public Stock_In()
{
InitializeComponent();
categoryComboBox.DataSource = stockInManager.GetCategoryTable(category);
companyComboBox.DataSource = stockInManager.GetCompanyTable(company);
itemComboBox.DataSource = stockInManager.GetItemTable(item);
categoryComboBox.SelectedItem = null;
companyComboBox.SelectedItem = null;
itemComboBox.SelectedItem = null;
categoryComboBox.Text = "------Select--------";
companyComboBox.Text = "------Select--------";
itemComboBox.Text = "------Select--------";
reorderLevelLabel.Text = String.Empty;
availableQuantityLabel.Text = String.Empty;
}