我应该在哪里放置声明HTML佣工在ASP.NET MVC 3 [英] Where should I place Declarative HTML helpers in ASP.NET MVC 3

问题描述

我试图做一个声明HTML帮助中 ScottGu的剃刀规定帖子，但我没有多少运气。我试图把一个Helpers.cshtml文件与查看/佣工DateTimeHelper但它不会把它捡起来，所以我在APP_ code试图按<一个href=\"http://weblogs.asp.net/scottgu/archive/2010/10/06/announcing-nupack-asp-net-mvc-3-beta-and-webmatrix-beta-2.aspx#7625216\">the MVC 3 Beta版后。现在，它把它捡起，但是当我尝试使用它在一个文件中像这样：

@DateTimeHelper（DateTime.Now）

编译器抱怨DateTimeHelper不存在。

一些奇怪的事情：
如果我重命名文件DateTime.cshtml，我得到一个不同的错误，一些关于特定code在我的帮手。

有关完整起见，这里是辅助的code：

  @helper DateTimeHelper（日期时间T，布尔的longdate =真，布尔=的showTime真，布尔长期=真）{
    ＆LT;时间日期时间=@ t.ToUniversalTime（）'＆GT;
        @if（的longdate）{
            如果（的showTime）{
                如果（长期）{
                    @ t.ToLongDateString（）@ t.ToLongTimeString（）;
                }其他{
                    @ t.ToLongDateString（）@ t.ToShortTimeString（）;
                }
            }其他{
                @ t.ToLongDateString（）
            }
        }其他{
            如果（的showTime）{
                如果（长期）{
                    @ t.ToShortDateString（）@ t.ToLongTimeString（）;
                }其他{
                    @ t.ToShortDateString（）@ t.ToShortTimeString（）;
                }
            }其他{
                @ t.ToShortDateString（）
            }
        }
    ＆LT; /时间＆gt;
}
 

助手在这样的特定视图中使用：

  @model动态＆LT; D​​IV＆GT;
    ＆所述p为H.;当前时间是@DateTimeHelper（DateTime.Now）LT; / P＆GT;
＆LT; / DIV＆GT;
 

解决方案

要使用剃刀的@helper功能，您需要将CSHTML文件放置在您的应用程序的APP_ code文件夹中。有一个在ASP.NET MVC 3 ScottGu的博客文章没有查看/助手的文件夹被写入之前的功能已全面实施，而一些票据也有不完全准确了。

要调用@helper你写，你必须包括文件名，以及它里面的助手的名字。例如，如果你有这样的帮手：

〜/ APP_ code / MyHelper.cshtml

和此内容：

  @helper ShowStuff（字符串的东西）{
    ＆所述p为H.; @东西＆下; / P＆GT;
}
 

然后调用它像这样：

  @ MyHelper.ShowStuff（一些东西！）
 

I'm trying to make a declarative HTML Helper as specified in ScottGu's Razor post, but I'm not having much luck. I tried putting a Helpers.cshtml file with a DateTimeHelper in Views/Helpers but it wouldn't pick it up, so I tried in App_Code as per the MVC 3 Beta post. Now it picks it up, but when I try to use it in a file like so:

@DateTimeHelper(DateTime.Now)

The compiler complains that DateTimeHelper doesn't exist.

Some weird things: If I rename the file to DateTime.cshtml, I get a different error, something about the particular code in my helper.

For completeness' sake, here's the helper's code:

@helper DateTimeHelper(DateTime t, bool longDate = true, bool showTime = true, bool longTime = true) {
    <time datetime='@t.ToUniversalTime()'>
        @if(longDate) {
            if(showTime) {
                if(longTime) {
                    @t.ToLongDateString() @t.ToLongTimeString();
                } else {
                    @t.ToLongDateString() @t.ToShortTimeString();
                }
            } else {
                @t.ToLongDateString()
            }
        } else {
            if(showTime) {
                if(longTime) {
                    @t.ToShortDateString() @t.ToLongTimeString();
                } else {
                    @t.ToShortDateString() @t.ToShortTimeString();
                }
            } else {
                @t.ToShortDateString()
            }
        }
    </time>
}

The helper is used in a certain view like this:

@model dynamic

<div>
    <p> The current time is @DateTimeHelper(DateTime.Now)</p>
</div>

解决方案

To use the "@helper" feature in Razor you need to place the CSHTML file in the App_Code folder of your app. There is no "Views/Helpers" folder in ASP.NET MVC 3. ScottGu's blog post was written before the feature was fully implemented, and some of the notes there are not entirely accurate anymore.

To call the "@helper" that you wrote you have to include both the filename as well as the name of the helper inside it. For example, if you have this helper:

~/App_Code/MyHelper.cshtml

And this content:

@helper ShowStuff(string stuff) {
    <p>@stuff</p>
}

Then you call it like so:

@MyHelper.ShowStuff("some stuff!")

这篇关于我应该在哪里放置声明HTML佣工在ASP.NET MVC 3的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！