IManager.cs :  » SQL-Clients » Database-Commander » YariSoft » DBCommander » C# / CSharp Open Source

using System;
using System.Data;
using System.Data.OleDb;
using System.Windows.Forms;
using YariSoft.DBUtil;

namespace YariSoft.DBCommander{
  public class IManager
  {
    #region Loacal variables
    protected OleDbConnection connecton = null;
    protected SchemaGenerator schema  = null;
    protected bool _initialized      = false;
    protected bool needRefresh      = false;
    private ConnectionState previousConnectionState;
    #endregion

    #region Properties
    public bool Initialized
    {
      get{ return this._initialized; }
    }
    public bool NeedRefresh
    {
      get { return this.needRefresh; }
    }
    #endregion

    #region Constructor/Destructor
    public IManager( OleDbConnection Connecton, SchemaGenerator SchemaGenerator )
    {
      this.connecton = Connecton;
      this.schema = SchemaGenerator;
    }

    public virtual void Dispose(){

    }
    #endregion

    #region Protected functions
    protected bool OpenConnection()
    {
      this.previousConnectionState = this.connecton.State;

      bool result = true;
      try {
        if( previousConnectionState == ConnectionState.Closed ){
          this.connecton.Open();
        }
      } catch(Exception Exp ) {
        YariSoft.Utils.YMessages.Show( Exp.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error );
        result = false;
      }
      return result;
    }

    protected bool CloseConnection()
    {
      bool result = true;
      try {
        if( previousConnectionState == ConnectionState.Closed ){
          this.connecton.Close();
        }
      } catch(Exception Exp ) {
        YariSoft.Utils.YMessages.Show( Exp.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error );
        result = false;
      }
      return result;
    }
    #endregion

    #region Public functions
    public virtual DataView FillData( object SelectValue )
    {
      this._initialized = true;
      return null;
    }

    public virtual DataView GetData( object SelectValue )
    {
      return null;
    }

    public virtual DataView RefreshData( object SelectValue )
    {
      return null;
    }

    public virtual bool FillTableDataByFK ( string FKName )
    {
      return true;
    }

    public virtual bool UpdateData( object UpdateObject )
    {
      return true;
    }

    #endregion
  }
}