/// <summary>
		/// 打印預覽，如果需要，國慶期間繼續開放，敬請關注
		/// </summary>
		public void Preview()
		{
			PrinterPageSetting	printerPageSetting;		
			printerPageSetting = new PrinterPageSetting(mPrintDocument);
			printerPageSetting.PrintPage += new PrintPageDelegate(this.PrintPageEventHandler);

			printerPageSetting.ShowPrintPreviewDialog();		
		}

		//繪制		
		private void PrintPageEventHandler(object obj,System.Drawing.Printing.PrintPageEventArgs ev)
		{
			Graphics g = ev.Graphics ;
			
			this.mGraphics = g;

			g.Clear(this.BackColor);

			try
			{	
				bool blnMore = this.Draw(g);
				
				if (blnMore)
				{
					ev.HasMorePages = true;
					mCurrentPageIndex++;
				}
				else
				{
					ev.HasMorePages = false;	
					this.mCurrentPageIndex = 1;
				}
			}
			catch(Exception e)
			{
				System.Windows.Forms.MessageBox.Show(e.Message);
			}
		}


		/// 對象打印接口
		private void OutObject(IDraw outer)
		{
//			this.mGraphics.ResetTransform();
			if (outer != null)
			{
				outer.Graphics = this.mGraphics;
				outer.PrintDocument = this.mPrintDocument;
				outer.Sewing = this.Sewing;
				outer.RectangleF = new RectangleF(X,Y,Width,outer.Height);	
				outer.Draw();
				this.Y  += outer.RectangleF.Height;
			}
		}

		#region 繪制過程

		//*****這段代碼確實太長了，應該用重構的手法進行處理，不過，我這里主要是讓大家從頭到尾的順利的看下去
		//*****在下一個版本的源代碼中我會整理，大家也可以試一試。
		private bool Draw(Graphics g)
		{
			bool blnHasMorePage = false;		//是否還有下一頁標記

			if (this._body.Rows < 0)
			{
				throw new Exception("打印主要網格不能為空，請用Body設置！");
			}

			Printer printer = new Printer();
			printer.Graphics = g;
			printer.PrintDocument = this.mPrintDocument;
			printer.Sewing = this.Sewing;
			
			//初起打印起點坐標及打印區域的寬
			Y = printer.PrinterMargins.Top;
			X = printer.PrinterMargins.Left;
			Width = printer.PrinterMargins.Width;

			#region 畫打印區域及裝訂線
			if (IsPrinterMargins)
			{
				printer.DrawPrinterMargins();
			}
			if (IsSewingLine && _sewing.Margin > 0)
			{
				//對象的線長小于0則自動設置
				if (this._sewing.LineLen < 0)
				{
					if (this._sewing.SewingDirection == SewingDirectionFlag.Left)
					{
						this._sewing.LineLen = printer.PageHeight;
					}
					else if (this._sewing.SewingDirection == SewingDirectionFlag.Top)
					{
						this._sewing.LineLen = printer.PageWidth;
					}

				}
				printer.Sewing = this._sewing;
				printer.DrawSewing();
			}
			#endregion
			
			//正標題每頁必重復打印，無需判斷
			if (_title != null)
			{	
				OutObject(_title);
			}

			if (_caption != null && (mCurrentPageIndex == 1 || _caption.IsDrawAllPage))
			{
				if (_caption != null)
				{	
					if (_title != null)
					{
						_caption.MoveY = this._title.Height + 5;
					}
					OutObject(_caption);
				}
			}

			if (_title != null || _caption != null)
			{
				Y += 20;	//標題與下面有一定距離
			}

			if (_top != null && (mCurrentPageIndex == 1 || _top.IsDrawAllPage))
			{
				OutObject(_top);
			}

			if (_header != null && (mCurrentPageIndex == 1 || _header.IsDrawAllPage))
			{
				OutObject(_header);
			}

			if (_title != null || _caption != null || _top.IsDrawAllPage || _header.IsDrawAllPage)
			{
				Y += 5;	//網格與頁頭距離
			}

			if (_multiHeader != null && (mCurrentPageIndex == 1 || _multiHeader.IsDrawAllPage))
			{
				OutObject(_multiHeader);
				
			}

			#region 主體數據網格

			//計算有效高度，便于分頁
			float validHeight = printer.PrinterMargins.Height - (Y - printer.PrinterMargins.Top);
			if(_footer != null && _footer.IsDrawAllPage)
			{
				validHeight -= this._footer.Height;
			}
			if(_bottom != null && _bottom.IsDrawAllPage)
			{
				validHeight -= this._bottom.Height;
			}
			if (validHeight < 0)
			{
				throw new Exception("預留給打印主要網格的空間太小，請適當調整！");			
			}

			//有效高度中當前頁行數
			int mRowsInCurPage = 0;
			mRowsInCurPage = (int)(validHeight/(float)(this._body.RowHeight));

			//如果指定每頁行數，則以其為主
			if (this.RowsPerPage > 0 && this.RowsPerPage < mRowsInCurPage)
			{
				mRowsInCurPage = this.RowsPerPage;
			}

			if (this.IsSubTotalPerPage)
			{
				mRowsInCurPage--;
			}

			//************以Body為主************
			string[,] mArrGridText;			//保留當前頁文本，用于頁小計
			GoldPrinter.Body mbody;
			
			//如果指定每頁行數，則以其為主
			if (this.RowsPerPage > 0 && this.RowsPerPage < mRowsInCurPage)
			{
				mbody = new Body(mRowsInCurPage,this._body.Cols);
			}
			else
			{
				//否則自適應
				if (mRowsInCurPage > (this._body.Rows - this.mCurrentRowIndex))
				{
					mRowsInCurPage = this._body.Rows - this.mCurrentRowIndex;
				}
				mbody = new Body(mRowsInCurPage,this._body.Cols);			
			}
			mbody.ColsAlignString = this._body.ColsAlignString;

			//存當前頁的二維文本
			mArrGridText = new string[mRowsInCurPage,this._body.Cols];
			for(int i = 0 ; i < mRowsInCurPage && mCurrentRowIndex < this._body.Rows ; i++)
			{
				for(int j = 0 ; j < this._body.Cols ; j++)
				{
					mArrGridText[i,j] = this._body.GetText(mCurrentRowIndex,j);
				}					
				mCurrentRowIndex++;
			}

			mbody.GridText = mArrGridText;
			OutObject(mbody);					

			//判斷是否要分頁，只要數據網格行數據大于數據網格行指針，則還有下一頁
			if (mCurrentRowIndex < this._body.Rows)
			{
				blnHasMorePage = true;
			}

			#region 打印每頁小計，只需要將當前數組用循環累計就OK了，這段程序應專門重構為一個函數，讀者可以自己試一試
			if (_isSubTotalPerPage && _subTotalCol != "")
			{
				try
				{
					GoldPrinter.MultiHeader mhSubTotal = new MultiHeader(1,this._body.Cols);
					mhSubTotal.Graphics = g;
					mhSubTotal.PrintDocument = this.mPrintDocument;
					mhSubTotal.Sewing = this._sewing;		

					mhSubTotal.RectangleF = new RectangleF(X,Y,Width,mhSubTotal.Height);		
					//循環
					//....
					mhSubTotal.SetText(0,0,"本頁小計");
					mhSubTotal.SetText(0,1,"本頁小計");
				
					string[] marrSubTotalCol = this._subTotalCol.Split(';');
					Double mdblSubTotal = 0f;
					int mintCol = 0;

					for(int i = 0 ; i < marrSubTotalCol.Length ; i ++)
					{
						mintCol = int.Parse(marrSubTotalCol[i].Substring(0,1));

						for(int j = 0 ; j < mArrGridText.GetLength(0) ; j++)
						{
							mdblSubTotal += Double.Parse(mArrGridText[j,mintCol]);					
						}
						mhSubTotal.SetText(0,mintCol,mdblSubTotal.ToString());
					}


					mhSubTotal.Draw();			

					Y += mhSubTotal.Height;
				}
				catch(Exception e)
				{}
			}
			#endregion

			#endregion 

			Y += 5;	//網格與頁底距離


			//打印頁腳與最底
			if (_footer != null)
			{
				if (blnHasMorePage == false || _footer.IsDrawAllPage)
				{	
					//這里不再做判斷了，讀者自己對照Body的處理方法去試驗，以加深理解，實際上應是注釋的部分
					OutObject(_footer);
					/*
					if (_footer.IsDrawAllPage)
					{
						OutObject(_footer);
					}
					else
					{
						//與Body同樣的處理
					}
					*/
				}
			}

			if (_bottom != null)
			{
				if (blnHasMorePage == false || _bottom.IsDrawAllPage)
				{
					if (_bottom.IsDrawAllPage)
					{
						OutObject(_bottom);
					}
					else
					{
						//計算有效高度
						validHeight = printer.PrinterMargins.Height - (Y - printer.PrinterMargins.Top);
						if (validHeight < _bottom.Height)
						{
							blnHasMorePage = true;
						}
						else
						{
							OutObject(_bottom);
						}
						
					}
				}
			}

			//畫邊框
			DrawBorder(g,this._multiHeader,mbody);

			mbody = null;

			return blnHasMorePage;
		}
		#endregion

		private void DrawBorder(Graphics g,MultiHeader multiHeader,Body body)
		{
			//網格邊框矩陣
			RectangleF mrecGridBorder;
			float x,y,width,height;
			
			width = body.RectangleF.Width;
			height = body.RectangleF.Height;
			if (multiHeader != null)
			{
				x = multiHeader.RectangleF.X;
				y = multiHeader.RectangleF.Y;
				height += multiHeader.RectangleF.Height;
			}
			else
			{
				x = body.RectangleF.X;
				y = body.RectangleF.Y;
			}
			if (this.IsSubTotalPerPage)
			{
				GoldPrinter.MultiHeader m = new MultiHeader(1,1);
				height += m.RowHeight;
				m = null;
			}
			
			mrecGridBorder = new RectangleF(x,y,width,height);
			Pen pen = new Pen(Color.Black,1);

			GoldPrinter.DrawRectangle dr = new DrawRectangle();
			dr.Graphics = g;
			dr.RectangleF = mrecGridBorder;
			dr.Pen = pen;

			switch (GridBorder)
			{
				case GridBorderFlag.Single:
					dr.Draw();
					break;
				case GridBorderFlag.SingleBold:
					dr.Pen.Width = 2;
					dr.Draw();
					if (multiHeader != null)
					{
						dr.RectangleF = body.RectangleF;
						dr.DrawTopLine();
					}
					break;
				case GridBorderFlag.Double:
					dr.Draw();
					mrecGridBorder = new RectangleF(x-2,y-2,width+4,height+4);
					dr.RectangleF = mrecGridBorder;
					dr.Draw();
					break;				
				case GridBorderFlag.DoubleBold:
					dr.Draw();
					mrecGridBorder = new RectangleF(x-2,y-2,width+4,height+4);
					dr.RectangleF = mrecGridBorder;
					dr.Pen.Width = 2;
					dr.Draw();
					break;				
			}
			
		}


		#region 將打印的相關信息輸出WriteMetricsToConsole(PrintPageEventArgs ev)
		/*
		public void WriteMetricsToConsole(PrintPageEventArgs ev)
		{
			Graphics g = ev.Graphics;
			Console.WriteLine ("*****Information about the printer*****");
			Console.WriteLine("紙張的大小  ev.PageSettings.PaperSize:" + ev.PageSettings.PaperSize);
			Console.WriteLine("打印分辨率  ev.PageSettings.PrinterResolution:" + ev.PageSettings.PrinterResolution);
			Console.WriteLine("旋轉的角度  ev.PageSettings.PrinterSettings.LandscapeAngle" + ev.PageSettings.PrinterSettings.LandscapeAngle);
			Console.WriteLine("");
			Console.WriteLine ("*****Information about the page*****");
			Console.WriteLine("頁面的大小  ev.PageSettings.Bounds:" + ev.PageSettings.Bounds); 
			Console.WriteLine("頁面(同上)  ev.PageBounds:" + ev.PageBounds); 
			Console.WriteLine("頁面的邊距    ev.PageSettings.Margins.:" + ev.PageSettings.Margins); 
			Console.WriteLine("頁面的邊距    ev.MarginBounds:" + ev.MarginBounds); 

			Console.WriteLine("水平分辨率    ev.Graphics.DpiX:" + ev.Graphics.DpiX ); 
			Console.WriteLine("垂直分辨率    ev.Graphics.DpiY:" + ev.Graphics.DpiY ); 

			ev.Graphics.SetClip(ev.PageBounds);
			Console.WriteLine("ev.Graphics.VisibleClipBounds:" + ev.Graphics.VisibleClipBounds);

			SizeF drawingSurfaceSize = new SizeF(
													ev.Graphics.VisibleClipBounds.Width * ev.Graphics.DpiX/100,
													ev.Graphics.VisibleClipBounds.Height * ev.Graphics.DpiY/100);
			Console.WriteLine("drawing Surface Size in Pixels" + drawingSurfaceSize);
		}
		*/
		#endregion

	}//End class
}//End Namespace