WPF DataGrid cell value changed event

You can achieve this by Using CellEditEnding event and another thing is in DataGridTextColumn have to add some attributes like below :-

<DataGrid x:Name="myDG" CellEditEnding="myDG_CellEditEnding"  ItemsSource="{Binding}" AutoGenerateColumns="False" Margin="10,10,182,0" VerticalAlignment="Top" Height="329" ClipboardCopyMode="IncludeHeader">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Col1" Binding="{Binding Prop1}" 
 IsReadOnly="True"/>
 <DataGridTextColumn x:Name="dataGridTextColumn"Header="Col2" Binding="{Binding Prop2,  UpdateSourceTrigger=LostFocus, Mode=TwoWay}" Width="*" />
    </DataGrid.Columns>
</DataGrid>

IN C#

 private void myDG_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e) {
            string prop1 = (e.Row.Item as DataRowView).Row[1].ToString();
        }

The solution was to catch the CellEditEnding event.

// In initialization
myDG.CellEditEnding += myDG_CellEditEnding;

void myDG_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
{
    if (e.EditAction == DataGridEditAction.Commit)
    {
        var column = e.Column as DataGridBoundColumn;
        if (column != null)
        {
            var bindingPath = (column.Binding as Binding).Path.Path;
            if (bindingPath == "Col2")
            {
                int rowIndex = e.Row.GetIndex();
                var el = e.EditingElement as TextBox;
                // rowIndex has the row index
                // bindingPath has the column's binding
                // el.Text has the new, user-entered value
            }
        }
    }
}