Windowsformscombobox自定义表单颜色

我一直在玩自定义WinFormcombobox…到目前为止，我有以下内容：

使用此代码：

public class ComboBoxWithBorder : ComboBox { private Color _borderColor = Color.Black; private ButtonBorderStyle _borderStyle = ButtonBorderStyle.Solid; private static int WM_PAINT = 0x000F; protected override void WndProc(ref Message m) { base.WndProc(ref m); if (m.Msg == WM_PAINT) { Graphics g = Graphics.FromHwnd(Handle); Rectangle bounds = new Rectangle(0, 0, Width, Height); ControlPaint.DrawBorder(g, bounds, _borderColor, _borderStyle); } } [Category("Appearance")] public Color BorderColor { get { return _borderColor; } set { _borderColor = value; Invalidate(); // causes control to be redrawn } } [Category("Appearance")] public ButtonBorderStyle BorderStyle { get { return _borderStyle; } set { _borderStyle = value; Invalidate(); } } } 

但是，我正在努力实现与此类似的东西：

是否可以将白色下拉框的背景颜色更改为更暗的颜色？

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是否可以将下拉列表边框从白色更改为其他颜色？

Answer 1

试试这堂课

参考

 using Microsoft.VisualBasic; using System; using System.Collections; using System.Collections.Generic; using System.Data; using System.Diagnostics; public class FlatCombo : ComboBox { private Brush BorderBrush = new SolidBrush(SystemColors.Window); private Brush ArrowBrush = new SolidBrush(SystemColors.ControlText); private Brush DropButtonBrush = new SolidBrush(SystemColors.Control); private Color _ButtonColor = SystemColors.Control; public Color ButtonColor { get { return _ButtonColor; } set { _ButtonColor = value; DropButtonBrush = new SolidBrush(this.ButtonColor); this.Invalidate(); } } protected override void WndProc(ref Message m) { base.WndProc(m); switch (m.Msg) { case 0xf: //Paint the background. Only the borders //will show up because the edit //box will be overlayed Graphics g = this.CreateGraphics; Pen p = new Pen(Color.White, 2); g.FillRectangle(BorderBrush, this.ClientRectangle); //Draw the background of the dropdown button Rectangle rect = new Rectangle(this.Width - 15, 3, 12, this.Height - 6); g.FillRectangle(DropButtonBrush, rect); //Create the path for the arrow Drawing2D.GraphicsPath pth = new Drawing2D.GraphicsPath(); PointF TopLeft = new PointF(this.Width - 13, (this.Height - 5) / 2); PointF TopRight = new PointF(this.Width - 6, (this.Height - 5) / 2); PointF Bottom = new PointF(this.Width - 9, (this.Height + 2) / 2); pth.AddLine(TopLeft, TopRight); pth.AddLine(TopRight, Bottom); g.SmoothingMode = Drawing2D.SmoothingMode.HighQuality; //Determine the arrow's color. if (this.DroppedDown) { ArrowBrush = new SolidBrush(SystemColors.HighlightText); } else { ArrowBrush = new SolidBrush(SystemColors.ControlText); } //Draw the arrow g.FillPath(ArrowBrush, pth); break; default: break; // TODO: might not be correct. Was : Exit Select break; } } //Override mouse and focus events to draw //proper borders. Basically, set the color and Invalidate(), //In general, Invalidate causes a control to redraw itself. #region "Mouse and focus Overrides" protected override void OnMouseEnter(System.EventArgs e) { base.OnMouseEnter(e); BorderBrush = new SolidBrush(SystemColors.Highlight); this.Invalidate(); } protected override void OnMouseLeave(System.EventArgs e) { base.OnMouseLeave(e); if (this.Focused) return; BorderBrush = new SolidBrush(SystemColors.Window); this.Invalidate(); } protected override void OnLostFocus(System.EventArgs e) { base.OnLostFocus(e); BorderBrush = new SolidBrush(SystemColors.Window); this.Invalidate(); } protected override void OnGotFocus(System.EventArgs e) { base.OnGotFocus(e); BorderBrush = new SolidBrush(SystemColors.Highlight); this.Invalidate(); } protected override void OnMouseHover(System.EventArgs e) { base.OnMouseHover(e); BorderBrush = new SolidBrush(SystemColors.Highlight); this.Invalidate(); } #endregion }