Fix: DataGrid last column resize to view width

Source/NETworkManager/Views/DNSLookupView.xaml

@@ -84,7 +84,7 @@
                 <TextBlock Grid.Column="8" Grid.Row="0" Text="{x:Static localization:Strings.Type}"
                            Style="{DynamicResource DefaultTextBlock}" VerticalAlignment="Center" />
                 <ComboBox x:Name="ComboBoxTypes" Grid.Column="10" Grid.Row="0" ItemsSource="{Binding QueryTypes}"
-                          SelectedItem="{Binding QueryType}" Width="80" HorizontalAlignment="Left" />
+                          SelectedItem="{Binding QueryType}" Width="100" HorizontalAlignment="Left" />
                 <Button Grid.Column="12" Grid.Row="0" Command="{Binding QueryCommand}"
                         IsDefault="{Binding IsRunning, Converter={StaticResource BooleanReverseConverter}}"
                         HorizontalAlignment="Right">
@@ -148,9 +148,11 @@
                        Style="{DynamicResource StatusMessageTextBlock}" Margin="0,10,0,0" />
         </Grid>
         <TextBlock Grid.Row="2" Text="{x:Static localization:Strings.Result}" Style="{StaticResource HeaderTextBlock}" />
-        <controls:MultiSelectDataGrid Grid.Row="3" ItemsSource="{Binding ResultsView}"
+        <controls:MultiSelectDataGrid x:Name="DataGridResults" Grid.Row="3"
+                                      ItemsSource="{Binding ResultsView}"
                                       SelectedItem="{Binding SelectedResult}"
-                                      SelectedItemsList="{Binding SelectedResults, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">
+                                      SelectedItemsList="{Binding SelectedResults, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
+                                      LoadingRow="DataGridResults_LoadingRow">
             <controls:MultiSelectDataGrid.Resources>
                 <ContextMenu x:Key="RowContextMenu" Opened="ContextMenu_Opened" MinWidth="150">
                     <MenuItem Header="{x:Static Member=localization:Strings.CopyDots}"
@@ -254,7 +256,14 @@
                 <DataGridTextColumn Header="{x:Static localization:Strings.Result}"
                                     Binding="{Binding Path=(network:DNSLookupRecordInfo.Result)}"
                                     SortMemberPath="Result"
-                                    MinWidth="200" />
+                                    MinWidth="200"
+                                    Width="*">
+                    <DataGridTextColumn.ElementStyle>
+                        <Style>
+                            <Setter Property="TextBlock.TextWrapping" Value="Wrap" />
+                        </Style>
+                    </DataGridTextColumn.ElementStyle>
+                </DataGridTextColumn>
             </controls:MultiSelectDataGrid.Columns>
         </controls:MultiSelectDataGrid>
     </Grid>

Source/NETworkManager/Views/DNSLookupView.xaml.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Threading;
 using NETworkManager.Controls;
 using NETworkManager.ViewModels;
 
@@ -31,6 +32,27 @@ private void UserControl_Loaded(object sender, RoutedEventArgs e)
         _viewModel.OnLoaded();
     }
 
+    // Force star-sized DataGrid columns to recompute on first row load. Without this, an
+    // initially empty DataGrid sizes star columns to MinWidth because the inner ScrollViewer
+    // measures with infinite width; only a window resize triggers a correct re-measure.
+    private void DataGridResults_LoadingRow(object sender, DataGridRowEventArgs e)
+    {
+        DataGridResults.LoadingRow -= DataGridResults_LoadingRow;
+
+        Dispatcher.BeginInvoke(new Action(() =>
+        {
+            foreach (var column in DataGridResults.Columns)
+            {
+                if (!column.Width.IsStar)
+                    continue;
+
+                var width = column.Width;
+                column.Width = 0;
+                column.Width = width;
+            }
+        }), DispatcherPriority.ContextIdle);
+    }
+
     private void Dispatcher_ShutdownStarted(object sender, EventArgs e)
     {
         _viewModel.OnClose();