Email Attachments

Demo uploads land in a temporary store and are swept after 60 minutes. To keep files, handle FileUploaded — see Single File for the complete save pattern.

Email Attachments

Email compose form with attachment uploader. Files appear as compact chips below the compose area. Uses Web Forms controls for the email fields.

What you should see: an "Attach Files" flow for a compose screen - multiple files, immediate upload, each listed as an attachment chip.

Subject

Message

Drag & drop files here, or paste from clipboard

<au:AjaxFileUpload ID="Uploader1" runat="server"
 AllowMultiple="true" AutoUpload="true" ButtonText="Attach Files" />
<asp:Button ID="BtnSend" runat="server" Text="Send" OnClick="BtnSend_Click" />

protected void BtnSend_Click(object sender, EventArgs e)
{
    using (var msg = new System.Net.Mail.MailMessage())
    {
        foreach (var item in Uploader1.Items)
        {
            msg.Attachments.Add(new System.Net.Mail.Attachment(
                item.OpenStream(),
                Path.GetFileName(item.FileName),
                item.ContentType));
        }
        // configure <mailSettings>, set From/To, then:
        // new System.Net.Mail.SmtpClient().Send(msg);
    }
}

Upgrading from v4? Your existing code keeps working with the CuteWebUI markup - no rewrite needed:

<%@ Register Namespace="CuteWebUI" Assembly="CuteWebUI.AjaxUploader" TagPrefix="CuteWebUI" %>
<CuteWebUI:UploadAttachments ID="Uploader1" runat="server" />

foreach (AttachmentItem item in Uploader1.Items)
{
    string fileName = Path.GetFileName(item.FileName);
    mailer.Message.Attachments.Add(item.OpenStream(), fileName, ...);
}