添加从文本文件读取位置数据的动态控件(PictureBox)

我有一个文本文件，其中有一行。该行看起来像这样:

100 300 200 400 658 487 2636 254 245 527

这些数字表示点的X和Y坐标(第一和第二是点N1的X和Y，第三和第四是点N2的X和Y，....) .

我读取文件并将其放入数组中。我的下一步是在一个容器(面板)中绘制图片框。问题是，面板只显示控件与最后的坐标。

private void CreateBlastHole(string[] pointCoordinate)
{
    PictureBox blastHole = new PictureBox();
    blastHole.Height = 15;
    blastHole.Width = 15;
    blastHole.BackColor = Color.Blue;
    for (int i = 0; i < pointCoordinate.Length; i++)
    {
        blastHole.Left = int.Parse(pointCoordinate[i]);
        i = i + 1;
        blastHole.Top = int.Parse(pointCoordinate[i]);
        drawingPanel.Controls.Add(blastHole);
    }
    blastHole.Click += new EventHandler(BlastHole_Click);
    ToolTip tooltip1 = new ToolTip();
    // Set up delays for the tooltip
    tooltip1.AutoPopDelay = 5000;
    tooltip1.InitialDelay = 1000;
    tooltip1.ReshowDelay = 500;
    // Force the tooltip text to be displayed whether or not the form is active.
    tooltip1.ShowAlways = true;
    // Set up the tooltip text for the controls
    int axisX = blastHole.Location.X;
    int axisY = blastHole.Location.Y;
    string coordinates = "Точка N " + blastHole.Name + "X = " + axisX.ToString() + " Y = " + axisY.ToString();
    tooltip1.SetToolTip(blastHole, coordinates);
}
private void BlastHole_Click(object sender, EventArgs e)
{
    MessageBox.Show(MousePosition.X.ToString(), MousePosition.Y.ToString());
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void openButton_Click(object sender, EventArgs e)
{
    openFileDialogPoints.ShowDialog();
    string name = openFileDialogPoints.FileName;
    File.ReadAllLines(name);
    string[] points = File.ReadAllText(name).Split( );
    CreateBlastHole(points);
}
private void drawingPanel_Paint(object sender, PaintEventArgs e)
{
}
private void buttonDrawHole_Click(object sender, EventArgs e)
{
}