如何獲取「工作空間」中的像素的RGB值

Question

即時創建宏並需要檢查一些像素以確保鼠標單擊正確的位置。你會怎麼去檢查c＃中像素的RGB值？

Answer 1

。

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Windows.Forms; 
using System.Runtime.InteropServices; 
using System.Text.RegularExpressions; 


namespace Color_tool 
{ 
public partial class Form1 : Form 
{ 
    Regex rgbInputR; 
    Regex rgbInputG; 
    Regex rgbInputB; 

    Match R, G, B; 
    int r; 
    int g; 
    int b; 


    string colorX; 

    [DllImport("gdi32")] 
    private static extern int GetPixel(IntPtr hdc, int x, int y); 
    [DllImport("User32")] 
    private static extern IntPtr GetWindowDC(IntPtr hwnd); 

    private static readonly IntPtr DesktopDC = GetWindowDC(IntPtr.Zero); 

    public static System.Drawing.Color GetPixelAtCursor() 
    { 
     System.Drawing.Point p = Cursor.Position; 
     return System.Drawing.Color.FromArgb(GetPixel(DesktopDC, p.X, p.Y)); 
    } 

    public Form1() 
    { 
     InitializeComponent(); 
    } 

    private void Form1_Load(object sender, EventArgs e) 
    { 
     button1.BackColor = Color.Black; 
    } 

    private void timer1_Tick(object sender, EventArgs e) 
    { 
     colorX = GetPixelAtCursor().ToString(); 
     Color backX = GetPixelAtCursor(); 
     this.BackColor = Color.FromArgb(r,g,b); 
     label1.Text = colorX; 
     RGB_value(); 
    } 

    private void button1_Click(object sender, EventArgs e) 
    { 
     if (timer1.Enabled == false) 
      timer1.Enabled = true; 
     else 
      timer1.Enabled = false; 
    } 

    private void RGB_value() 
    { 
     rgbInputR = new Regex(@"(?<=R=)\d{0,3}"); 
     rgbInputG = new Regex(@"(?<=G=)\d{0,3}"); 
     rgbInputB = new Regex(@"(?<=B=)\d{0,3}"); 

     Match R, G, B; 

     R = rgbInputR.Match(colorX); 
     G = rgbInputG.Match(colorX); 
     B = rgbInputB.Match(colorX); 
     //had to flip the R and B ??? 
     b = int.Parse(R.Groups[0].Value); 
     g = int.Parse(G.Groups[0].Value); 
     r = int.Parse(B.Groups[0].Value); 
    } 
} 
} 

Answer 2

如果你正在測試這是我enden了很多的照顧的RGB值的位圖，

using (Bitmap bitmap = new Bitmap(img)) 
{ 
Color color = bitmap.GetPixel(0, 0); 
MessageBox.Show(color.R.toString() + color.G.toString() + color.B.toString()); 
}