Upload multiple files using Fileupload control in asp.net

Introduction: In this article I will explain how to upload multiple files using Fileupload control in asp.net 4.5

Description:

In the previous article I have explained Show large imageon mousehover using JavaScript in asp.net, Create Temporary tabledynamically in asp.net, Encrypt and Decrypt the connection String in Web.Configfile in asp.net and CreateTemporary table dynamically and bind to Gridview in asp.net .

In earlier version of Asp.net (4.0), there is no option to upload multiple files using fileupload control but now Fileupload control support the multiple files selection features and upload all the selected files at once.

Html Markup Of page:

<table>

            <tr><td>Upload Image:</td><td> <asp:fileupload ID="Fileupload1" runat="server" AllowMultiple="true"></asp:fileupload></td></tr>

            <tr><td></td><td><asp:Button ID="Button1" runat="server" Text="Upload File" OnClick="Button1_Click" /></td></tr>

        </table>

C# Code:

using System.IO;

protected void Button1_Click(object sender, EventArgs e)

    {

        try

        {

            if (Fileupload1.HasFiles)

            {

                foreach (HttpPostedFile postedfile in Fileupload1.PostedFiles)

                {

                    string fileName = Path.GetFileName(postedfile.FileName);

                    postedfile.SaveAs(Server.MapPath("~/ImageUploads/") +Guid.NewGuid()+ fileName);

                }

                Messagebox(string.Format("{0} Files have been uploaded Successfully", Fileupload1.PostedFiles.Count));

            }

        }

        catch (Exception ex)

        {

        }

    }

    private void Messagebox(string Message)

    {

        Label lblMessageBox = new Label();

        lblMessageBox.Text =

            "<script language='javascript'>" + Environment.NewLine +

            "window.alert('" + Message + "')</script>";

        Page.Controls.Add(lblMessageBox);

    }

VB Code:

Imports System.IO

Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Try

            If Fileupload1.HasFiles Then

                For Each postedfile As HttpPostedFile In Fileupload1.PostedFiles

                    Dim fileName As String = Path.GetFileName(postedfile.FileName)

                    postedfile.SaveAs(Server.MapPath("~/ImageUploads/") & fileName)

                Next

                Messagebox(String.Format("{0} Files have been uploaded Successfully", Fileupload1.PostedFiles.Count))

            End If

        Catch ex As Exception

        End Try

    End Sub

    Private Sub Messagebox(ByVal Message As String)

        Dim lblMessageBox As New Label()

        lblMessageBox.Text = "<script language='javascript'>" + Environment.NewLine & "window.alert('" & Message & "')</script>"

        Page.Controls.Add(lblMessageBox)

    End Sub

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