How to automatically select a file to FileUpload on page load? - asp.net

Question

I want to automatically select a file on page load to my FileUpload1. I tried searching but I cant find any related instances. I want to do somethhing like this.
Private Sub WebForm1_Load(sender As Object, e As EventArgs) Handles Me.Load
FileUpload1.setfile("D:\file\Test.Wav")
End Sub
Because my program is to record a sound (wav file) and it saves to a specific folder. And afterwards, I can select the recorded file and upload/save the file to the database.
When you click button_1, it records a sound using the mic. Then you will button_2 to stop and save the recorded sound.
But what i wanted to do is after clicking the button_2, it will stop and save the recording AND asynchronously it uploads the file to the database.
Here is the code: .VB file
Imports System.Data.SqlClient
Imports System.IO
Imports Microsoft.VisualBasic.Devices
Imports Microsoft.VisualBasic
Imports System.Runtime.InteropServices
Imports System.Text
Partial Class Default2
Inherits System.Web.UI.Page
Protected Sub btnUpload_Click(sender As Object, e As EventArgs) Handles btnUpload.Click
Using br As New BinaryReader(FileUpload1.PostedFile.InputStream)
Dim bytes As Byte() = br.ReadBytes(CInt(FileUpload1.PostedFile.InputStream.Length))
Dim strConnString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
Using con As New SqlConnection(strConnString)
Using cmd As New SqlCommand()
cmd.CommandText = "insert into tblFiles(Name, ContentType, Data) values (#Name, #ContentType, #Data)"
cmd.Parameters.AddWithValue("#Name", Path.GetFileName(FileUpload1.PostedFile.FileName))
cmd.Parameters.AddWithValue("#ContentType", "audio/mpeg3")
cmd.Parameters.AddWithValue("#Data", bytes)
cmd.Connection = con
con.Open()
cmd.ExecuteNonQuery()
con.Close()
End Using
End Using
End Using
Response.Redirect(Request.Url.AbsoluteUri)
End Sub
Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
If Not IsPostBack Then
BindGrid()
End If
End Sub
Private Sub BindGrid()
Dim strConnString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
Using con As New SqlConnection(strConnString)
Using cmd As New SqlCommand()
cmd.CommandText = "select Id, Name from tblFiles"
cmd.Connection = con
con.Open()
GridView1.DataSource = cmd.ExecuteReader()
GridView1.DataBind()
con.Close()
End Using
End Using
End Sub
<DllImport("winmm.dll")> _
Private Shared Function mciSendString(ByVal command As String, ByVal buffer As StringBuilder, ByVal bufferSize As Integer, ByVal hwndCallback As IntPtr) As Integer
End Function
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Try
Dim i As Integer
i = mciSendString("open new type waveaudio alias capture", Nothing, 0, 0)
i = mciSendString("record capture", Nothing, 0, 0)
Label1.Text = "Recording"
Label1.BackColor = Drawing.Color.Green
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Try
Dim i As Integer
i = mciSendString("save capture " & "D:\file\Test.Wav", Nothing, 0, 0)
i = mciSendString("close capture", Nothing, 0, 0)
Label1.Text = "Idle"
Label1.BackColor = Drawing.Color.Yellow
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub
Private Sub WebForm1_Load(sender As Object, e As EventArgs) Handles Me.Load
End Sub
End Class
aspx.file
<form runat="server">
<asp:Button ID="Button1" runat="server" Text="Record" />
<asp:Button ID="Button2" runat="server" Text="Save" />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="btnUpload" runat="server" Text="Upload"
onclick="btnUpload_Click" />
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" RowStyle- BackColor="#A1DCF2" Font-Names = "Arial" Font-Size = "10pt"
HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White">
<Columns>
<asp:BoundField DataField="Name" HeaderText="FileName" />
<asp:TemplateField>
<ItemTemplate>
<object type="application/x-shockwave-flash" data='dewplayer-vol.swf?mp3=File.ashx?Id=<%# Eval("Id") %>'
width="240" height="20" id="dewplayer">
<param name="wmode" value="transparent" />
<param name="movie" value='dewplayer-vol.swf?mp3=File.ashx?Id=<%# Eval("Id") %>'/>
<object>
</ItemTemplate>
</asp:TemplateField>
<asp:HyperLinkField DataNavigateUrlFields="Id" Text = "Download" DataNavigateUrlFormatString = "~/File.ashx?Id={0}" HeaderText="Download" />
</Columns>
</asp:GridView>

Answer 1

I don't think it is possible due to security reasons. Imagine you visit a random site and it automatically starts uploading files from your local file system without your knowledge/permission.
The input type file control requires the user to select a file to upload, so there is no way you can do it programmatically.