Question

C#,textbox怎么把边框设置颜色,把四个角改成圆角,设置属性可以吗?

Answer 1

textbox 系统控件，直接改肯定是没办法的，只能自己重写控件，继承TextBox
而且圆角应该只能完全重写控件
给你个改边框颜色的代码
public class MyTextBox : TextBox
{

public MyTextBox()
{
this.BorderStyle = BorderStyle.FixedSingle;
}
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == 0xf || m.Msg == 0x14 || m.Msg == 0x85)
{
if (this.BorderStyle == BorderStyle.FixedSingle)
{
using (Graphics g = Graphics.FromHwnd(this.Handle))
{
using (Pen pen = new Pen(Color.Red))
{
g.DrawRectangle(pen, 0, 0, this.Width - 1, this.Height - 1);
}
}
}
}
}
}

Answer 2

//重绘边框

private void panel1_Paint(object sender, PaintEventArgs e)

{
//调用

Draw(panel1.ClientRectangle, panel1.CreateGraphics(), 1);

}
//重绘边框

private void Draw(Rectangle rectangle, Graphics g, int _radius)

{

Pen shadowPen = new Pen(Color.Black);

g.DrawPath(shadowPen, DrawRoundRect(rectangle.X, rectangle.Y, rectangle.Width - 2, rectangle.Height - 1, _radius));

}
public static GraphicsPath DrawRoundRect(int x, int y, int width, int height, int radius)
{

GraphicsPath gp = new GraphicsPath();
gp.AddArc(x, y, radius, radius, 180, 90);

gp.AddArc(width - radius, y, radius, radius, 270, 90);

gp.AddArc(width - radius, height - radius, radius, radius, 0, 90);

gp.AddArc(x, height - radius, radius, radius, 90, 90);

gp.CloseAllFigures(); return gp;

}

Answer 3

哈哈,这简单!没有这个选项，除非自绘重写控件。