自绘Lable的Text

最新推荐文章于 2024-01-31 22:40:47 发布

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本文介绍了一种在Windows Forms应用程序中自定义绘制Label控件的方法。通过为Label控件添加Paint事件处理器，可以实现背景填充及文字显示效果的自定义。代码示例展示了如何设置字体样式、颜色以及对齐方式等。

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        private void Form1_Load(object sender, EventArgs e)
        {
            label1.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);
Font fnt = new Font("SimSun", 10, FontStyle.Bold);

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

g.FillRectangle(blueBrush, rc);

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

        TextFormatFlags ContentAlignmentToTextFormatFlags(ContentAlignment contentAlignment)
        {
            TextFormatFlags textFormatFlags = new TextFormatFlags();

            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;
            }

            return textFormatFlags;
        }