有没有办法一个ASP.NET MVC回传过程中去除的ModelState错误,而无需编写每一个手工制作。
比方说,我们有一个复选框Billing Same As Shipping
,我们希望再忽略任何用户的写ShippingAddress
时,它的检查-通常你可能做的就是这一点。
ModelState.Remove("Checkout.ShipppingAddress.FirstName");
ModelState.Remove("Checkout.ShipppingAddress.LastName");
ModelState.Remove("Checkout.ShipppingAddress.Address1");
ModelState.Remove("Checkout.ShipppingAddress.Address2");
...
ModelState.Remove("Checkout.ShipppingAddress.ZipCode");
如果这是MVC 6 ,建议使用ModelBindingHelper.ClearValidationStateForModel(Type, ModelStateDictionary, IModelMetadataProvider, string)
。
这里是我的解决方案-一个RemoveFor()
的扩展方法ModelState
,MVC HTML辅助模仿:
public static void RemoveFor<TModel>(this ModelStateDictionary modelState,
Expression<Func<TModel, object>> expression)
{
string expressionText = ExpressionHelper.GetExpressionText(expression);
foreach (var ms in modelState.ToArray())
{
if (ms.Key.StartsWith(expressionText + "."))
{
modelState.Remove(ms);
}
}
}
下面是如何使用它:
if (model.CheckoutModel.ShipToBillingAddress == true)
{
// COPY BILLING ADDRESS --> SHIPPING ADDRESS
ShoppingCart.ShippingAddress = ShoppingCart.BillingAddress;
// REMOVE MODELSTATE ERRORS FOR SHIPPING ADDRESS
ModelState.RemoveFor<SinglePageStoreModel>(x => x.CheckoutModel.ShippingAddress);
}
if (ModelState.IsValid)
{
// should get here now provided billing address is valid
}
如果任何人都可以看到的方式来改善它(或没有指定泛型类型参数),那么请让我知道。 或者,如果这个存在于MvcFutures以不同的名称我宁愿切换到。
虽然我在这里只是一个辅助检查ModelState中是有效的一定的“树”
public static bool IsValidFor<TModel, TProperty>(this TModel model,
System.Linq.Expressions.Expression<Func<TModel, TProperty>> expression,
ModelStateDictionary modelState)
{
string name = ExpressionHelper.GetExpressionText(expression);
return modelState.IsValidField(name);
}
可以使用这样的:
if (model.IsValidFor(x => x.CheckoutModel.BillingAddress, ModelState))
{
_debugLogger.Log("Billing Address Valid", () => ShoppingCart.BillingAddress);
}