C# extend MVC maxlengthattribute

Question

I have already searched here to answer my question, and the closest I ever got was that post, but it still does not completely clarify the matter to me, so I will ask.

What I need is extending maxlengthattribute in the way that when I set it inside the C# file,

[MaxLength(50)]
[Display(Name = "Project Description")]
public string ProjectDescription { get; set; }

the attribute "maxlength" will be added inside the tag and will be <\stuff stuff maxlength = "50">

I have initially implemented it as writing html-helper to modify TextBoxFor, however, this is out of option since project is tightly intertwined with .js, and inserting renamed method will break a code, which will be a pain to fix.

The answer I referred above provides the closest explanation of what I need, but it looks like I will need to declare attributes (like inside ( ) in function), which I do not see there.

At this point I can either try modifying JS file on the server-side, or extending maxlengthattribute. Thus far, latter is preferable for me, thus I would like to ask how to properly extend it inside the c# file.

Thank you very much in advance!

MIght be off, but try use [StringLength(50, ErrorMessage = "ProjectDescription cannot be longer than 50 characters.")] — aggaton, Jun 08 '16 at 19:25
@aggaton I have tried that already, however, what I need is maxlength, and physically preventing any characters beyond limit. — Vadzim Savenok, Jun 08 '16 at 19:28
@riteshmeher Can you please help with the step 3 from the solution by Randhir? I do not have such file in views/shared, so I am not sure where to place it. Thank you in advance! — Vadzim Savenok, Jun 08 '16 at 21:49

score 1 · Accepted Answer · edited May 23 '17 at 12:31

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You can write a custom dataannotation provider. The max length attribute will get added to the control. Refer this link

edited May 23 '17 at 12:31

Community

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answered Jun 08 '16 at 19:30

riteshmeher

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I actually found it just before you posted it. So I will use it as an answer-reference. Thank you. – Vadzim Savenok Jun 08 '16 at 19:32
you can create folders and create ViewUserControl called string.ascx under Views\Shared\EditorTemplates – riteshmeher Jun 08 '16 at 22:15

C# extend MVC maxlengthattribute

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