在大多数示例中,我看到ModelState.AddModelError()和if(ModelState.IsValid)放在Controller中.但是,我想将验证逻辑移动/集中到模型类.我可以让模型类检查模型错误并填充ModelState.AddModelError()吗？

现行代码：

// Controller
[HttpPost]
public ActionResult Foo(Bar bar)
{  
    // This model check is run here inside the controller.
    if (bar.isOutsideServiceArea())
        ModelState.AddModelError("Address","Unfortunately,we cannot serve your address.");

    // This is another model check run here inside the controller.
    if (bar.isDuplicate())
        ModelState.AddModelError("OrderNumber","This appears to be a duplicate order");

    if (ModelState.IsValid)
    {
        bar.Save();
        return RedirectToAction("Index");
    }
    else
        return View(bar)
}

期望代码：

// Controller
[HttpPost]
public ActionResult Foo(Bar bar)
{  
    // something here to invoke all tests on bar within the model class

    if (ModelState.IsValid)
    {
        bar.Save();
        return RedirectToAction("Index");
    }
    else
        return View(bar)
}


...
// Inside the relevant Model class
if (bar.isOutsideServiceArea())
    ModelState.AddModelError("Address",we cannot serve your address.");

if (bar.isDuplicate())
    ModelState.AddModelError("OrderNumber","This appears to be a duplicate order");