一些 HTML内容比较/文本差异比较 开源代码

1. DiffPlex - a .NET Diff Generator
http://diffplex.codeplex.com/

简介：

具体使用可以参考http://diffplex.codeplex.com/wikipage?title=library&referringTitle=Home

IDiffer是差异比较的核心类，提供了两个文本的低精度的大致比较

ISidebySideDiff：提供了高精度的比较以及可以用两栏对比显示差异

接口



Silverlight



Website



2.diffengine

简介：

功能强大，

缺点：文本每行不能超过1024个字符

DifferenceEngine.DiffList_TextFile sourceFile null;
DifferenceEngine.DiffList_TextFile destinationFile = null;

sourceFile = new DifferenceEngine.DiffList_TextFile("1.txt");
destinationFile = new DifferenceEngine.DiffList_TextFile("2.txt");

DifferenceEngine.DiffEngine engine = new DifferenceEngine.DiffEngine();
engine.ProcessDiff(sourceFile,destinationFile, DifferenceEngine.DiffEngineLevel.FastImperfect);
ArrayList diffLines = engine.DiffReport();
foreach (DifferenceEngine.DiffResultSpan span in diffLines)
{
switch (span.Status)
{
case ifferenceEngine.DiffResultSpanStatus.NoChange:
//没改变
break;
case DifferenceEngine.DiffResultSpanStatus.AddDestination:
//新增的
break;
case DifferenceEngine.DiffResultSpanStatus.DeleteSource:
//已删除的
break;
case DifferenceEngine.DiffResultSpanStatus.Replace:
//修改的
break;
default:
// 默认
break;

}

}
获取新增内容示例：

string str = ((DifferenceEngine.TextLine)(destinationFile.GetByIndex(span.DestIndex))).Line;

http://www.codeproject.com/KB/recipes/diffengine.aspx



3. htmldiff

简介：

HtmlDiff原本是Ruby版的HTML差异比较算法，后来有朋友做了个C#版本，特点是非常好用，过于简单
C#版： http://htmldiff.codeplex.com/

Ruby版： http://github.com/myobie/htmldiff
http://www.rohland.co.za/index.php/2009/10/31/csharp-html-diff-algorithm/



4.NDiffDiff: A Diff Implementation for Lines and Chars in Text File

简介：

提供Winform Demo

http://www.codeproject.com/KB/recipes/NBDiffDiff.aspx