效果图
获取winfrom控件上图片的颜色值的核心代码
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
int x, y;
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
// 创建Bitmap对象加载图片
Bitmap image = pictureBox1.Image as Bitmap;// new Bitmap(imagePath);
//int tempx = image.Width / pictureBox1.Width;
//int tempy = image.Height / pictureBox1.Height;
x = e.X;
y = e.Y;
// 获取像素点的颜色
Color pixelColor = image.GetPixel(x, y);
// 可以通过pixelColor的R、G、B、A属性获取分别对应的红、绿、蓝、透明度值
int red = pixelColor.R;
int green = pixelColor.G;
int blue = pixelColor.B;
int alpha = pixelColor.A;
label2.Text = "R:" + red + " G:" + green + " B:" + blue + " alpha:" + alpha + " x" + x + " y" + y;
panel1.BackColor = Color.FromArgb(red, green, blue);
}
private void pictureBox2_MouseMove(object sender, MouseEventArgs e)
{
//lqwvje 2024-05-17
//为了用户更好的体验，我们可以这样，
//if (Control.MouseButtons == MouseButtons.Left)
//当鼠标按下左键时获取颜色值
//当鼠标左键松开时，确认所获取的颜色值 把下面的点击事件改成 MouseUp 事件
// 创建Bitmap对象加载图片
Bitmap image = pictureBox2.Image as Bitmap;// new Bitmap(imagePath);
int tempx = image.Width / pictureBox2.Width;
int tempy = image.Height / pictureBox2.Height;
x = e.X * tempx;//成比例的缩放
y = e.Y * tempy;
// 获取像素点的颜色
Color pixelColor = image.GetPixel(x, y);
// 可以通过pixelColor的R、G、B、A属性获取分别对应的红、绿、蓝、透明度值
int red = pixelColor.R;
int green = pixelColor.G;
int blue = pixelColor.B;
int alpha = pixelColor.A;
label2.Text = "R:" + red + " G:" + green + " B:" + blue + " alpha:" + alpha + " x" + x + " y" + y;
panel1.BackColor = Color.FromArgb(red, green, blue);
}
private void pictureBox1_Click(object sender, EventArgs e)
{
Bitmap image = pictureBox1.Image as Bitmap;// new Bitmap(imagePath);
// 获取像素点的颜色
Color pixelColor = image.GetPixel(x, y);
// 可以通过pixelColor的R、G、B、A属性获取分别对应的红、绿、蓝、透明度值
int red = pixelColor.R;
int green = pixelColor.G;
int blue = pixelColor.B;
int alpha = pixelColor.A;
label1.Text = "左击确认选中的颜色 " + "R:" + red + " G:" + green + " B:" + blue + " alpha:" + alpha + " x" + x + " y" + y;
panel2.BackColor = Color.FromArgb(red, green, blue);
}
private void pictureBox2_Click(object sender, EventArgs e)
{
Bitmap image = pictureBox2.Image as Bitmap;// new Bitmap(imagePath);
// 获取像素点的颜色
Color pixelColor = image.GetPixel(x, y);
// 可以通过pixelColor的R、G、B、A属性获取分别对应的红、绿、蓝、透明度值
int red = pixelColor.R;
int green = pixelColor.G;
int blue = pixelColor.B;
int alpha = pixelColor.A;
label1.Text = "左击确认选中的颜色 " + "R:" + red + " G:" + green + " B:" + blue + " alpha:" + alpha + " x" + x + " y" + y;
panel2.BackColor = Color.FromArgb(red, green, blue);
}
}获取屏幕上某区域的颜色值核心代码(注意电脑分辨率的比例)
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
[DllImport("gdi32.dll")]
static public extern uint GetPixel(IntPtr hDC, int XPos, int YPos);
[DllImport("gdi32.dll")]
static public extern IntPtr CreateDC(string driverName, string deviceName, string output, IntPtr lpinitData);
[DllImport("gdi32.dll")]
static public extern bool DeleteDC(IntPtr DC);
static public byte GetRValue(uint color)
{
return (byte)color;
}
static public byte GetGValue(uint color)
{
return ((byte)(((short)(color)) >> 8));
}
static public byte GetBValue(uint color)
{
return ((byte)((color) >> 16));
}
static public byte GetAValue(uint color)
{
return ((byte)((color) >> 24));
}
public Color GetColor(Point screenPoint)
{
IntPtr displayDC = CreateDC("DISPLAY", null, null, IntPtr.Zero);
uint colorref = GetPixel(displayDC, screenPoint.X, screenPoint.Y);
DeleteDC(displayDC);
byte Red = GetRValue(colorref);
byte Green = GetGValue(colorref);
byte Blue = GetBValue(colorref);
return Color.FromArgb(Red, Green, Blue);
}
private void timer1_Tick(object sender, EventArgs e)
{
Point pt = new Point(Control.MousePosition.X, Control.MousePosition.Y);
Color cl = GetColor(pt);
panel1.BackColor = cl;
this.Text = cl.R + " " + cl.G + " " + cl.B;
}
private void Form1_Load(object sender, EventArgs e)
{
timer1.Start();
}
}相关素材和源码下载地址 https://pan.baidu.com/s/1PTt1r7mCywGGac_pC0Bysw?pwd=d7tk 提取码: d7tk
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