C# InstallationContext.Error方法代码示例

        private void RunInstallCommands(InstallationContext installationContext, IEnumerable<DatabaseCommandInfo> commands)
        {
            // create log event that will be used to render all layouts
            LogEventInfo logEvent = installationContext.CreateLogEvent();

            try
            {
                foreach (var commandInfo in commands)
                {
                    string cs;

                    if (commandInfo.ConnectionString != null)
                    {
                        // if there is connection string specified on the command info, use it
                        cs = commandInfo.ConnectionString.Render(logEvent);
                    }
                    else if (this.InstallConnectionString != null)
                    {
                        // next, try InstallConnectionString
                        cs = this.InstallConnectionString.Render(logEvent);
                    }
                    else
                    {
                        // if it's not defined, fall back to regular connection string
                        cs = this.BuildConnectionString(logEvent);
                    }

                    this.EnsureConnectionOpen(cs);

                    var command = this.activeConnection.CreateCommand();
                    command.CommandType = commandInfo.CommandType;
                    command.CommandText = commandInfo.Text.Render(logEvent);

                    try
                    {
                        installationContext.Trace("Executing {0} '{1}'", command.CommandType, command.CommandText);
                        command.ExecuteNonQuery();
                    }
                    catch (Exception exception)
                    {
                        if (exception.MustBeRethrown())
                        {
                            throw;
                        }

                        if (commandInfo.IgnoreFailures || installationContext.IgnoreFailures)
                        {
                            installationContext.Warning(exception.Message);
                        }
                        else
                        {
                            installationContext.Error(exception.Message);
                            throw;
                        }
                    }
                }
            }
            finally 
            {
                this.CloseConnection();
            }
        }

        /// <summary>
        /// Performs installation which requires administrative permissions.
        /// </summary>
        /// <param name="installationContext">The installation context.</param>
        public void Install(InstallationContext installationContext)
        {
            // categories must be installed together, so we must find all PerfCounter targets in the configuration file
            var countersByCategory = this.LoggingConfiguration.AllTargets.OfType<PerformanceCounterTarget>().BucketSort(c => c.CategoryName);
            string categoryName = this.CategoryName;

            if (countersByCategory[categoryName].Any(c => c.created))
            {
                installationContext.Trace("Category '{0}' has already been installed.", categoryName);
                return;
            }

            try
            {
                PerformanceCounterCategoryType categoryType;
                CounterCreationDataCollection ccds = GetCounterCreationDataCollection(countersByCategory[this.CategoryName], out categoryType);

                if (PerformanceCounterCategory.Exists(categoryName))
                {
                    installationContext.Debug("Deleting category '{0}'", categoryName);
                    PerformanceCounterCategory.Delete(categoryName);
                }

                installationContext.Debug("Creating category '{0}' with {1} counter(s) (Type: {2})", categoryName, ccds.Count, categoryType);
                foreach (CounterCreationData c in ccds)
                {
                    installationContext.Trace("  Counter: '{0}' Type: ({1}) Help: {2}", c.CounterName, c.CounterType, c.CounterHelp);
                }

                PerformanceCounterCategory.Create(categoryName, "Category created by NLog", categoryType, ccds);
            }
            catch (Exception exception)
            {
                if (exception.MustBeRethrown())
                {
                    throw;
                }

                if (installationContext.IgnoreFailures)
                {
                    installationContext.Warning("Error creating category '{0}': {1}", categoryName, exception.Message);
                }
                else
                {
                    installationContext.Error("Error creating category '{0}': {1}", categoryName, exception.Message);
                    throw;
                }
            }
            finally
            {
                foreach (var t in countersByCategory[categoryName])
                {
                    t.created = true;
                }
            }
        }

        /// <summary>
        /// Uninstalls target-specific objects from current system.
        /// </summary>
        /// <param name="installationContext">The installation context.</param>
        /// <remarks>
        /// Uninstallation typically runs with administrative permissions.
        /// </remarks>
        public void Uninstall(InstallationContext installationContext)
        {
            if (installationContext == null)
            {
                throw new ArgumentNullException("installationContext");
            }

            this.InitializeAll();

            foreach (IInstallable installable in EnumerableHelpers.OfType<IInstallable>(this.configItems))
            {
                installationContext.Info("Uninstalling '{0}'", installable);

                try
                {
                    installable.Uninstall(installationContext);
                    installationContext.Info("Finished uninstalling '{0}'.", installable);
                }
                catch (Exception exception)
                {
                    if (exception.MustBeRethrown())
                    {
                        throw;
                    }

                    installationContext.Error("Uninstallation of '{0}' failed: {1}.", installable, exception);
                }
            }
        }