c#做对比软件

1. DiffPlex - a .NET Diff Generator
   http://diffplex.codeplex.com/SourceControl/changeset/view/052fd342999b
   原网站dll下载 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