在 C# wpf 中访问 DataGrid 的编辑单元格

Question

I made a Datagrid with XAML:

<DataGrid Name="dataGridBlockRow" Width="Auto" AutoGenerateColumns="False" VirtualizingStackPanel.IsVirtualizing="False" 
  CanUserReorderColumns="False" CanUserAddRows="false" CanUserDeleteRows="false" VerticalScrollBarVisibility="Visible"
  BeginningEdit="dataGridBlockRow_BeginningEdit"
  LoadingRow="gridColumns_LoadingRow" Grid.Column="1" Grid.Row="2">
    <DataGrid.Columns>
        <DataGridTemplateColumn Header="Row Number" MinWidth="120" Width="1*">
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <TextBlock Margin="0" Text="{Binding Path=RowNumber}">
                    </TextBlock>
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
            <DataGridTemplateColumn.CellEditingTemplate>
                <DataTemplate>
                    <toolkit:UIntegerUpDown Name="InputNumber" Value="{Binding Path=RowNumber, Mode=TwoWay}" AllowTextInput="False">
                    </toolkit:UIntegerUpDown>
                </DataTemplate>
            </DataGridTemplateColumn.CellEditingTemplate>
        </DataGridTemplateColumn>
        <DataGridTemplateColumn Header="Tree Count" MinWidth="120" Width="1*">
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <TextBlock Margin="0" Text="{Binding Path=TreeCount}">
                    </TextBlock>
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
            <DataGridTemplateColumn.CellEditingTemplate>
                <DataTemplate>
                    <toolkit:UIntegerUpDown Name="inputTree" Value="{Binding Path=TreeCount, Mode=TwoWay}">
                    </toolkit:UIntegerUpDown>
                </DataTemplate>
            </DataGridTemplateColumn.CellEditingTemplate>
        </DataGridTemplateColumn>
    </DataGrid.Columns>
</DataGrid>

in c# code I added a List to my DataGrid:

 List<BlockRow> blockRowList = new List<BlockRow>(); dataGridBlockRow.ItemsSource = blockRowList;

I want to Access the input control InputNumber and InputTree . How can I access the current Editing Cell Input TextBox?

Answer 1

In WPF better to avoid change controls inside DataTemplate.
But if you want to get reference you can use FindName method of dataTemplate.

public static Control GetControlFromCellEditingTemplate(this DataGridColumn column, string controlName)
{
   DataTemplate template = column.CellEditingTemplate;   
   return template.FindName(controlName, column);
} 

you can use it like

var inputNumberUpDown = ((DataGridColumn)dataGridBlockRow.Columns[0]).GetControlFromCellEditingTemplate("InputNumber") as UIntegerUpDown;
var inputTreeUpDown = ((DataGridColumn)dataGridBlockRow.Columns[1]).GetControlFromCellEditingTemplate("inputTree") as UIntegerUpDown;