adapt code in C#

DesktopNote.csproj

@@ -62,6 +62,9 @@
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
     </ApplicationDefinition>
+    <Compile Include="Win_Search.xaml.cs">
+      <DependentUpon>Win_Search.xaml</DependentUpon>
+    </Compile>
     <Page Include="MainWindow.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
@@ -74,6 +77,10 @@
       <DependentUpon>MainWindow.xaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
+    <Page Include="Win_Search.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs">

Win_Search.xaml

@@ -0,0 +1,12 @@
+<Window x:Class="DesktopNote.Win_Search"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Search" Height="110" Width="310" MouseDown="Window_MouseDown" WindowStyle="None" Loaded="Window_Loaded" ShowInTaskbar="False" AllowsTransparency="True" Background="{x:Null}" Topmost="True" UseLayoutRounding="True">
+    <Grid Margin="10">
+        <Rectangle Fill="#FFDCF1FF" RadiusY="12" RadiusX="12" Opacity="0.7"/>
+        <TextBlock HorizontalAlignment="Left" Margin="10,13,0,0" TextWrapping="Wrap" Text="Search for" VerticalAlignment="Top"/>
+        <TextBox x:Name="TB_Search" HorizontalAlignment="Left" Height="23" Margin="91,10,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="191" TextChanged="TB_Search_TextChanged"/>
+        <Button x:Name="Btn_Search" Content="Search" HorizontalAlignment="Right" Margin="0,0,65,10" VerticalAlignment="Bottom" Width="50" IsDefault="True" Background="White" Height="25" Click="Btn_Search_Click"/>
+        <Button x:Name="Btn_Cancel" Content="Cancel" HorizontalAlignment="Right" Margin="0,0,10,10" VerticalAlignment="Bottom" Width="50" IsCancel="True" Background="White" Height="25" Click="Btn_Cancel_Click"/>
+    </Grid>
+</Window>

Win_Search.xaml.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Documents;
+using System.Windows.Input;
+
+namespace DesktopNote
+{
+    /// <summary>
+    /// Interaction logic for Win_Search.xaml
+    /// </summary>
+    public partial class Win_Search : Window
+    {
+        private bool textchanged = true;
+
+        public Win_Search()
+        {
+            InitializeComponent();
+        }
+
+        private void MarkTextInRange(RichTextBox richTextBox, string searchText, bool searchNext)
+        {
+            //Get the range to search
+            TextRange searchRange;
+            if (searchNext)
+                searchRange = new TextRange(richTextBox.Selection.Start.GetPositionAtOffset(1), richTextBox.Document.ContentEnd);
+            else
+                searchRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);
+
+            TextPointer start = searchRange.Start.GetNextContextPosition(LogicalDirection.Forward);
+            while (start != null)
+            {
+                var txt = start.GetTextInRun(LogicalDirection.Forward);
+                if (txt.Length > 0)
+                {
+                    int tgtindex = txt.IndexOf(searchText, StringComparison.OrdinalIgnoreCase);
+                    if (tgtindex >= 0)
+                    {
+                        var selstart = start.GetPositionAtOffset(tgtindex);
+                        var selend = start.GetPositionAtOffset(tgtindex + searchText.Length);
+                        //if search string is at line start, non chars are included in below msgbox
+                        //MsgBox(New TextRange(tgtptr, start.GetNextContextPosition(LogicalDirection.Forward)).Text)
+                        ((FrameworkContentElement)selstart.Parent).BringIntoView();
+                        richTextBox.Selection.Select(selstart, selend);
+                        richTextBox.Focus();
+                        break;
+                    }
+                }
+                start = start.GetNextContextPosition(LogicalDirection.Forward);
+                if (start == null)
+                {
+                    textchanged = true;
+                    MessageBox.Show("Search has reached the end of the document.", "", MessageBoxButton.OK, MessageBoxImage.Information);
+                }
+            }
+        }
+
+        private void Window_Loaded(object sender, RoutedEventArgs e)
+        {
+            var mainwin = (MainWindow)Application.Current.MainWindow;
+            Left = mainwin.Left + (mainwin.Width - Width) / 2;
+            Top = mainwin.Top + (mainwin.Height - Height) / 2;
+            TB_Search.Focus();
+        }
+
+        private void Window_MouseDown(object sender, MouseButtonEventArgs e)
+        {
+            if (e.ChangedButton == MouseButton.Left) DragMove();
+        }
+
+        private void TB_Search_TextChanged(object sender, TextChangedEventArgs e)
+        {
+            textchanged = true;
+        }
+
+        private void Btn_Search_Click(object sender, RoutedEventArgs e)
+        {
+            if (TB_Search.Text.Trim() == "")
+                Close();
+            else
+            {
+                var mainwin = (MainWindow)Application.Current.MainWindow;
+                if (textchanged)
+                {
+                    textchanged = false;
+                    MarkTextInRange(mainwin.RTB_Main, TB_Search.Text, false);
+                }
+                else
+                {
+                    MarkTextInRange(mainwin.RTB_Main, TB_Search.Text, true);
+                }
+                Activate();
+            }
+        }
+
+        private void Btn_Cancel_Click(object sender, RoutedEventArgs e)
+        {
+            Close();
+        }
+    }
+}

obj/Debug/DesktopNote.csproj.FileListAbsolute.txt

@@ -10,3 +10,5 @@ F:\GitHub Repos\DesktopNote\obj\Debug\MainWindow.g.cs
 F:\GitHub Repos\DesktopNote\obj\Debug\App.g.cs
 F:\GitHub Repos\DesktopNote\obj\Debug\DesktopNote_MarkupCompile.cache
 F:\GitHub Repos\DesktopNote\obj\Debug\DesktopNote_MarkupCompile.lref
+F:\GitHub Repos\DesktopNote\obj\Debug\Win_Search.baml
+F:\GitHub Repos\DesktopNote\obj\Debug\Win_Search.g.cs

obj/Debug/DesktopNote_MarkupCompile.cache

@@ -10,11 +10,11 @@ none
 false
 DEBUG;TRACE
 F:\GitHub Repos\DesktopNote\App.xaml
-11151548125
+2-90453093
 
-5-2017746502
+6-55149600
 14-53673721
-MainWindow.xaml;
+MainWindow.xaml;Win_Search.xaml;
 
 True
 

obj/Debug/DesktopNote_MarkupCompile.i.cache

@@ -10,11 +10,11 @@ none
 false
 DEBUG;TRACE
 F:\GitHub Repos\DesktopNote\App.xaml
-11151548125
+2-90453093
 
-9588776438
+10-1743593956
 14-53673721
-MainWindow.xaml;
+MainWindow.xaml;Win_Search.xaml;
 
-True
+False
 

obj/Debug/Win_Search.g.cs

@@ -0,0 +1,142 @@
+#pragma checksum "..\..\Win_Search.xaml" "{406ea660-64cf-4c82-b6f0-42d48172a799}" "60D5F737ADB076ED6A0D66C799181A8C"
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Diagnostics;
+using System.Windows;
+using System.Windows.Automation;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Ink;
+using System.Windows.Input;
+using System.Windows.Markup;
+using System.Windows.Media;
+using System.Windows.Media.Animation;
+using System.Windows.Media.Effects;
+using System.Windows.Media.Imaging;
+using System.Windows.Media.Media3D;
+using System.Windows.Media.TextFormatting;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+using System.Windows.Shell;
+
+
+namespace DesktopNote {
+
+
+    /// <summary>
+    /// Win_Search
+    /// </summary>
+    public partial class Win_Search : System.Windows.Window, System.Windows.Markup.IComponentConnector {
+
+
+        #line 8 "..\..\Win_Search.xaml"
+        [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1823:AvoidUnusedPrivateFields")]
+        internal System.Windows.Controls.TextBox TB_Search;
+
+        #line default
+        #line hidden
+
+
+        #line 9 "..\..\Win_Search.xaml"
+        [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1823:AvoidUnusedPrivateFields")]
+        internal System.Windows.Controls.Button Btn_Search;
+
+        #line default
+        #line hidden
+
+
+        #line 10 "..\..\Win_Search.xaml"
+        [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1823:AvoidUnusedPrivateFields")]
+        internal System.Windows.Controls.Button Btn_Cancel;
+
+        #line default
+        #line hidden
+
+        private bool _contentLoaded;
+
+        /// <summary>
+        /// InitializeComponent
+        /// </summary>
+        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [System.CodeDom.Compiler.GeneratedCodeAttribute("PresentationBuildTasks", "4.0.0.0")]
+        public void InitializeComponent() {
+            if (_contentLoaded) {
+                return;
+            }
+            _contentLoaded = true;
+            System.Uri resourceLocater = new System.Uri("/DesktopNote;component/win_search.xaml", System.UriKind.Relative);
+
+            #line 1 "..\..\Win_Search.xaml"
+            System.Windows.Application.LoadComponent(this, resourceLocater);
+
+            #line default
+            #line hidden
+        }
+
+        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [System.CodeDom.Compiler.GeneratedCodeAttribute("PresentationBuildTasks", "4.0.0.0")]
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes")]
+        [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")]
+        [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1800:DoNotCastUnnecessarily")]
+        void System.Windows.Markup.IComponentConnector.Connect(int connectionId, object target) {
+            switch (connectionId)
+            {
+            case 1:
+
+            #line 4 "..\..\Win_Search.xaml"
+            ((DesktopNote.Win_Search)(target)).MouseDown += new System.Windows.Input.MouseButtonEventHandler(this.Window_MouseDown);
+
+            #line default
+            #line hidden
+
+            #line 4 "..\..\Win_Search.xaml"
+            ((DesktopNote.Win_Search)(target)).Loaded += new System.Windows.RoutedEventHandler(this.Window_Loaded);
+
+            #line default
+            #line hidden
+            return;
+            case 2:
+            this.TB_Search = ((System.Windows.Controls.TextBox)(target));
+
+            #line 8 "..\..\Win_Search.xaml"
+            this.TB_Search.TextChanged += new System.Windows.Controls.TextChangedEventHandler(this.TB_Search_TextChanged);
+
+            #line default
+            #line hidden
+            return;
+            case 3:
+            this.Btn_Search = ((System.Windows.Controls.Button)(target));
+
+            #line 9 "..\..\Win_Search.xaml"
+            this.Btn_Search.Click += new System.Windows.RoutedEventHandler(this.Btn_Search_Click);
+
+            #line default
+            #line hidden
+            return;
+            case 4:
+            this.Btn_Cancel = ((System.Windows.Controls.Button)(target));
+
+            #line 10 "..\..\Win_Search.xaml"
+            this.Btn_Cancel.Click += new System.Windows.RoutedEventHandler(this.Btn_Cancel_Click);
+
+            #line default
+            #line hidden
+            return;
+            }
+            this._contentLoaded = true;
+        }
+    }
+}
+