added file log handler

SimpleLog/LogHandlers/FileLogHandler.cs

@@ -0,0 +1,140 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.IO;
+
+namespace SimpleLog.LogHandlers {
+	public class FileLogHandler : ILogHandler {
+
+		protected IMessageHandler messageHandler;
+		protected LogLevel? logLevel;
+
+		protected string logDirectory;
+		protected string filePrefix;
+		protected string fileSuffix;
+
+		#region Constructors
+		/// <summary>
+		/// Constructs a new FileLogHandler with the default
+		/// log directory (temp directory), prefix (log) and
+		/// suffix (.log)
+		/// </summary>
+		public FileLogHandler() : this(Path.GetTempPath(), "log", ".log") {
+
+		}
+
+		/// <summary>
+		/// Constructs a new FileLogHandler
+		/// </summary>
+		/// <param name="dir">The directory to log to</param>
+		/// <param name="prefix">The file prefix</param>
+		/// <param name="suffix">The file suffix (e.g. ".log")</param>
+		public FileLogHandler(string dir, string prefix, string suffix) {
+			this.messageHandler = new DefaultMessageHandler();
+			this.logLevel = null;
+			this.logDirectory = dir;
+			this.filePrefix = prefix;
+			this.fileSuffix = suffix;
+		}
+		#endregion
+
+		#region ILogHandler Members
+		/// <summary>
+		/// Gracefully shuts down the log handler
+		/// </summary>
+		public void GracefulShutDown() {
+			throw new NotImplementedException();
+		}
+
+		/// <summary>
+		/// Gets or sets the log level
+		/// </summary>
+		public LogLevel? LogLevel {
+			get {
+				return this.logLevel;
+			}
+			set {
+				this.logLevel = value;
+			}
+		}
+
+		/// <summary>
+		/// Logs a message to a file defined by LogDirectory, FilePrefix and 
+		/// FileSuffix (see BuildFileName()) at the specified log level
+		/// </summary>
+		/// <param name="message">The message to log</param>
+		/// <param name="level">The log level</param>
+		public virtual bool Log(string message, LogLevel level) {
+			string fileName = this.BuildFileName();
+
+			try {
+				File.AppendAllText(fileName, message);
+			}
+			catch (Exception e) {
+				return false;
+			}
+
+			return true;
+		}
+
+		/// <summary>
+		/// Gets or sets the message handler used by this log handler
+		/// </summary>
+		public IMessageHandler MessageHandler {
+			get {
+				return this.messageHandler;
+			}
+			set {
+				this.messageHandler = value;
+			}
+		}
+		#endregion
+
+		/// <summary>
+		/// Builds the log file name
+		/// </summary>
+		protected virtual string BuildFileName() {
+			string fileName = this.logDirectory + Path.DirectorySeparatorChar + this.FilePrefix;
+			fileName += "_" + string.Format("{0:yyyyMMdd}", DateTime.Now) + this.FileSuffix;
+			return fileName;
+		}
+
+		/// <summary>
+		/// Gets or sets the directory to log to
+		/// </summary>
+		public string LogDirectory {
+			get {
+				return this.logDirectory;
+			}
+			set {
+				this.logDirectory = value;
+			}
+		}
+
+		/// <summary>
+		/// Gets or sets the filename prefix
+		/// </summary>
+		public string FilePrefix {
+			get {
+				return this.filePrefix;
+			}
+			set {
+				this.filePrefix = value;
+			}
+		}
+
+		/// <summary>
+		/// Gets or sets the filename suffix
+		/// </summary>
+		public string FileSuffix {
+			get {
+				return this.fileSuffix;
+			}
+			set {
+				this.fileSuffix = value;
+			}
+		}
+		
+	}
+}

SimpleLog/SimpleLog.csproj

@@ -56,6 +56,7 @@
     <Compile Include="IMessageHandler.cs" />
     <Compile Include="LogHandlers\ConsoleLogHandler.cs" />
     <Compile Include="LogHandlers\ConsoleWindowLogHandler.cs" />
+    <Compile Include="LogHandlers\FileLogHandler.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Util.cs" />
   </ItemGroup>