Windows窗体中的C#垂直标签

Question

是否可以在Windows窗体中垂直显示标签？

Answer 1

标签很简单,您只需覆盖Paint事件并垂直绘制文本即可.请注意,GDI已针对水平绘制文本进行了优化.如果你旋转文字(即使你旋转90度的倍数),它看起来会更糟.

也许最好的办法是将文本绘制(或获取自己绘制的标签)到位图上,然后显示旋转的位图.

一些用于使用垂直文本绘制自定义控件的C#代码.请注意,如果文本不是水平的,则ClearType文本永远不会起作用:

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


public partial class VerticalLabel : UserControl
{
    public VerticalLabel()
    {
        InitializeComponent();
    }

    private void VerticalLabel_SizeChanged(object sender, EventArgs e)
    {
        GenerateTexture();
    }

    private void GenerateTexture()
    {
        StringFormat format = new StringFormat();
        format.Alignment = StringAlignment.Center;
        format.LineAlignment = StringAlignment.Center;
        format.Trimming = StringTrimming.EllipsisCharacter;

        Bitmap img = new Bitmap(this.Height, this.Width);
        Graphics G = Graphics.FromImage(img);

        G.Clear(this.BackColor);

        SolidBrush brush_text = new SolidBrush(this.ForeColor);
        G.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixelGridFit;
        G.DrawString(this.Name, this.Font, brush_text, new Rectangle(0, 0, img.Width, img.Height), format);
        brush_text.Dispose();

        img.RotateFlip(RotateFlipType.Rotate270FlipNone);

        this.BackgroundImage = img;
    }
}

Answer 2

创建一个类myLabel,可以在您指定的任何角度旋转它的Text.

您可以通过代码使用它或只是从ToolBox拖动

using System.Drawing;

class myLabel:System.Windows.Forms.Label
{
    public int RotateAngle { get; set; }  // to rotate your text
    public string NewText { get; set; }   // to draw text
    protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
    {
        Brush b =new SolidBrush(this.ForeColor);           
        e.Graphics.TranslateTransform(this.Width / 2, this.Height / 2);
        e.Graphics.RotateTransform(this.RotateAngle);
        e.Graphics.DrawString(this.NewText, this.Font,b , 0f, 0f);
        base.OnPaint(e);
    }
}

现在,此自定义控件将用于您的表单.

您必须在下面设置属性

 1. mylbl.Text = "";             //which can be changed by NewText property
 2. mylbl.AutoSize = false;      // adjust according to your text
 3. mylbl.NewText = "Hello";     // whatever you want to display
 4. mylbl.ForeColor = Color.Red;  // color to display
 5. mylbl.RotateAngle = -90;     //angle to rotate

Answer 3

我扩展了Javed Akram的答案,自动调整小部件的大小(我需要这个功能).它适用于正角度和负角度,Javed声明的方式:

 1. mylbl.Text = "";             // which can be changed by NewText property
 2. mylbl.AutoSize = false;      // adjust according to your text
 3. mylbl.NewText = "Hello";     // whatever you want to display
 4. mylbl.ForeColor = Color.Red; // color to display
 5. mylbl.RotateAngle = -90;     // angle to rotate

这是代码:

public class RotatingLabel : System.Windows.Forms.Label
{
    private int m_RotateAngle = 0;
    private string m_NewText = string.Empty;

    public int RotateAngle { get { return m_RotateAngle; } set { m_RotateAngle = value; Invalidate(); } }
    public string NewText { get { return m_NewText; } set { m_NewText = value; Invalidate(); } }

    protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
    {
        Func<double, double> DegToRad = (angle) => Math.PI * angle / 180.0;

        Brush b = new SolidBrush(this.ForeColor);
        SizeF size = e.Graphics.MeasureString(this.NewText, this.Font, this.Parent.Width);

        int normalAngle = ((RotateAngle % 360) + 360) % 360;
        double normaleRads = DegToRad(normalAngle);

        int hSinTheta = (int)Math.Ceiling((size.Height * Math.Sin(normaleRads)));
        int wCosTheta = (int)Math.Ceiling((size.Width * Math.Cos(normaleRads)));
        int wSinTheta = (int)Math.Ceiling((size.Width * Math.Sin(normaleRads)));
        int hCosTheta = (int)Math.Ceiling((size.Height * Math.Cos(normaleRads)));

        int rotatedWidth = Math.Abs(hSinTheta) + Math.Abs(wCosTheta);
        int rotatedHeight = Math.Abs(wSinTheta) + Math.Abs(hCosTheta);

        this.Width = rotatedWidth;
        this.Height = rotatedHeight;

        int numQuadrants = 
            (normalAngle >= 0 && normalAngle < 90) ? 1 :
            (normalAngle >= 90 && normalAngle < 180) ? 2 :
            (normalAngle >= 180 && normalAngle < 270) ? 3 :
            (normalAngle >= 270 && normalAngle < 360) ? 4 :
            0;

        int horizShift = 0;
        int vertShift = 0;

        if (numQuadrants == 1)
        {
            horizShift = Math.Abs(hSinTheta);
        }
        else if (numQuadrants == 2)
        {
            horizShift = rotatedWidth;
            vertShift = Math.Abs(hCosTheta);
        }
        else if (numQuadrants == 3)
        {
            horizShift = Math.Abs(wCosTheta);
            vertShift = rotatedHeight;
        }
        else if (numQuadrants == 4)
        {
            vertShift = Math.Abs(wSinTheta);
        }

        e.Graphics.TranslateTransform(horizShift, vertShift);
        e.Graphics.RotateTransform(this.RotateAngle);

        e.Graphics.DrawString(this.NewText, this.Font, b, 0f, 0f);
        base.OnPaint(e);
    }
}

Answer 4

我找到了一种简单的方法,无需在项目中添加代码或类!

创建标签时,只需添加:

this.label1.text = "V\nE\nR\nT\nI\nC\nA\nL\n";

这对我有用!

Answer 5

OnPaint您可以在事件或方法中旋转文本而不是标签控件Paint：

private void uc1_Paint(object sender, PaintEventArgs e)
{
    string Name;
    var g = e.Graphics;
    g.DrawString(Name, new Font("Tahoma", 8), Brushes.Black, 0, 0,
    new StringFormat(StringFormatFlags.DirectionVertical));
}