I used file upload control for uploading photo but its throwing error "object reference not set to an instance of an object" only in dnn 481,dnn 482 versions. I used same control in dnn 470 version there it works fine.

Please find the code below

I used btn as  asp button control,fu as asp file upload control,img as asp image control

I am getting error in  this line  " contLength = fu.PostedFile.ContentLength" as object refererence not set to an instance of an object.
I am able to get file upload control's ID but I am not able to  capturethe content of that upload control.

Pls give me a soln.

Protected Sub btn_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btn.Click
            Dim contLength As Integer
            contLength = fu.PostedFile.ContentLength
            Dim myData(contLength) As Byte
            fu.PostedFile.InputStream.Read(myData, 0, contLength)
            Dim strpath As String = "C:\Inetpub\wwwroot\iredver1.0\CompanyLogo"
            Dim strfileName As String = Path.GetFileName(fu.PostedFile.FileName)
            Dim strpth As String = ""
            strpth = Path.Combine(strpath, strfileName)
            fu.SaveAs(strpth)
            img.ImageUrl = strpth

  End Sub