label标题过长时显示...

最新推荐文章于 2022-12-08 14:06:45 发布

原创最新推荐文章于 2022-12-08 14:06:45 发布 · 847 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#object #class

Ｃ# 专栏收录该内容

118 篇文章

订阅专栏

本文介绍了一种自定义实现的Label控件，该控件能够通过重写Paint事件来自绘文字，并支持不同的对齐方式及文字溢出处理。通过设置TextOutputFormats属性，可以调整文本在Label上的显示效果。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

    public class MyLable : Label
    {
        private TextFormatFlags textOutputFormat = TextFormatFlags.WordEllipsis;
        //标题输出方式
        [Browsable(false)]
        [Localizable(false)]
        [DefaultValue(TextFormatFlags.WordEllipsis)]
        public TextFormatFlags TextOutputFormats
        {
            set
            {
                this.textOutputFormat = value;
            }
            get
            {
                return this.textOutputFormat;
            }
        }

        public MyLable()
        {
            this.Paint += new System.Windows.Forms.PaintEventHandler(PaintEvent);
        }

        //自绘显示提示信息
        private void PaintEvent(object sender, PaintEventArgs e)
        {
            Label label = ((Label)sender);

Graphics g = e.Graphics;

SolidBrush blueBrush = new SolidBrush(label.BackColor);

Rectangle rc = new Rectangle(0, 0, label.Width, label.Height);

g.FillRectangle(blueBrush, rc);

            System.Windows.Forms.TextRenderer.DrawText(
                g, label.Text, label.Font, rc, label.ForeColor,
                this.TextOutputFormats | MyLable.ContentAlignmentToTextFormatFlags(label.TextAlign));
        }

        //从未使用MyLable　ContentAlignmentToTextFormatFlags:Void 的“this”参数。根据需要，将成员标记为 static
        static private TextFormatFlags ContentAlignmentToTextFormatFlags(ContentAlignment contentAlignment)
        {
            TextFormatFlags textFormatFlags = TextFormatFlags.Bottom;

            switch (contentAlignment)
            {
                case ContentAlignment.BottomCenter:
                    //上，左右居中
                    textFormatFlags = TextFormatFlags.Bottom | TextFormatFlags.HorizontalCenter;
                    break;
                case ContentAlignment.BottomLeft:
                    textFormatFlags = TextFormatFlags.Bottom | TextFormatFlags.Left;
                    break;
                case ContentAlignment.BottomRight:
                    textFormatFlags = TextFormatFlags.Bottom | TextFormatFlags.Right;
                    break;
                case ContentAlignment.MiddleCenter:
                    textFormatFlags = TextFormatFlags.VerticalCenter | TextFormatFlags.HorizontalCenter;
                    break;
                case ContentAlignment.MiddleLeft:
                    textFormatFlags = TextFormatFlags.VerticalCenter | TextFormatFlags.Left;
                    break;
                case ContentAlignment.MiddleRight:
                    textFormatFlags = TextFormatFlags.VerticalCenter | TextFormatFlags.Right;
                    break;
                case ContentAlignment.TopCenter:
                    textFormatFlags = TextFormatFlags.Top | TextFormatFlags.HorizontalCenter;
                    break;
                case ContentAlignment.TopLeft:
                    textFormatFlags = TextFormatFlags.Top | TextFormatFlags.Left;
                    break;
                case ContentAlignment.TopRight:
                    textFormatFlags = TextFormatFlags.Top | TextFormatFlags.Right;
                    break;
                default:
                    break;
            }