检查对象属性是否有空值

public ActionResult Create(crm_CompetitiveProducts cp)
{
using (var db = new BaseDbContext())
{
PropertyInfo[] propertys = cp.GetType().GetProperties();
int a = 0;
foreach (var i in propertys)
{
if (i.GetValue(cp) == null)
{
a = a + 1;
}
}
if (a == 0)
{
db.Insert<crm_CompetitiveProducts>(cp);
}
else
{
this.ShowMessage("信息不全", "录入失败");
return RedirectToAction("Create");
}
return RedirectToAction("Index");
}
}