Entity Framework - Blank data is still added to Database - database

Question

I have made a validation to prevent data into being inserted to the DB when it's empty but it still enters a blank form to the database?
protected void Button1_Click(object sender, EventArgs e)
{
ProjectTestEntities User_save = new ProjectTestEntities();
User ins = new User();
ins.name = TextBox1.Text;
ins.email = TextBox2.Text;
ins.phone = TextBox3.Text;
ins.gender = RadioButtonList1.SelectedValue;
ins.password = TextBox4.Text;
if (ins.name == null || ins.email == null || ins.gender == null || ins.password == null)
{
Label1.Text = "Incomplete input";
}
else
{
User_save.Users.AddObject(ins);
User_save.SaveChanges();
}
}

Answer 1

Try using string.IsNullOrEmpty()
if (string.IsNullOrEmpty(ins.name == null) ||
string.IsNullOrEmpty(ins.email == null) ||
string.IsNullOrEmpty(ins.gender == null) ||
string.IsNullOrEmpty(ins.password == null))
{
Label1.Text = "Incomplete input";
}
else
{
User_save.Users.AddObject(ins);
User_save.SaveChanges();
}