TextBlock双击事件

<DataGridTemplateColumn Width="*" Header="内标">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <Grid>
                <TextBlock
                    Background="Transparent"
                    Tag="{Binding InternalId}"
                    Text="{Binding InternalId}">
                    <TextBlock.InputBindings>
                        <MouseBinding
                            Command="{Binding DataContext.InternalClickCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}}"
                            CommandParameter="{Binding}"
                            MouseAction="LeftDoubleClick" />
                    </TextBlock.InputBindings>
                </TextBlock>
            </Grid>
        </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

Button点击事件

<DataGridTemplateColumn Width="*" Header="内标">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <Grid>
                <Button
    Background="Transparent"
    BorderBrush="Transparent"
    Command="{Binding Path=DataContext.InternalClickCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}}"
    Content="{Binding InternalId}"
    Tag="{Binding InternalId}" />
            </Grid>
        </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

 [RelayCommand]
 private void InternalClick(GuantifyCompound guantifyCompound)
 {
     MessageBox.Show("=InternalClick=" + guantifyCompound.LeftWidth);
 }