A.创建Basic类型项目.
B.创建App_Code目录,在里面创建2个cshtml文件:
MyHelper.cshtml:
@helper MyTruncate(string input, int length)
{
<text>来自App_Code中的Helper->MyTruncate:</text>
if (input.Length <= length)
{
@input
}
else
{
@input.Substring(0, length) }
}
@helper MyAdd(int First, int Second)
{
int c = First + Second;
<i>来自App_Code中的Helper->MyAdd:</i>
@c.ToString() }
MyFunction.cshtml:
@functions{
public static IHtmlString MyAdd4(int First,int Second)
{
int c;
c = First + Second;
return new HtmlString("<i>来自App_Code中的自己定义函数MyAdd4:</i>"+c.ToString());
}
}C.创建HomeController.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc; namespace MvcCustomHelper.Controllers
{
public class HomeController : Controller
{
//
// GET: /Home/ public ActionResult Index()
{
return View();
}
public ActionResult InLineShow()
{ return View();
}
}
}
D.根文件夹下,新建一个MyHelpers文件夹,在里面,创建以下文件:
MyHtmlHelpers.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc; namespace MvcCustomHelper.MyHelpers
{
public static class MyHtmlHelpers
{
public static IHtmlString MyTruncate2(this HtmlHelper helper, string input, int length)
{
if (input.Length <= length)
{ return new HtmlString("来自MyHelpers中Html扩展方法的MyTruncate2:" + input);
}
else
{
return new HtmlString("来自MyHelpers中Html扩展方法的MyTruncate2:" + input.Substring(0, length));
}
}
public static IHtmlString MyAdd2(this HtmlHelper helper, int First, int Second)
{
int c;
c = First + Second;
return new HtmlString("来自MyHelpers中Html扩展方法的MyAdd2:" + c.ToString());
}
}
}
E.View以下创建对应的View文件:
Index.cshtml:
@{
ViewBag.Title = "Index";
}
<h1></h1>
@MyHelper.MyAdd(1,2)
<hr />
@MyHelper.MyTruncate("abcde",3)
<hr />
@MyFunction.MyAdd4(111,999)
<hr />
@using MvcCustomHelper.MyHelpers
@Html.MyTruncate2("bbbbbb", 4)
<hr />
@Html.MyAdd2(33, 55)
<hr />
@Html.ActionLink("内联方法和函数測试","InLineShow")InLineShow.cshtml:
@{
ViewBag.Title = "Index2";
}
<h2>内联帮助方法和函数測试</h2>
@helper MyTruncate3(string input, int length)
{
if (input.Length <= length)
{
<i>来自内联的Html扩展方法的MyTruncate3:</i>@input;
}
else
{
<i>来自内联的Html扩展方法的MyTruncate3:</i>@input.Substring(0, length)
}
}
@functions{
public IHtmlString MyAdd3(int First,int Second)
{
int c;
c = First + Second;
return new HtmlString("<i>来自内联的自己定义函数MyAdd3:</i>"+c.ToString());
}
}
<hr />
@MyTruncate3("vvvvvv",3)
<hr />
@MyAdd3(111,222)