Does DataGridView1 connect to my universal list?

Question

dataGridView1 I want to connect to my universal list. For this, I use the code below.

dataGridView1.DataSource = List;

(Static list)

But every time I want to update the list, the general data of GridView1 also gets an update. What should I do?

Answer 1

Use BindingList<T>; this provides notifications of cover changes (add, remove, etc.). It also provides row level notifications (for property changes), but only if your type implements correctly INotifyPropertyChanged; so implement this.

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:

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

static class Program
{
    class Foo
    {
        public int A { get; set; }
        public string B { get; set; }
    }
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        using (var form = new Form())
        using (var grid = new DataGridView { Dock = DockStyle.Fill })
        using (var add = new Button { Dock = DockStyle.Bottom, Text = "add" })
        using (var remove = new Button { Dock = DockStyle.Top, Text = "remove" })
        {
            form.Controls.Add(grid);
            form.Controls.Add(add);
            form.Controls.Add(remove);
            var lst = new BindingList<Foo>();
            var rnd = new Random();
            add.Click += delegate
            {
                lst.Add(new Foo { A = rnd.Next(1, 6), B = "new" });
            };
            remove.Click += delegate
            {
                int index = 0;
                foreach (var row in lst)
                { // just to illustrate removing a row by predicate
                    if (row.A == 2) { lst.RemoveAt(index); break; }
                    index++;
                }
            };
            grid.DataSource = lst;
            Application.Run(form);
        }
    }
}