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& & & & C#中利用GDI+绘制旋转文本的文字，网上有很多资料，基本都使用矩阵旋转的方式实现。但基本都只提及按点旋转，若要实现在矩形范围内旋转文本，资料较少。经过琢磨，可以将矩形内旋转转化为按点旋转，不过需要经过不少的计算过程。利用下面的类可以实现该功能。
using System.Collections.G
using System.D
using System.Drawing.Drawing2D;
namespace RotateText
public class GraphicsText
private Graphics _
public GraphicsText()
public Graphics Graphics
get { return _ }
set { _graphics = }
/// &summary&
/// 绘制根据矩形旋转文本
/// &/summary&
/// &param name=&s&&文本&/param&
/// &param name=&font&&字体&/param&
/// &param name=&brush&&填充&/param&
/// &param name=&layoutRectangle&&局部矩形&/param&
/// &param name=&format&&布局方式&/param&
/// &param name=&angle&&角度&/param&
public void DrawString(string s, Font font, Brush brush, RectangleF layoutRectangle, StringFormat format, float angle)
// 求取字符串大小
SizeF size = _graphics.MeasureString(s, font);
// 根据旋转角度，求取旋转后字符串大小
SizeF sizeRotate = ConvertSize(size, angle);
// 根据旋转后尺寸、布局矩形、布局方式计算文本旋转点
PointF rotatePt = GetRotatePoint(sizeRotate, layoutRectangle, format);
// 重设布局方式都为Center
StringFormat newFormat = new StringFormat(format);
newFormat.Alignment = StringAlignment.C
newFormat.LineAlignment = StringAlignment.C
// 绘制旋转后文本
DrawString(s, font, brush, rotatePt, newFormat, angle);
/// &summary&
/// 绘制根据点旋转文本，一般旋转点给定位文本包围盒中心点
/// &/summary&
/// &param name=&s&&文本&/param&
/// &param name=&font&&字体&/param&
/// &param name=&brush&&填充&/param&
/// &param name=&point&&旋转点&/param&
/// &param name=&format&&布局方式&/param&
/// &param name=&angle&&角度&/param&
public void DrawString(string s, Font font, Brush brush, PointF point, StringFormat format, float angle)
// Save the matrix
Matrix mtxSave = _graphics.T
Matrix mtxRotate = _graphics.T
mtxRotate.RotateAt(angle, point);
_graphics.Transform = mtxR
_graphics.DrawString(s, font, brush, point, format);
// Reset the matrix
_graphics.Transform = mtxS
private SizeF ConvertSize(SizeF size, float angle)
Matrix matrix = new Matrix();
matrix.Rotate(angle);
// 旋转矩形四个顶点
PointF[] pts = new PointF[4];
pts[0].X = -size.Width / 2f;
pts[0].Y = -size.Height / 2f;
pts[1].X = -size.Width / 2f;
pts[1].Y = size.Height / 2f;
pts[2].X = size.Width / 2f;
pts[2].Y = size.Height / 2f;
pts[3].X = size.Width / 2f;
pts[3].Y = -size.Height / 2f;
matrix.TransformPoints(pts);
// 求取四个顶点的包围盒
float left = float.MaxV
float right = float.MinV
float top = float.MaxV
float bottom = float.MinV
foreach(PointF pt in pts)
// 求取并集
if(pt.X & left)
left = pt.X;
if(pt.X & right)
right = pt.X;
if(pt.Y & top)
top = pt.Y;
if(pt.Y & bottom)
bottom = pt.Y;
SizeF result = new SizeF(right - left, bottom - top);
private PointF GetRotatePoint(SizeF size, RectangleF layoutRectangle, StringFormat format)
PointF pt = new PointF();
switch (format.Alignment)
case StringAlignment.Near:
pt.X = layoutRectangle.Left + size.Width / 2f;
case StringAlignment.Center:
pt.X = (layoutRectangle.Left + layoutRectangle.Right) / 2f;
case StringAlignment.Far:
pt.X = layoutRectangle.Right - size.Width / 2f;
switch (format.LineAlignment)
case StringAlignment.Near:
pt.Y = layoutRectangle.Top + size.Height / 2f;
case StringAlignment.Center:
pt.Y = (layoutRectangle.Top + layoutRectangle.Bottom) / 2f;
case StringAlignment.Far:
pt.Y = layoutRectangle.Bottom - size.Height / 2f;
测试代码如下：
using System.Collections.G
using System.D
using System.D
using System.Windows.F
namespace RotateText
public partial class FormMain : Form
private Font _font = new Font(&Arial&, 12);
private Brush _brush = new SolidBrush(Color.Black);
private Pen _pen = new Pen(Color.Black, 1f);
private string _text = &Crow Soft&;
public FormMain()
InitializeComponent();
protected override void OnPaint(PaintEventArgs e)
base.OnPaint(e);
GraphicsText graphicsText = new GraphicsText();
graphicsText.Graphics = e.G
// 绘制围绕点旋转的文本
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.C
format.LineAlignment = StringAlignment.C
graphicsText.DrawString(_text, _font, _brush, new PointF(100, 80), format, 45f);
graphicsText.DrawString(_text, _font, _brush, new PointF(200, 80), format, -45f);
graphicsText.DrawString(_text, _font, _brush, new PointF(300, 80), format, 90f);
graphicsText.DrawString(_text, _font, _brush, new PointF(400, 80), format, -60f);
// 绘制矩形内旋转的文本
// First line
RectangleF rc = RectangleF.FromLTRB(50, 150, 200, 230);
RectangleF rect =
format.Alignment = StringAlignment.N
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, 30);
rect.Location += new SizeF(180, 0);
format.LineAlignment = StringAlignment.N
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, -30);
rect.Location += new SizeF(180, 0);
format.LineAlignment = StringAlignment.C
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, -90);
rect.Location += new SizeF(180, 0);
format.LineAlignment = StringAlignment.F
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, 70);
// Second line
rect.Location += new SizeF(0, 100);
format.Alignment = StringAlignment.C
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, 40);
rect.Location += new SizeF(180, 0);
format.LineAlignment = StringAlignment.N
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, 30);
rect.Location += new SizeF(180, 0);
format.LineAlignment = StringAlignment.C
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, -70);
rect.Location += new SizeF(180, 0);
format.LineAlignment = StringAlignment.F
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, 60);
// Third line
rect.Location += new SizeF(0, 200);
format.Alignment = StringAlignment.F
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, -30);
rect.Location += new SizeF(180, 0);
format.LineAlignment = StringAlignment.N
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, -30);
rect.Location += new SizeF(180, 0);
format.LineAlignment = StringAlignment.C
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, 90);
rect.Location += new SizeF(180, 0);
format.LineAlignment = StringAlignment.F
e.Graphics.DrawRectangle(_pen, rect.Left, rect.Top, rect.Width, rect.Height);
graphicsText.DrawString(_text, _font, _brush, rect, format, 45);
效果如下图：
资源地址：http://download.csdn.net/detail/alicehyxx/6626473
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作者：zhuzhao
字体：[ ] 类型：转载 时间：
这篇文章主要介绍了C#实现在图像中绘制文字图形的方法,涉及绘图及图像的相关操作技巧,需要的朋友可以参考下
本文实例讲述了C#实现在图像中绘制文字图形的方法。分享给大家供大家参考。具体实现方法如下：
using System.Collections.G
using System.D
using System.D
using System.T
using System.Windows.F
using System.Drawing.Drawing2D;
using System.Drawing.I
namespace WindowsApplication2
public partial class Form20 : Form
public Form20()
InitializeComponent();
private void Form20_Load(object sender, EventArgs e)
private void button1_Click(object sender, EventArgs e)
Rectangle rect = new Rectangle(0, 0, 100, 100);
Graphics dg = this.CreateGraphics();
Image image = new Bitmap(rect.Width, rect.Height, dg);
Graphics ig = Graphics.FromImage(image);
ig.FillRectangle(Brushes.Black, rect);
Font font = new Font("Arial", 12);
Brush brush = System.Drawing.Brushes.W
ig.DrawString("zhuzhao", font, brush,0, 0);
//ImageFormat iformat=new ImageFormat(new Guid(Bmp));
image.Save(@"c:/image.png");
dg.DrawImage(image,new PointF(100,100));
希望本文所述对大家的C#程序设计有所帮助。
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