// Andy Gao
private void addNewButton_Click(object sender, EventArgs e)
{
AddSupplierForm addsupplierform = new AddSupplierForm();
addsupplierform.Show();
this.Hide();
}
private void addNewSupplierToolStripMenuItem_Click(object sender, EventArgs e)
{
// Create a list of open forms and bool result
List <Form> openForms = new List <Form>();
bool formIsNew = true;
// Fill up a list of forms
foreach (Form f in Application.OpenForms)
{
openForms.Add(f);
}
// Check if there is a the same form that user tries to open
foreach (Form f in openForms)
{
if (f.Name == "AddSupplierForm")
{
f.Focus();
formIsNew = false;
}
}
// If form is not opened yet open a new one
if (formIsNew == true)
{
AddSupplierForm supplierForm = new AddSupplierForm();
supplierForm.MdiParent = this;
supplierForm.Show();
}
}