Merge pull request #2 from SyncfusionExamples/ES-975464

ES-975464 - Resolve the ReadMe file length issue in this sample repository

Author: vijayarasan

PrintPreview.png

@@ -1,2 +1,92 @@
-# How to print wpf treegrid with pdfviewercontrol?
-This sample illustrates how to print wpf treegrid with pdfviewercontrol 
+# How to Print WPF TreeGrid with PdfViewerControl?
+
+This sample illustrates how to print [WPF TreeGrid](https://www.syncfusion.com/wpf-controls/treegrid) (SfTreeGrid) with [PdfViewerControl](https://help.syncfusion.com/wpf/pdf-viewer/printing-pdf-files).
+
+The printing feature can be achieved by exporting the **TreeGrid** to PDF and printing the exported PDF using the **PdfViewerControl**.
+
+``` c#
+var options = new TreeGridPdfExportingOptions();
+FileStream fileStream = new FileStream("Sample.pdf", FileMode.Create);
+var document = treeGrid.ExportToPdf(options);
+MemoryStream stream = new MemoryStream();
+document.Save(stream);
+PdfViewerControl pdfViewer = new PdfViewerControl();
+pdfViewer.Load(stream);
+Window window = new Window();
+window.Content = pdfViewer;
+window.Loaded += Window_Loaded;
+window.Show();
+
+private void Window_Loaded(object sender, RoutedEventArgs e)
+{
+    var toolbar = pdfViewer.Template.FindName("PART_Toolbar", pdfViewer) as DocumentToolbar;
+    // Get an instance of the open and save file buttons using its template name.
+    Button openButton = (Button)toolbar.Template.FindName("PART_ButtonOpen", toolbar);
+    Button saveButton = (Button)toolbar.Template.FindName("PART_ButtonSave", toolbar);
+
+    // Set visibility of the button to collapsed.
+    openButton.Visibility = System.Windows.Visibility.Collapsed;
+    saveButton.Visibility = Visibility.Collapsed;
+}
+```
+
+![Printing TreeGrid with PdfViewerControl](PrintPreview.png)
+
+### Print Parent and Expanded Child Nodes:
+
+You can print only the parent and expanded child nodes by overriding the [ExportNodesToPdf](https://help.syncfusion.com/cr/wpf/Syncfusion.UI.Xaml.TreeGrid.Converter.TreeGridToPdfConverter.html#Syncfusion_UI_Xaml_TreeGrid_Converter_TreeGridToPdfConverter_ExportNodesToPdf_Syncfusion_UI_Xaml_TreeGrid_SfTreeGrid_Syncfusion_UI_Xaml_TreeGrid_TreeNodes_Syncfusion_Pdf_Grid_PdfGrid_Syncfusion_UI_Xaml_TreeGrid_Converter_TreeGridPdfExportingOptions_) method of the [TreeGridToPdfConverter](https://help.syncfusion.com/cr/wpf/Syncfusion.UI.Xaml.TreeGrid.Converter.TreeGridToPdfConverter.html) class.
+
+``` csharp
+var options = new TreeGridPdfExportingOptions();
+options.AllowIndentColumn = true;
+options.FitAllColumnsInOnePage = true;
+var document = treeGrid.ExportToPdf(options, true);
+PdfViewerControl pdfViewer = new PdfViewerControl();
+MemoryStream stream = new MemoryStream();
+document.Save(stream);
+PdfLoadedDocument ldoc = new PdfLoadedDocument(stream);
+pdfViewer.Load(ldoc);
+// If you want to  show the pdf viewer window, enable the following line.
+MainWindow pdfPage = new MainWindow();
+pdfPage.Content = pdfViewer;
+pdfPage.Show();
+pdfViewer.Print(true);
+
+public class TreeGridCustomPdfConverter : TreeGridToPdfConverter
+{
+    internal bool _excludeNonExpandedNodes;
+
+    public TreeGridCustomPdfConverter(bool excludeNonExpandedNodes) :base()
+    {
+        _excludeNonExpandedNodes = excludeNonExpandedNodes;
+    }
+
+    /// <summary>
+    /// ExportNodes to PDF
+    /// </summary>
+    /// <param name="treeGrid"></param>
+    /// <param name="nodes"></param>
+    /// <param name="pdfGrid"></param>
+    /// <param name="pdfExportingOptions"></param>
+    protected override void ExportNodesToPdf(SfTreeGrid treeGrid, TreeNodes nodes, PdfGrid pdfGrid, TreeGridPdfExportingOptions pdfExportingOptions)
+    {
+        if (!_excludeNonExpandedNodes)
+        {
+            base.ExportNodesToPdf(treeGrid, nodes, pdfGrid, pdfExportingOptions);
+        }
+        else
+        {
+            for (int i = 0; i < nodes.Count; i++)
+            {
+                TreeNode node = nodes[i];
+                ExportNodeToPdf(treeGrid, node, pdfGrid, pdfExportingOptions);
+                if (node.IsExpanded && node.HasChildNodes)
+                {
+                    node.PopulateChildNodes();
+                    ExportNodesToPdf(treeGrid, node.ChildNodes, pdfGrid, pdfExportingOptions);
+                }
+            }
+        }
+    }
+}
+```