C# 如何在 MVC 中为具有多个属性的视图模型添加验证错误？
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How to add a validation error in MVC for a view model with multiple properties?
提问by John Zumbrum
If I have a view model that looks something like this:
如果我有一个看起来像这样的视图模型：
public class Car
{
Wheel CarWheel {get;set;}
Body CarBody {get;set;}
}
And my Wheel and Body classes look something like this:
我的 Wheel 和 Body 类看起来像这样：
public class Wheel
{
int Number {get;set;}
string WheelType {get;set;}
}
public class Body
{
int Number {get;set;}
string BodyType {get;set;}
}
And I want to add a model error for the wheel number being less than 1:
我想为车轮编号小于 1 添加模型错误：
ModelState.AddModelError(???, "Error! You must have at least one wheel to avoid abrasion on your bottom");
How do I specify that the error is specifically with the Wheel class, and not the Body class?
我如何指定错误是专门针对 Wheel 类而不是 Body 类的？
采纳答案by Bryan
To specify that the error is on the CarWheelversion of Numberand not CarBody, you'll need to "namespace" the value for the property name in the same way you would to get or set that property's value:
要指定错误发生在和 not的CarWheel版本上，您需要以与获取或设置该属性的值相同的方式“命名空间”属性名称的值：NumberCarBody
ModelState.AddModelError("CarWheel.Number", "Error! You must have at least one wheel to avoid abrasion on your bottom");
回答by Sender
ModelState.AddModelError("Car_CarWheel_Number", "Error! You must have at least one wheel to avoid abrasion on your bottom");
OR
或者
ModelState.AddModelError("", "Error! You must have at least one wheel to avoid abrasion on your bottom \n\r Error 2");
回答by chris
Bryan's answer or you could try using data annotations.
Bryan 的回答，或者您可以尝试使用数据注释。
The range attribute should work for you or you could write your own if need be.
range 属性应该适合您，或者您可以根据需要自行编写。
