.NET Propertygrid refresh trouble

Property grid do not show new value of selected object.

For example:

o.val = "1";
pg.SelectedObject = o;
o.val = "2";
p开发者_JS百科g.Refresh();

The property in property grid is still "1"; It is changing only if you click on this property.

Or like that:

o.val = "1";
pg.SelectedObject = o;
o.val = "2";
pg.SelectedObject = o;

but in this case focus will be changed to PropertyGrid.

As I told you in my comment, your code is not enough to understand your issue. Presented like this it should work. Here is mine that works well:

public class Target
{
    private int _myInt = 1;
    public int MyInt { set; get; }

    public static Target target = new Target();
}

static class Program
{
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();

        Button button = new Button()
        {
            Text = "Click me",
            Dock = DockStyle.Bottom
        };

        Form form = new Form
        {
            Controls = {
                new PropertyGrid {
                    SelectedObject = Target.target,
                    Dock = DockStyle.Fill,
                },
                button
            }
        };

        button.Click += new EventHandler(button_Click);
        Application.Run(form);
    }

    static void button_Click(object sender, EventArgs e)
    {
        Target.target.MyInt = 2;
        Form form = Form.ActiveForm;
        (form.Controls[0] as PropertyGrid).Refresh();
    }
}

The call to Refresh() actually rebuilds the grid. Remove it and you will see the change only when you click the property.

Cause you just not gave some code, here is a working example. Just put a Button and a PropertyGrid onto a form.

using System;
using System.ComponentModel;
using System.Windows.Forms;

namespace WindowsFormsApplication
{
    public partial class FormMain : Form
    {
        Random rand;
        MyObject obj;

        public FormMain()
        {
            InitializeComponent();

            rand = new Random();
            obj = new MyObject();

            propertyGrid1.SelectedObject = obj;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            obj.MyValue = rand.Next();
            obj.IsEnabled = !obj.IsEnabled;
            obj.MyText = DateTime.Now.ToString();

            propertyGrid1.Refresh();
        }
    }

    public class MyObject : INotifyPropertyChanged
    {
        private int _MyValue;
        public int MyValue
        {
            get
            {
                return _MyValue;
            }
            set
            {
                _MyValue = value;
                NotifyPropertyChanged("MyValue");
            }
        }

        private string _MyText;
        public string MyText
        {
            get
            {
                return _MyText;
            }
            set
            {
                _MyText = value;
                NotifyPropertyChanged("MyText");
            }
        }

        private bool _IsEnabled;
        public bool IsEnabled
        {
            get
            {
                return _IsEnabled;
            }
            set
            {
                _IsEnabled = value;
                NotifyPropertyChanged("IsEnabled");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        private void NotifyPropertyChanged(String info)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }
    }
}