如何預處理PrintDocument以計算打印前的總頁數？

在回答這個問題......如何預處理PrintDocument以計算打印前的總頁數？

Printing page x of y in .Net

接受的答案包括本聲明

您不必打印兩次，你只需要模擬第一次打印。

那麼，如何在沒有任何輸出到打印機或屏幕的情況下先通過文檔一次？

來源

2011-08-19 Bill

您將需要創建一個打印機設備上下文，並使用該設備上下文作爲參考DC呈現您的頁面，同時跟蹤您已呈現的頁面數量。這將不得不在.NET打印基礎架構的範圍之外完成。

得到參考打印機DC
基於參考打印機DC
創建圖形對象上繪製位圖
渲染頁面使用的圖形對象以位圖上創建位圖（頁數進行計數這裏）
更多數據打印？轉到4

下面是在步驟1中了一槍，假設你的WinForms正在努力...

Private Function GetHighResolutionGraphics() As Graphics 

     Try 

      Dim HighestResolution As Printing.PrinterResolution = Nothing 
      Dim HighestResolutionPrinter As String = "" 
      Dim XResolution As Integer = Integer.MinValue 

      Using dlg As New PrintDialog 

       For Each Printer As String In Printing.PrinterSettings.InstalledPrinters 
        dlg.PrinterSettings.PrinterName = Printer 
        For Each Resolution As Printing.PrinterResolution In dlg.PrinterSettings.PrinterResolutions 
         Using gr As Graphics = dlg.PrinterSettings.CreateMeasurementGraphics() 
          If gr.DpiX > XResolution Then 
           HighestResolution = Resolution 
           HighestResolutionPrinter = Printer 
           XResolution = gr.DpiX 
          End If 
         End Using 
        Next 
       Next 

       dlg.PrinterSettings.PrinterName = HighestResolutionPrinter 
       dlg.PrinterSettings.DefaultPageSettings.PrinterResolution = HighestResolution 

       Return dlg.PrinterSettings.CreateMeasurementGraphics() 

      End Using 

     Catch ex As Exception 
      ' handle or ignore .NET AccessViolation for certain network printers that are turned off, etc... 
     End Try 

     Return Me.CreateGraphics() 

    End Function

第二步是「簡單的」使用與已經實施PagePrint事件返回參考Graphics對象代碼將頁面渲染到適當的位圖，同時跟蹤您正在渲染的頁面數量。不要忘記將PagePrint事件重構爲一個單獨的例程，該例程接受一個Graphics對象，以便它可以用於打印，預覽和頁碼。不要忘記處理圖形對象和位圖

using gfxReference as Graphics = GetHighResolutionGraphics() 
    using bmpPage as new Bitmap(gfxReference.DpiX * 8.5, gfxReference.DpiY * 11) 
    using gfxRender as Graphics = Graphics.FromImage(bmpPage) 
     gfxRender.Clear(Color.White) 
     // Existing PagePrint event logic goes here (uses gfxRender) 
     // Track Number of pages printed 
    end using 
    end using 
end using

來源

2011-08-22 01:54:45 Pyramid

如何預處理PrintDocument以計算打印前的總頁數？

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