CODEWITHSUNDEEP
wpfdatagrid
Shahin
Shahin

Reputation: 12843

WPF : DataGrid Get checked columns

I've a DataGrid that is bound to a Datatable object. DataGrid generates columns automatically. 

        <DataGrid 
                Name="TimeTableDataGrid"
                      AutoGeneratingColumn="TimeTableDataGrid_OnAutoGeneratingColumn"
                      ItemsSource="{Binding TimeTable,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged,IsAsync=True}"
                      EnableRowVirtualization="True"
                      EnableColumnVirtualization="True"
                      VirtualizingStackPanel.IsVirtualizing="True">
            </DataGrid>

I've use AutoGeneratingColumn event to add checkbox in DataGrid columns .

       private void TimeTableDataGrid_OnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
    {
            e.Column.Width = new DataGridLength(_columnWidth);
            e.Column.HeaderTemplate = (DataTemplate) Resources["HeaderTemplate"];

    }

HeaderTemplate : 

   <DataTemplate x:Key="HeaderTemplate"
                  x:Name="HeaderTemplate">
        <CheckBox></CheckBox>
    </DataTemplate>

enter image description here

How can I determine that which checkboxes are selected ?

Upvotes: 0

Views: 477

Answers (1)

Nitin Purohit
Nitin Purohit

Reputation: 18580

you can create the style for your header and update your checkbox like below:

          <Style x:Key="HeaderStyle"  TargetType="{x:Type DataGridColumnHeader}">
                        <Style.Setters>
                            <Setter Property="Template">
                                <Setter.Value>
                                    <ControlTemplate TargetType="{x:Type DataGridColumnHeader}">

                                        <CheckBox Command="{Binding DataContext.MyCommand, RelativeSource={RelativeSource AncestorType={x:Type Window}}}" CommandParameter="{TemplateBinding Content}"></CheckBox>


                                    </ControlTemplate>
                                </Setter.Value>
                            </Setter>
                        </Style.Setters>
                    </Style>

and update your autogenererating handler as :

            e.Column.Width = new DataGridLength(_columnWidth);
            e.Column.Header = e.PropertyName;
            e.Column.HeaderStyle = (Style)Resources["HeaderStyle"];

so here you can bind the Command for checkbox to your viewmodel command and send the unique commandparameter that can be header. In viewmodel you can have list (of string). In the command handler you can upate that list to contain which header's checkbox is checked/unchecked

Thanks

Upvotes: 1

Related Questions