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我读了这个有用的例子http://msdn.microsoft.com/en-us/library/gg508808%28v=vs.98%29.aspx?cs-save-lang=1&cs-lang=vb#code-snippet-2用于 MVC3 中的远程验证,当我创建新项目时效果很好;但是,当我尝试编辑新创建的项目时,我遇到了麻烦。

我有一个这样的模型

Imports System.ComponentModel
Imports System.ComponentModel.DataAnnotations
Imports System.Web.Mvc
Imports System.Collections.Generic

Public Class Language

    Public Property LanguageId As Integer

    <Display(Name:="DisplayNameLanguageName", ResourceType:=GetType(Resources.Language)),
        Required(ErrorMessageResourceName:="ErrorMessageLanguageNameRequired", ErrorMessageResourceType:=GetType(Resources.Language)),
        StringLength(20),
        Remote("IsNameAvailable", "Language", "AdminArea", ErrorMessageResourceName:="ErrorMessageNameNotAvailable", ErrorMessageResourceType:=GetType(Resources.Language))>
    Public Property Name As String

    Public Property Flag as String    
End Class

在控制器“语言”类中,我有......

   'OutputCache needed for remote validation
   <OutputCache(Location:=OutputCacheLocation.None, NoStore:=True)>
    Public Class LanguageController
        Inherits System.Web.Mvc.Controller

        Private db As StoreEntities = New StoreEntities

        'remote validation for duplicates
        Public Function IsNameAvailable(Name As String) As JsonResult
            Return Json(Not db.Languages.Any(Function(x) x.Name = Name), JsonRequestBehavior.AllowGet)
        End Function

[...]

从“Create.vbhtml”视图中,我可以创建一种新语言,但从“Edit.vbhtml”中,我不能只编辑 Flag 属性,为 Name 保留相同的值,因为验证开始了。我也被迫更改 Name 属性。

我该如何解决这个问题?

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1 回答 1

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我解决了在Edit.vbhtml视图中添加隐藏字段“HiddenName”的问题

Public Function IsNameAvailable(Name As String, Optional HiddenName As String = "") As JsonResult
    If Name <> HiddenName Then
        Return Json(Not db.Languages.Any(Function(x) x.Name = Name), JsonRequestBehavior.AllowGet)
    Else
        Return Json(True, JsonRequestBehavior.AllowGet)
    End If
End Function
于 2012-12-22T15:11:14.073 回答