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BOOK: Beginning ASP.NET Web Pages with WebMatrix
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Old August 26th, 2013, 08:53 PM
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Default Chapter 5 Helpers

Hi - Love the book so far, found a couple of errors here and there but noticed that they were addressed in the forums.

I may be pedantic but I am not sure I understand the reason for this code:

Code:
@helper Selected(string option, string value){
if(HttpContext.Current.Request[option] != null){
var values = HttpContext.Current.Request[option].Split(',');
if(values.Contains(value)){
<text>selected=\”selected\”</text>
}
}
}
What's the point of selected=\"selected\" there?
When I look into source code I see something like
Code:
<option         selected=\"selected\">
To my knowledge (and that means days from diving into HTML 15+ yrs ago) <option selected> is the right form according to W3C.

So I used the following instead
Code:
        // This seem to work just fine
        //   <text>selected</text> 

        // and this works as well
            @:selected
End result is
<option selected>

Pretty much the same deal with Checked helper.

Am I missing something?

Thanks!
 
Old August 26th, 2013, 09:20 PM
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Default

Hi there,

No, you're not missing something. In the old days, selected was just fine. Then in HTML 4, that required all attributes to have a value, selected="selected" was required. However, now with HTML 5, we're back to empty attributes again, so just selected works fine and is valid HTML.

The backslashes to escape the double quotes aren't needed (and are actually a bug in this code). Normally, inside a C# string, you need them or else the double quote would terminate the string prematurely. However, in this example, with the text being inside a pair of <text> tags, you can use double quotes as is without the need to escape them.

So, your solution works perfectly well, as would selected="selected" (since a value on the attribute is still allowed).

Hope this helps,

Imar
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Author of Beginning ASP.NET 4.5 : in C# and VB, Beginning ASP.NET Web Pages with WebMatrix
and Beginning ASP.NET 4 : in C# and VB.
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Old August 27th, 2013, 07:16 PM
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Default

Makes perfect sense, thanks!





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