Unable to Edit Image using Entitydatasource.

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ASP.NET

LINQ

entity-framework

Hi Coders,
I am Facing a minor issue. i can insert image using listview but when i try to Update image in EditMode i am unable to Update new image.
Please Help me.
Its NewBie here.

THIS CODE IS FOR INSETING IMAGE
Protected Sub EntityDataSource1_Inserting(sender As Object, e As EntityDataSourceChangingEventArgs) Handles EntityDataSource1.Inserting
Dim PhotoID As Integer = Convert.ToInt32(Request.QueryString.Get("PhotoID"))


Dim photo As D_Photo = CType(e.Entity, D_Photo)
photo.PhotoID = PhotoID

Dim FileUpload1 As FileUpload = CType(ListView1.InsertItem.FindControl("FileUpload1"), FileUpload)
Dim VirtualFolder As String = "~/Pics/"
Dim PhysicalFolder As String = Server.MapPath(VirtualFolder)
Dim FileName As String = Guid.NewGuid.ToString

Dim Extension As String = System.IO.Path.GetExtension(FileUpload1.FileName)

FileUpload1.SaveAs(System.IO.Path.Combine(PhysicalFolder, FileName + Extension))

photo.PhotoImage = VirtualFolder + FileName + Extension

'VS()
End Sub
NOw tell me what should i do to Edit this image.