observablecollection

问题 I have a class called IssuesView which implements INotifyPropertyChanged . This class holds an ObservableCollection<Issue> and exposes it as a DependencyProperty called Issues for consumption by Bindings . It is defined as below - public class IssuesView : DependencyObject, INotifyPropertyChanged { public Issues Issues { get { return (Issues)GetValue(IssuesProperty); } set { SetValue(IssuesProperty, value); if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(

问题 I have a collection that is binded to my Listview. I have provided options to user to "move up" "move down" the selected item in the list view. I have binded the selected item of the listview to my viewmodel, hence I get the item in the collection on which user want to do the operation. I have attached "move up" "move down" commands in my viewmodel. I want what is the best way to move up and down in the collection in the collection which is reflected in the list view. For example If the

问题 I have created a databound datagrid in WPF: 'ActionResults', when I run the application it shows the contents of the database table. The I.T dept. are going to manually update the 'ActionResult' table in SQL server management studio. If any changes are made to the table, they will display in the datagrid only after I restart the application. I would like to add an 'Update' button which will re-fresh the datagrid, displaying any changes made to the table. I was previously trying to do a hack

问题 I created a wrapper to extend an ObservableCollection<T> [Serializable] public abstract class ModelCollection<TModel> : ModelCollectionBase, IList<TModel>, INotifyCollectionChanged, INotifyPropertyChanged where TModel : ModelBase<TModel> { private ObservableCollection<TModel> wrappedCollection = new ObservableCollection<TModel>(); // wrapper implementation goes here } I thought it was working fine until I attempted to bind items from a list to a DataGrid. <DataGrid ItemsSource="{Binding

问题 This question already has answers here : DataTable to observable collection (2 answers) Closed 5 years ago . I would like convert DataTable in ObservableCollection without having a specific class in my solution. (All others solution in stackoverflow.com is with specific class.) The reason is that the DataTable represent a Stored Procedure Result, and in the future I would like change the Stored Procedure result without any change in the application. I can't bind directly my DataBale because I

问题 This question already has answers here : DataTable to observable collection (2 answers) Closed 5 years ago . I would like convert DataTable in ObservableCollection without having a specific class in my solution. (All others solution in stackoverflow.com is with specific class.) The reason is that the DataTable represent a Stored Procedure Result, and in the future I would like change the Stored Procedure result without any change in the application. I can't bind directly my DataBale because I

问题 If I have a DAL created by SubSonic 2.2, how do I convert the Collections created by it to WPF ObservableCollections in code (pref.VB.NET) to be consumed by WPF? 回答1: Sorry !VB: [Test] public void Exec_Testing() { ProductCollection products = DB.Select().From("Products") .Where("categoryID").IsEqualTo(5) .And("productid").IsGreaterThan(50) .ExecuteAsCollection<ProductCollection>(); Assert.IsTrue(products.Count == 77); ObservableCollection<Product> obsProducts = new ObservableCollection

问题 I know this may be a duplicate but no solution works for me. So I have a class Technik which has these properties: public class Technik { public bool checkedTe { get; set; } public int TechnikID { get; set; } public string anlagengruppe { get; set; } public string techniktyp { get; set; } public string anlage { get; set; } public string bemerkung { get; set; } } Now I have a DataTable with 216 rows and each row is getting into a Technik object that is added into my ObservableCollection

问题 I am learning these days Entity Framework 5. I developing WPF application which based on MVVM and PRISM. In order to get property changed notifications I am using ObservableCollection for keep my data. I have problem when I use linq to entity projection and I am not sure what is the best solution for it. As you know, when you execute projection through linq to entity you get anonymous type that no one know out the scope of the method. I searched how to make this query strongly typed. I seen

问题 I have a WPF ListBox control which displays items of an RSS feed. I occasionally check the source of the RSS feed for new items. Once I detect a new item I add it to the observable collection which immediately adds the new item to the ListBox display. Is there a way to 'slide in' the new item from the top, pushing down the existing items? How would I achieve such an effect? Can it be done with a ListBox, or do I need to resort to my own container, such as a StackPanel and animate for example