Is there an MVC function that converts "item[0]" to "item_0_"

Question

I'm using MVC3 with Razor and I've noticed that Html helper functions generate html tags that have their names attributes like I asked them to, but have specific format for id attribute. If I try to generate a checkbox and pass "item[0]" as a name parameter, I'll get a checkbox with "item[0]" as name but "item_0_" for id.

I'm guessing there's a good reason for that, and I'm guessing that there's a function that does this string to string conversion? Do you know which function does that? I need to do this type of conversion in my code.

score 2 · Accepted Answer · answered Mar 24 '11 at 18:44

2

I think you are looking for:

GetFullHtmlFieldId

http://msdn.microsoft.com/en-us/library/system.web.mvc.templateinfo.getfullhtmlfieldid.aspx

answered Mar 24 '11 at 18:44

B Z

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score 0 · Answer 2 · edited May 23 '17 at 11:47

0

This probably happens because a [ is not valid in an html id. Such a funciton would be very easy to write yourself though:

public string SanitizeID(string dirtyID)
{
     return dirtyID
         .Replace("[", "_")
         .Replace("]", "_")
         .Replace(".", "_");

     // add any other replace as needed
}

EDIT
This answer might point you in the right direction: Preventing ASP.NET MVC from Replacing period with underscore in Html Helper IDs

EDIT 2
This post of Scott Hanselman appears to hint that such behaviour is defined in the DefaultModelBinder.cs class. I cannot check the ASP.NET MVC sources now, but you might want to take a look there...

edited May 23 '17 at 11:47

Community

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answered Mar 24 '11 at 13:42

Sergi Papaseit

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That's what I did, but I's rather use the system function, since I'm not sure which other replacements I need to do. – durad Mar 24 '11 at 14:01
@77v - I've added a link to an answer that might get you closer to what you want... although not completely there, I'll admit... – Sergi Papaseit Mar 24 '11 at 14:27

score 0 · Answer 3 · answered Mar 24 '11 at 13:48

0

This may be in the Control class in asp.net - have a look there, not MVC

answered Mar 24 '11 at 13:48

Adam Tuliper

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score 0 · Answer 4 · answered Mar 24 '11 at 14:14

Taken from the MSDN page for Control.ID Property:

Note
Only combinations of alphanumeric characters and the underscore character ( _ ) are valid values for this property. Including spaces or other invalid characters will cause an ASP.NET page parser error.

So it looks like you should be ok using something like:

string id = ...;
id = Regex.Replace(id, @"\W", "_");

But yes it would be nice to find a system method.

Is there an MVC function that converts "item[0]" to "item_0_"

4 Answers4