How do I save FileUpload on PostBack?

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Can't figure this out.
Here is my code:

HTML

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="WebForm2.aspx.vb" Inherits="PDFRequesting.WebForm2" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <ajaxToolkit:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"></ajaxToolkit:ToolkitScriptManager>
    <div>

        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>


        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>


        <ajaxToolkit:AsyncFileUpload ID="AsyncFileUpload1" runat="server" />
    <asp:Button ID="Button1" runat="server" Text="Button" />
    </div>
    </form>
</body>
</html>

And here is my code behind:

VB

Imports AjaxControlToolkit

Public Class WebForm2
    Inherits System.Web.UI.Page
    Dim VerifyError As Boolean

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        'If first time page is submitted and we have file in FileUpload control but not in session 
        ' Store the values to SEssion Object 
        If ((Session("FileUpload23") Is Nothing) AndAlso AsyncFileUpload1.HasFile) Then
            Session("FileUpload23") = AsyncFileUpload1
            Label1.Text = AsyncFileUpload1.FileName

            ' Next time submit and Session has values but FileUpload is Blank 
            ' Return the values from session to FileUpload 
        ElseIf ((Not (Session("FileUpload23")) Is Nothing) AndAlso Not AsyncFileUpload1.HasFile) Then
            AsyncFileUpload1 = CType(Session("FileUpload23"), AsyncFileUpload)
            Label1.Text = AsyncFileUpload1.FileName

            ' Now there could be another sictution when Session has File but user want to change the file 
            ' In this case we have to change the file in session object 
        ElseIf AsyncFileUpload1.HasFile Then
            Session("FileUpload23") = AsyncFileUpload1
            Label1.Text = AsyncFileUpload1.FileName
        End If

    End Sub

    Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        If Verify() Then
        Else
            Label1.Text = "Error"

            AsyncFileUpload1 = Session("FileUpload23")
        End If

    End Sub

    Protected Function Verify() As Boolean
        Verify = True
        If TextBox1.Text = Nothing Then
            Verify = False
        End If
        Return Verify

    End Function
End Class

I have seen this example on the net but I can't get it to work. Every time I click on the button and an error is found(No Text in the Textbox) the page refreshes and I lose my file in the AsyncFileUpload. I have tried with the old FileUpload and the I get the same results.
What am I missing?

Thank you

Posted 21-Jan-15 16:04pm

mutlyp

Updated 21-Jan-15 16:15pm

DamithSL

v2

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DamithSL · Answer 1 · 2015-01-21T16:22:00

Solution 1

you need to save file on OnUploadedComplete event,
refer below tutorial Using ASP.Net AJAX Control Toolkits AsyncFileUpload Control[^]
and CP article : AsyncFileUpload Control - New Control in Ajax Control ToolKit[^]

Posted 21-Jan-15 16:22pm

DamithSL