Send email to multiple users from listview - asp.net

Question

I want to get users email id in listview and whatever email generated by listview according to query. Now on send click I want all email id generated by listview to get that email.
I know how to bind listview but how can I get email to send mail?
Private Sub BindListView()
Dim constr As String = ConfigurationManager.ConnectionStrings("conio2").ConnectionString
Using con As New MySqlConnection(constr)
Using cmd As New MySqlCommand()
cmd.CommandText = "SELECT email FROM users where city = 'new york' order by ID asc"
cmd.Connection = con
Using sda As New MySqlDataAdapter(cmd)
Dim dt As New DataTable()
sda.Fill(dt)
emailList.DataSource = dt
emailList.DataBind()
End Using
End Using
End Using
End Sub

Answer 1

Suppose if you have ListView defined as below in the HTML part:
<asp:ListView ID="emailList" runat="server" ConvertEmptyStringToNull="False">
<ItemTemplate>
<asp:Label Text='<%# Eval("Email") %>' runat="server" ID="lblEmail"></asp:Label>
</ItemTemplate>
</asp:ListView>
You can enumerate over all the ListViewItems, get the Email IDs from the Label, and join it into a string str separated by comma (,) which can then be directly utilized for sending the email to multiple recipients.
Dim str As String = ""
For Each li As ListViewItem In emailList.Items
Dim lbl As Label = CType(li.FindControl("lblEmail"), Label)
If lbl.Text <> "" Then
str = str + lbl.Text + ","
End If
Next
str = str.Substring(0, str.Length - 1)
Use str within the message sending code as message.cc.Add(str)
where message is the object of System.Net.Mail.MailMessage

Answer 2

From what I understand you have some function (or sub), that sends e-mails and you just need to provide data to that function.
For simplicity let's name this:
Private Sub SendEmail(address as string, title as string, body as string)
I have also added two TextBoxes:
TextBoxTitle for holding e-mail title and
TextBoxBody for holding e-mail body
Here's the code:
Private Sub SendEmail_Click(sender As Object, e As EventArgs) Handles SendEmail.Click
For Each item As ListViewItem In emailList.Items
SendEmail(item.SubItems.Item(0).Text, TextBoxTitle.Text, TextBoxBody.Text)
Next
End Sub