I have a ObservableCollection<Class1> where Class1 contains x and y positions as properties. The list can be of any size. I have a ViewModel that exposes the collection as a property. In my view, I want to generate a list of elements based on the collection and then set their x and y positions based on the Class1 Object's properties. Ho...
After a substantial refactoring complete with 100% passing tests, it turns out that firing up the UI shows it is now impossible to select an item in the list. What is happening is that the selected item is called twice - the first time with the correct item that was selected. But then it is called again with a value of null. Looking thr...
Can someone explain why data binding against a nullable property in an ADO Data Entity Model does not seem to work. I have a decimal field named "Weight" that when it is set to allow nulls in the database, I can not seem to change the value on a windows form. However if I turn off the allow nulls in the database and update the model, t...
I've been doing some work in WPF, and I for the most part have my bindings working, but I need a scope clarification here. I've run into some seemingly simple operations that require silly binding workarounds and I believe a lot of it has to do with scope. Example #1 - Out of visual tree, binding to parent. <ComboBox x:Name="Combo1" It...
I have a databound WPF ListBox with a custom itemtemplate -> datatemplate. Part of that template is also a ListBox. On certain event I'd like to loop through all textboxes in the ListBox and retreive their values. Is this possible? ...
I have a WPF list view that is bound to a list of objects. One of the items to be displayed is a calculated property (read-only, returns a string) that takes a small amount of time to calculate. When the window initially loads (or anytime the UI is updated with a Notify event) the UI will hang as this data binding occurs. What I was w...
Hi, I want to bind a List to a WPF combobox in xaml. Wondering what is the simplest way to do it. (The reason behind is I want to maintain the years as integer rather than doing the type conversion from string to int. I get a list of years(2009,2010,2011) from the DB and want to be able to bind this to the combo and get the selected ...
Hello, I recently asked this question on here and got the answer. However I'm now trying to apply the same logic on a DataGridView which is bound to a BindingList< T > of Curriculum objects. The Curriculum class has a property of type Year. I'm trying to use a ComboBoxColumn to update the reference the curriculum object has of years. T...
I'd like to create a slide-down animation for an Grid element in my WPF (.net 4.0) application. I assumed that I could do the following: create a visual state (closed, renderTranslate.y=-ActualHeight, solved via Binding with converter) create a visual state (open, renderTranslate.y=0) create a container to clip the animation use the de...
I'm having a problem with my combo box and trying to get the text that is displayed in the box. I have the ItemsSource bound to a SqlDataReader, and I'm trying to populate another combo box based on what item is selected in the first combo box. In the first combobox's selection changed event, I'm running a query based on what's selected...
Context I'm putting together a templated, databound control. Presently it works with the following syntax... <cc:ItemChooserControl ID="ItemChooser" runat="server"> <TitleTemplate> <h4><%# DataBinder.Eval(Container.DataItem, "DisplayName") %></h4> </TitleTemplate> </cc:ItemChooserControl> Problem What I would like t...
I was wondering why this doesn't work: Is it possible to declaratively bind to an Object's property. <asp:DropDownList id="ddl" runat="server" DataValueField="Key" DataTextField="Value.DisplayName" /> Code Behind var d = new Dictionary<int, MailAddress>(); d.Add(0,new MailAddress("[email protected]", "Mr. Foo"); d.Add(1...
I'm new to c# and I'm looking for a way to bind a property of an object of my own to the value of a textbox in a regular form (reset the property of the object everytime the value of the input changes). I have read some information and it seems that this can be done only for database objects. Can you give me additional information. ...
I'm trying to bind a collection to a ListBox using only XAML. It kind of works, but it's only displaying MyProject.mainItem (which is the object type), instead of the actual values. In the class that is assigned as the DataContext, I have this: ItemCatalog.Add(new mainItem { Ref = "555555", ItemName = "First Item" }); In the XAML on ...
Hi, I'm trying to create a pivot of a translation table. Basically the table is like that : SystemText(Category, Name, LanguageCode, Text) I have created a model object which has these fields as properties and I'm using NHibernate to get the data from the database. Now what I want to display is a grid to edit the translations that wi...
I have a combo box defined as such <ComboBox Name="RoomDropDown" Visibility="{Binding Path=RoomDropDownVisible,Mode=OneWay,Converter={StaticResource BoolVisibilityConvertor}}" ItemsSource="{Binding Path=RoomList,Mode=OneWay}" DisplayMemberPath="display" SelectedValuePath="display" SelectedValue="{Binding Path=R...
It is known that the ListView control can't display both an EmptyDataTemplate and a InsertItemTemplate at the same time. For my design style I need to be able to show both. I want to be able to show that no data exist and at the same time show a form to add new data. I've already implemented various solutions, such as putting a PlaceHo...
I have an ObjectDataSource on a page that is producing the error "Object does not match target type" when its Insert method is invoked. From Googling this message, I believe this the message is deceptive and I'm actually getting a null reference error on the object that the ObjectDataSource is trying to invoke the method on, but I'm darn...
I know this question has been asked many times in different ways in many websites and also in StackOverFlow but all the answers I found are not helping me ot to be precise I am not able to understand them and implement in my application. So I thought of putting some code from my application so that you people can help me better. Problem...
I have a combo box defined as such <ComboBox Name="RoomDropDown" Visibility="{Binding Path=RoomDropDownVisible,Mode=OneWay,Converter={StaticResource BoolVisibilityConvertor}}" ItemsSource="{Binding Path=RoomList,Mode=OneWay}" DisplayMemberPath="display" SelectedValuePath="display" SelectedValue="{Binding Path=R...