Initial Comit

Database/DB/clsDBInteractionBase.cs

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+using System;
+using System.Configuration;
+using System.Data;
+using System.Data.SqlClient;
+using System.Data.SqlTypes;
+
+namespace edoka_dms
+{
+	public enum LLBLError
+	{
+		AllOk
+		// Add more here (check the comma's!)
+	}
+
+
+	public interface ICommonDBAccess
+	{
+		bool		Insert();
+		bool		Update();
+		bool		Delete();
+		DataTable	SelectOne();
+		DataTable	SelectAll();
+	}
+
+
+	public abstract class clsDBInteractionBase : IDisposable, ICommonDBAccess
+	{
+		#region Class Member Declarations
+			protected	SqlConnection			m_scoMainConnection;
+			protected	int						m_iRowsAffected;
+			protected	SqlInt32				m_iErrorCode;
+			protected	bool					m_bMainConnectionIsCreatedLocal;
+			protected	clsConnectionProvider		m_cpMainConnectionProvider;
+			private		string					m_sConnectionString;
+			private		bool					m_bIsDisposed;
+		#endregion
+
+
+		public clsDBInteractionBase()
+		{
+			// Initialize the class' members.
+			InitClass();
+		}
+
+
+		private void InitClass()
+		{
+			// create all the objects and initialize other members.
+			m_scoMainConnection = new SqlConnection();
+			m_bMainConnectionIsCreatedLocal = true;
+			m_cpMainConnectionProvider = null;
+			m_iErrorCode = (int)LLBLError.AllOk;
+			m_bIsDisposed = false;
+		}
+
+
+		public void Dispose()
+		{
+			Dispose(true);
+			GC.SuppressFinalize(this);
+		}
+
+
+		protected virtual void Dispose(bool bIsDisposing)
+		{
+			// Check to see if Dispose has already been called.
+			if(!m_bIsDisposed)
+			{
+				if(bIsDisposing)
+				{
+					// Dispose managed resources.
+					if(m_bMainConnectionIsCreatedLocal)
+					{
+						// Object is created in this class, so destroy it here.
+						m_scoMainConnection.Close();
+						m_scoMainConnection.Dispose();
+						m_bMainConnectionIsCreatedLocal = false;
+					}
+					m_cpMainConnectionProvider = null;
+					m_scoMainConnection = null;
+				}
+			}
+			m_bIsDisposed = true;
+		}
+
+
+		public virtual bool Insert()
+		{
+			// No implementation, throw exception
+			throw new NotImplementedException();
+		}
+
+
+		public virtual bool Delete()
+		{
+			// No implementation, throw exception
+			throw new NotImplementedException();
+		}
+
+
+		public virtual bool Update()
+		{
+			// No implementation, throw exception
+			throw new NotImplementedException();
+		}
+
+
+		public virtual DataTable SelectOne()
+		{
+			// No implementation, throw exception
+			throw new NotImplementedException();
+		}
+
+
+		public virtual DataTable SelectAll()
+		{
+			// No implementation, throw exception
+			throw new NotImplementedException();
+		}
+
+
+		#region Class Property Declarations
+		public clsConnectionProvider cpMainConnectionProvider
+		{
+			set
+			{
+				if(value==null)
+				{
+					// Invalid value
+					throw new ArgumentNullException("cpMainConnectionProvider", "Null passed as value to this property which is not allowed.");
+				}
+
+				// A connection provider object is passed to this class.
+				// Retrieve the SqlConnection object, if present and create a
+				// reference to it. If there is already a MainConnection object
+				// referenced by the membervar, destroy that one or simply 
+				// remove the reference, based on the flag.
+				if(m_scoMainConnection!=null)
+				{
+					// First get rid of current connection object. Caller is responsible
+					if(m_bMainConnectionIsCreatedLocal)
+					{
+						// Is local created object, close it and dispose it.
+						m_scoMainConnection.Close();
+						m_scoMainConnection.Dispose();
+					}
+					// Remove reference.
+					m_scoMainConnection = null;
+				}
+				m_cpMainConnectionProvider = (clsConnectionProvider)value;
+				m_scoMainConnection = m_cpMainConnectionProvider.scoDBConnection;
+				m_bMainConnectionIsCreatedLocal = false;
+			}
+		}
+
+
+		public SqlInt32 iErrorCode
+		{
+			get
+			{
+				return m_iErrorCode;
+			}
+		}
+
+
+		public string sConnectionString
+		{
+			get
+			{
+				return m_sConnectionString;
+			}
+			set
+			{
+				m_sConnectionString = value;
+				m_scoMainConnection.ConnectionString = m_sConnectionString;
+			}
+		}
+		public int iRowsAffected
+		{
+			get
+			{
+				return m_iRowsAffected;
+			}
+		}
+		#endregion
+	}
+}