C#中实现文字按指定的路径排列

核心提示： 这个的难点在于排版的算法上，其他的就是对GDI+中GraphicsPath的应用，C#中实现文字按指定的路径排列，以下为核心部分的源代码：using System;using System.Collections;using System.Collections.Generic;using System.Data;u

 这个的难点在于排版的算法上，其他的就是对GDI+中GraphicsPath的应用。以下为核心部分的源代码：

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;

namespace Lgms.net.Drawing
{
public enum PathAlign //文字在路径方向的对齐方向
{
Left = 0, //从第一点开始排列
Center = 1, //居中排列
Right = 2 //居右排列
}
public enum TextPosition //文字排列在路径上的位置
{
OverPath = 0, //路径之上
CenterPath = 1, //路径中间，文字中心即路径经过区域
UnderPath = 2 //路径下方
}

//基础类
public class TextOnPath
{
private PathData _pathdataTOP;
private string _textTOP;
private Font _fontTOP;
private Color _pathcolorTOP = Color.Red;
private Color _colorTOP = Color.Black;
private Color _fillcolorTOP = Color.Black;
private PathAlign _pathalignTOP = PathAlign.Center;
private int _letterspacepercentageTOP = 100;
private bool _addsvg = false;
private System.Text.StringBuilder _SVG;
private int _currentPathID;
private TextPosition _textPathPosition = TextPosition.CenterPath;
public Exception LastError = null;
public bool ShowPath = true;
public TextPosition TextPathPosition
{
get { return _textPathPosition; }
set { _textPathPosition = value; }
}
public PathData PathDataTOP
{
get { return _pathdataTOP; }
set { _pathdataTOP = value; }
}

public string TextTOP
{
get { return _textTOP; }
set { _textTOP = value; }
}

public Font FontTOP
{
get { return _fontTOP; }
set { _fontTOP = value; }
}

public Color PathColorTOP
{
get { return _pathcolorTOP; }
set { _pathcolorTOP = value; }
}
public Color ColorTOP
{
get { return _colorTOP; }
set { _colorTOP = value; }
}

public Color FillColorTOP
{
get { return _fillcolorTOP; }
set { _fillcolorTOP = value; }
}

public PathAlign PathAlignTOP
{
get { return _pathalignTOP; }
set { _pathalignTOP = value; }
}

public int LetterSpacePercentage
{
get { return _letterspacepercentageTOP; }
set { _letterspacepercentageTOP = value; }
}

public Bitmap TextOnPathBitmap(PathData _pathdata, string _text, Font _font, Color _color, Color _fillcolor, int _letterspacepercentage)
{
_pathdataTOP = _pathdata;
_textTOP = _text;
_fontTOP = new Font(_font, _fontTOP.Style);
_colorTOP = _color;
_fillcolorTOP = _fillcolor;
_letterspacepercentageTOP = _letterspacepercentage;
return TextOnPathBitmap();
}

//核心方法
public Bitmap TextOnPathBitmap()
{
int i = 0;
PointF[] _TmpPoints = null;
PointF _TmpPoint = default(PointF);
PointF[] _Points = new PointF[25001];
//= oGP.PathPoints()
int _count = 0;