如何将位图照片转换为十六进制颜色代码

Question

我正在尝试为我的简历创建一个程序 但是我在将灰度照片的位图照片转换为十六进制或更好的位图照片时遇到问题，如果颜色有人可以帮助我，则将其称为代码？

我尝试使用 base64string 转换它，但它不起作用。

openFileDialog1=new OpenFileDialog();
OpenFileDialog dlg = new OpenFileDialog();
dlg.Title = "Open Image";
dlg.Filter = "bmp files (*.bmp)|*.bmp";
if (dlg.ShowDialog() == DialogResult.OK)
{
     Rectangle bounds = Screen.GetBounds(Point.Empty);
     Bitmap bitmap = new Bitmap(bounds.Width, bounds.Height);
using (Graphics g = Graphics.FromImage(bitmap))
{
     g.CopyFromScreen(Point.Empty, Point.Empty, bounds.Size);
}
// Convert the image to byte[]
System.IO.MemoryStream stream = new System.IO.MemoryStream();
bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp);
byte[] imageBytes = stream.ToArray();
// Convert byte[] to Base64 String
string base64String = Convert.ToBase64String(imageBytes);
// Write the bytes (as a Base64 string) to the textbox
textBox1.Text = base64String.ToString();

我希望看到一堆像A9C或255这样的数字，但我看到的东西什么都没有。

Answer 1

它像在代码中一样处理.bmp文件，并提供像素的 AARRGGBB 代码。

using System;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
namespace WindowsFormsApp2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog dlg = new OpenFileDialog())
            {
                dlg.Title = "Open Image";
                dlg.Filter = "bmp files (*.bmp)|*.bmp";
                if (dlg.ShowDialog() == DialogResult.OK)
                {
                    var colorCodes = this.GetColorCodes(dlg.FileName);
                    var str = string.Join(Environment.NewLine,
                                          colorCodes.Select<int[], string>(line => string.Join(" ", line.Select<int, string>(code => string.Format("{0:X8}", code))))); // string.Format("{0:X6}", code & 0x00FFFFFF) if you want RRGGBB format
                    textBox1.Text = str; // requires textBox1.Multiline = true, better have monospaced font
                }
            }
        }
        private int[][] GetColorCodes(string path)
        {
            var bitmap = new Bitmap(path);
            return Enumerable.Range(0, bitmap.Height)
                             .Select<int, int[]>(y => Enumerable.Range(0, bitmap.Width)
                                                    .Select<int, int>(x => bitmap.GetPixel(x, y).ToArgb())
                                                    .ToArray())
                             .ToArray();
        }
    }
}