如何将GroupBox的文字居中(combox文字居中)

文章开始之前，先看下图，红圈的GroupBox文字是如何居中的呢？

我们都知道，自带的Winform中的GroupBox组件的标题，是不具备居中功能的。要实现这个功能，只能自己复写BroupBox控件。

下面直接贴出代码：

using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Data; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using System.Drawing.Drawing2D; namespace RevitDevelopment.CustomControls { ///


    /// 框
    ///


    /// marc
    public class Frame : GroupBox
    {
        private string _text = "";

        /// 
        /// 构造函数
        /// 
        public Frame()
        {
            base.Text = "";
        }

        [Browsable(true)]
        [Category("Appearance")]
        [DefaultValue("GroupBoxText")]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
        public new string Text
        {
            get
            {

                return _text;
            }
            set
            {

                _text = value;
                this.Invalidate();
            }
        }

        /// 
        /// 重绘
        /// 
        ///

protected override void OnPaint(PaintEventArgs e) { //first let the base class to draw the control base.OnPaint(e); //create a brush with fore color SolidBrush colorBrush = new SolidBrush(this.ForeColor); //create a brush with back color var backColor = new SolidBrush(this.BackColor); //measure the text size var size = TextRenderer.MeasureText(this.Text, this.Font); // evaluate the postiong of text from left; int left = (this.Width - size.Width) / 2; //draw a fill rectangle in order to remove the border e.Graphics.FillRectangle(backColor, new Rectangle(left, 0, size.Width, size.Height)); //draw the text Now e.Graphics.DrawString(this.Text, this.Font, colorBrush, new PointF(left, 0)); } } }

编写上面的自定义控件，自己保存起来。然后编译后，在“工具箱”中就可以找到这个控件了：