MVC下压缩输入的HTML内容

在MVC下如何压缩输出的HTML代码，替换HTML代码中的空白，换行符等字符？

1.首先要了解MVC是如何输出HTML代码到客户端的，先了解下Controller这个类，里面有很多方法，我们需要的主要有两个：OnActionExecuting和OnResultExecuted

2.新建一个基类，继承自：System.Web.Mvc.Controller,代码如下：

using System.IO;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.Mvc;
using System.Web.UI;

namespace WebApplication2.Controllers
{
/// <summary>
/// Base
/// </summary>
public class BaseController : Controller
{
#region Private

/// <summary>
/// HtmlTextWriter
/// </summary>
private HtmlTextWriter tw;
/// <summary>
/// StringWriter
/// </summary>
private StringWriter sw;
/// <summary>
/// StringBuilder
/// </summary>
private StringBuilder sb;
/// <summary>
/// HttpWriter
/// </summary>
private HttpWriter output;

#endregion

/// <summary>
/// 压缩html代码
/// </summary>
/// <param name="text">html代码</param>
/// <returns></returns>
private static string Compress(string text)
{
Regex reg = new Regex(@"\s*(</?[^\s/>]+[^>]*>)\s+(</?[^\s/>]+[^>]*>)\s*");
text = reg.Replace(text, m => m.Groups[1].Value + m.Groups[2].Value);

reg = new Regex(@"(?<=>)\s|\n|\t(?=<)");
text = reg.Replace(text, string.Empty);

return text;
}

/// <summary>
/// 在执行Action的时候，就把需要的Writer存起来
/// </summary>
/// <param name="filterContext">上下文</param>
protected override void OnActionExecuting(ActionExecutingContext filterContext)
{
sb = new StringBuilder();
sw = new StringWriter(sb);
tw = new HtmlTextWriter(sw);
output = (HttpWriter)filterContext.RequestContext.HttpContext.Response.Output;
filterContext.RequestContext.HttpContext.Response.Output = tw;

base.OnActionExecuting(filterContext);
}

/// <summary>
/// 在执行完成后，处理得到的HTML，并将他输出到前台
/// </summary>
/// <param name="filterContext"></param>
protected override void OnResultExecuted(ResultExecutedContext filterContext)
{
string response = Compress(sb.ToString());

output.Write(response);
}
}
}

2.需要压缩的页面控制器，集成这个BaseController，就可以了，运行后的网页源代码如下图：