StringValidator
Provides validation of a string.
namespace System.Configuration
{
public class StringValidator : ConfigurationValidatorBase
{
private readonly string _invalidChars;
private readonly int _maxLength;
private readonly int _minLength;
public StringValidator(int minLength)
: this(minLength, 2147483647, null)
{
}
public StringValidator(int minLength, int maxLength)
: this(minLength, maxLength, null)
{
}
public StringValidator(int minLength, int maxLength, string invalidCharacters)
{
_minLength = minLength;
_maxLength = maxLength;
_invalidChars = invalidCharacters;
}
public override bool CanValidate(Type type)
{
return type == typeof(string);
}
public override void Validate(object value)
{
ValidatorUtils.HelperParamValidation(value, typeof(string));
string text = value as string;
int num = text?.Length ?? 0;
if (num < _minLength)
throw new ArgumentException(System.SR.Format(System.SR.Validator_string_min_length, _minLength));
if (num > _maxLength)
throw new ArgumentException(System.SR.Format(System.SR.Validator_string_max_length, _maxLength));
if (num > 0 && !string.IsNullOrEmpty(_invalidChars)) {
char[] array = new char[_invalidChars.Length];
_invalidChars.CopyTo(0, array, 0, _invalidChars.Length);
if (text.IndexOfAny(array) != -1)
throw new ArgumentException(System.SR.Format(System.SR.Validator_string_invalid_chars, _invalidChars));
}
}
}
}