INotifyPropertyChanged for static variable

Question

I had a variable which was not static and INotifyPropertyChanged implemented succesfully. Then I tried to make it global, so turned it a static variable. But this time, INot

Answer 1

Very good example, I used it for some general settings in application, when I want to bind some property online to components

    public sealed class DataGridClass:INotifyPropertyChanged
{
      private static readonly DataGridClass instance = new DataGridClass();
      private DataGridClass() { }

      public static DataGridClass Instance
       {
          get 
          {
             return instance; 
          }
       }

    private int _DataGridFontSize {get;set;}

    public int DataGridFontSize
    {
        get { return _DataGridFontSize; }
        set { _DataGridFontSize = value;
            RaisePropertyChanged("DataGridFontSize");
        }
    }
    public event PropertyChangedEventHandler PropertyChanged;

    private void RaisePropertyChanged(string name)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(name));
    }

Set startup properties:

DataGridClass.Instance.DataGridFontSize = 14(or read from xml)

Bind this to components properties

xmlns:static="clr-namespace:MyProject.Static"


    

When you change this value somewhere in application like "Preferences"->DataGrid FontSize - to it automatically update this property for bindings with UpdateSourceTrigger

    private void comboBoxFontSize_DropDownClosed(object sender, EventArgs e)
    {
        DataGridClass.Instance.DataGridFontSize = Convert.ToInt32(comboBoxFontSize.Text);
    }