[WPF] Show ComboBox or DatePicker according to the selected value in a combobox

Question

Hi,
in my DataGrid:
1) in one column I have a ComboBox: item1, item2
2) in another column I would show a:
- a list if the user select item1 in the ComboBox 
- a datepicker if the user select item2 in the Combobox 
In XAML i have:
<!-- COLUMN 1 -->
<DataGridTemplateColumn Header="{StaticResource datagridScheduled}" SortMemberPath="Type.Description">
<DataGridTemplateColumn.CellTemplate >
<DataTemplate>
<TextBlock Name="dgScheduleType" Text="{Binding Type.Description, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<ComboBox Name="dgCmbTypeOfSchedule"
ItemsSource="{Binding Source={StaticResource DomainDataViewModel}, Path=SchedTypes}"
SelectedItem="{Binding Type, Mode=TwoWay}"
SelectedValue="{Binding Type.Description}"
DisplayMemberPath="Description"
SelectedValuePath="Description">
</ComboBox>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
<!-- COLUMN 2 -->
<DataGridTemplateColumn Header="{StaticResource datagridDay}">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Day, Mode=TwoWay}" />
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<ComboBox Name="dgCmbDay" DataContext="{Binding}" SelectedItem="{Binding Day}">
<ComboBox.ItemsSource>
<MultiBinding Converter="{StaticResource DateNumNameConverter}" >
<MultiBinding.Bindings>
<Binding ElementName="dgPlan" Path="CurrentItem"/>
<Binding Source="{StaticResource AnalysisPlanViewModel}" Path="ListDayNameOfWeek"/>
<Binding Source="{StaticResource AnalysisPlanViewModel}" Path="ListDayNumOfMonth"/>        
<Binding Path="Items"></Binding>
</MultiBinding.Bindings>
</MultiBinding>
</ComboBox.ItemsSource>
</ComboBox>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
In my Convert, I check the value select in dgCmbTypeOfSchedule and the convert returns one list or the other.
But, If I would that the convert returns a datepicker, it's possibile?
Thanks.

Answer 1

Hello robertino_salemi,
It is a depended on the meaning of your "datepicker" and I know some articles which can be shared to you. Please check the following blog first to see how to convert datapicker value:
https://michaelmairegger.wordpress.com/2010/02/01/binding-null-value-of-datetime-to-datepicker/
And also the following place:
http://stackoverflow.com/questions/4542291/datepicker-selecteddate-not-changing-when-text-is-input
As you can see, we can use the following converter:
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
string strValue = System.Convert.ToString(value);
DateTime resultDateTime;
if (DateTime.TryParse(strValue, out resultDateTime))
return resultDateTime;
return value;
<Controls:DatePicker
Text="{Binding OrderDate,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
SelectedDate="{Binding RelativeSource={RelativeSource Self},Path=Text,
Converter={StaticResource DateConverter}}">
So if you want to convert datapicker date, I think it is OK. If you want to show or hide a datepicker, it is also OK. But what do you mean of "convert returns a datepicker", return a control?
Best regards,
Barry
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