UpdateTask.xaml.cs

using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace FinalProjectApp
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class UpdateAssignment : Window
    {
        public UpdateAssignment()
        {
            InitializeComponent();
        }

        private void Cancel(object sender, RoutedEventArgs e)
        {
            TeacherHome th = new TeacherHome();
            th.Show();
            Close();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            string dbsCon = @"Data Source=LABSCIFIPC16\LOCALHOST;Initial Catalog=FinalProj;Integrated Security=True";
            SqlConnection sqlCon = new SqlConnection(dbsCon);

            using (sqlCon)
            {

                string q = "Update Assignments SET _name=@val1, dueDate=@val2, subject=@val3, classID=@val4 " +
                    "where id=@val;";
                SqlCommand cmd = new SqlCommand(q, sqlCon);
                cmd.Parameters.AddWithValue("@val", idBox.Text);
                cmd.Parameters.AddWithValue("@val1", name.Text);
                cmd.Parameters.AddWithValue("@val2", dueDater.Text);
                cmd.Parameters.AddWithValue("@val3", cboxSubj.Text);
                cmd.Parameters.AddWithValue("@val4", idComboBox.Text);
                try
                {
                    sqlCon.Open();
                    cmd.ExecuteNonQuery();

                    MessageBox.Show("Assignment updated successfully.");
                    TeacherHome th = new TeacherHome();
                    th.Show();
                    Close();
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
                finally
                {
                    sqlCon.Close();
                    Close();
                }
            }
        }


        private void Window_Loaded_1(object sender, RoutedEventArgs e)
        {
            FinalProjectApp.FinalProjDataSet1 finalProjDataSet1 = ((FinalProjectApp.FinalProjDataSet1)(this.FindResource("finalProjDataSet1")));
            // Load data into the table Classes. You can modify this code as needed.
            FinalProjectApp.FinalProjDataSet1TableAdapters.ClassesTableAdapter finalProjDataSet1ClassesTableAdapter = new FinalProjectApp.FinalProjDataSet1TableAdapters.ClassesTableAdapter();
            finalProjDataSet1ClassesTableAdapter.Fill(finalProjDataSet1.Classes);
            System.Windows.Data.CollectionViewSource classesViewSource1 = ((System.Windows.Data.CollectionViewSource)(this.FindResource("classesViewSource1")));
            classesViewSource1.View.MoveCurrentToFirst();
        }
    }
}