911054: Update sample for how to change the thumbnail pane zoom percentage programmatically in WPF PdfViewer

ThumbnailPane/Programmatically-change-thumbnail-zoompercentage/Programatic_thumbnail.slnx

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+<Solution>
+  <Project Path="Programatic_thumbnail/Programatic_thumbnail.csproj" />
+</Solution>

ThumbnailPane/Programmatically-change-thumbnail-zoompercentage/Programatic_thumbnail/App.xaml

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+<Application x:Class="Programatic_thumbnail.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:Programatic_thumbnail"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+
+    </Application.Resources>
+</Application>

ThumbnailPane/Programmatically-change-thumbnail-zoompercentage/Programatic_thumbnail/App.xaml.cs

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+using System.Configuration;
+using System.Data;
+using System.Windows;
+
+namespace Programatic_thumbnail
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+
+}

ThumbnailPane/Programmatically-change-thumbnail-zoompercentage/Programatic_thumbnail/AssemblyInfo.cs

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+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
+                                                //(used if a resource is not found in the page,
+                                                // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly   //where the generic resource dictionary is located
+                                                //(used if a resource is not found in the page,
+                                                // app, or any theme specific resource dictionaries)
+)]

ThumbnailPane/Programmatically-change-thumbnail-zoompercentage/Programatic_thumbnail/MainWindow.xaml

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+<Window x:Class="Programatic_thumbnail.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:Programatic_thumbnail"
+        mc:Ignorable="d"
+        xmlns:PdfViewer="clr-namespace:Syncfusion.Windows.PdfViewer;assembly=Syncfusion.PdfViewer.WPF"
+        Title="MainWindow" Height="450" Width="800">
+    <Grid>
+        <PdfViewer:PdfViewerControl Grid.Row="1" Name="pdfViewer" DocumentLoaded="pdfViewer_DocumentLoaded"/>
+
+    </Grid>
+</Window>

ThumbnailPane/Programmatically-change-thumbnail-zoompercentage/Programatic_thumbnail/MainWindow.xaml.cs

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+using Syncfusion.Windows.PdfViewer;
+using System;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace Programatic_thumbnail
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+            this.WindowState = WindowState.Maximized;
+            pdfViewer.Load("../../../F#.pdf");
+            pdfViewer.ThumbnailSettings.IsExpanded = true;
+        }
+        private void pdfViewer_DocumentLoaded(object sender, EventArgs args)
+        {
+            Grid LeftToolGrid = pdfViewer.Template.FindName("PART_Grid", pdfViewer) as Grid;
+            if (LeftToolGrid != null)
+            {
+                foreach (var LeftToolChild in LeftToolGrid.Children)
+                {
+                    if (LeftToolChild is ThumbnailPane)
+                    {
+                        StackPanel stackPanel = (LeftToolChild as ThumbnailPane).Template.FindName("Thumb_StackPanel", (LeftToolChild as ThumbnailPane)) as StackPanel;
+                        foreach (var stackPanelChild in stackPanel.Children)
+                        {
+                            if (stackPanelChild is Slider)
+                            {
+                                (stackPanelChild as Slider).Value = 12;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

ThumbnailPane/Programmatically-change-thumbnail-zoompercentage/Programatic_thumbnail/Programatic_thumbnail.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.PdfViewer.WPF" Version="*" />
+  </ItemGroup>
+  <Import Project="targets\MultiTargeting.targets" /> 
+
+</Project>

ThumbnailPane/Programmatically-change-thumbnail-zoompercentage/Programatic_thumbnail/targets/MultiTargeting.targets

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+<Project>
+  <PropertyGroup>
+    <TargetFrameworks>net462;net8.0-windows;net9.0-windows;net10.0-windows</TargetFrameworks>
+    <UseWPF>true</UseWPF>
+    <GenerateAssemblyInfo>False</GenerateAssemblyInfo>
+    <GenerateDocumentationFile>True</GenerateDocumentationFile>
+    <EnableDefaultItems>True</EnableDefaultItems>
+	<EnableDefaultEmbeddedResourceItems>True</EnableDefaultEmbeddedResourceItems>	
+  </PropertyGroup>
+</Project>