When implementing the ViewModel in a Model-View-ViewModel architecture WPF application there seem to be two major choices how to make it databindable. I have seen implementations that use DependencyProperty for properties the View is going to bind against and I have seen the ViewModel implementing INotifyPropertyChanged instead. My question is when should I prefer one … Read more
I have a TextBlock in WPF. I write many lines to it, far exceeding its vertical height. I expected a vertical scroll bar to appear automatically when that happens, but it didn’t. I tried to look for a scroll bar property in the Properties pane, but could not find one. How can I make vertical … Read more
I’m looking to accept digits and the decimal point, but no sign. I’ve looked at samples using the NumericUpDown control for Windows Forms, and this sample of a NumericUpDown custom control from Microsoft. But so far it seems like NumericUpDown (supported by WPF or not) is not going to provide the functionality that I want. … Read more
Is there a standard message box in WPF, like WinForms’ System.Windows.Forms.MessageBox.Show(), or should I use the WinForms message box? 9 Answers 9
What is the difference betweeen the following: SelectedItem SelectedValue SelectedValuePath All these dependency properties are defined in Selector class. I often confuse SelectedItem with SelectedValue , and SelectedValue with SelectedValuePath. I would like to know the difference between them, and also when do we use them, especially SelectedValue and SelectedValuePath. Please explain their use with … Read more
I simply want flowing text on the left, and a help box on the right. The help box should extend all the way to the bottom. If you take out the outer StackPanel below it works great. But for reasons of layout (I’m inserting UserControls dynamically) I need to have the wrapping StackPanel. How do … Read more
I am developing an app for sending some feedback. Basically I’m trying to make a TextBox for comments, but I’m used to the WinForms MultiLine=true. I’ve set MinLines to 3, which is getting there, but preferably I’d like it if the user is able to type wherever in this block – like press enter and … Read more
My code is as below public CountryStandards() { InitializeComponent(); try { FillPageControls(); } catch (Exception ex) { MessageBox.Show(ex.Message, “Country Standards”, MessageBoxButton.OK, MessageBoxImage.Error); } } /// <summary> /// Fills the page controls. /// </summary> private void FillPageControls() { popUpProgressBar.IsOpen = true; lblProgress.Content = “Loading. Please wait…”; progress.IsIndeterminate = true; worker = new BackgroundWorker(); worker.DoWork += new … Read more
What I have is an object that has an IsReadOnly property. If this property is true, I would like to set the IsEnabled property on a Button, ( for example ), to false. I would like to believe that I can do it as easily as IsEnabled=”{Binding Path=!IsReadOnly}” but that doesn’t fly with WPF. Am … Read more
For a WPF application which will need 10 – 20 small icons and images for illustrative purposes, is storing these in the assembly as embedded resources the right way to go? If so, how do I specify in XAML that an Image control should load the image from an embedded resource? 10 Answers 10
