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PORegular Expression in MVC of c# to match characters
 

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  1. PORegular Expression in MVC of c# to match characters
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    <p>I am using a regular expression to match some characters like <code>ç"·$%&amp;/()=?</code>, etc.</p> <p>I am testing the regular expression in the web page </p> <pre><code>http://www.softlion.com/webTools/RegExpTest/default.aspx </code></pre> <p>and it is working but when I use the regular expression in my model of MVC it is not working and always I display the message of error. </p> <p>The instruction used in c# is:</p> <pre><code>[RegularExpression(@"[ç\"·$%&amp;/()=?]$", ErrorMessage="some message")] </code></pre> <p>ç\"·$%&amp;/()=?]$ are disallowed characters</p> <p>I still have the problem, and I don't understand why it is not working</p> <p>I always see the error message if I write something like: <code>ABCDEF</code> (for me it is the right characters) or <code>ABCDçEF=GHIJ</code> (incorrect)</p> <p>In the model I changed RegularExpression like a Custom Attribute. In the property of the model I have:</p> <p>[CaracteresNoPermitidosAttribute(ErrorMessage="test 123")] public string RazonSocial { get; set; }</p> <p>And the Attribute class is:</p> <pre><code>public class CaracteresNoPermitidosAttribute : RegularExpressionAttribute { public CaracteresNoPermitidosAttribute() : base(GetRegex()) { } private static string GetRegex() { // I take the data from the table to get the disallowed characters var lista = (List&lt;Caracterko&gt;) new CaracterkoProxy().ObtenerTodos(); // I transform the list to string var str = string.Join("", from x in lista where x.Activo select x.Caracter.ToString()); return @"(?![" + str + "])$"; } } </code></pre> <p>I used the example gave by Tim as regular expression</p>
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    1. UStereško
    1. USdavid
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    1. COWhy is there a `$`? That anchors your regex to the end of the string, _i.e._ only matches those characters at the end of the string. Remove that `$`.
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      1. PORegular Expression in MVC of c# to match characters
      1. USAndrew Cheong
    2. CObecause it is the collection of characters I have in my table of not allowed characters
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      1. PORegular Expression in MVC of c# to match characters
      1. USdavid
    3. COThen put it _inside_ the square brackets: `@"[ç\"·$%&/()=?$]"`.
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      1. PORegular Expression in MVC of c# to match characters
      1. USAndrew Cheong
 

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