have tried: <UserControl Template="{Binding Path=SelectedTemplate}" Content="{Binding Path=SelectedViewModel"} /> But UserControl expects a control template and not a data template.

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  • Filtering a Grid of Data in ASP.NET MVC

    This article is the fourth installment in an ongoing series on displaying a grid of data in an ASP.NET MVC application. The previous two articles in this series - Sorting a Grid of Data in ASP.NET MVC and Displaying a Paged Grid of Data in ASP.NET MVC - showed how to sort and page data in a grid. This article explores how to present a filtering interface to the user and then only show those records that conform to the filtering criteria. In particular, the demo we examine in this installment presents an interface with three filtering criteria: the category, minimum price, and whether to omit discontinued products. Using this interface the user can apply one or more of these criteria, allowing a variety of filtered displays. For example, the user could opt to view: all products in the Condiments category; those products in the Confections category that cost $50.00 or more; all products that cost $25.00 or more and are not discontinued; or any other such combination. Like with its predecessors, this article offers step-by-step instructions and includes a complete, working demo available for download at the end of the article. Read on to learn more! Read More >

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  • Technique to have screen independent grid based puzzle with sprite animation

    - by Yan Cheng CHEOK
    Hello all, let's say I have a fixed size grid puzzle game (8 x 10). I will be using sprites animation, when the "pieces" in the puzzle is moving from one grid to another grid. I was wondering, what is the technique to have this game being implemented as screen resolution independent. Here is what I plan to do. 1) The data structure coordinate will be represented using double, with 1.0 as max value. // Puzzle grid of 8 x 10 Environment { double width = 0.8; double height = 1.0; } // Location of Sprite at coordinate (1, 1) Sprite { double posX = 0.1; double posY = 0.1; double width = 0.1; double height = 0.1; } // scale = PYSICAL_SCREEN_SIZE drawBitmap ( sprite_image, sprite_image_rect, new Rect(sprite.posX * Scale, sprite.posY * Scale, (sprite.posX + sprite.width) * Scale, (sprite.posY + sprite.Height) * Scale), paint ); 2) A large size sprite image will be used (128x128). As sprite image shall look fine if we scale from large size down to small size, but not vice versa. Besides the above mentioned technique, is there any other consideration I had missed out?

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  • New EPS: Oracle RAC 11g & Grid Infrastructure Administration

    - by Brandye Barrington
    I'm happy to announce the availability of a brand new Exam Prep Seminar titled Certification Exam Prep Seminar: Oracle RAC 11g and Grid Infrastructure Administration. This new Exam Prep Seminar is available standalone, or through a Certification Value Package, which includes (1) the Seminar, and (2) a certification exam voucher with a free retake. For those of you preparing for the Oracle Certified Expert (OCE) - Oracle Real Application Clusters 11g and Grid Infrastructure certification, this seminar is a great value and and an excellent way to gain valuable insight from one of Oracle University's top Database instructors. This Exam Prep Seminar will accelerate your preparation, make your prep time more efficient and give you insight to the breadth and depth of the certification exam. This type of exam preparation has traditionally only been available at the Oracle OpenWorld conference, but is now available to anyone through this new format. Of course with online video, you can now start, stop, rewind, and review as needed! Also note that because this seminar is in the Oracle Training On Demand format, you can also watch it on your your iPad through Oracle University's new free iPad app. QUICK LINKS Oracle Certified Expert (OCE) - Oracle Real Application Clusters 11g and Grid Infrastructure Oracle RAC 11g & Grid Infrastructure Admin. Certified Expert Certification Value Package

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  • Certain grid lines not rendering as expected

    - by row1
    I am drawing a simple quad (a triangle strip with 4 vertices) as the floor and then drawing an 8x8 grid over top (a collection of vertex pairs for a line list). The vertical grid lines work fine (apart from being very aliased), but some of the horizontal lines do not get rendered. The grid renders fine if I do not draw the quad. foreach (EffectPass pass in _Effect.CurrentTechnique.Passes) { pass.Apply(); CurrentGraphicsDevice.SetVertexBuffer(_VertexFloorBuffer); _Engine.CurrentGraphicsDevice.DrawPrimitives(PrimitiveType.TriangleStrip, 0, 2); //Some of the horizontal lines seems to disappear if we draw the above quad. CurrentGraphicsDevice.SetVertexBuffer(_VertexGridBuffer); CurrentGraphicsDevice.DrawPrimitives(PrimitiveType.LineList, 0, _VertexGridBuffer.VertexCount / 2); } What could be causing these lines to not be rendered? Update: I added the below code after I draw my quad and grid and it started working. But I am not sure why that works as I thought this code was to draw the WPF controls elementRenderer.Render(); spriteBatch.Begin(); spriteBatch.Draw(elementRenderer.Texture, Vector2.Zero, Color.White); spriteBatch.End();

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  • In WPF, Selecting ItemContainerStyle based on data bound content

    - by Bart Roozendaal
    In #WPF you have ItemTemplateSelectors. But, can you also select an ItemContainerStyle based on the datatype of a bound object? I am databinding a scatterview. I want to set some properties of the generated ScatterViewItems based on the object in their DataContext. A mechanism similar to ItemTemplateSelector for styles would be great. Is that at all possible? I am now binding to properties in the objects that I am displaying to get the effect, but that feels like overhead and too complex (and most importantly, something that our XU designers can't do by themselves). This is the XAML that I am using now. Your help is greatly appreciated. <s:ScatterView x:Name="topicsViewer"> <s:ScatterView.ItemTemplateSelector> <local:TopicViewerDataTemplateSelector> <DataTemplate DataType="{x:Type mvc:S7VideoTopic}"> <Grid> <ContentPresenter Content="{Binding MediaElement}" /> <s:SurfaceButton Visibility="{Binding MailToVisible}" x:Name="mailto" Tag="{Binding Titel}" Click="mailto_Click" HorizontalAlignment="Right" VerticalAlignment="Top" Background="Transparent" Width="62" Height="36"> <Image Source="/Resources/MailTo.png" /> </s:SurfaceButton> <StackPanel Orientation="Horizontal" VerticalAlignment="Bottom" HorizontalAlignment="Center" Height="32"> <s:SurfaceButton Tag="{Binding MediaElement}" x:Name="btnPlay" Click="btnPlay_Click"> <Image Source="/Resources/control_play.png" /> </s:SurfaceButton> <s:SurfaceButton Tag="{Binding MediaElement}" x:Name="btnPause" Click="btnPause_Click"> <Image Source="/Resources/control_pause.png" /> </s:SurfaceButton> <s:SurfaceButton Tag="{Binding MediaElement}" x:Name="btnStop" Click="btnStop_Click"> <Image Source="/Resources/control_stop.png" /> </s:SurfaceButton> </StackPanel> </Grid> </DataTemplate> <DataTemplate DataType="{x:Type mvc:S7ImageTopic}"> <Grid> <ContentPresenter Content="{Binding Resource}" /> <s:SurfaceButton Visibility="{Binding MailToVisible}" x:Name="mailto" Tag="{Binding Titel}" Click="mailto_Click" HorizontalAlignment="Right" VerticalAlignment="Top" Background="Transparent" Width="62" Height="36"> <Image Source="/Resources/MailTo.png" /> </s:SurfaceButton> </Grid> </DataTemplate> <DataTemplate DataType="{x:Type local:Kassa}"> <ContentPresenter Content="{Binding}" Width="300" Height="355" /> </DataTemplate> </local:TopicViewerDataTemplateSelector> </s:ScatterView.ItemTemplateSelector> <s:ScatterView.ItemContainerStyle> <Style TargetType="s:ScatterViewItem"> <Setter Property="MinWidth" Value="200" /> <Setter Property="MinHeight" Value="150" /> <Setter Property="MaxWidth" Value="800" /> <Setter Property="MaxHeight" Value="700" /> <Setter Property="Width" Value="{Binding DefaultWidth}" /> <Setter Property="Height" Value="{Binding DefaultHeight}" /> <Setter Property="s:ScatterViewItem.CanMove" Value="{Binding CanMove}" /> <Setter Property="s:ScatterViewItem.CanScale" Value="{Binding CanScale}" /> <Setter Property="s:ScatterViewItem.CanRotate" Value="{Binding CanRotate}" /> <Setter Property="Background" Value="Transparent" /> </Style> </s:ScatterView.ItemContainerStyle> </s:ScatterView> Bart Roozendaal, Sevensteps

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