Unable to send email update upon insertion of data

I'm trying to allow my webapp to send an email update whenever a data is being inserted into the database like the codes i'll show below.

This is a btnAssign where it will update the relevant database table and column with data

protected void btnAssign_Click1(object sender, EventArgs e)
{
using (var connAdd = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString))
{

String assign = ddlpid1.SelectedValue;

connAdd.Open();
var sql = "Update MemberReport Set assignto ='" + assign + "', caseprogress = 'ongoing' where memberreportID='" + lbmemberreportid.Text + "'";
using (var cmdAdd = new SqlCommand(sql, connAdd))
{
cmdAdd.ExecuteNonQuery();

}

sql = "Insert into PoliceReport(memberreportid) values('" + lbmemberreportid.Text + "')";
// sql = "Update PoliceAccount Set handle ='" + assign + "' where policeid ='" + ddlpid1.SelectedValue + "' OR '" + ddlpid2.SelectedValue + "'";
using (var cmdAdd = new SqlCommand(sql, connAdd))
{
cmdAdd.ExecuteNonQuery();
}

sql = "Update PoliceAccount Set handle ='" + lbmemberreportid.Text + "' where policeid ='" + ddlpid1.SelectedValue + "'";
// sql = "Update PoliceAccount Set handle ='" + assign + "' where policeid ='" + ddlpid1.SelectedValue + "' OR '" + ddlpid2.SelectedValue + "'";
using (var cmdAdd = new SqlCommand(sql, connAdd))
{
cmdAdd.ExecuteNonQuery();
}
}

The insertion / updating of database part is working fine. When i addthe smtp codes to send email by selecting a column, it didnt work.

SqlCommand cmd = new SqlCommand();
SqlDataReader dr;

//SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
//con.Open();
// get the records matching the supplied username or email id. 
cmd = new SqlCommand("select * from PoliceAccount where handle='" + lbmemberreportid.Text + "'", connAdd);


dr = cmd.ExecuteReader();
cmd.Dispose();
if (dr.HasRows)
{
dr.Read();


StringBuilder strBody = new StringBuilder();
//Passing emailid,username and generated unique code via querystring. For testing pass your localhost number and while making online pass your domain name instead of localhost path.
strBody.Append("<a>Please be notified that you've been assigned a case to handle. Please proceed to the scene with immediate effect.</a>");
// sbody.Append("&uCode=" + uniqueCode + "&uName=" + txtUserName.Text + ">Click here to change your password</a>");

System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage("apr13mpsip@gmail.com", dr["email"].ToString(), "Case Pending", strBody.ToString());
//pasing the Gmail credentials to send the email
System.Net.NetworkCredential mailAuthenticaion = new System.Net.NetworkCredential("apr13mpsip@gmail.com", "Temasekpoly13");

System.Net.Mail.SmtpClient mailclient = new System.Net.Mail.SmtpClient("smtp.gmail.com", 587);

mailclient.EnableSsl = true;
mailclient.Credentials = mailAuthenticaion;
mail.IsBodyHtml = true;
mailclient.Send(mail);
dr.Close();
dr.Dispose();
cmd.ExecuteReader();
cmd.Dispose();
//con.Close();
lbmemberreportid.Text = "";
ddllocation.SelectedIndex = 0;
ddlnumber.SelectedIndex = 0;
ddlpid1.SelectedIndex = 0;
tbdetails.Text = "";
tbproperty.Text = "";
tbsuspect.Text = "";
ddlpid1.Visible = false;

LoadGrid();

lblmsg.ForeColor = System.Drawing.Color.Green;
lblmsg.Text = "MemberReportID" + Session["memberreportid"] + "has been successfully assigned";

}


connAdd.Close();
}

To make matter worse, the label where the message is suppose to appear did not appear. Which means after inserting the data, the code basically stop running. I added a txtFile here if the code i pasted above is confusing.

http://www.filedropper.com/admintask

I really still cant figure out why does my email not run after inserting the data into the database.

Regards.

http://www.filedropper.com/admintask