I Am Facing Error In Asp.Net I.E System Null Reference Exceptin,But I Am Unable To Find From Where This Error Come,Actualy When I Run Program From Serve It Gives This Error ,But It Work Properly...

Question

0.00/5 (No votes)

See more:

Eror-Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

our program:-

C#

using System;
using System.Configuration;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Net.Security;
using System.Net.Mail;
using System.Net;

namespace WebDesign
{
    public partial class contact_us : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }


        protected void SendMail()
        {

            // any address where the email will be sending
            var toAddress = YourEmail.Text.ToString();
            // Gmail Address from where you send the mail
            var fromAddress = "....";
            //Password of your gmail address
            const string fromPassword = "....";
            // Passing the values and make a email formate to display
            string subject = YourSubject.Text.ToString();
            string body = "From: " + YourName.Text + "\n";
            body += "Email: " + YourEmail.Text + "\n";
            body += "Subject: " + YourSubject.Text + "\n";
            body += "Question: \n" + Comments.Text + "\n";
            // smtp settings
            var smtp = new System.Net.Mail.SmtpClient();
            {
                smtp.Host = "smtp.gmail.com";
                smtp.Port = 587;
                smtp.EnableSsl = true;
                smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
                smtp.Credentials = new NetworkCredential(fromAddress, fromPassword);
                smtp.Timeout = 20000;
            }
            // Passing values to smtp object
            smtp.Send(toAddress, fromAddress, subject, body);
        }


        protected void btnSubmit_Click(object sender, EventArgs e)
        {
            try
            {
                //here on button click what will done
                SendMail();
                DisplayMessage.Text = "mail send";
                DisplayMessage.Visible = true;
                YourSubject.Text = "";
                YourEmail.Text = "";
                YourName.Text = "";
                Comments.Text = "";
            }
            catch (Exception) { }
        }
    }
}

Posted 8-Apr-14 23:13pm

ADI@345

Add a Solution

Comments

OriginalGriff 9-Apr-14 5:23am

And?
Where did the stack trace say the error was?

Ajith K Gatty 9-Apr-14 5:33am

Hi OriginalGriff

in SendMail() function what is that var smtp = new System.Net.Mail.SmtpClient();{//codes// }. is that correct?

OriginalGriff 9-Apr-14 5:52am

I should know? I can't run it...and if I did know, would I have posted asking the OP? :laugh:

ADI@345 9-Apr-14 5:57am

the code u have given isn't working...

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Ajith K Gatty · Answer 1 · 2014-04-08T23:39:00

Hi Adi,

Check this code. especially smtpClient smtp ...... part

try
     {
       SmtpClient smtp = new SmtpClient
       {
         Host = "smtp.gmail.com", // smtp server address here...
         Port = 587,
         EnableSsl = true,
         DeliveryMethod = SmtpDeliveryMethod.Network,
         Credentials = new System.Net.NetworkCredential(senderID, senderPassword),
         Timeout = 30000,
       };
       MailMessage message = new MailMessage(senderID, toAddress, subject, body);
       smtp.Send(message);
     }
     catch (Exception ex)
     {
       result = "Error sending email.!!!";
     }
     return result;