LinqPad有个非常强大的Dump函数。这篇讲解一下如何将Dump函数应用在.Net MVC Web开发中。
先看效果：
一、用.Net Reflector反编译LinqPad.exe，找出Dump函数的定义：
经过反编译发现，Dump函数调用了LINQPad.ObjectGraph.Formatters.XhtmlWriter类中FormatObject函数，把对象转成了Html。
二、反射调用FormatObject函数：
由于FormatObject函数是protect类型，不能直接调用，只能反射了。
三、在.Net MVC中使用Dump：
BigDump.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc;
using System.Reflection;
using System.IO;
using System.Text; namespace System.Web
{
public static class BigDump
{
private static MethodInfo dumpMethodInfo = null;
private static object xhtmlWriterInstance = null;
private static void Init()
{
if (dumpMethodInfo == null || xhtmlWriterInstance == null)
{
var asm = Assembly.LoadFile(HttpContext.Current.Server.MapPath("~/Lib/LINQPad.exe"));
Type t1 = asm.GetType("LINQPad.ObjectGraph.Formatters.XhtmlWriter");
ConstructorInfo t1Constructor = t1.GetConstructor(new Type[] { typeof(TextWriter), typeof(bool) });
xhtmlWriterInstance = t1Constructor.Invoke(new Object[] { new StringWriter(new StringBuilder()), false });
dumpMethodInfo = t1.GetMethod("FormatObject", BindingFlags.Instance | BindingFlags.NonPublic);
}
}
public static MvcHtmlString Render<T>(this T o, string description = "", int? depth = )
{
Init();
var result = dumpMethodInfo.Invoke(xhtmlWriterInstance, new Object[] { o, description, depth, new TimeSpan() });
return new MvcHtmlString(result as string);
} public static List<MvcHtmlString> Stack { get; set; }
static BigDump()
{
Stack = new List<MvcHtmlString>();
}
public static T Dump<T>(this T o, string description = "", int? depth = )
{
Stack.Add(o.Render(description, depth));
return o;
}
public static void Clear()
{
Stack = new List<MvcHtmlString>();
}
public static MvcHtmlString Flush()
{
var html = new MvcHtmlString(string.Join("\r\n", Stack.Select(r => r.ToHtmlString()).ToArray()));
Clear();
return html; }
}
}