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Orders.cs
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Orders.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace ResourceManagment
{
public partial class Orders : Form
{
public OleDbConnection connection = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=Resource.accdb;");
public Orders()
{
InitializeComponent();
}
void loadTable()
{
orderID.Visible = false;
string query = @"
SELECT
o.OrderID,
c.CustomerName,
p.ProductName,
o.OrderDate,
o.Quantity,
o.Completed
FROM
(Orders o
INNER JOIN
Customers c ON o.CustomerID = c.CustomerID)
INNER JOIN
Products p ON o.ProductID = p.ProductID;
";
OleDbCommand command = new OleDbCommand(query, connection);
OleDbDataAdapter adapter = new OleDbDataAdapter(command);
DataTable dataTable = new DataTable();
try
{
connection.Open();
adapter.Fill(dataTable);
dataGridView1.DataSource = dataTable;
}
catch (Exception ex)
{
MessageBox.Show("An error occurred: " + ex.Message);
}
comboBox1.Items.Clear();
comboBox2.Items.Clear();
OleDbCommand command2 = new OleDbCommand("SELECT CustomerName from Customers", connection);
OleDbDataReader dr = command2.ExecuteReader();
while (dr.Read())
{
comboBox1.Items.Add(dr[0]);
}
dr.Close();
OleDbCommand command3 = new OleDbCommand("SELECT ProductName from Products", connection);
OleDbDataReader dr2 = command3.ExecuteReader();
while (dr2.Read())
{
comboBox2.Items.Add(dr2[0]);
}
connection.Close();
}
private void addButton_Click(object sender, EventArgs e)
{
string query = @"
INSERT INTO Orders (CustomerID, ProductID, OrderDate, Quantity, Completed)
SELECT c.CustomerID, p.ProductID, @p1, @p2, @p3
FROM Customers c, Products p
WHERE c.CustomerName = @p4
AND p.ProductName = @p5;
";
if (comboBox1.Text != "" && comboBox2.Text != "" && numericUpDown1.Value != 0)
{
// Show confirmation dialog
DialogResult result = MessageBox.Show("Are you sure you want to insert this order?", "Confirm Insert", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (result == DialogResult.Yes)
{
connection.Close();
connection.Open();
OleDbCommand command = new OleDbCommand(query, connection);
// Add parameters in the correct order
command.Parameters.AddWithValue("@p1", dateTimePicker1.Value.ToString());
command.Parameters.AddWithValue("@p2", numericUpDown1.Value);
command.Parameters.AddWithValue("@p3", false);
command.Parameters.AddWithValue("@p4", comboBox1.Text);
command.Parameters.AddWithValue("@p5", comboBox2.Text);
try
{
command.ExecuteNonQuery();
MessageBox.Show("Order inserted successfully.");
}
catch (Exception ex)
{
MessageBox.Show("Error: " + ex.Message);
}
connection.Close();
loadTable();
}
}
else
{
MessageBox.Show("Name or Product can't be empty", "Error", MessageBoxButtons.OK, MessageBoxIcon.Question);
}
}
private void updateButton_Click(object sender, EventArgs e)
{
bool isCompleted =false;
connection.Open();
OleDbCommand command2 = new OleDbCommand("SELECT Completed from Orders", connection);
OleDbDataReader dr = command2.ExecuteReader();
while (dr.Read())
{
isCompleted = Convert.ToBoolean(dr[0].ToString());
}
dr.Close ();
connection.Close ();
if (!isCompleted)
{
DialogResult result = MessageBox.Show($"OrderID: {orderID.Text} will be finished are you sure?", "Attention", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);
if (result == DialogResult.OK)
{
connection.Open();
OleDbCommand command = new OleDbCommand("update Orders set Completed=@p1 WHERE OrderID=@p2", connection);
command.Parameters.AddWithValue("@P1", true);
command.Parameters.AddWithValue("@P2", orderID.Text);
command.ExecuteNonQuery();
connection.Close();
loadTable();
}
}
}
private void deleteButton_Click(object sender, EventArgs e)
{
if (orderID.Text != "label4")
{
connection.Open();
DialogResult result = MessageBox.Show($"OrderID: {orderID.Text} will be deleted are you sure?", "Attention", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);
if (result == DialogResult.OK)
{
OleDbCommand command2 = new OleDbCommand("DELETE FROM Orders WHERE OrderID=@P1", connection);
command2.Parameters.AddWithValue("@P1", orderID.Text);
command2.ExecuteNonQuery();
connection.Close();
loadTable();
}
connection.Close();
}
}
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
int choosen = dataGridView1.SelectedCells[0].RowIndex;
comboBox1.Text = dataGridView1.Rows[choosen].Cells[1].Value.ToString();
numericUpDown1.Text = dataGridView1.Rows[choosen].Cells[4].Value.ToString();
comboBox2.Text = dataGridView1.Rows[choosen].Cells[2].Value.ToString();
orderID.Text = dataGridView1.Rows[choosen].Cells[0].Value.ToString();
}
private void Orders_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the 'resourceSet.Orders' table. You can move, or remove it, as needed.
// this.ordersTableAdapter.Fill(this.resourceSet.Orders);
loadTable();
}
private void comboBox1_KeyPress(object sender, KeyPressEventArgs e)
{
e.Handled = true;
}
private void comboBox2_KeyPress(object sender, KeyPressEventArgs e)
{
e.Handled = true;
}
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
}
}
}