Loading File Problem

Not sure what the deal is on this, I thought I had this workign once.

System.InvalidOperationException was unhandled
Message=There is an error in XML document (0, 0).
Source=System.Xml
StackTrace:
at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
at System.Xml.Serialization.XmlSerializer.Deserialize(Stream stream)
at e_Soft_Addition_L_1.Lesson.OpenToolStripMenuItem_Click(Object sender, EventArgs e) in C:\Users\Admin\documents\visual studio 2010\Projects\e-Soft Addition L-1\e-Soft Addition L-1\Lesson.vb:line 421
at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ToolStrip.WndProc(Message& m)
at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoCompo nentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
at e_Soft_Addition_L_1.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.Xml.XmlException
LineNumber=0
LinePosition=0
Message=Root element is missing.
Source=System.Xml
SourceUri=""
StackTrace:
at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
at System.Xml.XmlTextReaderImpl.Read()
at System.Xml.XmlTextReader.Read()
at System.Xml.XmlReader.MoveToContent()
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderStorage.Read3_Storage()
InnerException:


Code:

Code:

---

Private FileDialog As SaveFileDialog

    Public Sub New()
        InitializeComponent()
        FileDialog = New SaveFileDialog()
        FileDialog.Filter = "e Soft Lesson | *.les"
        FileDialog.DefaultExt = "les"
    End Sub

    Private Sub OpenToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenToolStripMenuItem.Click
        'Load Action
        Dim AppSerializer As Xml.Serialization.XmlSerializer = New Xml.Serialization.XmlSerializer(GetType(Storage))
        Dim AppFileStream As FileStream = New FileStream(".les", FileMode.Open)
        OpenFileDialog1.Filter = "e Soft Lesson | *.les"
        OpenFileDialog1.DefaultExt = "les"
        OpenFileDialog1.Title = "Windows Explorer"
        OpenFileDialog1.ShowDialog()
        Storage = CType(AppSerializer.Deserialize(AppFileStream), Storage)
        UpdateForm()
        AppFileStream.Close()
    End Sub

    Private Sub SaveToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveToolStripMenuItem.Click
        'Save Action
        Dim dr As DialogResult = FileDialog.ShowDialog()
        Dim fileName As String = FileDialog.FileName
        Dim AppSerializer As Xml.Serialization.XmlSerializer = New Xml.Serialization.XmlSerializer(GetType(Storage))
        Dim fileStream As New System.IO.FileStream(fileName, IO.FileMode.Create)
        Dim SW As New System.IO.StreamWriter(fileStream)

        If Storage.Name = "" Then
            MsgBox("Please Enter Your Name And try Again")
        Else
            AppSerializer.Serialize(SW, Storage)
            SW.Close()
        End If
    End Sub

---

The code worked fine in another program so not sure why its not working well here.

Looks like you're trying to deserialize an object from invalid XML.

Quote:

---

Message=Root element is missing.
Source=System.Xml
SourceUri=""

---

I saw the above in the stack trace you posted. Seems the XML document doesnt have a root element.

ok so where is the error code wise? Sorry im still newb so a code exsample would help too please ty.

No...what I'm saying is that there is something wrong with the XML data itself, not the code.

oo ok so how do i fix that?

The error itself is a clue. You may need a Root node in your XML Data like:-

Code:

---

<Root>
    <WhateverData>
    </WhateverData>
</Root>

---

Im a newb if u want i can let u team view me. I understand that somethign wrong in the xml file but its a blank text document so nothing o be wrong.