按下按鈕后，只有在單擊鼠標后才能從圖片框中獲取像素屬性c＃

Question

我有以下代碼：

    private void Calculate_Click(object sender, EventArgs e)
    {
        if (MessageBox.Show("Please click the object in the image ", "", MessageBoxButtons.OKCancel, MessageBoxIcon.Exclamation, MessageBoxDefaultButton.Button1) == DialogResult.OK)
        {
            click_the_object();
        }
    }

在click_the_object（）函數中，我想點擊圖片框中的一個像素並獲得它的顏色。

獲取像素屬性的函數是：

    private Color culoarepixel(Point point)
    {
        Bitmap bitmap = (Bitmap)pbOriginal.Image;

        return bitmap.GetPixel(point.X, point.Y);
    }

問題是我不知道如何使click_the_object（）函數記錄只有一次點擊，第一次點擊。 我嘗試使用eventhandler，但它進入循環。

Answer 1

public Form1()
{
    InitializeComponent();
    this.myPictureBox.BackColor = Color.Red;
}

private void startButton_Click(object sender, EventArgs e)
{
    if (MessageBox.Show(
        "Please click the object in the image ",
        "", 
        MessageBoxButtons.OKCancel, 
        MessageBoxIcon.Exclamation, 
        MessageBoxDefaultButton.Button1) == DialogResult.OK)
    {
        this.myPictureBox.MouseClick += this.myPictureBox_MouseClick;
    }
}

void myPictureBox_MouseClick(object sender, MouseEventArgs e)
{
    this.myPictureBox.MouseClick -= myPictureBox_MouseClick;
    var point = new Point(e.X, e.Y);
    MessageBox.Show(string.Format("You've selected a pixel with coordinates: {0}:{1}", point.X, point.Y));
}