System.Drawing＆e.HasMorePages問題

我有幾天試圖解決我在C＃中遇到的這個大問題：我試圖打印21條（Bill）票據格式，但紙卷有限制和佔用幾個頁面分割打印，但我不能讓它做從頁面跳轉打印文章＃17，並繼續與＃18的另一頁，請幫助..System.Drawing＆e.HasMorePages問題

private void DrawItems(System.Drawing.Printing.PrintPageEventArgs e) 
     { 
      int linesprinted = 0; 
      int linesperpage = 17; 
      int numberitems = items.Count; //21 

      //numberitems/linespage = 1.23 = 2 Pages True :) 

      if (linesprinted <= linesperpage) 
      { 
       linesprinted++; 
       e.HasMorePages = false; 
      } 
      else { 
       linesprinted=0; 
       e.HasMorePages = true; 
      } 

//print items 
      OrderItem ordIt = new OrderItem('?'); 

      gfx.DrawString("C/P DESCRIPCION     TOTAL", new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat()); 
      DrawEspacio(); 
      gfx.DrawString(DottedLine(), new Font(fontName, 9, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat()); 
      count++; 

      foreach (string item in items) 
      { 

       String ItemCantidad = ordIt.GetItemCantidad(item); 
       String ItemPrice = ordIt.GetItemPrice(item); 
       Int16 not_equal = 0; 


       gfx.DrawString(ItemCantidad + " x", new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat()); 

       line = ordIt.GetItemUnitPrice(item); 
       line = AlignRightText(line.Length) + line; 

       gfx.DrawString("     " + line, printFont, myBrush, leftMargin, YPosition(), new StringFormat()); 

       string name = ordIt.GetItemName(item); 

       leftMargin = 0; 
       if (name.Length > maxCharDescription) 
       { 
        int currentChar = 0; 
        int itemLenght = name.Length; 

        while (itemLenght > maxCharDescription) 
        { 
         line = ordIt.GetItemName(item); 
         gfx.DrawString("   " + line.Substring(currentChar, maxCharDescription), new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat()); 

         count++; 
         not_equal++; 
         if (not_equal == 1) 
         { 
          gfx.DrawString(ItemPrice, new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat()); 
         } 
         currentChar += maxCharDescription; 
         itemLenght -= maxCharDescription; 
        } 

        line = ordIt.GetItemName(item); 
        gfx.DrawString("   " + line.Substring(currentChar, line.Length - currentChar), new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat()); 
        count++; 
        gfx.DrawString("-----", new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat()); 
        count++; 
       } 
       else 
       { 
        gfx.DrawString("   " + ordIt.GetItemName(item), new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat()); 
        count++; 
        gfx.DrawString(ItemPrice, new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat()); 
        count++; 
        gfx.DrawString("-----", new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat()); 
        count++; 
       } 

      } //end foreach 


      leftMargin = 0; 
      gfx.DrawString(DottedLine(), new Font(fontName, 9, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat()); 
      DrawEspacio(); 

     } //end function

來源

2012-02-09 John Nuñez

我認爲你不這樣做對。它應該是這樣的：

private void MyPrintDocument_PrintPage(object sender, 
     System.Drawing.Printing.PrintPageEventArgs e) 
    { 
     bool more = DrawItems(e.Graphics); 
     if (more == true) 
      e.HasMorePages = true; 
    }

於是，經過PrintDocumentPrint事件，你打電話給你的方法繪製的項目，它跟蹤最後一個被繪製項目在方法的變量之外，所以當它再次被調用知道從哪裏開始。當涉及到應該轉到下一頁的項目時，它會返回true。

來源

2012-02-09 21:04:54

System.Drawing＆e.HasMorePages問題

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