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我一直在努力获取字段值更改提交。有什么明显错误的位置:实体linq savechanges问题
<HttpPost()>
Function Details(id As Guid?, model As RosterDetailModel) As ActionResult
If model.Action = RosterDetailModel.ActionOption.Save Then
If model.Action = RosterDetailModel.ActionOption.Save Then
Dim invalid = False ' initalize able to save
'check validations
Dim sFirstname = IIf(model.NameFirst Is Nothing, String.Empty, model.NameFirst).ToString().Trim()
If sFirstname = String.Empty Then
invalid = True
ModelState.AddModelError("NameFirst", "First Name is required.")
End If
If invalid = False Then
'save is ok to do
Using db As New BCData()
Dim userModel As New RosterDetailModel(db, id)
'Dim userModel As New RosterDetailModel
'userModel =
userModel.NameFirst = sFirstname
'db.ApplyCurrentValues(userModel)
'db.AcceptAllChanges()
db.SaveChanges()
'userModel.SaveChanges(db, id, userModel)
End Using
End If
End If
End If
Return View(model)
End Function
我看到Entity Model Not Being Updated on SaveChanges有“但问题是,我引用了容器的不同实例(每个经理创建了自己的)。因此,实体项目未连接到任何东西。” ..我不知道我到底需要改变什么。当我试图做一个Linq查询并直接设置值时,它会告诉我该字段是只读的。
If invalid = False Then
'save is ok to do
Using db As New BCData()
'Dim userModel As New RosterDetailModel(db, id)
Dim userModel = From studentusers In db.studentusers _
Where _
studentusers.studentGuid = id _
Select _
studentusers.cellPhone, _
studentusers.officePhone, _
studentusers.phone, _
studentusers.alternateEmail, _
studentusers.country, _
studentusers.zip, _
studentusers.state, _
studentusers.city, _
studentusers.address2, _
studentusers.address1, _
studentusers.ForumeMailNotificationPreferences, _
studentusers.magazineSubscribed, _
studentusers.avatar, _
studentusers.dateStudentActivated, _
studentusers.dateDownloadOn, _
studentusers.dateInstructorOn, _
studentusers.instructor, _
studentusers.ctcAdmin, _
studentusers.download, _
studentusers.accessLevel, _
studentusers.datecreated, _
studentusers.guidsignaturecookie, _
studentusers.password, _
studentusers.organization, _
studentusers.email, _
studentusers.lastname, _
studentusers.firstname, _
studentusers.groupGuid, _
studentusers.studentGuid
db.Attach(userModel)
'Dim userModel As New RosterDetailModel
'userModel =
userModel.FirstOrDefault.firstname = sFirstname '**<- **** READ ONLY ???**
'db.ApplyCurrentValues(userModel)
'db.AcceptAllChanges()
db.SaveChanges()
'userModel.SaveChanges(db, id, userModel)
End Using
感谢它在你的解决方案中工作 - 我错过了我投影到匿名类型的细节。看起来代码是相似的。 – phoenixAZ 2012-02-12 18:02:15
@phoenixAZ:投影到匿名类型是你的'选择studentusers.cellPhone,...'。你正在创建一个匿名对象。它与你的'StudentUser'实体具有相同的属性,但它仍然是另一种类型。 – Slauma 2012-02-12 19:56:49