private void chkUsedInThisAccountType_CheckedChanged(object sender, EventArgs e)
{
DataRow dr = gridViewStoreItemMatrix.GetFocusedDataRow();
int ID = int.Parse(dr["ID"].ToString());
BLL.ItemActivity itemActivity = new ItemActivity();
itemActivity.LoadByPrimaryKey(ID);
itemActivity.UsedInThisStore = !itemActivity.UsedInThisStore;
itemActivity.Save();
}
