<DataGrid x:Name="grdExcel" Grid.Row="1" Padding="5,15,5,10" IsReadOnly="True" AutoGenerateColumns="True"
                      ItemsSource="{Binding  MyDataTableFromExcel,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
                      VerticalAlignment="Center" >

public List<CError> ErrorInSheet {get;set;}

     public void LoadData()
    {
        Sheets= GetSheetsFromExcel(PathExcel);
        SelectedSheet= Sheets.FirstOrDefault();
        MyDataTableFromExcel= LoadDataFromSheet(PathExcel, SelectedSheet);
        ErrorInSheet=ValidateData(MyDataTableFromExcel);

    }

public class CErrorExcel
{
    public int row { get; set; }
    public int col { get; set; }
    public string Error { get; set; }
}