November 2011
4 posts
6 tags
Dynamic View Model
When doing MVVM I find that much of the time putting together the view model is spent creating properties that look like the following:
private string _userName;
public string UserName
{
get { return _userName; }
set
{
if (_userName != value)
{
_userName = value;
RaisePropertyChanged("UserName");
}
}
}
Especially while just banging...
7 tags
Key Input Text Box
On a recent project I had the need to allow the user to input a key stroke. After a quick Google search, I decided to roll my own. The following is the result.
First the boring stuff. Three dependency properties to hold the values.
public class KeyInputTextBox : TextBox
{
public static readonly DependencyProperty KeyProperty =
DependencyProperty.Register("Key", typeof(Key),...
5 tags
RemoveWhere extension method
Often we need to iterate over a collection and remove items that meat a given criteria. Sure List<T> has RemoveAll, but what about the cases where you do not have a List<T>?
Typically this results in code like the following:
var collection = new ObservableCollection<int> { 7, 2, 3, 4, 6, 5 };
var toRemove = collection.Where(x => x % 2 == 0).ToList();
foreach (var item in...
7 tags
MVVM Popups
Recently I was faced with an interesting problem of how to properly display a popup and still follow the MVVM pattern. After a lot of thought, the following is the solution that I have finally landed on.
First of all the main window for the application:
<Window x:Class="MVVMPopup.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
...