实现效果：
知识运用：
Color对象的RGB属性
实现代码：
private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog open = new OpenFileDialog();
open.Filter = "*.jpg,*.jpeg,*.bmp,*.png,*.tif,*.wmf|*.jpg;*.jpeg;*.bmp;*.png;*.tif;*.wmf";
open.ShowDialog();
Image image = System.Drawing.Image.FromFile(open.FileName);
pictureBox1.Image = image;
}
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
Bitmap bitmap = (Bitmap)pictureBox1.Image;
try
{
Color color = bitmap.GetPixel(e.X,e.Y);
textBox1.Text = color.R.ToString();
textBox2.Text = color.G.ToString();
textBox3.Text = color.B.ToString();
}
catch {}
}
