binding

问题 I have an svg like below <g> <path d="M150 0 L75 200 L225 200 Z" id='path1'/> <path d="M151 0 L75 200 L225 100 Z" id='path2'/> <path d="M152 0 L75 200 L225 300 Z" id='path3'/> <path d="M153 0 L75 200 L225 400 Z" id='path4'/> </g> And I have a data.json like { [ "path2", "22218", "26627", "29101" ], [ "path4", "218", "207", "160" ] [ "path3", "22218", "26627", "29101" ], [ "path1", "218", "207", "160" ] } I am confused as how to bind the data based on the key.I am assuming that I can use the

问题 I would like to bind my ListViewItem's ToolTip to its ContentTemplate's TextBlock's ToolTip. I tried the following but it didnt work: <ListView ItemsSource="{Binding DoestMatter}" > <ListView.ItemContainerStyle> <Style TargetType="{x:Type ListViewItem}"> <Setter Property="ToolTip" Value="{Binding ElementName=Title, Path=ToolTip}"/> <Setter Property="ContentTemplate"> <Setter.Value> <DataTemplate> <TextBlock x:Name="Title" Text="{Binding Title}" ToolTip="Test"/> </DataTemplate> </Setter.Value>

问题 For the attached example below, how can i properly save my updated model? I am afraid of some crazy stuff like custom model binding,etc. and I want to solve this with elegance. Model public class Artist { public int ArtistId { get; set; } public string ArtistName { get; set; } public virtual ICollection<Album> ArtistAlbums { get; set; } } public class Album { public int AlbumId { get; set; } public string AlbumName { get; set; } } Snippet from Create View <input type="text" name="ArtistAlbums

问题 I want to bind the data coming from JSON to ListView in xamarin.forms. i have made the call and i have parsed the data from JSON. Now i am not able to understand the best way to bind the data in the xamarin.forms that is. JSON: [{"Product":"XXX","Origins":[{"Origin":"ORI1","Details":[{"Seller":"Name","Seller_Rate":"256","Saller_QTY":"20","Buyer":"Name","Buyer_Rate":"256","Buyer_QTY":"20"},{"Seller":"Name","Seller_Rate":"256","Saller_QTY":"20","Buyer":"Name","Buyer_Rate":"256","Buyer_QTY":"20"

问题 All, I have some test code that works with some test data defined as private ObservableCollection<TestClass> _testData = new ObservableCollection<TestClass>(); public ObservableCollection<TestClass> TestData { get { return _testData; } set { _testData = value; } } and is bound at design-time via <DataGrid x:Name="dataGrid" ItemsSource="{Binding TestData}".../> I have created a DataGrid which gets populated at run-time via dataGrid.ItemsSource = BuildDataGridColumns(cultureDict).Tables[0]

问题 How do we control what happens if one of the parent objects in the property path is null? For example: <Button Command="{Binding ActiveDrawing.PrintCommand}" /> What if ActiveDrawing is null? I want this button to be disabled in that case, but WPF keeps it enabled. I have tried setting FallBackValue to null, like this: <Button Command="{Binding ActiveDrawing.PrintCommand, FallbackValue={x:Null}}" /> but it doesn't make a difference. The button keeps enabled. N.B. Setting TargetNullValue to {x

问题 If I had a label on a view that I wanted to have the width equal to the width of two columns in one of my grids on the same view, how would I set up the binding without using a converter? Should I use properties to preform my calculation and store a value? It is my intention that if the view's grid size changes then this label's size will also change to match the new width of the two columns. And where should I put this logic? I am trying to follow MVVM pattern but I see that a lot of threads

问题 Ok. I am not sure how to even ask the question, which is the sign I must be missing something. The best I can do is: "Is there a way to instantiate an object manually and still use injection within that object?" Concretely, say I have: class A { public A(MyObject1 obj1, MyObject2 obj2, ..., MyObjectn objn) { ... } } I want to wire all of these objects except MyObjectn. As far as I know, if I use @Autowired in front of that constructor above, then I should only instantiate that object as

问题 My data model has a property of the enumeration type. I wonder if there is way to place dynamically a user control based on the value of the enumeration type? I am currently investigating in the following direction: <Grid Name ="AdjustmentsArea" DockPanel.Dock ="Right" MinWidth ="100" Visibility ="Collapsed" > <ContentControl DataContext ="{Binding AjustmentView}"> <Style TargetType ="model:AjustmentViews"> <Style.Triggers> <DataTrigger Binding ="{Binding}" Value ="Settings"> /// is it

问题 how do i bind a property declared in a viewmodel to take value from another viewModel? let me explain i have 2 ViewModels (Implements INotifyPropertyChanged) and 1 View InvoiceView ( just my invoice design no matter if is a user control or window or a dataTemplate) InvoiceViewModel NoteListingVM (this viewmodel has a property let's name it TableRefID) In the ViewInvoice i have an expander with it's dataContext set to (NoteListingVM) to show some notes that are linked with the specific