Отображение сообщения об успешном завершении после нажатия кнопки

Question

Приложение должно отображать сообщение «Успешно распределено» после нажатия кнопки «Отменить выделение». Пожалуйста, помогите мне понять, где разместить это сообщение об успехе. Мой код

protected void btnDeallocate_Click (отправитель объекта, EventArgs e ) {

    lblMsg.Text = "";
    string emp_ID = "";
    foreach (ListItem lst in chkListEmployee.Items)
    {
        if (lst.Selected)
        {
            emp_ID = emp_ID + lst.Value + ",";
        }
    }
    if (emp_ID.Length == 0)
    {
        lblMsg.Text = "Please select employee!";
        return;
    }
    if (emp_ID.Length > 0)
    {
        emp_ID = emp_ID.Substring(0, emp_ID.Length - 1);
    }
    System.Data.SqlClient.SqlTransaction transaction = null;
    System.Data.SqlClient.SqlConnection con = new System.Data.SqlClient.SqlConnection(EncryptionDecryption.conn());
    System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand();
    try
    {
        con.Open();
        transaction = con.BeginTransaction();

        cmd.Transaction = transaction;
        cmd.CommandTimeout = 500;

        cmd.Connection = con;
        //cmd.CommandText = "insert into ActionTrackLogMaping(Applications,UserID,Actions,Emp_ID) select 'UserManagerMapping', '" + UserID + "','D',Emp_ID from User_details ud where emp_ID in(" + emp_ID + ")";
        cmd.CommandText = "Insert Into ActionTrackLogMaping(Applications,UserID, Actions,Emp_ID,Proj_ID) select 'UserManagerMapping', '" + UserID + "','D',Emp_ID,'" + ddlProcess.SelectedValue + "' from User_details ud where emp_ID in(" + emp_ID + ")";
        cmd.CommandText = "Insert Into ActionTrackLogMaping(Applications,UserID, Actions,Emp_ID,Proj_ID) select 'UserManagerMapping', '" + UserID + "','D',Emp_ID,'" + ddlFunction.SelectedValue + "' from User_details ud where emp_ID in(" + emp_ID + ")";
        cmd.ExecuteNonQuery();

        cmd.CommandText = "delete from User_Project_Mapping where Emp_ID in(" + emp_ID + ") and proj_ID='" + ddlProcess.SelectedValue + "'";
        cmd.CommandText = "delete from User_Project_Mapping where Emp_ID in(" + emp_ID + ") ";
        cmd.ExecuteNonQuery();
        transaction.Commit();

       // lblMsg.Text = "Selected employees are de-allocated from process successfully!";
    }
    catch (Exception ex)
    {
        lblMsg.Text = "Error encountered while inserting data " + ex.Message;
        transaction.Rollback();
    }
    finally
    {
        con.Close();
        lblMsg.Text = "Selected employees are de-allocated from process successfully!";
        cmd = null;
        transaction = null;
    }
    //lblMsg.Text = "Selected employees are de-allocated from process successfully!";
    chkListEmployee.ClearSelection();
    bindEmployees();
   // lblMsg.Text = "Selected employees are de-allocated from process successfully!";
}