CsvView: Allow selection of texts

Instead of disabling textboxes, we use the readonly feature.

CsvView/MainWindow.axaml

@@ -12,14 +12,14 @@
     <Grid RowDefinitions="Auto,Auto,*">
         <StackPanel Orientation="Horizontal" Grid.Row="0">
             <Button Name="BtnLoad" Click="BtnLoad_OnClick">...</Button>
-            <TextBlock Name="TxtFileName" />
+            <TextBox Name="TxtFileName" IsReadOnly="true" />
         </StackPanel>
         <StackPanel Orientation="Horizontal" Grid.Row="1">
             <Button Name="BtnFirst" Click="BtnFirst_OnClick">|◁</Button>
             <Button Name="BtnPrevious" Click="BtnPrevious_OnClick">◁</Button>
             <TextBox Name="TxtIndex" Text="{Binding Index}" TextChanged="TxtIndex_OnTextChanged"></TextBox>
             <TextBlock>/</TextBlock>
-            <TextBox Name="TxtMaxIndex" Text="{Binding MaxIndex}" IsEnabled="false"></TextBox>
+            <TextBox Name="TxtMaxIndex" Text="{Binding MaxIndex}" IsReadOnly="true"></TextBox>
             <Button Name="BtnNext" Click="BtnNext_OnClick">▷</Button>
             <Button Name="BtnLast" Click="BtnLast_OnClick">▷|</Button>
         </StackPanel>
@@ -28,7 +28,7 @@
                 <ItemsControl ItemsSource="{Binding Fields}">
                     <ItemsControl.DataTemplates>
                         <DataTemplate x:DataType="csvView:FieldViewModel">
-                            <TextBox Text="{Binding Text}" IsEnabled="False"/>
+                            <TextBox Text="{Binding Text}" IsReadOnly="true" />
                         </DataTemplate>
                     </ItemsControl.DataTemplates>
                 </ItemsControl>

CsvView/MainWindow.axaml.cs

@@ -104,7 +104,7 @@ public partial class MainWindow : Window
             _currentReg = -1;
             BtnFirst.IsEnabled = false;
             BtnPrevious.IsEnabled = false;
-            TxtIndex.IsEnabled = false;
+            TxtIndex.IsReadOnly = true;
             BtnNext.IsEnabled = false;
             BtnLast.IsEnabled = false;
 
@@ -128,7 +128,7 @@ public partial class MainWindow : Window
 
         BtnFirst.IsEnabled = (first == false);
         BtnPrevious.IsEnabled = (first == false);
-        TxtIndex.IsEnabled = true;
+        TxtIndex.IsReadOnly = false;
         BtnNext.IsEnabled = (last == false);
         BtnLast.IsEnabled = (last == false);