[Solved] ASP.Net Download file Error: System.IO.FileNotFoundException: Could not find file

I want to retrive the file saved in the folder on my application using the file path from the database but i have not succeeded

please help

Public Class View
    Inherits System.Web.UI.Page
    Dim constr As String = ConfigurationManager.ConnectionStrings("OnlineShopConnectionString").ConnectionString

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not Me.IsPostBack Then
            Dim strConnStringT As String = ConfigurationManager.ConnectionStrings("OnlineShopConnectionString").ConnectionString
            Dim idd As String = Request.QueryString("idd").ToString()
            Using con As SqlConnection = New SqlConnection(strConnStringT)
                Using cmd As SqlCommand = New SqlCommand()
                    cmd.CommandText = "ITEM_SELECT_IID"
                    cmd.CommandType = CommandType.StoredProcedure
                    cmd.Parameters.AddWithValue("@IID", idd)
                    cmd.Connection = con
                    con.Open()
                    Dim sdr As SqlDataReader = cmd.ExecuteReader()
                    sdr.Read()
                    lblname.Text = sdr("iname").ToString()
                    lbldetil.Text = sdr("detail").ToString()
                    lblprice.Text = sdr("price").ToString()
                    lblqnt.Text = sdr("aqnt").ToString()
                    Image3.ImageUrl = sdr("image").ToString()
                    Image4.ImageUrl = sdr("image").ToString()
                    Image5.ImageUrl = sdr("image1").ToString()
                    Image6.ImageUrl = sdr("image2").ToString()
                    Image7.ImageUrl = sdr("image3").ToString()
                    con.Close()
                End Using
            End Using
        End If
    End Sub
    Protected Sub bttnpdf_Click(sender As Object, e As EventArgs) Handles Button2.Click
        Dim strConnStringT As String = ConfigurationManager.ConnectionStrings("OnlineShopConnectionString").ConnectionString
        Dim Holdfile As String
        Dim idd As String = Request.QueryString("idd").ToString()
        Using con As SqlConnection = New SqlConnection(strConnStringT)
            Using cmd As SqlCommand = New SqlCommand()
                cmd.CommandText = "ITEM_SELECT_IIDFILE"
                cmd.CommandType = CommandType.StoredProcedure
                cmd.Parameters.AddWithValue("@IID", idd)
                cmd.Connection = con
                con.Open()
                Dim sdr As SqlDataReader = cmd.ExecuteReader()
                sdr.Read()
                Holdfile = sdr("FilePath").ToString()
                con.Close()

            End Using
        End Using


        Dim FilePath As String = Holdfile
        Dim User As New WebClient()
        Dim FileBuffer As [Byte]() = User.DownloadData(FilePath)
        If FileBuffer IsNot Nothing Then
            Response.ContentType = "application/pdf"
            Response.AddHeader("content-length", FileBuffer.Length.ToString())
            Response.BinaryWrite(FileBuffer)
        End If
    End Sub
End Class

Could not find file 'E:\Books\diving-into-Asp-Net-webapi.pdf'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.IO.FileNotFoundException: Could not find file 'E:\Books\diving-into-Asp-Net-webapi.pdf'.

Source Error:


Line 68:         Dim FilePath As String = Holdfile
Line 69:         Dim User As New WebClient()
Line 70:         Dim FileBuffer As [Byte]() = User.DownloadData(FilePath)
Line 71:         If FileBuffer IsNot Nothing Then
Line 72:             Response.ContentType = "application/pdf"