DataGrid SelectedItem Binding

Question

Below is the code behind in my view model:

private DataRow selectedErrorRow;
public DataRow SelectedErrorRow
{
    get { return selectedErrorRow; }
    set { selectedErrorRow = value; base.RaisePropertyChanged("SelectedErrorRow"); }
}

Then this in my view:

<DataGrid SelectedItem="{Binding SelectedErrorRow,Mode=TwoWay}"

The binding somewhat works... It "gets" the value when the datagrid is drawn but it never sets it when a new value is selected/highlighted.... Any ideas?

Note the item source for the datagrid is a DataTable.

EDIT: The Datagrid is in a PopUp, when the datagrid gets drawn it will get the binded value (null). However once I selected/highlight a row it will NOT 'set' anything. It will however 'set' the binded value null when its redrawn (the popup is open, i selected a row, close it,and reopen it). The thing is It never sets the value to anything but null, and it only sets it during the secound time its drawn.

Could you show the line of Code/XAML which sets ItemsSource of your Grid? — user572559
ItemsSource="{Binding DataRowsWithErrors}" DataRowsWithErrors is a DataTable — user1145927
Looks like a DataContext issue. DataRowsWithErrors belongs to your DataContext (it's an MV property likely) do you have SelectedErrorRow located at the same logical level? — user572559
I'm not 100% sure what your asking. But both DataRowsWithErrors and selectedErrorRow are located in the same ViewModel. I don't think its a DataContext issue? — user1145927
put a breakpoint inside your DP Value Changed event handler for your grid and see if your its SelectedItem ever gets changed. — user572559

user1145927 user1145927 · Accepted Answer · 2012-01-18T13:15:37

I needed to change what I was binding to. It needs to bind to a DataRowView and not a DataRow.

DataGrid SelectedItem Binding

3 Answers