Microsoft.Tools.WindowsInstaller.LoggingPoliciesConverter.ConvertFrom C# (CSharp) Méthode

        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            if (null != value && this.CanConvertFrom(context, value.GetType()))
            {
                var s = value as string;
                var mode = LoggingPolicies.None;

                // Attempt the simple coversion.
                if (TryParse(s, out mode))
                {
                    return mode;
                }
                else
                {
                    // Try parsing the logging command line options.
                    foreach (var c in s)
                    {
                        if (CharToModeMap.ContainsKey(c))
                        {
                            mode |= CharToModeMap[c];
                        }
                        else if ('+' == c)
                        {
                            throw new ArgumentException(Resources.Error_UnsupportedLoggingMode, "value");
                        }
                        else
                        {
                            var message = String.Format(CultureInfo.CurrentCulture, Resources.Error_InvalidLoggingMode, c);
                            throw new ArgumentException(message, "value");
                        }
                    }

                    return mode;
                }
            }

            return base.ConvertFrom(context, culture, value);
        }

        public void ConvertInvalidStringToLoggingModes()
        {
            var converter = new LoggingPoliciesConverter();
            Assert.IsTrue(converter.CanConvertFrom(typeof(string)));
            Assert.IsFalse(converter.CanConvertFrom(this.GetType()));

            // The append logging command line option is not supported in the registry policy.
            ExceptionAssert.Throws<ArgumentException>(() => { var mode = (LoggingPolicies)converter.ConvertFrom("*vx!+"); });

            // Bogus command line options.
            ExceptionAssert.Throws<ArgumentException>(() => { var mode = (LoggingPolicies)converter.ConvertFrom("jkl"); });
        }