From e11e8f59ea06872a5fea500a88e4ce203df44887 Mon Sep 17 00:00:00 2001
From: Harald Daltveit <JyslaFancy@users.noreply.github.com>
Date: Fri, 12 Jun 2026 15:59:49 +0200
Subject: [PATCH] fix(DataGrid): add
 VerticalContentAlignment/HorizontalContentAlignment to DataGridCell
 ContentPresenter
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The MaterialDesignDataGridCell ControlTemplate's ContentPresenter was missing
bindings for VerticalContentAlignment and HorizontalContentAlignment. This meant
users could not properly vertically center cell content using the standard
VerticalContentAlignment property, leading them to misuse VerticalAlignment
instead — which caused the DataGridCell to shrink within its row, exposing
DataGrid grid lines as unwanted 'extra border lines' above and below the cell.

Fix: Added HorizontalAlignment and VerticalAlignment TemplateBindings to the
ContentPresenter, matching the pattern already used in DataGridColumnHeader.

Fixes #3999
---
 .../Themes/MaterialDesignTheme.DataGrid.xaml                 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.DataGrid.xaml b/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.DataGrid.xaml
index fb0e3a3216..80903929ef 100644
--- a/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.DataGrid.xaml
+++ b/src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.DataGrid.xaml
@@ -259,7 +259,10 @@
                     BorderBrush="{TemplateBinding BorderBrush}"
                     BorderThickness="{TemplateBinding BorderThickness}"
                     SnapsToDevicePixels="True" />
-            <ContentPresenter Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
+            <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                              VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
+                              Margin="{TemplateBinding Padding}"
+                              SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
           </Grid>
         </ControlTemplate>
       </Setter.Value>