How to pass CommandParameter in CellTemplate?

Hello,

The ComboBoxEdit popup doesn't belong to the Window visual tree, therefore the binding your posted doesn't work. To accomplish this task, you can change your binding as follows:

XAML
<cmd:EventToCommand  
                                        Command="{Binding Path=View.DataContext.ImportCommand}"  
                                        CommandParameter="{Binding Path=View.DataControl.Parent.Title}"/>  

Please also note that if you are using GridColumn.CellTemplate, the most suitable solution to use it is to set the editors name to "PART_Editor" and remove its EditValue property binding. For example:

XAML
<dxg:GridColumn.CellTemplate>  
                  <DataTemplate>  
                      <dxe:ComboBoxEdit Name="PART_Editor" IsTextEditable="False" >  
                          <dxe:ComboBoxEditItem x:Name="readyCombox" Content="ClickDownComboxItem">  
                              <i:Interaction.Triggers>  
                                  <i:EventTrigger EventName="PreviewMouseDown">  
                                      <cmd:EventToCommand  
                                           Command="{Binding Path=View.DataContext.ImportCommand}"  
                                           CommandParameter="{Binding Path=View.DataControl.Parent.Title}"/>  
                                  </i:EventTrigger>  
                              </i:Interaction.Triggers>  
                          </dxe:ComboBoxEditItem>  
                      </dxe:ComboBoxEdit>  
                  </DataTemplate>  
              </dxg:GridColumn.CellTemplate>  

Please try this solution and let me know whether or not it meets your requirements.

I am looking forward to your response.

Thanks,
Andrew

Thanks you very much.Now, I may pass "Title" CommandParameter in CellTemplate
I still has some questions.If I want to bind noTB01.Text property with CommandParameter.How to do it ?
Here is my xaml.

XAML
<Window x:Class="OddEvenRows.Window1"  
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
        xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"  
        Height="400" Width="300"  
        xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"  
        xmlns:cmd="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras"  
        xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity" Title="JackSlater" x:Name="jackWindow">  
    <StackPanel>  
        <StackPanel>  
            <TextBlock x:Name="noTB01" Text="No.1"></TextBlock>  
            <TextBlock x:Name="noTB02" Text="No.2"></TextBlock>  
            <Button x:Name="testBtn" Content="Hello"></Button>  
        </StackPanel>  
        <Grid>  
            <dxg:GridControl x:Name="gridControl" Grid.Row="2" ItemsSource="{Binding MyList,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}">  
                <dxg:GridControl.Columns>  
                    <dxg:GridColumn FieldName="Index">  
                        <dxg:GridColumn.CellTemplate>  
                            <DataTemplate>  
                                <dxe:ComboBoxEdit EditValue="{Binding Data.Index,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" IsTextEditable="False" >  
                                    <dxe:ComboBoxEditItem x:Name="readyCombox" Content="ClickDownComboxItem">  
                                        <i:Interaction.Triggers>  
                                            <i:EventTrigger EventName="PreviewMouseDown">  
                                                <cmd:EventToCommand  
                                             Command="{Binding Path=View.DataContext.ImportCommand}"  
                                             CommandParameter="{Binding Path=View.DataControl.Parent.Text}"/>  
                                            </i:EventTrigger>  
                                        </i:Interaction.Triggers>  
                                    </dxe:ComboBoxEditItem>  
                                </dxe:ComboBoxEdit>  
                            </DataTemplate>  
                        </dxg:GridColumn.CellTemplate>  
                    </dxg:GridColumn>  
                </dxg:GridControl.Columns>  
                <dxg:GridControl.View>  
                    <dxg:TableView AutoWidth="True"/>  
                </dxg:GridControl.View>  
            </dxg:GridControl>  
        </Grid>  
    </StackPanel>  
</Window>