for some reason my program don't find my Custom Validation Rule für my TextBox. I define the namespace where my Validation Rule is located
xmlns:valRule="clr-namespace:MovieDB.UI.Validation"
and i bind my rule to the TextBox
<TextBox x:Name="textBoxName" Height="23" Margin="59,13,10,0" TextWrapping="Wrap" VerticalAlignment="Top">
<TextBox.Text>
<Binding Path="archiveName">
<Binding.ValidationRules>
<valRule:ArchiveNameValidationRule />
</Binding.ValidationRules>
</Binding>
</TextBox.Text>
</TextBox>
I define my Rule here
namespace MovieDB.UI.Validation
{
public class ArchiveNameValidationRule : ValidationRule
{
private static char[] FORBIDEN_CHARS = new char[] { '*', '&', '#', '/', ' ', '\\', '+', '=', '?', ')', '(', ']', '[', '}',
'{', '%', '$', '§', '"', '!', 'ö', 'ü' ,'ä', 'Ä', 'Ö', 'Ü', ':', '.', ';', ',', };
public override ValidationResult Validate(object value, CultureInfo cultureInfo)
{
String val = value as String;
bool result = val.IndexOfAny(FORBIDEN_CHARS) != -1;
ValidationResult vr = new ValidationResult(result, "Es sind nur Zahlen, Buchstaben und Unterstriche erlaubt.");
return vr;
}
}
}
I'm always getting the error:
The tag ArchiveNameValidationRule does not exist in namespace 'clr-namespace:MovieDB.UI.Validation'.
even if i locate the rule in the same namespace as the Window i have no success.
UPDATE: If i change the the Target Framework my new validation rule is found after the project is reopend.