[WPF] Format column text for showing percentage

Question

Hi,
in one column of my DataGrid I show percentage values.
From database, I get the number:
- in view, I would concatenate the char "%"
- in edit, the user add his value and when mouse leaves cell automatically is concatenated the char "%"
How can I implement it?
Thanks.

Answer 1

Replace any DataGridTextColumn with a DataGridTemplateColumn and specify a StringFormat for the TextBlock in the CellTemplate only:
<DataGrid.Columns>
<!--<DataGridTextColumn Binding="{Binding Val, StringFormat=P}"/>-->
<DataGridTemplateColumn>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Val, StringFormat='\{0\}%'}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<TextBox Text="{Binding Val}"/>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
Note that the "number" source property must be an int, double, decimal etc. for the StringFormat to get applied.
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