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  • WPF Listview- What would be the best way to display data from different ObservableCollections based

    - by highone
    I have three ObservableCollections: CharacterCollection, LocationCollection, and ItemCollection. They are all collections of objects; CharacterCollection is a collection of Character Objects. I need to display, in the listview, information from the collection determined by the user clicking on a button. I would prefer to use databinding, but I don't see a clear cut way to do that with multiple collections containing different types of objects. What would be the best way to easily switch between collections?

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  • How to access Main Form Public Property WPF

    - by Asim Sajjad
    I have a user control from where I have to call the property of the window which contain the user control how can I access that property. Suppose I have Title Property in my window and I want to access Title property of the window from the user control. Any idea Thanks in advance

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  • WPF - DataTemplate to show only one hierarchical level in recursive data

    - by Paull
    Hi all, I am using a tree to display my data: persons grouped by their teams. In my model a team can contain another team, so the recursion. I want do display details about the selected node of the tree using a contentpresenter. If the selection is a person, everything is fine: I can show the person name or datails without problem using a simple datatemplate. If the selection is a team I would like to display the team name followed by a list of member names. If one of these members is another team I would like to display just the team name, without recursion... My code here is wrong because it displays data in a recursive way, what is the right way of doing it? Thanks in advance for any help! best regards, Paolo <ContentPresenter Content="{Binding Path=SelectedItem, ElementName=PeopleTree}" > <ContentPresenter.Resources> <DataTemplate DataType="{x:Type my:PersonViewModel}"> <TextBlock Text="{Binding PersonName}"/> </DataTemplate> <DataTemplate DataType="{x:Type my:TeamViewModel}"> <StackPanel> <TextBlock Text="{Binding TeamName}" /> <ListBox ItemsSource="{Binding Members}" /> </StackPanel> </DataTemplate> </ContentPresenter.Resources> </ContentPresenter>

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  • Implement master detail in one datagrid in wpf

    - by Archie
    Hello, I have classes as following: public class Property { public string PropertyName { get; set; } public int SumSubPropertValue; private List<SubProperty> propertyList; public void CalculateSumSubPropertValue { // implementation} } public class SubProperty { public string SubPropertyName { get; set; } public int SubPropertyValue { get; set; } } I have grouped the rows in datagrid on PropertyName . When the user clicks on PropertyName expnader the columns should display SubPropertyName and SubPropertyValue. Also SumSubPropertValue should appear in front of PropertyName in the expander header. My Datagrid is bound to a CollectionViewSource as follows: CollectionViewSource view = new CollectionViewSource(); view.Source = infoList; view.GroupDescriptions.Add(new PropertyGroupDescription("PropertyName")); Where infoList is ObservableCollection<Property>. My datagrid colmns look like <my:DataGrid.Columns> <my:DataGridTextColumn Header="SubPropertyName" Binding="{Binding SubPropertName}" Width="*"/> <my:DataGridTextColumn Header="SubPropertyValue" Binding="{Binding SubPropertyValue}" Width="*"/> </my:DataGrid.Columns> Can someone help me with it?

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  • WPF Grid Column MaxWidth not enforced

    - by Trevor Hartman
    This problem stems from not being able to get my TextBlock to wrap. Basically as a last-ditch attempt I am setting MaxWidth on my container grid's columns. I was surprised to find that my child label and textbox still do whatever they want (bad children, BAD) and are not limited by my grid column's MaxWidth="200". What I'm really trying to do is let my TextBlock fill available width and wrap if necessary. So far after trying many variations of HorizontalAlignment="Stretch" on every known parent in the universe, nothing works, except setting an explicit MaxWidth="400" or whatever number on the TextBlock. This is not good because I need the TextBlock to fill available width, not be limited by some fixed number. Thanks! <ItemsControl> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <StackPanel /> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> <ItemsControl.ItemTemplate> <DataTemplate> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition MaxWidth="200" SharedSizeGroup="A" /> <ColumnDefinition MaxWidth="200" SharedSizeGroup="B" /> </Grid.ColumnDefinitions> <Label VerticalAlignment="Top" Margin="0 5 0 0" Grid.Column="0" Style="{StaticResource LabelStyle}" Width="Auto" Content="{Binding Value.Summary}" /> <TextBlock Grid.Column="1" Margin="5,8,5,8" FontWeight="Normal" Background="AliceBlue" Foreground="Black" Text="{Binding Value.Description}" HorizontalAlignment="Stretch" TextWrapping="Wrap" Height="Auto" /> </Grid> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl>

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  • WPF Style: how to change GradientStop Color in Trigger

    - by Nike
    I have a Button Style: <Style x:Key="ButtonStyle1" TargetType="{x:Type Button}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Button}"> <Grid> <Path x:Name="path1" ... Data="...some data..."> <Path.Fill> <LinearGradientBrush EndPoint="0.5,-0.3" StartPoint="0.5,0.8"> <GradientStop x:Name="gs1" Color="Green" Offset="0.44"/> <GradientStop Color="Black" Offset="0.727"/> </LinearGradientBrush> </Path.Fill> </Path> <ContentPresenter ...properties... /> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter TargetName="???" Property="Color" Value="Green"></Setter> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> I want to change the Color of GradientStop with x:Name="gs1" when mouse is over button, so I use Trigger IsMouseOver. How can i get an access to Color Property in Trigger? I tried TargetName="path1.gs1" but it doesn't work. Any idea?

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  • WPF Accessing Items inside Listbox which has a UserControl as ItemTemplate

    - by Turker
    I have Window that has a ListBox ListBox(MyListBox) has a DataTable for its DataContext ListBox's ItemSource is : {Binding} Listbox has a UserControl(MyUserControl) as DataTemplate UserControl has RadioButtons and TextBoxes (At first They're filled with values from DataTable and then user can change them) Window has one Submit Button What I want to do is, when user clicks the submit button For each ListBox Item, get the values form UserControl's TextBoxes and RadioButtons. I was using that method for this job : foreach(var element in MyListBox.Items) { var border = MyListBox.ItemContainerGenerator.ContainerFromItem(element)as FrameworkElement; MyUserControl currentControl = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(myBorder,0) as Border,0)as ContentPresenter,0)as MyUserControl; //And use currentControl } I realised nothing when using 3-5 items in Listbox. But when I used much more items, I saw that "var border" gets "null" after some elements looped in foreach function. I found the reason here : http://stackoverflow.com/questions/1675926/listview-itemcontainergenerator-containerfromitemitem-return-null-after-20-item So what can I do now? I want to access all items and get their values sitting on user controls. Thanks

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  • WPF tooltip in MS datagrid

    - by klawusel
    Hi I show my business objects in a MS datagrid, containing "country", "city", "street", for example. I can set a tooltip for each column showing its content using a style, so I get the "country" as tooltip when hooverinmg over the "country" column and so on. But I did not succeed 1) to show the content of "country" when hoovering over "city" 2) to show the content of some other property (not even displayed in the datagrid) when hoovering the datagrid Any clues? Regards

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  • Deleting an Image that has been used by a WPF control

    - by Peter
    Hi, I would like to bind an Image to some kind of control an delete it later on. path = @"c:\somePath\somePic.jpg" FileInfo fi = new FileInfo(path); Uri uri = new Uri(fi.FullName, UriKind.Absolute); var img = new System.Windows.Controls.Image(); img.Source = new BitmapImage(uri); Now after this code I would like to delete the file : fi.Delete(); But I cannot do that since the image is being used now. Between code fragment 1 en 2 what can I do to release it? Thanks

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  • Keeping WPF grids from getting out of parent bounds

    - by Jonathan Perry
    In my UI, I have a big grid with two columns and one row. in the right column, I have a grid with three rows where in the top row I have a user control, and in the two bottom rows I have two Expander objects, each containing an ItemsControl with a list that gets populated in runtime. Sometimes, that list gets really long and "spills" from the screen towards the bottom. What I want to do is to allow the user to see both expanders, be able to expand or collapse them while keeping them both in sight. I tried wrapping them in WrapPanels or StackPanel but to no avail. Here's some code to help explain my problem: <Grid Grid.Row="1" x:Name="grid1"> <Grid.RowDefinitions> <RowDefinition Height="*" /> <RowDefinition Height="*" /> </Grid.RowDefinitions> <Expander Grid.Row="0" Header="Expander 1" x:Name="expander1" FontSize="14" IsExpanded="True"> <Expander.Background> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FFC4C4C4" Offset="0" /> <GradientStop Color="White" Offset="1" /> </LinearGradientBrush> </Expander.Background> <ContentPresenter Content="{Binding ViewModel.OpenAlerts, ElementName=m_viewControl}" ClipToBounds="True"/> </Expander> <Expander Grid.Row="1" x:Name="expander2" Header="Expander 2" FontSize="14" IsExpanded="True"> <Expander.Background> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FFC4C4C4" Offset="0" /> <GradientStop Color="White" Offset="1" /> </LinearGradientBrush> </Expander.Background> <ContentPresenter Content="{Binding ViewModel.ClosedAlerts, ElementName=m_viewControl}" ClipToBounds="True"/> </Expander> </Grid> Any assistance or tips will be highly appreciated! Thanks, John.

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  • WPF, ShowGridLines equivalent for wrap panel

    - by user275587
    I need to display a 1 pixel wide border around all wrap panel cells, kinda like excel grid. Unfortunately the wrap panel does not implement the grid ShowGridLines property. I can't put a border inside every cell because adjacent cells will have a 2 pixel border instead of 1 pixel. Since the wrap panel arranges it's layout dynamically and does not expose it's properties I can't evaluate the correct value for a border inside a cell. Any workaround possible?

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  • WPF Validation on two properties

    - by morsanu
    I have a user control that contains a border somewhere in it. I am able to edit both the User Control Width and the Border Width from binding to two textboxes. I need to include validation when I create the binding in code so that the Border Width can't be higher than the User Control Width.

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  • Compare GetNextInsertionPosition and GetNextContextPosition in WPF

    - by paradisonoir
    As I enter a character in my RichTextBox, I want to get the next character from the its TextRange. So here is how I do it: TextPointer ptr1= RichTextBox.CaretPosition; char nextChar = GetNextChar(); while (char.IsWhiteSpace(nextChar)) { ptr1= ptr1.GetNextInsertionPosition(LogicalDirection.Forward); nextChar = GetCharacterAt(Ptr1); } then I get the ptr1 of the next character and from the TextPointer, I get the TextRange, and do my changes. So here is the problem? when the next word is spelled correctly, I have no problem, but if it's not spelled properly then ptr1 would not point to the first character of the next word (the second character), and if I use GetNextContextPosition(LogicalDirection.Forward) it would give me the first letter of the next word if it's misspelled. So depending on the spelling only one of them works? I was just wondering if you have any idea about this problem? Is there anything wrong I am doing here?

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  • WPF: How to get Binding.Converter

    - by Nike
    I create DataGrid Columns with Binding (where i is a Int value): dataGrid.Columns.Add(new DataGridTextColumn { Header = i.ToString(), Binding = CreateBinding(i), }); private Binding CreateBinding(int num) { Binding bind = new Binding(string.Format("[{0}]", num)); bind.Converter = new CellValueConverter(); return bind; } In the CreateBinding method I have an access to bind.Converter property. I need to call Converter.Convert() method in some handler, but there is no Converter property when I try to access it: (dataGrid.Columns[clm] as DataGridTextColumn).Binding."no Converter property!" How can I get my CellValueConverter which was created for particular Column?

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  • Bind the value of a parameter in an ObjectDataProvider in WPF

    - by Andrei Rinea
    I would like to be able to be doing this : <ObjectDataProvider x:Key="dataProvider" ObjectInstance="uiRoot:App.Current.Controller" MethodName="GetMyViewModel"> <ObjectDataProvider.MethodParameters> <system:Int32>{Binding Id}</system:Int32> </ObjectDataProvider.MethodParameters> </ObjectDataProvider> The emphasis being on <system:Int32>{Binding Id}</system:Int32> I can't get around this. Any ideas? :(

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  • Conditionals in WPF.

    - by Carlos
    I have the following question: I have a Boolean variable in a configuration file. If it is true I want a property in textbox control to be setup according to the value of that variable. Try the solution above but it does not work. What am I doing wrong? This is a fragment code: bool isKeyboardAvtive = true; //read from configuration file .... .....

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  • WPF: change DataTemples according to Value

    - by Kave
    I have a class called Cell with two properties. One is called Value of type int? And the other is called Candidates of type ObservableCollection during the initialization I am utilizing a DataTemplateSelector to choose between two datatemplates for two different scenarios. If the Value property has a value then template A should be used to present the Cell class. However if the Value property is null Then template B should be used to present the Cell class. While this works perfectly fine during the initialization however during the runtime the templates don't change any more when the value of the Value property actually changes. Is the approach of using DataTemplateSelector the wrong approach to change DataTemplates dynamically? What would you recommend I should do? Many thanks,

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  • How to Focus on ListviewItem in WPF?

    - by Prashant
    I have ListBox in my application with Ten items, user can see five items at time. Sometimes I'm selecting items from code and setting focus. Selecting an item and focusing work perfectly when items are visible on Form, but for other non-visible items, I'm unable to set the focus (NOTE: after selecting it is visible to user). Can anyone help me please?

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  • wpf error template - red box still visible on collapse of an expander

    - by Andy Clarke
    Hi, I'm doing some validation on the DataSource of TextBox that's within an Expander and have found that once a validation error has been triggered, if I collapse the Expander, the red box stays where the TextBox would have been. <Expander Header="Blah Blah Blah"> <TextBox Name="TextBox" Validation.ErrorTemplate="{DynamicResource TextBoxErrorTemplate}" Text="{Binding Path=Blah, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" /> </Expander> I've tried to get round this by binding the visibility of the Error Template to the Expander, however I think there's something wrong with the binding. <local:NotVisibleConverter x:Key="NotVisibleConverter" /> <ControlTemplate x:Key="TextBoxErrorTemplate"> <DockPanel> <Border BorderBrush="Red" BorderThickness="2" Visibility="{Binding Path=IsExpanded, Converter={StaticResource NotVisibleConverter}, RelativeSource={RelativeSource AncestorType=Expander}}" > <AdornedElementPlaceholder Name="MyAdorner" /> </Border> </DockPanel> <ControlTemplate.Triggers> <Trigger Property="Validation.HasError" Value="true"> <Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Self}, Path=(Validation.Errors)[0].ErrorContent}"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> I guess I've gone wrong with my binding, can someone put me back on track please? Alternatively does anyone know another solution to the ErrorTemplate still being visible on the collapse of an Expander?

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  • Saving a screenshot of a window using C#, WPF, and DWM

    - by Evan
    This is a follow up question to this question The solution to the above uses DWM to display a thumbnail of an active window. If I understand correctly, it works by letting you specify the window handle of the application you want to view and then having you provide a window handle and a location on that window where windows should draw the contents of the target Window. Is there a way to render the window screen shot directly to BitmapImage or Image instead of directly drawing it somewhere in your window? (Basically to just grab a screen shot of the window - even if it's covered by another window - with out using an updating thumbnail.) Thanks for you help!

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  • Get the caret position when losing focus in WPF

    - by DrLazer
    I have two textbox's. I have an event setup for the "onLostFocus" of the textbox's. If i finish typing a word into both boxes one after the other all is well. At the point where i click back on the first textbox i want to click halfway through the word (perfectly resonable thing for a user to do). When the onLostFocus event fires here is my code : void tbox_LostFocus(object sender, RoutedEventArgs e) { IInputElement focusedelement = FocusManager.GetFocusedElement(this); if (focusedelement is TextBox) { TextBox focusedTextBox = focusedelement as TextBox; int focusIndex = m_commandsStacker.Children.IndexOf(focusedTextBox); int caretIndex = focusedTextBox.CaretIndex; The caret index is 0. At that point I refresh the whole form and set parameters and all other kinds of whizzery, storing the texbox index and caret position to put everything back the same. Why does it return 0 and not the position where the caret should be halfway between the word?

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  • Problem with focus in WPF

    - by Maurizio Reginelli
    I have an application with a WindowsFormHost, which contains an user control, and a DataGrid. When I hold down the left button on the user control, if the selection on the DataGrid changes (via data-binded property), I lose the focus. How can I solve that problem? Thank you.

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