แก้ไขข้อมูลใน Gridview กรณีที่มีช่องสำหรับใส่ภาพลงไปเพื่อแก้ไข ควรทำยังไงดี

Protected Sub gridStore_RowUpdating(sender As Object, e As GridViewUpdateEventArgs)
        Dim storeID As TextBox = CType(gridStore.Rows(e.RowIndex).FindControl("txtstoreID"), TextBox)
        Dim storeName As TextBox = CType(gridStore.Rows(e.RowIndex).FindControl("txtstoreName"), TextBox)
        Dim active As RadioButtonList = CType(gridStore.Rows(e.RowIndex).FindControl("rdbactive"), RadioButtonList)
        Dim online As RadioButtonList = CType(gridStore.Rows(e.RowIndex).FindControl("rdbonline"), RadioButtonList)
        Dim fiUpload As FileUpload = CType(gridStore.Rows(e.RowIndex).FindControl("fiUpload"), FileUpload)

        Dim UlFileName As String = "Image_Store/" & fiUpload.FileName
        If fiUpload.HasFile Then
            UlFileName += fiUpload.FileName
            fiUpload.SaveAs(Server.MapPath(UlFileName))
       
        End If

        Dim SqlCon As New SqlConnection(con)
        Dim cmd As New SqlCommand("UPDATE Store SET storeName='" & storeName.Text & "', active='" & active.SelectedValue & "', online='" & online.SelectedValue & "', storePic='" & UlFileName & "' WHERE storeID='" & storeID.Text & "'", SqlCon)
        SqlCon.Open()
        cmd.ExecuteNonQuery()
        SqlCon.Close()


        gridStore.EditIndex = -1
        loadStore()


    End Sub