Send email with multiple/defined “To” recipients

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I have a kind of form in asp.net. I want to send the form to email depending upon which city is selected from menu choice.
Here's the code in cs file:

C#

htbl["@HtmlPage"] = sbTableData.ToString();
    string _From = ConfigurationManager.AppSettings["MailFrom"].ToString();

      string _to = string.Empty;

switch(ddlRegion.SelectedItem.Value)
{
case "1": _to = ConfigurationManager.AppSettings["MailToA"]; break;
case "2": _to = ConfigurationManager.AppSettings["MailToB"]; break;
case "3": _to = ConfigurationManager.AppSettings["MailToC"]; break;
case "4": _to = ConfigurationManager.AppSettings["MailToD"]; break;
}

and in the webconfig file I have:

At present which is working-

XML

<appSettings>
    <add key="SMTP_HOST_ADDRESS" value="mail.company.com"></add>
    <add key="CREDENTIAL_USER" value="yourcredentialuser"></add>
    <add key="CREDENTIAL_PASSWORD" value="credentialpassword"></add>
    <add key="MailFrom" value="Admin@company.com"></add>
    <add key="MailTo" value="admin1@company.com"></add>



  </appSettings>

After I changed the webconfig file

XML

<appSettings>
    <add key="SMTP_HOST_ADDRESS" value="mail.company.com"></add>
    <add key="CREDENTIAL_USER" value="yourcredentialuser"></add>
    <add key="CREDENTIAL_PASSWORD" value="credentialpassword"></add>
    <add key="MailTo_A" value="A@company.com"></add>
    <add key="MailTo_B" value="B@company.com"></add>
    <add key="MailTo_C" value="C@company.com"></add>
    <add key="MailTo_D" value="D@company.com"></add>
    <add key="MailFrom" value="Admin@company.com"></add>


  </appSettings>

Now when I click on submit on the form I am getting an error message
Object reference not set to an instance of an object.

If you require any more info please let me know.

Posted 30-Nov-12 2:45am

Zakizawa

Updated 11-Dec-12 11:00am

v12

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Tim Corey · Answer 1 · 2012-11-30T03:36:00

Solution 1

It looks like you have an issue here with your naming. In your config file, you call it MailTo_A but when you call it in code you call it MailToA. The one is missing the underscore.

Posted 30-Nov-12 3:36am

Tim Corey

Comments

Zakizawa 30-Nov-12 10:01am

@Tim: It did not help I changed it to:
<add key="MailToA" value="A@company.com">
<add key="MailToB" value="B@company.com">
<add key="MailToC" value="C@company.com">
<add key="MailToD" value="D@company.com">

Do I have to make any changes to cs file as well where its:
case "1": _to -> case "1": to?

Thomas Daniels · Answer 2 · 2012-12-01T05:25:00

Solution 2

Hi,

Read this article:
Sending an Email in C# with or without attachments: generic routine.[^]

Posted 1-Dec-12 5:25am

Thomas Daniels

Comments

Zakizawa 1-Dec-12 11:31am

tnx ProgramFOX. But which string shall i use. I got more confused now. The strings which I am using above are not correct??

007alok · Answer 3 · 2012-12-02T05:37:00

There is also a simple method

C#

import system.net.mail

then

C#

MailMessage mail = new MailMessage();
                        SmtpClient smtp = new SmtpClient();
                        smtp.Host = "smtp.gmail.com"; //Or Your SMTP Server Address
                        smtp.Credentials = new System.Net.NetworkCredential
                        ("Username", "password");//Or your Smtp Email ID and Password
                        smtp.EnableSsl = true;
                        
                        mail.From = new MailAddress("mail address");
                        mail.Subject = "mail subject";
                        mail.Body = "mail body";
                        mail.IsBodyHtml = true;
                        mail.To.Add("mail id seperated with comma");
                        mail.Bcc.Add("mail addresses"); 
//if you want that each and every get mail as individual
                        smtp.Send(mail);