System.Data.Common.ADP.InvalidConnectionOptionValue C# (CSharp) Méthode

        static internal Exception InvalidConnectionOptionValue(string key)
        {
            return InvalidConnectionOptionValue(key, null);
        }
        static internal Exception InvalidConnectionOptionValueLength(string key, int limit)

        /// <summary>
        /// Convert the provided value to a SqlConnectionColumnEncryptionSetting.
        /// </summary>
        /// <param name="keyword"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        internal static SqlConnectionColumnEncryptionSetting ConvertToColumnEncryptionSetting(string keyword, object value)
        {
            if (null == value)
            {
                return(DbConnectionStringDefaults.ColumnEncryptionSetting);
            }

            string sValue = (value as string);
            SqlConnectionColumnEncryptionSetting result;

            if (null != sValue)
            {
                if (TryConvertToColumnEncryptionSetting(sValue, out result))
                {
                    return(result);
                }

                // try again after remove leading & trailing whitespaces.
                sValue = sValue.Trim();
                if (TryConvertToColumnEncryptionSetting(sValue, out result))
                {
                    return(result);
                }

                // string values must be valid
                throw ADP.InvalidConnectionOptionValue(keyword);
            }
            else
            {
                // the value is not string, try other options
                SqlConnectionColumnEncryptionSetting eValue;

                if (value is SqlConnectionColumnEncryptionSetting)
                {
                    // quick path for the most common case
                    eValue = (SqlConnectionColumnEncryptionSetting)value;
                }
                else if (value.GetType().IsEnum)
                {
                    // explicitly block scenarios in which user tries to use wrong enum types, like:
                    // builder["SqlConnectionColumnEncryptionSetting"] = EnvironmentVariableTarget.Process;
                    // workaround: explicitly cast non-SqlConnectionColumnEncryptionSetting enums to int
                    throw ADP.ConvertFailed(value.GetType(), typeof(SqlConnectionColumnEncryptionSetting), null);
                }
                else
                {
                    try {
                        // Enum.ToObject allows only integral and enum values (enums are blocked above), rasing ArgumentException for the rest
                        eValue = (SqlConnectionColumnEncryptionSetting)Enum.ToObject(typeof(SqlConnectionColumnEncryptionSetting), value);
                    }
                    catch (ArgumentException e) {
                        // to be consistent with the messages we send in case of wrong type usage, replace
                        // the error with our exception, and keep the original one as inner one for troubleshooting
                        throw ADP.ConvertFailed(value.GetType(), typeof(SqlConnectionColumnEncryptionSetting), e);
                    }
                }

                // ensure value is in valid range
                if (IsValidColumnEncryptionSetting(eValue))
                {
                    return(eValue);
                }
                else
                {
                    throw ADP.InvalidEnumerationValue(typeof(SqlConnectionColumnEncryptionSetting), (int)eValue);
                }
            }
        }