Canot convert from 'system.collection.generic.list<model>' to 'string'

Question

1.00/5 (1 vote)

See more:

i fetch email id through list but after adding it into

mail.To.Add(mails);

it will directly go to catch..

canot convert from 'System.Collection.Generic.List<Model>' to 'string'

give this error...

What I have tried:

<pre> var email =HomeworkReposities.get_studentdetails(classId, divisionId, subjectId);
                       
                           string mails =email.ToString();
                         string SMTP_HOST = "smtp.sendgrid.net";
                        string SMTP_PORT = "587";
                        try
                        {
                            System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage();
                            mail.To.Add(mails);

Posted 5-Oct-18 1:26am

Member 12227707

Add a Solution

Comments

littleGreenDude 5-Oct-18 7:35am

I recommend looking at the example in the following URL:

https://docs.microsoft.com/en-us/dotnet/api/system.net.mail.mailmessage?view=netframework-4.7.2

Richard MacCutchan 5-Oct-18 8:43am

You cannot convert a list of items to a string, you must take the items one at a time and concatenate them.

Member 12227707 6-Oct-18 1:37am

i want to send homework details at a time to all the student through mail....

Richard MacCutchan 6-Oct-18 3:59am

You create the variable email from HomeworkReposities.get_studentdetails(classId, divisionId, subjectId);. The error message indicates that this returns a System.Collections.Generic.List, which does not have a simple ToString method. You need to go through the list and extract each mail address to add to your mail message.

Member 12227707 6-Oct-18 4:50am

ok.thank u sir...

ZurdoDev 5-Oct-18 9:50am

What is mails? You need to fix that.

Member 12227707 6-Oct-18 1:35am

var email =HomeworkReposities.get_studentdetails(classId, divisionId, subjectId);

string mails =email.ToString();
mail.To.Add(new MailAddress(mails));

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)