private void loadAllCombo() { if (bllReference.getdtFinish(ref dtFinish) != 0) { return; } bllReference.dtFinish = dtFinish; DataContext = bllReference; if (bllReference.getdtCoating(ref dtCoating) != 0) { return; } bllReference.dtCoating = dtCoating; if (bllProInfo.GetForecastLocation(ref dtForecastLocation) != 0) { return; } bllReference.ForecastLocation = dtForecastLocation; if (bllReference.getCustomer(ref dtCustomer) != 0) { return; } DataContext = bllReference; cmbCustomer.DataSource = dtCustomer.DefaultView; }