Getting the Error Description from ModelState

[ADSCNET]

Hi, I'm using a FormView and update method which try to update the database, but it's throwing and error, I need to know on which field the error was but I am not able to extract the error msg from the ModelStateDictionary so I can know what is the exact error msg, the code as follow:

Public Function UpdateTest(id As Integer) As Integer
Dim Employee = _db.DbSet_Employees.Find(id)

    Try

        If Employee Is Nothing Then
            ModelState.AddModelError("ModelError", String.Format("Employee with ID {0} could not be found", id))
            Return 0
        End If

        TryUpdateModel(Employee)
        If Not ModelState.IsValid Then
            ModelState.AddModelError("ModelError", String.Format("Employee with ID {0} could not be updated", id))

            MsgBox(ModelState.GetErrorMessageForKey("error"))

            Return 0
        End If

    Catch ex As Exception
        ' Me.lblMsg.Text = Err.Description.ToString
        Me.lblMsg2.Text = ex.Message.ToString
        Return 0
    End Try

    ' write the changes to the database
    Return \_db.SaveChanges
End Function

Public Module ExtMethod
<System.Runtime.CompilerServices.Extension> _
Public Function GetErrorMessageForKey(ByVal dictionary As ModelStateDictionary, ByVal key As String) As String
Return dictionary(key).Errors.First().ErrorMessage
End Function
End Module

The problem start from TryUpdateModel then in the temperrory line MsgBox() Thanks for the help.

[ADSCNET]

I've done the following, created a model & then a function to be able to use it around my app:

Public Function GetErrorList(ByVal modelState As ModelStateDictionary) As String
Dim errorList = ( _
From item In modelState _
Where item.Value.Errors.Any() _
Select item.Value.Errors(0).ErrorMessage).ToList()

    Return "Error in Rec. {0}: " & errorList.Item(0).ToString

End Function

Then I call the function:

TryUpdateModel(Customer)
If Not ModelState.IsValid Then
ModelState.AddModelError("ModelError", String.Format(GetErrorList(ModelState), id))
Return 0
End If