Having just started with MVC 2 I notice that in their starter template they use <pre class="prettyprint"><code><%: Html.ActionLink("Home", "Index", "Home")%> </code></pre> and I was sure that in MVC 1 it was <pre class="prettyprint"><code><%= Html.ActionLink("Home", "Index", "Home")%> </code></pre> Are they the same thing? If so, why the change from equal sign to colon.

the colon syntax means you'll be html encoded automatically: http://haacked.com/archive/2009/09/25/html-encoding-code-nuggets.aspx They couldn't just html encode all the existing <code><%=</code> blocks, because things that are already properly encoded (which is hopefully most of the projects out there) would look strange.

Are <%: and <%= the same thing as embbed code (expression) blocks

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Razor provides expression encoding to avoid malicious code and security risks. In case, if user enters a malicious script as input, razor engine encode the script and render as HTML output.

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The @model directive allows access to the list of movies that the controller passed to the view by using a Model object that's strongly typed. For example, in the Index.cshtml view, the code loops through the movies with a foreach statement over the strongly typed Model object: CSHTML Copy.

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What is Razor? Razor is a markup syntax that lets you embed server-based code (Visual Basic and C#) into web pages. Server-based code can create dynamic web content on the fly, while a web page is written to the browser.

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asp.net-mvc-2

Having just started with MVC 2 I notice that in their starter template they use

<%: Html.ActionLink("Home", "Index", "Home")%>

and I was sure that in MVC 1 it was

<%= Html.ActionLink("Home", "Index", "Home")%>

Are they the same thing? If so, why the change from equal sign to colon.

241

asked Apr 20 '10 15:04

Ralph Shillington

2 Answers

the colon syntax means you'll be html encoded automatically: http://haacked.com/archive/2009/09/25/html-encoding-code-nuggets.aspx

They couldn't just html encode all the existing <%= blocks, because things that are already properly encoded (which is hopefully most of the projects out there) would look strange.

answered Sep 27 '22 22:09

Rob Fonseca-Ensor

<%= is used for writing to the output buffer.

<%: is used for writing to the output buffer, after HTML Encoding the content... Unless the IHtmlString Interface has been implemented on the returned object.

Scott Guthrie has an excellent post on this topic: http://weblogs.asp.net/scottgu/archive/2010/04/06/new-lt-gt-syntax-for-html-encoding-output-in-asp-net-4-and-asp-net-mvc-2.aspx

If the output has already been escaped, double encoding can be prevented by implementing the IHtmlString Interface on the returned object. http://msdn.microsoft.com/en-us/library/system.web.ihtmlstring.aspx

answered Sep 28 '22 00:09

gahooa

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