private void ItemCreate_Click(object sender, RoutedEventArgs e)
{
AddItem addItem = new AddItem(); //create your new form.
addItem.Show(); //show the new form.
this.Close();
}
private void BtnEdit_Click(object sender, RoutedEventArgs e)
{
object item = dataGridView.SelectedItem;
string setValueForTxtId = (dataGridView.SelectedCells[0].Column.GetCellContent(item) as TextBlock).Text;
string setValueForTxtName = (dataGridView.SelectedCells[1].Column.GetCellContent(item) as TextBlock).Text;
string setValueForTxtDescription = (dataGridView.SelectedCells[2].Column.GetCellContent(item) as TextBlock).Text;
string setValueForTxtPrice = (dataGridView.SelectedCells[3].Column.GetCellContent(item) as TextBlock).Text;
AddItem ec = new AddItem(setValueForTxtId, setValueForTxtName, setValueForTxtDescription, setValueForTxtPrice);
ec.Show();
this.Close();
}