GridView Print and Print Preview-白红宇

GridView Print and Print Preview

阅读量：6816 次

发布时间：2019-06-26

本文共 9961 字，大约阅读时间需要 33 分钟。

1 sing System.Linq;   2 using System.Printing;   3 using System.Windows;   4 using System.Windows.Controls;   5 using System.Windows.Documents;   6 using System.Windows.Markup;   7 using System.Windows.Media;   8 using Telerik.Windows.Controls;   9 using Telerik.Windows.Controls.GridView;  10   11 namespace YourNamespaceHere  12 {  13     ///   14     /// Support Printing Related Methods  15     /// 
  16     public static class PrintExtensions  17     {  18         #region ___________ Properties ____________________________________________________________________________________________  19         ///   20         /// Zoom Enumeration to specify how pages are stretched in print and preview  21         /// 
  22         public enum ZoomType  23         {  24             ///   25             /// 100% of normal size  26             /// 
  27             Full,  28   29             ///   30             /// Page Width (fit so one page stretches to full width)  31             /// 
  32             Width,  33   34             ///   35             /// Page Height (fit so one page stretches to full height)  36             /// 
  37             Height,  38   39             ///   40             /// Display two columsn of pages  41             /// 
  42             TwoWide  43         };         44         #endregion  45         #region ___________ Methods _______________________________________________________________________________________________  46         ///   47         /// Print element to a document  48         /// 
  49         /// GUI Element to Print  50         /// Reference to Print Dialog  51         /// Page Orientation (i.e. Portrait vs. Landscape)  52         /// 
     
      Destination document
       53         static FixedDocument ToFixedDocument(FrameworkElement element, PrintDialog dialog, PageOrientation orientation = PageOrientation.Portrait)  54         {  55             dialog.PrintTicket.PageOrientation = orientation;  56             PrintCapabilities capabilities = dialog.PrintQueue.GetPrintCapabilities(dialog.PrintTicket);  57             Size pageSize = new Size(dialog.PrintableAreaWidth, dialog.PrintableAreaHeight);  58             Size extentSize = new Size(capabilities.PageImageableArea.ExtentWidth, capabilities.PageImageableArea.ExtentHeight);  59   60             FixedDocument fixedDocument = new FixedDocument();  61   62             element.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));  63             element.Arrange(new Rect(new Point(0, 0), element.DesiredSize));  64   65             for (double y = 0; y < element.DesiredSize.Height; y += extentSize.Height)  66             {  67                 for (double x = 0; x < element.DesiredSize.Width; x += extentSize.Width)  68                 {  69                     VisualBrush brush = new VisualBrush(element);  70                     brush.Stretch = Stretch.None;  71                     brush.AlignmentX = AlignmentX.Left;  72                     brush.AlignmentY = AlignmentY.Top;  73                     brush.ViewboxUnits = BrushMappingMode.Absolute;  74                     brush.TileMode = TileMode.None;  75                     brush.Viewbox = new Rect(x, y, extentSize.Width, extentSize.Height);  76   77                     PageContent pageContent = new PageContent();  78                     FixedPage page = new FixedPage();  79                     ((IAddChild)pageContent).AddChild(page);  80   81                     fixedDocument.Pages.Add(pageContent);  82                     page.Width = pageSize.Width;  83                     page.Height = pageSize.Height;  84   85                     Canvas canvas = new Canvas();  86                     FixedPage.SetLeft(canvas, capabilities.PageImageableArea.OriginWidth);  87                     FixedPage.SetTop(canvas, capabilities.PageImageableArea.OriginHeight);  88                     canvas.Width = extentSize.Width;  89                     canvas.Height = extentSize.Height;  90                     canvas.Background = brush;  91   92                     page.Children.Add(canvas);  93                 }  94             }  95             return fixedDocument;  96         }  97   98         ///   99         /// Convert GridView to Printer-Friendly version of a GridView 100         /// 
 101         /// Input GridView 102         /// 
     
      Printer-Friendly version of source
      103         static GridViewDataControl ToPrintFriendlyGrid(GridViewDataControl source) 104         { 105             RadGridView grid = new RadGridView(); 106  107             grid.ItemsSource = source.ItemsSource; 108             grid.RowIndicatorVisibility = Visibility.Collapsed; 109             grid.ShowGroupPanel = false; 110             grid.CanUserFreezeColumns = false; 111             grid.IsFilteringAllowed = false; 112             grid.AutoExpandGroups = true; 113             grid.AutoGenerateColumns = false; 114  115             foreach (GridViewDataColumn column in source.Columns.OfType
     
      ()) 116             { 117                 GridViewDataColumn newColumn = new GridViewDataColumn(); 118                 newColumn.Width = column.ActualWidth; 119                 newColumn.DisplayIndex = column.DisplayIndex; 120                 //newColumn.DataMemberBinding = new System.Windows.Data.Binding(column.UniqueName); 121                 newColumn.DataMemberBinding = column.DataMemberBinding; // Better to just copy the references to get all the custom formatting 122                 newColumn.DataFormatString = column.DataFormatString; 123                 newColumn.TextAlignment = column.TextAlignment; 124                 newColumn.Header = column.Header; 125                 newColumn.Footer = column.Footer; 126                 grid.Columns.Add(newColumn); 127             } 128  129             StyleManager.SetTheme(grid, StyleManager.GetTheme(grid)); 130  131             grid.SortDescriptors.AddRange(source.SortDescriptors); 132             grid.GroupDescriptors.AddRange(source.GroupDescriptors); 133             grid.FilterDescriptors.AddRange(source.FilterDescriptors); 134  135             return grid; 136         } 137  138         /// 
       139         /// Perform a Print Preview on GridView source 140         /// 
 141         /// 
      Input GridView 142         /// 
      Page Orientation (i.e. Portrait vs. Landscape) 143         /// 
      Zoom Enumeration to specify how pages are stretched in print and preview 144         public static void PrintPreview(GridViewDataControl source, PageOrientation orientation = PageOrientation.Landscape, ZoomType zoom = ZoomType.TwoWide) 145         { 146             Window window = new Window(); 147             window.Title = "Print Preview"; 148             if (!string.IsNullOrWhiteSpace(source.ToolTip as string)) window.Title += " of " + source.ToolTip; 149             window.Width = SystemParameters.PrimaryScreenWidth * 0.92; 150             window.Height = SystemParameters.WorkArea.Height; 151             window.Left = constrain(SystemParameters.VirtualScreenWidth - SystemParameters.PrimaryScreenWidth, 0, SystemParameters.VirtualScreenWidth - 11); 152             window.Top = constrain(0, 0, SystemParameters.VirtualScreenHeight - 25); 153  154             DocumentViewer viewer = new DocumentViewer(); 155             viewer.Document = ToFixedDocument(ToPrintFriendlyGrid(source), new PrintDialog(), orientation); 156             Zoom(viewer, zoom); 157             window.Content = viewer; 158  159             window.ShowDialog(); 160         } 161  162         /// 
       163         /// Constrain val to the range [val_min, val_max] 164         /// 
 165         /// 
      Value to be constrained 166         /// 
      Minimum that will be returned if val is less than val_min 167         /// 
      Maximum that will be returned if val is greater than val_max 168         /// 
      
       val in [val_min, val_max]
       169         private static double constrain(double val, double val_min, double val_max) 170         { 171             if (val < val_min) return val_min; 172             else if (val > val_max) return val_max; 173             else return val; 174         } 175  176         /// 
       177         /// Perform a Print on GridView source 178         /// 
 179         /// 
      Input GridView 180         /// 
      True to show print dialog before printing 181         /// 
      Page Orientation (i.e. Portrait vs. Landscape) 182         /// 
      Zoom Enumeration to specify how pages are stretched in print and preview 183         public static void Print(GridViewDataControl source, bool showDialog = true, PageOrientation orientation = PageOrientation.Landscape, ZoomType zoom = ZoomType.TwoWide) 184         { 185             PrintDialog dialog = new PrintDialog(); 186             bool? dialogResult = showDialog ? dialog.ShowDialog() : true; 187  188             if (dialogResult == true) 189             { 190                 DocumentViewer viewer = new DocumentViewer(); 191                 viewer.Document = ToFixedDocument(ToPrintFriendlyGrid(source), dialog, orientation); 192                 Zoom(viewer, zoom); 193                 dialog.PrintDocument(viewer.Document.DocumentPaginator, ""); 194             } 195         } 196  197         /// 
       198         /// Scale viewer to size specified by zoom 199         /// 
 200         /// 
      Document to zoom 201         /// 
      Zoom Enumeration to specify how pages are stretched in print and preview 202         public static void Zoom(DocumentViewer viewer, ZoomType zoom) 203         { 204             switch (zoom) 205             { 206                 case ZoomType.Height: viewer.FitToHeight(); break; 207                 case ZoomType.Width: viewer.FitToWidth(); break; 208                 case ZoomType.TwoWide: viewer.FitToMaxPagesAcross(2); break; 209                 case ZoomType.Full: break; 210             } 211         } 212         #endregion 213     }