C# 取色器源码,放大镜,TakeColor

取色器小工具，拖动对屏幕进行取色，可以取16进制、10进制、RGB三个类别的颜色，可以将取色小工具置于顶层，支持取色部位放大镜展示，关键代码如下所示：
#region 功能：鼠标取色
/// <summary>
/// 功能：鼠标按下事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void pictureBox_get_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
//鼠标样式
Cursor = Cursors.Hand;
pictureBox_get.Image = TakeColor.Properties.Resources.getcolor_2;

timer_magnifying.Enabled = cb_magnifying.Checked;
}
p1 = e.Location;
}

/// <summary>
/// 功能：鼠标松开事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void pictureBox_get_MouseUp(object sender, MouseEventArgs e)
{
p2 = e.Location;

if (e.Button == MouseButtons.Left)
{
Point p = new Point(MousePosition.X, MousePosition.Y);//取置顶点坐标
IntPtr hdc = GetDC(new IntPtr(0));//取到设备场景(0就是全屏的设备场景)
int c = GetPixel(hdc, p);//取指定点颜色
int r = (c & 0xFF);//转换R
int g = (c & 0xFF00) / 256;//转换G
int b = (c & 0xFF0000) / 65536;//转换B
textBox_10jz.Text = c.ToString();//输出10进制颜色
textBox_16jz.Text = r.ToString("x").PadLeft(2, '0') + g.ToString("x").PadLeft(2, '0') + b.ToString("x").PadLeft(2, '0');//输出16进制颜色
textBox_RGB.Text = r.ToString() + ',' + g.ToString() + ',' + b.ToString();//输出RGB
pictureBox_color.BackColor = Color.FromArgb(r, g, b);//设置颜色框

//鼠标样式
Cursor = Cursors.Default;
pictureBox_get.Image = TakeColor.Properties.Resources.getcolor_1;

timer_magnifying.Enabled = false;
}
p1 = new Point(0, 0);
p2 = new Point(0, 0);
}
#endregion

取色器小工具下载路径：TakeColor