selecteditem

问题 I'm working on this website where users can create their own bundles. Basically they have a list of courses and they can pick 5 and create a bundle. The approach I'm taking is a dropdown list of all courses that then gets cloned on click. What I'd like to do is disable any previously selected items on the next cloned list. Is this possible? Here's my code: http://jsfiddle.net/Y4fLM/ Thanks a lot! 回答1: You can try this one as well http://jsfiddle.net/Y4fLM/3/ As with your question it seems may

问题 I have a treeview with several items in it. How do I force the treeView to select a specific item ? Everytime I try to use any of the "Selected..." property, I get the error that it is read-only and cannot be set either in code or in XAML. Regards, 回答1: You need to create a Selected property on your tree item's ViewModel, and bind to it. Here is an article that explains how to do it. Edit. Actually that uses a different way. The article I was thinking of was this one 来源： https://stackoverflow

问题 In a previous question I described a problem where I couldn't figure out how to remember and set the SelectedItem on a ListView . The problem is, when I set the SelectedItem from my ViewModel, the ListView does not show the SelectedItem as highlighted. The question remained unanswered, so I tried to reproduce the problem in a small example. To my big surprise, I just learned that the problem is solved when I create a copy of the original selected item (which I stored in my ViewModel), and set

问题 So I've managed to create a context menu bar and it selects the colour of an item based on if it is checked or not. It works fine for only 2 problems: When the items are checked...further down in the list other items become checked as well, when they were never even selected (I am assuming it has to do with listview recycling on the getChildPosition)? Also when my context menu bar closes...the highlighting stays and am not really sure how to remove it? The solution: Remove the highlighting

问题 I have a combo box with an item source set as a collection of 'Category'. The SelectedValuePath is the CategoryID property. I have a user setting 'DefaultCategory' that is an integer of which should set the CategoryID. I want the combo box to have a selection of the DefaultCategory user setting. xmlns:my="clr-namespace:MyApp" <ComboBox x:Name="cmbCategory" DisplayMemberPath="Category" SelectedValuePath="CategoryID" SelectedValue="{Binding Source={x:Static my:MySettings.Default}, Path

问题 I am going through the Sams book "Teach Yourself WPF in 24 Hours". At one point the authors show how you can bind a ListBox's selected-item value to a property. I get that, it's pretty straightforward. But when I try to create my own ListBox control with my own ListBoxItems, I can't seem to get it to work. The ListBox that works uses a system collection as its ItemsSource property: <ListBox x:Name="FontList" DockPanel.Dock="Left" ItemsSource="{x:Static Fonts.SystemFontFamilies}" Width="160" /

问题 I have UserControl , lets call it as CustomDataGrid , that contains DataGrid . Remained content doesn't matter. SelectedItem property of DataGrid must be SelectedItem property of CustomDataGrid . And I wanna be able to use Binding with this property, cause I use MVVM pattern. So I have to declare SelectedItem as DependencyProperty in CustomDataGrid . But I have no ideas haw can I make it properly... This is how DepedencyProperty -s is declared usually: public static readonly

问题 using primeNg dropdown component, I'm trying to initialized the dropdown with initial value with no success, I'm using reactive approach. I checked the primeNg documentation and demos - almost all the examples there are using template driven, I would like to have the same with model driven. I'm able to render the dropdown with the values in the list but the selected item is not the one I declared in the form, instead it's the first item in the list. my code: template <div [formGroup]=

问题 I hope someone is willing to help me out here. I`m pretty new to MVVM, an after reading manny post and examples i still cant figure this out. i have EF database filled with items and calculations that belong to each Item. i`m showing the items and calculations using a treeview and HierarchicalDataTemplate. when i click on a treeview item, i want to bind the text of a label to be set at public string totaalPrijs but i just cant figure out how to do that! this is how my CalculationViewModel

问题 I have a GridView with a bunch of icons and I need to select one. And by select I mean: I need the drawable id to store into a database (so I can access it later) I need to draw some kind of visual cue on the grid to let the user know which icon is currently selected I found this: http://groups.google.com/group/android-developers/browse_thread/thread/f08a58167dbaa8c8 So I guess setSelection is out of the picture and I can't use it to select the icon itself nor draw the visual cue. I know the