using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;

namespace Record
{
public partial class myLabel : System.Windows.Forms.Label
{
int lineDistance = 5;//行间距

public int LineDistance
{
get { return lineDistance; }
set { lineDistance = value; }
}
public myLabel()
{
InitializeComponent();
}

public myLabel(IContainer container)
{
container.Add(this);
InitializeComponent();
}
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
try
{
Graphics g = e.Graphics;
String drawString = this.Text;
Font drawFont = this.Font;
SolidBrush drawBrush = new SolidBrush(this.ForeColor);
SizeF textSize = g.MeasureString(this.Text, this.Font);//文本的矩形区域大小
int lineCount = Convert.ToInt16(textSize.Width / this.Width) + 1;//计算行数

this.Height = Convert.ToInt16((textSize.Height + lineDistance) * lineCount);//计算调整后的高度
this.AutoSize = false;
float x = 0.0F;
StringFormat drawFormat = new StringFormat();
int step = 1;
lineCount = drawString.Length;//行数不超过总字符数目
for (int i = 0; i < lineCount; i++)
{
//计算每行容纳的字符数目
int charCount;
for (charCount = 0; charCount < drawString.Length; charCount++)
{
string subN = drawString.Substring(0, charCount);
string subN1 = drawString.Substring(0, charCount + 1);
if (g.MeasureString(subN, this.Font).Width <= this.Width
&& g.MeasureString(subN1, this.Font).Width > this.Width)
{
step = charCount;
break;
}
}
string subStr;
if (charCount == drawString.Length)//最后一行文本
{
subStr = drawString;
e.Graphics.DrawString(subStr, drawFont, drawBrush, x, Convert.ToInt16(textSize.Height * i) + i * LineDistance, drawFormat);
break;
}
else
{
subStr = drawString.Substring(0, step);//当前行文本
drawString = drawString.Substring(step);//剩余文本
e.Graphics.DrawString(subStr, drawFont, drawBrush, x, Convert.ToInt16(textSize.Height * i) + i * LineDistance, drawFormat);
}
}
}
catch
{ }
}
}
}

本文转自94cool博客园博客，原文链接：http://www.cnblogs.com/94cool/archive/2009/12/18/1626997.html，如需转载请自行联系原作者