CODEWITHSUNDEEP
asp.netsyntaxasp.net-mvc-3razor
Smarty
Smarty

Reputation: 1579

ASP.NET MVC 3 Razor Syntax question

This question appear when I worked with partial view (MVC3/Razor), but I am sure - it's clear Razor Syntax question, not related direct to partial view. So - I have partial view Menu.cshtml with full markup as:

@model IEnumerable<SportsStore.WebUI.Models.NavLink>
@foreach(var link in Model)
{
    @Html.RouteLink(link.Text, link.RouteValues);
}

No problem - "parent" view call it @{Html.RenderAction("Menu", "Nav");} and all work as magic. But, if I will edit the Menu.cshtml as:

@model IEnumerable<SportsStore.WebUI.Models.NavLink>
@foreach(var link in Model)
{
    Html.RouteLink(link.Text, link.RouteValues);
}

(see - NO '@' before Html.RouteLink!) all just broke: now @{Html.RenderAction("Menu", "Nav");} output is totally empty, no one HTML tag.

Want to know - what is the difference between two piece of code? I assume @ before foreach also automatically "drop into" and apply to Html.RouteLink as well? So - am I wrong?

Upvotes: 2

Views: 1290

Answers (2)

SLaks
SLaks

Reputation: 888185

The Html.RouteLink method simply returns an IHtmlString containing a link; it doesn't do anything else.

When you write @Html.RouteLink(...), you're printing this link to the page.
When you write Html.RouteLink(...), you're calling the method without doing anything with the link.
Thus, nothing happens.

Upvotes: 3

Kasper Holdum
Kasper Holdum

Reputation: 13373

The @ before the statement causes it to be written to the output stream. When you remove it, all you are doing is invoking a method call on the Html object.

The @-operator's purpose is two-fold. It can either be used to output an expression to the response stream like you see it used in the first example. The other function is to start a code block. You can see this second behavior used in your code example with the @foreach(var link in Model)

Upvotes: 3

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