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I really broke my mind by trying to find how to format string when you are using DataGridTemplates:

<DataGridTemplateColumn Header="DEMOB. DATE">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate >
            <DatePicker SelectedDate="{Binding DemobDate,                 
    Mode=TwoWay,UpdateSourceTrigger=PropertyChanged,StringFormat='{}{0:dd/MMM/yy}'}"/>
    </DataTemplate>
  </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

For some reasons XAML code above not working when I use DataGridTemplates. Can someone please explain me where i did wrong.

P.S.

Evrything is works when I use:

<DataGridTextColumn Header="DEMOB. DATE" Binding="{Binding DemobDate, StringFormat='{}{0:dd/MMM/yyyy}',Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Width="90"/>

But I really need to have DatePicker in the cell, and as far as i understood my only option to have a DatePicker in the cell is to use DataGridTemplateColumn, and that where StringFormat option for some reason ignored.

Thanks, Maks!

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  • 3
    Possible duplicate of Changing the string format of the WPF DatePicker Commented May 25, 2018 at 7:14
  • Binding.StringFormat is ignored unless the target property is of type String. That's why ContentControl (hence its descendants Label etc.) has a ContentStringFormat property: Because ContentControl.Content is Object. Likewise, DatePicker.SelectedDate is naturally not a string. You'll find duplicates of this question about Label and other ContentControl descendants. Commented May 25, 2018 at 15:23
  • Try SelectedDateFormat="Short". Commented May 25, 2018 at 15:27
  • Ed,this is amazing!!! Thank you very much for pointing me to the right place, that helps to solve my problem! Commented May 26, 2018 at 4:30
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