Loading File Problem

[mholmes_3038]

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:

 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.

[Niya]

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

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.

[mholmes_3038]

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

[Niya]

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

[mholmes_3038]

oo ok so how do i fix that?

[Niya]

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

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

[mholmes_3038]

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.