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Editorial Team
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Asked: 2026-05-29T20:39:13+00:00

Now i fixed the filtering of file extension but i have a problem on

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Now i fixed the filtering of file extension but i have a problem on “catch” it doesn’t display any error message but good, it is not sending the email with wrong file type.

but my problem is here:
catch(Exception err)
{

            Console.WriteLine(err.Message);
            lblStatus.ForeColor = Color.Red;
            lblFile.ForeColor = Color.Red;
            lblStatus.Text = "There was an error occured while submitting your application";
            lblFile.Text = " Accepts .doc, .docx and .pdf files only!";
            return ;



protected void btnSubmit_Click(object sender, EventArgs e)
{

    if (fileUpload1.HasFile) 
        {
            var fileName = Path.GetFileName(fileUpload1.PostedFile.FileName);

        try
            {
                string strExtension = Path.GetExtension(fileName);
                if (strExtension == ".docx" || strExtension == ".doc" || strExtension == ".pdf") 
                {

                    MailMessage myMessage = new MailMessage();
                    myMessage.To.Add(new MailAddress("someone@yahoo.com"));
                    myMessage.From = new MailAddress("me@gmail.com");
                    myMessage.Subject = txtSubject.Text;
                    myMessage.Body = "<html><body><br/><b>Sender Name:</b>&nbsp;" + txtName.Text.ToString() + "<br/><br/><b>Email:</b>&nbsp;" + txtEmail.Text.ToString() +
                                     "<br/><br/><b>Contact Number:</b>&nbsp;" + txtContact.Text.ToString() + "<br/><br/><b>Subject</b>&nbsp;" + txtSubject.Text.ToString() +
                                     "<br/><br/><b>CV Summary:</b><br/><br/>" + txtSummary.Text.ToString() + "</body></html>";
                    myMessage.IsBodyHtml = true;
                    myMessage.Attachments.Add(new Attachment(fileUpload1.PostedFile.InputStream, fileName));


                    SmtpClient mySmtp = new SmtpClient();
                    mySmtp.Host = "smtp.gmail.com";
                    mySmtp.Credentials = new System.Net.NetworkCredential("me@gmail.com", "mypassword");
                    mySmtp.EnableSsl = true;
                    mySmtp.Send(myMessage);

                    lblStatus.ForeColor = Color.Green;
                    lblStatus.Text = "We will contact you once you have been shortlisted to the position you are applying for. <br/> You may now close this window.";
                    txtName.Text = "";
                    txtEmail.Text = "";
                    txtSubject.Text = "";
                    txtSummary.Text = "";
                    txtContact.Text = "";
                }
            }
            catch(Exception err)
            {

                Console.WriteLine(err.Message);
                lblStatus.ForeColor = Color.Red;
                lblFile.ForeColor = Color.Red;
                lblStatus.Text = "There was an error occured while submitting your application";
                lblFile.Text = " Accepts .doc, .docx and .pdf files only!";
                return ;
            }
        }


}

protected void btnClear_Click(object sender, EventArgs e)
{
    txtName.Text = "";
    txtEmail.Text = "";
    txtSubject.Text = "";
    txtSummary.Text = "";
    txtContact.Text = "";

}
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1 Answer

  1. Editorial Team

    Here is a nicer way to do it:

      protected void btnSubmit_Click(object sender, EventArgs e)
        {
            if (fileUpload1.HasFile) ;
            {
                var fileName = Path.GetFileName(fileUpload1.PostedFile.FileName);
                try
                {
                    string strExtension = Path.GetExtension(fileName);
                    if (strExtension != ".docx" || strExtension != ".doc" || strExtension != ".pdf")
                    {
                        lblFile.ForeColor = Color.Red;
                        lblFile.Text = "You can attach .doc,.docx and pdf files only";
                        lblStatus.ForeColor = Color.Red;
                        lblStatus.Text = "There was an error occured while sending your email. Please try again later.";
                        return;
                    }

                    MailMessage myMessage = new MailMessage();
                    myMessage.From = new MailAddress(txtEmail.Text);
                    myMessage.To.Add(new MailAddress("EMAIL@yahoo.com"));
                    myMessage.Subject = txtSubject.Text;
                    myMessage.Body = "<html><body><br/><b>Sender Name:</b>&nbsp;" + txtName.Text.ToString() + "<br/><br/><b>Email:</b>&nbsp;" + txtEmail.Text.ToString() +
                                    "<br/><br/><b>Contact Number:</b>&nbsp;" + txtContact.Text.ToString() + "<br/><br/><b>Subject</b>&nbsp;" + txtSubject.Text.ToString() +
                                    "<br/><br/><b>CV Summary:</b><br/><br/>" + txtSummary.Text.ToString() + "</body></html>";
                    myMessage.IsBodyHtml = true;
                    myMessage.Attachments.Add(new Attachment(fileUpload1.PostedFile.InputStream, fileName));


                    SmtpClient mySmtp = new SmtpClient();
                    mySmtp.Host = "smtp.gmail.com";
                    mySmtp.Credentials = new System.Net.NetworkCredential("EMAIL@gmail.com", "PASSWORD");
                    mySmtp.EnableSsl = true;
                    mySmtp.Send(myMessage);

                    lblStatus.ForeColor = Color.Green;
                    lblStatus.Text = "Email successfully sent! We will contact you as soon as you have been shortlisted for the position you are applying for.<br/> Thank You. You can close this window now. ";
                    txtName.Text = "";
                    txtEmail.Text = "";
                    txtSubject.Text = "";
                    txtSummary.Text = "";
                    txtContact.Text = "";
                }
                catch(Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }

        }

    Basically, you only want to catch exceptions i.e. IO or mail sending failures.

    This code will return if the extension is not a doc, docx or pdf and not call the send mail code.

    Also, the myMessage.From() address must be a valid email address and the one that you supplied via your NetworkCredentials()

    Here is a cut down version of the code that I have tested and verified that it is working:

        protected void Button1_Click(object sender, EventArgs e)
            {
                if (FileUpload1.HasFile) ;
                {
                    var fileName = Path.GetFileName(FileUpload1.PostedFile.FileName);
                    try
                    {
                        string strExtension = Path.GetExtension(fileName);
                        if (strExtension != ".docx" || strExtension != ".doc" || strExtension != ".pdf")
                        {
                            lblFile.ForeColor = Color.Red;
                            lblFile.Text = "You can attach .doc,.docx and pdf files only";
                            lblStatus.ForeColor = Color.Red;
                            lblStatus.Text = "There was an error occured while sending your email. Please try again later.";
                            return;
                        }

                        MailMessage myMessage = new MailMessage();
                        myMessage.To.Add(new MailAddress("OtherPersonsEmail@email.xyz"));
                        myMessage.From = new MailAddress("YourEmailAddress@gmail.com");
                        myMessage.Subject = "Test";
                        myMessage.Body = "asd asd as d";
                        myMessage.IsBodyHtml = true;
                        myMessage.Attachments.Add(new Attachment(FileUpload1.PostedFile.InputStream, fileName));


                        SmtpClient mySmtp = new SmtpClient();
                        mySmtp.Host = "smtp.gmail.com";
                        mySmtp.Credentials = new System.Net.NetworkCredential("YourEmailAddress@gmail.com", "YourPassword");
                        mySmtp.EnableSsl = true;
                        mySmtp.Send(myMessage);
                    }
                    catch(Exception ex)
                    {
                        lblStatus.ForeColor = Color.Red;
                        lblStatus.Text = ex.Message;
                        Console.WriteLine(ex.Message);
                    }
                }
            }
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