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要自定义绘制C#单选框,可以通过继承自RadioButton控件并重写其OnPaint方法来实现。以下是一个简单的示例:
using System.Drawing; using System.Windows.Forms; public class CustomRadioButton : RadioButton { protected override void OnPaint(PaintEventArgs e) { base.OnPaint(e); // 自定义绘制单选框 Rectangle boxRect = new Rectangle(0, (this.Height - 16) / 2, 16, 16); e.Graphics.FillEllipse(Brushes.White, boxRect); e.Graphics.DrawEllipse(Pens.Black, boxRect); if (this.Checked) { Rectangle innerRect = new Rectangle(boxRect.X + 4, boxRect.Y + 4, 8, 8); e.Graphics.FillEllipse(Brushes.Black, innerRect); } // 绘制文本 using (StringFormat sf = new StringFormat()) { sf.LineAlignment = StringAlignment.Center; Rectangle textRect = new Rectangle(boxRect.Right + 5, 0, this.Width - boxRect.Right - 5, this.Height); e.Graphics.DrawString(this.Text, this.Font, Brushes.Black, textRect, sf); } } }
在上面的示例中,我们继承自RadioButton控件,并重写了其OnPaint方法来自定义绘制单选框。我们首先绘制一个白色的圆形框,并用黑色描边,然后根据单选框是否被选中来填充一个黑色的圆形。最后,我们使用DrawString方法绘制单选框的文本。
要使用这个自定义的单选框控件,只需在窗体中添加一个CustomRadioButton控件即可。例如:
CustomRadioButton customRadioButton1 = new CustomRadioButton(); customRadioButton1.Text = "Option 1"; customRadioButton1.Location = new Point(10, 10); this.Controls.Add(customRadioButton1);