private void btnDeleteCustomer_Click(object sender, EventArgs e)
{
if (dgvCustomer.SelectedRows.Count == 0) //validation that there is at least one row selected
{
MessageBox.Show("Please select a customer"); //if above statement is true, shows message box and end function execcution. Row is usually autoselected from the beginning but this is just a precaution
return;
}
DialogResult = MessageBox.Show("Are you sure you wish to delete the selected customer?", "Delete?", MessageBoxButtons.YesNo); //Dialogresult function to allow for check before deleting selected record
if (DialogResult == DialogResult.Yes)
{
foreach (DataRow row in dtCustomer.Rows) //if statement above is true, loops through each row of table
{
if (dgvCustomer.SelectedCells[0].Value.ToString() == row["custid"].ToString()) //check to see if selected dgvCustomer userid is the same as the table userid
{
using (SQLiteCommand cmd = conn.CreateCommand()) //if above is true, sets SQL query based on custid of table row in loop, opens connection, runs the query, closes the connection
{
cmd.CommandText = @"DELETE FROM customer Where custid = @custID";
cmd.Parameters.AddWithValue("custID", row["custid"].ToString());
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
}
}
}
Form form = new AllCustomers(); //refresh() not working, using new form load
form.Show();
this.Dispose();
}
else //if the statement is false, return without deleting
{
return;
}
}
private void btnCustomers_Click(object sender, EventArgs e) //lines 81 - 109 use buttons to open specific forms
{
Form NewForm = new AllCustomers();
NewForm.Show();
}
private void btnSubmitCustDetails_Click(object sender, EventArgs e)
{
if (string.IsNullOrWhiteSpace(txtCustTitle.Text) || string.IsNullOrWhiteSpace(txtCustFirstName.Text) || string.IsNullOrWhiteSpace(txtCustLastName.Text) || string.IsNullOrWhiteSpace(mtxtCustDOB.Text) ||
string.IsNullOrWhiteSpace(txtCustNICode.Text) || string.IsNullOrWhiteSpace(txtCustEmailAddress.Text) || string.IsNullOrWhiteSpace(txtCustPassword.Text) || string.IsNullOrWhiteSpace(txtCustAllowance.Text))
//lines 87 - 88 validates that there is data in the textboxes
{
MessageBox.Show("Please fill all the fields with correct information");
return;
}
if (DateTime.TryParse(mtxtCustDOB.Text, out DateTime format) != true) //validates the masked textbox data is in the correct data format and is an acceptable data
{
MessageBox.Show("Please enter a date in the correct format (DD/MM/YYYY)");
return;
}
if (int.TryParse(txtCustAllowance.Text, out int result) == false) //validates the allowance field in a number
{
MessageBox.Show("Please only use numbers in the 'Allowance' field");
return;
}
if (loadCommand == "add")
{
using (SQLiteCommand cmd = conn.CreateCommand()) //if line 104 is true, runs command to add a customer by opening a connection, running the query and closing the connection
{
cmd.CommandText = @"Insert into customer(title, firstname, lastname, dob, nicode, email, password, allowance) values (@title, @firstName, @lastName, @dob, @niCode, @email, @password, @allowance)";
cmd.Parameters.AddWithValue("title", txtCustTitle.Text);
cmd.Parameters.AddWithValue("firstName", txtCustFirstName.Text);
cmd.Parameters.AddWithValue("lastName", txtCustLastName.Text);
cmd.Parameters.AddWithValue("dob", mtxtCustDOB.Text);
cmd.Parameters.AddWithValue("niCode", txtCustNICode.Text);
cmd.Parameters.AddWithValue("email", txtCustEmailAddress.Text);
cmd.Parameters.AddWithValue("password", txtCustPassword.Text);
cmd.Parameters.AddWithValue("allowance", txtCustAllowance.Text);
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
}
DialogResult = MessageBox.Show("Customer details have been added", "Customer Details", MessageBoxButtons.OK); //opens message and then, on DialogResult, shows allCustomer form and disposes this form
if (DialogResult == DialogResult.OK)
{
allCustomers.Show();
this.Dispose();
}
}
else if (loadCommand == "update")
{
using (SQLiteCommand cmd = conn.CreateCommand()) //if line 130 is true, runs command to updates a customer by opening a connection, running the query and closing the connection
{
cmd.CommandText = @"UPDATE customer Set title = @title, firstname = @firstName, lastname = @lastName, dob = @dob,
nicode = @niCode, email = @email, password = @password, allowance = @allowance Where custid = @custID";
cmd.Parameters.AddWithValue("title", txtCustTitle.Text);
cmd.Parameters.AddWithValue("firstName", txtCustFirstName.Text);
cmd.Parameters.AddWithValue("lastName", txtCustLastName.Text);
cmd.Parameters.AddWithValue("dob", mtxtCustDOB.Text);
cmd.Parameters.AddWithValue("niCode", txtCustNICode.Text);
cmd.Parameters.AddWithValue("email", txtCustEmailAddress.Text);
cmd.Parameters.AddWithValue("password", txtCustPassword.Text);
cmd.Parameters.AddWithValue("allowance", txtCustAllowance.Text);
cmd.Parameters.AddWithValue("custID", txtCustID.Text);
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
}
DialogResult = MessageBox.Show("Customer details have been updated", "Customer Details", MessageBoxButtons.OK); //opens message and then, on DialogResult, shows allCustomer form and disposes this form
if (DialogResult == DialogResult.OK)
{
allCustomers.Show();
this.Dispose();
}
}
}