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我得到這個錯誤時,當我嘗試到的XElement添加到的XDocument:InvalidOperationException異常努力的XElement添加到的XDocument
「System.InvalidOperationException」類型的異常出現在 的System.Xml。 Linq.ni.dll但在用戶代碼中處理
我的代碼是:
Imports System.Xml
Imports System.Xml.Linq
Imports System.IO.IsolatedStorage
Imports System.IO
Public Sub SaveRecord()
Using myIsolatedStorage As IsolatedStorageFile = IsolatedStorageFile.GetUserStoreForApplication()
Dim doc As XDocument
Using isoStore1 As IsolatedStorageFile = _
IsolatedStorageFile.GetUserStoreForApplication()
Using isoStream1 As IsolatedStorageFileStream = New IsolatedStorageFileStream("file.xml", FileMode.Open, isoStore1)
doc = XDocument.Load(isoStream1)
MessageBox.Show(doc.ToString)
'This gives the right xml-code
doc.Add(New XElement("NewChild", "new content")) 'This is where the error takes place
MessageBox.Show(doc.ToString)
Using isoStore As IsolatedStorageFile = IsolatedStorageFile.GetUserStoreForApplication()
Using isoStream As IsolatedStorageFileStream = New IsolatedStorageFileStream("file.xml", FileMode.Create, isoStore)
doc.Save(isoStream)
End Using
End Using
End Using
End Using
End Using
Exit Sub
End Sub
錯誤顯示調試器時進入線路doc.Add(New XElement("NewChild", "new content"))
任何人都可以向我解釋這個錯誤的原因是什麼以及我如何解決它?