WCF/WF - How to get the wpf datagrid cell value

private void dataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    DataGrid dataGrid = sender as DataGrid;
    if (e.AddedItems!=null && e.AddedItems.Count>0)
    {
        // find row for the first selected item
        DataGridRow row = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromItem(e.AddedItems[0]);
        if (row != null)
        {
            DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(row);
            // find grid cell object for the cell with index 0
            DataGridCell cell = presenter.ItemContainerGenerator.ContainerFromIndex(0) as DataGridCell;
            if (cell != null)
            {
                Console.WriteLine(((TextBlock)cell.Content).Text);
            }
        }
    }
}

static T GetVisualChild<T>(Visual parent) where T : Visual
{
    T child = default(T);
    int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
    for (int i = 0; i < numVisuals; i++)
    {
        Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
        child = v as T;
        if (child == null) child = GetVisualChild<T>(v);
        if (child != null) break;
    }
    return child;
}

hope this helps, regards

DataGrid is one kind of ItemsControl, so it has the Items property and the ItemContainer that wraps the item. It is different with DataGridView in Windows Forms, the DataGridRow is an item in the Items collection and the cell is wrapped in a DataGridCellsPresenter structure; so we cannot get the cell content like DataGridView.Rows.Cells. However, In WPF we can access to the element in the control through VisualTree, of cause can access the DataGridRow and the DataGridCellsPresenter in the DataGrid via VisualTree; and get the cell instance in the DataGridCellsPresenter.
 DataGridRow rowContainer = (DataGridRow)dataGrid1.ItemContainerGenerator.ContainerFromIndex(rowIndex);
DataGridCellsPresenter presenter = GetVisualChild(rowContainer);
DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);

// ...

public static T GetVisualChild<T>(Visual parent) where T : Visual
{
  T child = default(T);
  int numVisuals = VisualTreeHelper.GetChildrenCount(parent);

  for (int i = 0; i < numVisuals; i++)
  {
    Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
    child = v as T;
   
    if (child == null)
    child = GetVisualChild(v);
    else
    break;
  }

  return child;
}

  you can read datagrid cell value without ObservableCollection values. You can read all cell data of your datagrid. i have sample for you in which the grid
 

       contain a comboBox in it's cell.
 
       the XAML for the dataGrid:
 
     

 <cmbGenerator:DataGridComboLoad x:Key="MajorProblemCombo"/>
 <DataGrid AutoGenerateColumns="False" Height="100" Foreground="Red" HorizontalAlignment="Left" Margin="2,1,0,0"<br/>     Name="majorAreaDataGrid" VerticalAlignment="Top" Width="158" AlternatingRowBackground="#FFCAEBE7" RowBackground="{x:Null}" >
    <DataGrid.Background>
     <ImageBrush />
   </DataGrid.Background>
     <DataGrid.Columns>
      <DataGridTemplateColumn Header="Main criteria" Width="150">
      <DataGridTemplateColumn.CellTemplate>
       <DataTemplate>
       <TextBlock Text="{Binding MajorProblem}"></TextBlock>
        </DataTemplate>
      </DataGridTemplateColumn.CellTemplate>
      <DataGridTemplateColumn.CellEditingTemplate>
        <DataTemplate>
   <ComboBox Name="majorProblemComboBox" ItemsSource="{Binding Source={StaticResource MajorProblemCombo}}" <br/>   SelectedItem="{Binding MajorProblem,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Style="{StaticResource ComboBoxBGYellowGreen}"/>
        </DataTemplate>
      </DataGridTemplateColumn.CellEditingTemplate>
        </DataGridTemplateColumn>
        </DataGrid.Columns>
 </DataGrid>
 

and the C# code for your event:
 
 
 
 

   
   // Business logic class<br/>      FinalPrescriptionManager finalPrescriptionObj = new FinalPrescriptionManager();
      List<DoctorPrescription> listmajorCatagory = new List<DoctorPrescription>();
      int rowNo = 0;
      for (int row = 0; row < majorAreaDataGrid.Items.Count-1; row++)
      {
      try
      {
        DoctorPrescription docPresObj = new DoctorPrescription();
        docPresObj = (DoctorPrescription)(majorAreaDataGrid.Items[row]);
        rowNo++;
      }
      catch (Exception exception)
      {
        MessageBox.Show("Major problem dataGrid casting problem.", "Error-Casting", MessageBoxButton.OK, MessageBoxImage.Warning);
      }
      }
      if (majorAreaDataGrid.Items.Count > 1)
      {
      for (int count = 0; count < rowNo; count++)
      {
        DoctorPrescription doctorPresObj = new DoctorPrescription();
        try
        {
        doctorPresObj = (DoctorPrescription) (majorAreaDataGrid.Items[count]);
        listmajorCatagory.Add(doctorPresObj);
        }
        catch (Exception exception)
        {
        MessageBox.Show("Major problem DataGrid's cell data can't add in list.","Error-cell data adding in list",MessageBoxButton.OK,<br/>         MessageBoxImage.Warning);
        }
      }
   // Send the list in Business Logic Layer
      finalPrescriptionObj.SaveMagorCatagoryPrescription(listmajorCatagory);
      }
   
 

   Hope it will help you.