DataGridTemplateColumn Two way binding is not working
I had the same problem, not updating the source:
<DataGridTemplateColumn Header="Obs" IsReadOnly="False"> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <TextBox Name="txtObs" Width="80" Text="{Binding Path=ObsPedido, Mode=TwoWay}"/> </DataTemplate> </DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn>For me it worked just adding UpdateSourceTrigger=PropertyChanged
<TextBox Name="txtObs" Width="80" Text="{Binding Path=ObsPedido, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
I had the same problem and the solution posted by @jrivam did not help. For me to get my binding to work correctly I had to change the CellEditingTemplate to use the OneWayToSource Binding Mode.
<DataGridTemplateColumn.CellEditingTemplate> <DataTemplate> <TextBox Text="{Binding Path=IC_DEF_CHAR_TEXT, Mode=OneWayToSource, UpdateSourceTrigger=PropertyChanged}"/> </DataTemplate></DataGridTemplateColumn.CellEditingTemplate>