c# - Does the DataTypeAttribute on a model do validation in MVC 3? -

the default asp.net mvc 3 internet application template includes following model:

public class registermodel {     [required]     [display(name = "user name")]     public string username { get; set; }      [required]     [datatype(datatype.emailaddress)]     [display(name = "email address")]     public string email { get; set; }      [required]     [stringlength(100, errormessage = "the {0} must @ least {2} characters long.", minimumlength = 6)]     [datatype(datatype.password)]     [display(name = "password")]     public string password { get; set; }      [datatype(datatype.password)]     [display(name = "confirm password")]     [compare("password", errormessage = "the password , confirmation password not match.")]     public string confirmpassword { get; set; } } 

in account/register action asking email address, seems can type in field , accept it.

does datatype(datatype.emailaddress) trigger validation? seems not. if doesn't validate type, purpose?

so far i'm aware, datatype attribute used formatting when use @html.editorfor(model => model.field).

examples model fields, cshtml , resulting html:

model fields:

[required] [datatype(datatype.text)] [display(name = "name")] public string name { get; set; }  [required] [datatype(datatype.password)] [display(name = "password")] public string password { get; set; }  [required] [datatype(datatype.multilinetext)] [display(name = "description")] public string desc { get; set; } 

cshtml:

<div class="form-section">     @html.labelfor(x => x.name)     @html.editorfor(x => x.name) </div>  <div class="form-section">     @html.labelfor(x => x.password)     @html.editorfor(x => x.password) </div>  <div class="form-section">     @html.labelfor(x => x.desc)     @html.editorfor(x => x.desc) </div> 

resulting html:

<div class="form-section">     <label for="name">name</label>     <input class="text-box single-line" id="name" name="name" type="text" value=""> </div> <div class="form-section">     <label for="password">password</label>     <input class="text-box single-line password" id="password" name="password" type="password" value=""> </div> <div class="form-section">     <label for="desc">description</label>     <textarea class="text-box multi-line" id="desc" name="desc"></textarea> </div> 

i know it's old post, maybe can shine light on situation others come way

edit:

there may validation attached these client side. not rely on these attributes actual validation, should done server side (client side user experience)