发送电子邮件

protected void btnSendEmail_Click(object sender, EventArgs e)
{
List<string> listEmail = new List<string>();
//遍历GridView找到要发送邮件的联系人，并得到他们的Email放入List中
foreach (GridViewRow row in GridView1.Rows)
{
CheckBox cbSelect = (CheckBox)row.FindControl("CheckBox1");
if (cbSelect.Checked)
{
//得到该联系人的Fid
int friendId = Convert.ToInt32(GridView1.DataKeys[row.RowIndex]["fid"]);
String email = FriendBLL.getEmailById(friendId);
listEmail.Add(email);
}
}
//形成mailto发送字符串
StringBuilder strMailTo = new StringBuilder("mailto:");
foreach (String email in listEmail)
{
strMailTo.Append(email + ";");
}
strMailTo.Remove(strMailTo.Length - 1, 1);
//Label1.Text = strMailTo.ToString();
strMailTo.Append("?subject=Welcome");
Response.Write("<script>window.location.href='" + strMailTo+"'</script>");
}