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Task.Log, propriété

Mise à jour : novembre 2007

Obtient une instance d'une classe TaskLoggingHelper contenant des méthodes d'enregistrement des tâches.

Espace de noms :  Microsoft.Build.Utilities
Assembly :  Microsoft.Build.Utilities (dans Microsoft.Build.Utilities.dll)

public TaskLoggingHelper Log { get; }
/** @property */
public TaskLoggingHelper get_Log()

public function get Log () : TaskLoggingHelper

Valeur de propriété

Type : Microsoft.Build.Utilities.TaskLoggingHelper

Objet d'assistance à l'enregistrement.

L'exemple suivant affiche le code pour une tâche qui crée un ou plusieurs répertoires.

using System;
using System.IO;
using System.Security;
using System.Collections;
using Microsoft.Build.Framework;
using Microsoft.Build.Utilities;

namespace Microsoft.Build.Tasks
	 * Class: MakeDir
	 * An MSBuild task that creates one or more directories.
	public class MakeDir : Task
	    // The Required attribute indicates the following to MSBuild:
	    //	     - if the parameter is a scalar type, and it is not supplied, fail the build immediately
	    //	     - if the parameter is an array type, and it is not supplied, pass in an empty array
	    // In this case the parameter is an array type, so if a project fails to pass in a value for the 
            // Directories parameter, the task will get invoked, but this implementation will do nothing,
            // because the array will be empty.
            // Directories to create.
		public ITaskItem[] Directories
				return directories;

				directories = value;

		// The Output attribute indicates to MSBuild that the value of this property can be gathered after the
		// task has returned from Execute(), if the project has an <Output> tag under this task's element for 
		// this property.
		// A project may need the subset of the inputs that were actually created, so make that available here.
		public ITaskItem[] DirectoriesCreated
				return directoriesCreated;

		private ITaskItem[] directories;
		private ITaskItem[] directoriesCreated;

		/// <summary>
		/// Execute is part of the Microsoft.Build.Framework.ITask interface.
		/// When it's called, any input parameters have already been set on the task's properties.
		/// It returns true or false to indicate success or failure.
		/// </summary>
		public override bool Execute()
			ArrayList items = new ArrayList();
			foreach (ITaskItem directory in Directories)
				// ItemSpec holds the filename or path of an Item
				if (directory.ItemSpec.Length > 0)
						// Only log a message if we actually need to create the folder
						if (!Directory.Exists(directory.ItemSpec))
							Log.LogMessage(MessageImportance.Normal, "Creating directory " + directory.ItemSpec);

						// Add to the list of created directories
					// If a directory fails to get created, log an error, but proceed with the remaining 
					// directories.
					catch (Exception ex)
						if (ex is IOException
							|| ex is UnauthorizedAccessException
							|| ex is PathTooLongException
							|| ex is DirectoryNotFoundException
							|| ex is SecurityException)
							Log.LogError("Error trying to create directory " + directory.ItemSpec + ". " + ex.Message);

			// Populate the "DirectoriesCreated" output items.
			directoriesCreated = (ITaskItem[])items.ToArray(typeof(ITaskItem));

			// Log.HasLoggedErrors is true if the task logged any errors -- even if they were logged 
			// from a task's constructor or property setter. As long as this task is written to always log an error
			// when it fails, we can reliably return HasLoggedErrors.
			return !Log.HasLoggedErrors;

Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professionnel Édition x64, Windows XP Starter Edition, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

Le .NET Framework et le .NET Compact Framework ne prennent pas en charge toutes les versions de chaque plateforme. Pour obtenir la liste des versions prises en charge, consultez Configuration requise du .NET Framework.

.NET Framework

Pris en charge dans : 3.5, 3.0, 2.0