mes-client/UAS_MES_JH/CustomControl/TextBoxWithIcon/RoundTextBox.cs

using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace UAS_MES_NEW.CustomControl.TextBoxWithIcon
{
    public partial class RoundTextBox : UserControl
    {
        TextBox box = new TextBox();

        public RoundTextBox()
        {
            InitializeComponent();
            box.BorderStyle = BorderStyle.None;
            box.Width = this.Width;
            box.KeyDown += Box_KeyDown;
            this.Controls.Add(box);
        }

        private void Box_KeyDown(object sender, KeyEventArgs e)
        {
            UserKeyDown?.Invoke(sender, e);
        }

        public new char PassWordChar
        {
            get { return box.PasswordChar; }
            set
            {
                box.PasswordChar = value;
            }
        }

        [DefaultValue("")]
        public new string Text
        {
            get { return box.Text; }
            set
            {
                box.Text = value;
            }
        }

        public delegate void OnUserKeyDown(object sender, KeyEventArgs e);
        //定义事件
        public event OnUserKeyDown UserKeyDown;

        int r = 6;
        [Category("布局"), Description("倒角半径。")]
        public int R
        {
            get { return r; }
            set
            {
                r = value;
            }
        }

        private void RoundTextBox_Paint(object sender, PaintEventArgs e)
        {
            int w = R * 2;
            base.OnPaintBackground(e);
            e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
            using (GraphicsPath path = new GraphicsPath())
            {
                path.AddArc(0, 0, w, w, 180, 90);
                path.AddArc(this.Width - w - 1, 0, w, w, -90, 90);
                path.AddArc(this.Width - w - 1, this.Height - w - 1, w, w, 0, 90);
                path.AddArc(0, this.Height - w - 1, w, w, 90, 90);
                path.CloseFigure();
                e.Graphics.FillPath(Brushes.White, path);
                using (Pen pen = new Pen(Color.Gray))
                {
                    e.Graphics.DrawPath(pen, path);
                }
            }
        }

        private void RoundTextBox_Resize(object sender, EventArgs e)
        {
            box.Left = 5;
            box.Top = 3;
        }
    }
}