MVC中实现部分校验的方法

原创于 2013-05-04 17:51:03 发布 · 901 阅读

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本文介绍了一个名为ValidateOnlyIncomingValuesAttribute的自定义属性，该属性用于清除不在传入请求中存在的模型状态错误。通过覆盖OnActionExecuting方法实现，在RegistrationController中应用此过滤器。

public class ValidateOnlyIncomingValuesAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        var modelState = filterContext.Controller.ViewData.ModelState;
        var incomingValues = filterContext.Controller.ValueProvider;

        var keys = modelState.Keys.Where(x => !incomingValues.ContainsPrefix(x));
        foreach (var key in keys) // These keys don't match any incoming value
            modelState[key].Errors.Clear();
    }
}
Now apply this filter to RegistrationController.
[ValidateOnlyIncomingValues]
public class RegistrationController : Controller
{
    ...
}