2014-04-22 64 views
1

我正在嘗試實現WPF打印功能。只要用戶不想在一頁上打印更多的內容,它就會工作。我的應用程序使用戶能夠在運行時創建xaml。現在我想讓他打印他創建的xaml控件。wpf打印多頁xaml控件

我檢查了所有xaml控件的總高度,由pageheight和ceiled分開,因此我知道需要打印多少頁。

接下來,我爲每個頁面創建一個FrameworkElements列表(請參閱下面的邏輯),並將每個List(每個List代表一個頁面)存儲在一個數組中。

最後,我想創建一個包含每個頁面的預覽,並使用戶能夠打印所有頁面。爲了做到這一點,我不得不把頁面放在一起到一個文件,但我不知道如何。請看看我的代碼:

Package package = Package.Open("test.xps", FileMode.Create); 

     // Create new xps document based on the package opened 

     XpsDocument doc = new XpsDocument(package); 

     // Create an instance of XpsDocumentWriter for the document 

     XpsDocumentWriter writer = XpsDocument.CreateXpsDocumentWriter(doc); 

     // Write the canvas (as Visual) to the document 

     double height = element.ActualHeight; 
     double width = element.ActualWidth; 
     System.Windows.Controls.PrintDialog printDlg = new System.Windows.Controls.PrintDialog(); 
     Size pageSize = new Size(printDlg.PrintableAreaWidth, printDlg.PrintableAreaHeight); 
     int pageCount = (int)Math.Ceiling(height/pageSize.Height); 


     if (pageSize.Height < height) { 
      var grid = element as Grid; 
      var children = grid.Children; 
      List<FrameworkElement>[] pages = new List<FrameworkElement>[pageCount-1]; 
      int i = 0; 
      double currentHeight = 0; 

      foreach (FrameworkElement c in children) { 


       currentHeight += c.RenderSize.Height; 


       if (currentHeight < pageSize.Height) { 

        pages[i] = new List<FrameworkElement>(); 
        pages[i].Add(c); 
       } 
       else { 
        i++; 
        currentHeight = 0; 
        pages[i] = new List<FrameworkElement>(); 
        pages[i].Add(c); 
       } 
      } 
      for (int j = 0; j < pageCount; j++) { 
       var collator = writer.CreateVisualsCollator(); 
       collator.BeginBatchWrite(); 
       foreach (FrameworkElement c in pages[j]) { 


        collator.Write(c); 


       } 
       collator.EndBatchWrite(); 
      } 
     } 


     doc.Close(); 

     package.Close(); 

     string filename = @"C:\Users\rzimmermann\Documents\Visual Studio 2012\Projects\MvvmLightPrintFunction\MvvmLightPrintFunction\bin\Debug\test.xps"; 

     DocumentViewer viewer = new DocumentViewer(); 

     doc = new XpsDocument(filename, FileAccess.Read); 

     viewer.Document = doc.GetFixedDocumentSequence(); 

     Window ShowWindow = new Window(); 

     ShowWindow.Width = 400; 

     ShowWindow.Height = 300; 

     ShowWindow.Content = viewer; 

     ShowWindow.Show(); 

非常感謝。

+0

自從我做了它已經太久了,但正如我記得爲每個頁面創建一個FixedPage http://msdn.microsoft.com/en-us/library/system.windows.documents.fixedpage.aspx。 – kenny

回答