WPF Datagrid 控制 第一行和第一列之间的空白

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这个位置就是 这里

我们更改 DataGridControltemplate 模板

看树形结构 里面是一个BUtton

功能是全选 能找到了 那就直接改掉就可以

<ControlTemplate x:Key="DataGridControlTemplate1" TargetType="{x:Type DataGrid}">
        	<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="True">
        		<ScrollViewer x:Name="DG_ScrollViewer" Focusable="False">
        			<ScrollViewer.Template>
        				<ControlTemplate TargetType="{x:Type ScrollViewer}">
        					<Grid>
        						<Grid.ColumnDefinitions>
        							<ColumnDefinition Width="Auto"/>
        							<ColumnDefinition Width="*"/>
        							<ColumnDefinition Width="Auto"/>
        						</Grid.ColumnDefinitions>
        						<Grid.RowDefinitions>
        							<RowDefinition Height="Auto"/>
        							<RowDefinition Height="*"/>
        							<RowDefinition Height="Auto"/>
        						</Grid.RowDefinitions>
        						<Button Width="208" Height="125.917" Command="ApplicationCommands.SelectAll" Focusable="False" Style="{DynamicResource {ComponentResourceKey ResourceId=DataGridSelectAllButtonStyle, TypeInTargetAssembly={x:Type DataGrid}}}">
        							<Button.Visibility>
        								<Binding Path="HeadersVisibility" RelativeSource="{RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type DataGrid}}">
        									<Binding.ConverterParameter>
        										<DataGridHeadersVisibility>All</DataGridHeadersVisibility>
        									</Binding.ConverterParameter>
        								</Binding>
        							</Button.Visibility>
        						</Button>
        						<DataGridColumnHeadersPresenter x:Name="PART_ColumnHeadersPresenter" Grid.Column="1">
        							<DataGridColumnHeadersPresenter.Visibility>
        								<Binding Path="HeadersVisibility" RelativeSource="{RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type DataGrid}}">
        									<Binding.ConverterParameter>
        										<DataGridHeadersVisibility>Column</DataGridHeadersVisibility>
        									</Binding.ConverterParameter>
        								</Binding>
        							</DataGridColumnHeadersPresenter.Visibility>
        						</DataGridColumnHeadersPresenter>
        						<ScrollContentPresenter x:Name="PART_ScrollContentPresenter" CanContentScroll="{TemplateBinding CanContentScroll}" CanHorizontallyScroll="False" Grid.ColumnSpan="2" CanVerticallyScroll="False" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}" Grid.Row="1"/>
        						<ScrollBar x:Name="PART_VerticalScrollBar" Grid.Column="2" Maximum="{TemplateBinding ScrollableHeight}" Orientation="Vertical" Grid.Row="1" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" ViewportSize="{TemplateBinding ViewportHeight}"/>
        						<Grid Grid.Column="1" Grid.Row="2">
        							<Grid.ColumnDefinitions>
        								<ColumnDefinition Width="{Binding NonFrozenColumnsViewportHorizontalOffset, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type DataGrid}}}"/>
        								<ColumnDefinition Width="*"/>
        							</Grid.ColumnDefinitions>
        							<ScrollBar x:Name="PART_HorizontalScrollBar" Grid.Column="1" Maximum="{TemplateBinding ScrollableWidth}" Orientation="Horizontal" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" Value="{Binding HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" ViewportSize="{TemplateBinding ViewportWidth}"/>
        						</Grid>
        					</Grid>
        				</ControlTemplate>
        			</ScrollViewer.Template>
        			<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
        		</ScrollViewer>
        	</Border>
        </ControlTemplate>

改这个就可以

<Button Width="208" Height="125.917" Command="ApplicationCommands.SelectAll" Focusable="False" Style="{DynamicResource {ComponentResourceKey ResourceId=DataGridSelectAllButtonStyle, TypeInTargetAssembly={x:Type DataGrid}}}">
        							<Button.Visibility>
        								<Binding Path="HeadersVisibility" RelativeSource="{RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type DataGrid}}">
        									<Binding.ConverterParameter>
        										<DataGridHeadersVisibility>All</DataGridHeadersVisibility>
        									</Binding.ConverterParameter>
        								</Binding>
        							</Button.Visibility>
        						</Button>

WPF Datagrid 控制 第一行和第一列之间的空白

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原文地址：https://www.cnblogs.com/lonelyxmas/p/12075413.html