关于WPF使用MultiConverter控制Button状态的详细介绍

需求描述
1.按钮的状态需要根据多个数据源的内容作出不同的组合判断
2.每个数据源的判断规则可定制
注：以下功能感觉只是简单粗暴的实现，如果您了解更优雅的解决方案，烦请告诉我下，感谢先！

按钮XAML

    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
    {
      string[] paramlist = ((string)parameter).Split('|');
      if (paramlist == null || paramlist.Length <= 0)
      {
        throw new ArgumentNullException("parameter");
      }
      int length = paramlist.Length;

      IList<bool> boollist = new List<bool>();

      for (int i = 0; i < paramlist.Length; i++)
      {
        switch (paramlist[i].ToLowerInvariant())
        {
          case "checknameexisted":
            boollist.Add(ValidationRuleHelper.Validate<InvalidCheckNameExistedValidationRule>(values[i]));
            break;
          case "directoryandfileexist":
            boollist.Add(ValidationRuleHelper.Validate<InvalidDirectoryAndFileExistValidationRule>(values[i]));
            break;
          case "greaterthanzerointeger":
            boollist.Add(ValidationRuleHelper.Validate<InvalidGreaterThanZeroIntegerValidationRule>(values[i]));
            break;
          case "numericnull":
            boollist.Add(ValidationRuleHelper.Validate<InvalidNumericNullValidationRule>(values[i]));
            break;
          case "stringlength":
            boollist.Add(ValidationRuleHelper.Validate<InvalidStringLengthValidationRule>(values[i]));
            break;
          case "stringnullorempty":
            boollist.Add(ValidationRuleHelper.Validate<InvalidStringNullOrEmptyValidationRule>(values[i]));
            break;
          case "ipaddress":
            boollist.Add(ValidationRuleHelper.Validate<InvalidIPAddressValidationRule>(values[i]));
            break;
          case "objectnull":
          default:
            boollist.Add(ValidationRuleHelper.Validate<InvalidObjectNullValidationRule>(values[i]));
            break;
        }
      }