To solve this, I can imagine I need to use PRISM or a datatemplate selector. I'm not really sure. Well, let me explain my situation. I've got this class called BinaryProblem and is the model.
public class BinaryProblem<T> {
public T Number1 { get; set; }
public T Number2 { get; set; }
}
BinaryProblem is a generic class, so T can be int, double, decimal, or inclussive another one, Fraction
.
public class Fraction {
public int Numerator {get;set;}
public int Denominator {get;set;}
}
The point is was thinking create a view for the primitive datatypes and another one for the fraction. This is the view:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<..Something.. Text="{Binding Number1}" Grid.Column="0" />
<TextBlock Grid.Column="1" Text="+" />
<..Something.. Text="{Binding Number2}" Grid.Column="2" />
</Grid>
Where says <..Something..>
, I do not know what to do. The idea is, if T
is a primitive datatype should draw only a textblock; but if is a Fraction datatype should show the next template or something like this:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<TextBlock Grid.Row="0" Text="{Binding Numerator}" />
<Rectangle Grid.Row="1" Fill="Black" Height="5" />
<TextBlock Grid.Row="2" Text="{Binding Denominator}" />
</Grid>
I don't want to create two views, I guess is it possible to avoid create two views? I mean, to have only one view and detect if must show an fraction template or the textblock.
Try this: First create data templates for the supported types:
<DataTemplate DataType="{x:Type local:Fraction}" >
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<TextBlock Grid.Row="0" Text="{Binding Numerator}" />
<Rectangle Grid.Row="1" Fill="Black" Height="5" />
<TextBlock Grid.Row="2" Text="{Binding Denominator}" />
</Grid>
</DataTemplate>
<DataTemplate xmlns:sys="clr-namespace:System;assembly=mscorlib"
DataType="{x:Type sys:Int32}" >
<TextBlock Background="Green" Text="{Binding}" />
</DataTemplate>
Then replace the 'Something' part with a ContentPresenter:
<ContentPresenter Grid.Column="0" Content="{Binding Number1}">