我收到了上级的指示,使用远程验证而不是RequiredIf 属性来检查某个字段是否具有值,如果它能够被用户编辑。
现在,我的代码看起来像这样 -
查看模型
public class FooModel
{
// SNIP: Unimportant extra variables
public int? DeviceId;
public int? ProviderId;
[Remote("IsMessageRequired", "Foo",
AdditionalFields="DeviceId,CarrierId",
ErrorMessage="(required for other")]
public string MessageAddress { get;set; }
// SNIP: Unimportant other details
}
控制器
public class FooController
{
// SNIP: Unimportant details
public JsonResult IsMessageRequired(string messageAddress, int? device, int? carrier)
{
if(!string.IsNullOrEmpty(messageAddress))
return Json(true, JsonRequestBehavior.AllowGet);
// Conditions:
// A) Device = "Samsung" / Carrier = "Other"
// B) Device = "Other"
if(device = FooModel.GetDeviceIdByName("Samsung")
&& carrier = FooModel.GetProviderIdByName("Other")
{
return Json(! string.IsNullOrEmpty(pageAddress), JsonRequestBehavior.AllowGet);
}
if(device = FooModel.GetDeviceIdByName("Other"))
{
return Json(! string.IsNullOrEmpty(pageAddress), JsonRequestBehavior.AllowGet);
}
// Default condition occurs on first-run scenarios.
return Json(true, JsonRequestBehavior.AllowGet);
}
// SNIP: Other unimportant details
}
...最后,我的观点:
@model FooProject.Models.FooModel
@Html.DropDownFor(x => x.DeviceId)
@Html.DropDownFor(x => x.ProviderId)
@Html.TextBoxFor(x => x.MessageAddress)
@Html.ValidationMessageFor(x => x.MessageAddress)
问题:验证仅在输入值时触发,但在文本框不包含任何值时不会触发。远程验证是否仅在文本框中有值时才有效?如果不是,我如何错误地处理此设置?