www.pudn.com > dotnetupdater.rar > UpdateLog.cs

using System; 
using System.IO; 
 
namespace Microsoft.Samples.AppUpdater 
{ 
	//************************************************************** 
	// UpdateLog Class 
	// Used to write the updater log file, which records update  
	// successes & failures to assist debugging.  
	//************************************************************** 
	internal class UpdateLog 
	{ 
		const string LogFileName = "AppUpdate.log"; 
 
		//************************************************************** 
		// UpdateLog()	 
		//************************************************************** 
		internal UpdateLog() 
		{ 
			string FullLogFilePath = Path.Combine(GetLogFilePath(), LogFileName); 
			if (!File.Exists(FullLogFilePath)) 
			{ 
				File.Create(FullLogFilePath); 
				File.SetAttributes(FullLogFilePath,FileAttributes.Hidden); 
			} 
		} 
 
		//************************************************************** 
		// AddSuccess()	 
		//************************************************************** 
		internal void AddSuccess(string versionNumber) 
		{ 
			string FullLogFilePath = Path.Combine(GetLogFilePath(), LogFileName); 
			FileStream LogStream = File.Open(FullLogFilePath,FileMode.Append); 
			StreamWriter SW = new StreamWriter(LogStream); 
 
			string StringToWrite; 
			StringToWrite = DateTime.Now.ToString() + ":  Successful update to version:  " + versionNumber; 
 
			SW.WriteLine(StringToWrite); 
			SW.Close(); 
		} 
 
		//************************************************************** 
		// AddError()	 
		//************************************************************** 
		internal void AddError(string errorMessage) 
		{ 
			string FullLogFilePath = Path.Combine(GetLogFilePath(), LogFileName); 
			FileStream LogStream = File.Open(FullLogFilePath,FileMode.Append); 
			StreamWriter SW = new StreamWriter(LogStream); 
 
			string StringToWrite; 
			StringToWrite = DateTime.Now.ToString() + ":  UPDATE FAILED with the following error message:"; 
			SW.WriteLine(StringToWrite); 
			StringToWrite = errorMessage; 
			SW.WriteLine(StringToWrite); 
			SW.Close(); 
		} 
 
		//************************************************************** 
		// GetLogFilePath()	 
		//************************************************************** 
		private string GetLogFilePath() 
		{ 
			DirectoryInfo DI = new DirectoryInfo(AppDomain.CurrentDomain.BaseDirectory); 
			return (DI.Parent.Parent.FullName + @"\"); 
		} 
 
	} 
}