SourceCode/PROMS/VEPROMS.CSLA.Library/Extension/ROImageExt.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using Csla;
using Csla.Data;
using System.IO;

namespace VEPROMS.CSLA.Library
{
	public partial class ROImageInfo
	{
		public static ROImageInfo GetByROFstID_FileName(int rOFstID, string fileName)
		{
			//if (!CanGetObject())
			//    throw new System.Security.SecurityException("User not authorized to view a ROImage");
			try
			{
				ROImageInfo tmp = DataPortal.Fetch<ROImageInfo>(new ROFstID_FileNameCriteria(rOFstID, fileName));
				if (tmp.ErrorMessage == "No Record Found")
				{
					tmp.Dispose(); // Clean-up ROImage
					tmp = null;
				}
				return tmp;
			}
			catch (Exception ex)
			{
				throw new DbCslaException("Error on ROImage.GetByROFstID_FileName", ex);
			}
		}
		private void DataPortal_Fetch(ROFstID_FileNameCriteria criteria)
		{
			if (_MyLog.IsDebugEnabled) _MyLog.DebugFormat("[{0}] ROImageInfo.DataPortal_Fetch", GetHashCode());
			try
			{
				using (SqlConnection cn = Database.VEPROMS_SqlConnection)
				{
					ApplicationContext.LocalContext["cn"] = cn;
					using (SqlCommand cm = cn.CreateCommand())
					{
						cm.CommandType = CommandType.StoredProcedure;
						cm.CommandText = "getROImageByROFstID_FileName";
						cm.Parameters.AddWithValue("@ROFstID", criteria.ROFstID);
						cm.Parameters.AddWithValue("@FileName", criteria.FileName);
						using (SafeDataReader dr = new SafeDataReader(cm.ExecuteReader()))
						{
							if (!dr.Read())
							{
								_ErrorMessage = "No Record Found";
								return;
							}
							ReadData(dr);
						}
					}
					// removing of item only needed for local data portal
					if (ApplicationContext.ExecutionLocation == ApplicationContext.ExecutionLocations.Client)
						ApplicationContext.LocalContext.Remove("cn");
				}
			}
			catch (Exception ex)
			{
				if (_MyLog.IsErrorEnabled) _MyLog.Error("ROImageInfo.DataPortal_Fetch", ex);
				_ErrorMessage = ex.Message;
				throw new DbCslaException("ROImageInfo.DataPortal_Fetch", ex);
			}
		}
		[Serializable()]
		private class ROFstID_FileNameCriteria
		{
			private int _ROFstID;

			public int ROFstID
			{ get { return _ROFstID; } }
			private string _FileName;
			public string FileName
			{ get { return _FileName; } }
			public ROFstID_FileNameCriteria(int rOFstID, string fileName)
			{
				_ROFstID = rOFstID;
				_FileName = fileName;
			}
		}
	}
	public class ROImageFile : IDisposable
	{
		private static readonly log4net.ILog _MyLog = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
		#region Fields
		private bool _IsDisposed;
		private static string _TemporaryFolder = null;
		#endregion
		#region Properties
		public static string TemporaryFolder
		{
			get
			{
				if (_TemporaryFolder == null)
				{
					// This will create a Temp\VE-PROMS folder in the LocalSettings Folder.
					//XP - C:\Documents and Settings\{user}\Local Settings\Application Data\Temp\VE-PROMS
					//Vista - C:\Users\{user}\AppData\Local\Temp\VE-PROMS
					_TemporaryFolder = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) + @"\Temp";
					if (!Directory.Exists(TemporaryFolder)) Directory.CreateDirectory(TemporaryFolder);
					_TemporaryFolder += @"\VE-PROMS";
					if (!Directory.Exists(TemporaryFolder)) Directory.CreateDirectory(TemporaryFolder);
				}
				return _TemporaryFolder;
			}
		}
		private ROImageInfo _MyROImage = null;
		public ROImageInfo MyROImage
		{
			get { return _MyROImage; }
			set
			{
				TryDelete();
				_MyROImage = value;
				CreateFile();
			}
		}
		private FileInfo _MyFile = null;
		public FileInfo MyFile
		{
			get { return _MyFile; }
		}
		private string _Extension = "TIF";
		public string Extension
		{
			get { return _Extension; }
			set { _Extension = value; }
		}
		#endregion
		#region Private Methods
		private void TryDelete()
		{
			if (_MyROImage == null) return;
			if (_MyFile == null) return;
			if (_MyFile.Exists)
			{
				try
				{
					_MyFile.Delete();
				}
				catch (IOException ex)
				{
					_MyLog.Error("TryDelete", ex);
				}
				finally
				{
					_MyFile = null;
					_MyROImage = null;
				}
			}
		}
		private bool _Created = false;
		private int _Unique = 0;
		private string Unique
		{
			get
			{
				string retval = "";
				if (_Unique != 0) retval = "_" + _Unique.ToString();
				_Unique++;
				return retval;
			}
		}
		private void CreateFile()
		{
			while (!_Created)
				CreateTemporaryFile();
		}

		private void CreateTemporaryFile()
		{
			try
			{
				if (_MyROImage != null)
				{
					_MyFile = new FileInfo(string.Format(@"{0}\tmp_{1}{2}", TemporaryFolder, Unique, MyROImage.FileName));
					FileStream fs = _MyFile.Create();
					fs.Write(MyROImage.Content, 0, MyROImage.Content.Length);
					fs.Close();
					_MyFile.CreationTime = MyROImage.DTS;
					_MyFile.LastWriteTime = MyROImage.DTS;
					_Created = true;
				}
			}
			catch (Exception ex)
			{
				Console.WriteLine(ex.Message);
			}
		}
		public string FullName
		{
			get { return _MyFile.FullName; }
			set
			{
				if (FullName != value)
					_MyFile = new FileInfo(value);
			}
		}
		public void SaveFile()
		{
			// TODO: Add Try & Catch logic
			if (_MyROImage == null) return;
			ROImage roImage = _MyROImage.Get();
			FileStream fs = _MyFile.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
			Byte[] buf = new byte[_MyFile.Length];
			fs.Read(buf, 0, buf.Length);
			fs.Close();
			//roImage.FileName;
			roImage.Content = buf;
			roImage.UserID = Environment.UserName;
			roImage.DTS = _MyFile.LastWriteTime;
			roImage.Save();
		}
		#endregion
		#region Constructors
		public ROImageFile(ROImageInfo myROImage)
		{
			MyROImage = myROImage;
		}
		#endregion
		#region Destructor
		~ROImageFile()
		{
			Dispose(false);
		}
		public void Dispose()
		{
			Dispose(false);
			GC.SuppressFinalize(this);
		}

		protected void Dispose(bool disposing)
		{
			if (!_IsDisposed)
			{
				_IsDisposed = true;
				TryDelete();
			}
		}
		#endregion
	}
}