How do you put a comma after the information from selected checkbox into a Textbox?
<pre><code>       foreach (GridViewRow row in GridView1.Rows)         
       {           
        var chk = row.FindControl("myCheckBox") as CheckBox;
        if (chk.Checked)
        {
        var email = row.FindControl("LabelEmail") as Label;
        txtEmails.Text += (string.Join(",", email.Text));
        }
</code></pre>

<p>I'm extracting the email from the grid view and suppose to put the email accordingly with a comma separating them. I tried using the string.join method however it's not appearing in the textbox at all. I tried not using string.join but the comma will be added beside every email. How do I separate the email properly? </p>

<p>Example : Helloworld@gmail.com, Helloeveryone@gmail.com, HelloBye@gmail.com</p>
