private void button1_Click(object sender, EventArgs e) { BL.Worker worker = new BL.Worker(); if (!(txtname.Text.Equals("") || txtOriginalPrice.Text.Equals("") || txtsellPrice.Text.Equals("") || txtCriticalQuantity.Text.Equals("") || txtAvilableQuantiity.Text.Equals(""))) { BL.Product product=new BL.Product(txtname.Text,Convert.ToInt32(txtAvilableQuantiity.Text),Convert.ToInt32(txtCriticalQuantity.Text),float.Parse(txtOriginalPrice.Text),float.Parse(txtsellPrice.Text)); if(worker.AddProduct(product)){ // check product is added if added show user message box Done MessageBox.Show("تم اضافة المنج بنجاح"); txtAvilableQuantiity.Text = ""; txtCriticalQuantity.Text = ""; txtname.Text = ""; txtOriginalPrice.Text = ""; txtsellPrice.Text = ""; } else{ // if prduct do not adde show user message Wrong for adding product MessageBox.Show("خطا فى الاضافه"); } } else { MessageBox.Show("املا جميع الفرغات"); } //show message box to make user write all fields }