来自 argb 的 C# 颜色名称

Question

我有 2 个 ownerdrawn 组合框。一个是线条颜色选择器——在图片中它不是组合框。另一个是线型选择器。一旦用户在第一个组合中选择了一种颜色，线型选择器组合(参见第二张图片，最后一个组合(一个没有名称)) 必须有相同颜色的线条。

目前是这样显示的

这是两个组合的代码线条颜色选择器

    public partial class ColorPicker : ComboBox
    {
        // Data for each color in the list
        public class ColorInfo
        {
            public string Text { get; set; }
            public Color Color { get; set; }

            public ColorInfo(string text, Color color)
            {
                Text = text;
                Color = color;
            }
        }

        public ColorPicker()
        {
            InitializeComponent();

            DropDownStyle = ComboBoxStyle.DropDownList;
            DrawMode = DrawMode.OwnerDrawFixed;
            DrawItem += OnDrawItem;
        }

        // Populate control with standard colors
        public void AddStandardColors()
        {
            Items.Clear();
            Items.Add(new ColorInfo("Black", Color.Black));
            Items.Add(new ColorInfo("Blue", Color.Blue));
            Items.Add(new ColorInfo("Lime", Color.Lime));
            Items.Add(new ColorInfo("Cyan", Color.Cyan));
            Items.Add(new ColorInfo("Red", Color.Red));
            Items.Add(new ColorInfo("Fuchsia", Color.Fuchsia));
            Items.Add(new ColorInfo("Yellow", Color.Yellow));
            Items.Add(new ColorInfo("White", Color.White));
            Items.Add(new ColorInfo("Navy", Color.Navy));
            Items.Add(new ColorInfo("Green", Color.Green));
            Items.Add(new ColorInfo("Teal", Color.Teal));
            Items.Add(new ColorInfo("Maroon", Color.Maroon));
            Items.Add(new ColorInfo("Purple", Color.Purple));
            Items.Add(new ColorInfo("Olive", Color.Olive));
            Items.Add(new ColorInfo("Gray", Color.Gray));
        }

        // Draw list item
        protected void OnDrawItem(object sender, DrawItemEventArgs e)
        {
            if (e.Index >= 0)
            {
                // Get this color
                ColorInfo color = (ColorInfo)Items[e.Index];

                // Fill background
                e.DrawBackground();

                // Draw color box
                Rectangle rect = new Rectangle();
                rect.X = e.Bounds.X + 2;
                rect.Y = e.Bounds.Y + 2;
                rect.Width = 18;
                rect.Height = e.Bounds.Height - 5;
                e.Graphics.FillRectangle(new SolidBrush(color.Color), rect);
                e.Graphics.DrawRectangle(SystemPens.WindowText, rect);

                // Write color name
                Brush brush;
                if ((e.State & DrawItemState.Selected) != DrawItemState.None)
                    brush = SystemBrushes.HighlightText;
                else
                    brush = SystemBrushes.WindowText;
                e.Graphics.DrawString(color.Text, Font, brush,
                    e.Bounds.X + rect.X + rect.Width + 2,
                    e.Bounds.Y + ((e.Bounds.Height - Font.Height) / 2));

                // Draw the focus rectangle if appropriate
                if ((e.State & DrawItemState.NoFocusRect) == DrawItemState.None)
                    e.DrawFocusRectangle();
            }
        }

        /// <summary>
        /// Gets or sets the currently selected item.
        /// </summary>
        public new ColorInfo SelectedItem
        {
            get
            {
                return (ColorInfo)base.SelectedItem;
            }
            set
            {
                base.SelectedItem = value;
            }
        }

        /// <summary>
        /// Gets the text of the selected item, or sets the selection to
        /// the item with the specified text.
        /// </summary>
        public new string SelectedText
        {
            get
            {
                if (SelectedIndex >= 0)
                    return SelectedItem.Text;
                return String.Empty;
            }
            set
            {
                for (int i = 0; i < Items.Count; i++)
                {
                    if (((ColorInfo)Items[i]).Text == value)
                    {
                        SelectedIndex = i;
                        break;
                    }
                }
            }
        }

        /// <summary>
        /// Gets the value of the selected item, or sets the selection to
        /// the item with the specified value.
        /// </summary>
        public new int SelectedValue
        {
            get
            {
                if (SelectedIndex >= 0)
                    return SelectedItem.Color.ToArgb();
                return Color.White.ToArgb();
            }
            set
            {
                for (int i = 0; i < Items.Count; i++)
                {
                    if (((ColorInfo)Items[i]).Color.ToArgb() == value)
                    {
                        SelectedIndex = i;
                        break;
                    }
                }
            }
        }
    }
}

Code for lineselector combo. This is the last combo(the one with no name) on my second picture. : `


    public partial class comboBoxLineStyle : ComboBox
    {
        public comboBoxLineStyle()
        {
            InitializeComponent();
            this.DrawMode = DrawMode.OwnerDrawFixed;
            this.DropDownStyle = ComboBoxStyle.DropDownList;


        }
        protected override void OnDrawItem(DrawItemEventArgs e)
        {
            base.OnDrawItem(e);

            if (e.Index < 0) { return; }
            e.DrawBackground();
            ComboBoxItem item = (ComboBoxItem)this.Items[e.Index];
           e.Graphics.DrawImage(item.Picture,new Point(e.Bounds.X, e.Bounds.Y));

        }
        public new Image SelectedItem
        {
            get
            {
                return (Image)base.SelectedItem;
            }
            set
            {
                base.SelectedItem = value;
            }
        }
        public new Image SelectedValue
        {
            get
            {
                return (Image)base.SelectedValue;
            }
            set
            {
                base.SelectedValue = value;
            }
        }

    }

    public class ComboBoxItem
    {
        public string text;
        public Image Picture;
        public int foreColor;
        //public override string ToString()
        //{
        //    return text;
        //}

        public ComboBoxItem() { }
        public ComboBoxItem(string pText, Image pValue)
        {
            text = pText;
            Picture = pValue;
        }
        public ComboBoxItem(string pText, Image pValue, int pColor)
        {

            text = pText; Picture = pValue; foreColor = pColor;

        }


    }
}

我访问这些的形式如下:

private void DlgGraphOptions_Load(object sender, EventArgs e)
        {

            Color selCol = m_SerOpts.GetColor(idxSeries);
            int selcolARGB = selCol.ToArgb();
            Color color = Color.FromArgb(selcolARGB);

            ComboBoxItem item1Solid = new ComboBoxItem("Solid Line",Properties.Resources.Solidline,selcolARGB);
            ComboBoxItem item1dash = new ComboBoxItem("Dashed Line", Properties.Resources.dashedline,selcolARGB);
            ComboBoxItem item1dashed = new ComboBoxItem("Dashed Line", Properties.Resources.dashdash,selcolARGB);

             comboBoxLineStyle1.Items.Add(item1Solid);
            comboBoxLineStyle1.Items.Add(item1dash);
            comboBoxLineStyle1.Items.Add(item1dashed);
            comboBoxLineStyle1.SelectedIndex = 0;



              //I prefer doing something like this
comboBoxLineStyle1.ForeColor.ToArgb() = selcolARGB .


            }

m_SerOpts.GetColor(idxSeries) 方法返回一个颜色对象，但返回“00fff00”类型的名称值。如果您需要更多解释，请告诉我

`

谢谢你

Answer 1

我会使用反射来填充来自 Color 类的所有颜色的列表(尽管您可以在代码中复制它):

Dictionary<String, Color> colors = typeof(Color).GetProperties(BindingFlags.Static | BindingFlags.Public).ToDictionary(p => p.Name, p => (Color)p.GetValue(null, null) );

然后使用一种方法在这个字典中搜索与传递的颜色匹配的颜色:

public String GetColorName(Color color)
{
    return colors.Where(c => c.Value.A == color.A && c.Value.R == color.R && c.Value.G == color.G && c.Value.B == color.B).FirstOrDefault().Key;
}

如果没有匹配到颜色，则返回null。