Windows Forms

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        List<int> L1 = new List<int>();
        BindingList<int> L2 = new BindingList<int>();
        private void Form1_Load(object sender, EventArgs e)
        {
            L1.Add(1);
            L1.Add(2);
            L2.Add(11);
            L2.Add(22);
            listBox1.DataSource = L1;
            listBox2.DataSource = L2;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            this.button2.Click += new System.EventHandler(this.button2_Click);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            L1.Add(3);  // adds a value to L1, but listBox1 does not display it until the binding is refresshed
            L2.Add(33); // adds a value to L2 and listBox2 is automatically refreshed to display it
        }

        private void button2_Click(object sender, EventArgs e)
        {
            // tell listBox1 to refresh the data
            ((CurrencyManager)this.BindingContext[L1]).Refresh();
        }
    }
}

kenmaMoon wrote:

how could I do?

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

kenmaMoon wrote:

yes, but the button is in the userControl, next time I want the user control shown by click the button.

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

Member 7834460 wrote:

after the 20th control, the UI doesnt show anything.

<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

private void gMapControl1_MouseClick(object sender, MouseEventArgs e)
 {
     if (e.Button == MouseButtons.Left)
     {
         double lat = gMapControl1.FromLocalToLatLng(e.X, e.Y).Lat;
         double lng = gMapControl1.FromLocalToLatLng(e.X, e.Y).Lng;
         //------------------------------------------------

private void gMapControl1_Paint(object sender, PaintEventArgs e)
{

    e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
    Pen fl = new Pen(Color.Red, 3.0f);
    e.Graphics.DrawLine(fl, x_start, y_start, xx, yy);

x_start = e.X;
 y_start = e.Y