/// <summary>
/// event handler when click sell button, update the vehicle table
/// </summary>
void btnSell_Click(object sender, EventArgs e)
{
try
{
_currentRow["OptionsPrice"] = _optionsCharge;
_currentRow["SoldBy"] = ((DataRowView)_salesStaffBindingSource.Current).Row["ID"];
_vehicleStockData.Update();
this.Close();
}
catch (Exception ex)
{
// Display an error message
AutomotiveManager.ShowMessage("An error occurred while attempting to sell the vehicle.",
"Database Error",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
AutomotiveManager.recordError(ex);
//close the form
this.Shown += new EventHandler(frmVehicleSale_Shown);
}
}
void txtTradeInAllowance_Validating(object sender, CancelEventArgs e)
{
//declare a errorMessage string and set it's default value to empty string
string errorMessage = string.Empty;
//invoke the IsNumber in the AutomotiveManager class to check if the text of TradeInAllowance could be parse to a number
if (!AutomotiveManager.IsNumber(txtTradeInAllowance.Text))
{
//set error message
errorMessage = "Please enter a numeric value.";
}
//parse the text of the TradeInAllowance textbox to decimal and check if it less than 0
else if (Decimal.Parse(txtTradeInAllowance.Text) < 0)
{
//set error message
errorMessage = "Please enter a value greater than or equal to zero.";
}
//check if the errorMessage is not an empty string
if (!errorMessage.Equals(string.Empty))
{
//set the CancelEventArgs' Cancel property to true
e.Cancel = true;
//invoke SetError method in errorProvider control and set the errorMessage to TradeInAllowance textbox
errorProvider.SetError(txtTradeInAllowance, errorMessage);
//set focus to TradeInAllowance textbox
txtTradeInAllowance.Focus();
}
}
/// <summary>
/// Handles the Load event of the form.
/// </summary>
private void frmEditVehicleStock_Load()
{
if (_editType == EditType.Eidt)
{
// Set the title of the form
this.Text = "Edit Vehicle";
try
{
// Bind data source to the form controls
bindControls();
}
catch (Exception ex)
{
// Display an error message
AutomotiveManager.ShowMessage("Could not load record.", "Database Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
AutomotiveManager.recordError(ex);
this.Shown += new EventHandler(delegate(object s, EventArgs evt)
{
this.Close();
});
}
}
else
{
// Set the title of the form
this.Text = "New Vehicle";
radAutomatic.Checked = true;
}
}
private void updateMonthlyPayment()
{
//invoke the Payment method in AutomotiveManager class use the parameter to calculate the value of MonthlyPayment lable
lblMonthlyPayment.Text = (AutomotiveManager.Payment((Decimal)hsbInterestRate.Value / 10000m / 12m,
hsbNoOfYear.Value * 12m,
Decimal.Parse(lblAmountDue.Text.Substring(1, lblAmountDue.Text.Length - 1)))).ToString("c");
//set focus to VehicleSalePrice textbox
txtVehicleSalePrice.Focus();
}
/// <summary>
/// the method to save the current insert
/// </summary>
/// <returns>ture if SuccessfulSaved, false when failed</returns>
private bool saveCurrentRecord()
{
_errorFocus = false;
bool isSuccessfulSaved = false;
if (this.ValidateChildren())
{
try
{
// When the edit mode of the form is new
if (_editType == EditType.New)
{
// Get a reference to the data table from the bind source object
DataTable dataTable = (DataTable)_bindingSource.DataSource;
// Add a new row to the data table
DataRow row = dataTable.NewRow();
// Define all the columns and values in the row
row["StockNumber"] = txtStockNumber.Text.Trim();
row["ManufacturedYear"] = txtYear.Text.Trim();
row["Make"] = txtMake.Text.Trim();
row["Model"] = txtModel.Text.Trim();
row["Mileage"] = txtMileage.Text.Trim();
row["Automatic"] = radAutomatic.Checked;
row["Colour"] = txtColour.Text.Trim();
row["BasePrice"] = txtBasePrice.Text.Trim();
// Add the new row to the data table
dataTable.Rows.Add(row);
}
// Update the data set to the data source
_vehicleStockData.Update();
isSuccessfulSaved = true;
}
catch (Exception ex)
{
// Display an error message
AutomotiveManager.ShowMessage("An error occured while saving the contact.", "Save Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
AutomotiveManager.recordError(ex);
}
}
return(isSuccessfulSaved);
}
/// <summary>
/// load the salses staff information form the database
/// </summary>
private void frmSalesStaffSection_Load()
{
try
{
string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=AMDatabase.mdb";
string tableName = "SalesStaff";
string selectQuery =
string.Format("SELECT * FROM {0}", tableName);
// Construct an instance of the DataTier
_salesStaffData = new SalesStaffData(connectionString, tableName, selectQuery);
_salesStaffBindingSource = new BindingSource();
_salesStaffBindingSource.PositionChanged += new EventHandler(_salesStaffBindingSource_PositionChanged);
_salesStaffBindingSource.DataSource = _salesStaffData.GetAllRows();
bindControls();
updateUI();
}
catch (DbException dbex)
{
// Display an error message
AutomotiveManager.ShowMessage("An error occurred fetching sales staff data.",
"Database Error",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
AutomotiveManager.recordError(dbex);
//close the form
this.Shown += new EventHandler(frmVehicleSale_Shown);
}
catch (NullReferenceException nuex)
{
// Display an error message
AutomotiveManager.ShowMessage("There are currently no sales staff entered in the system.",
"Vehicle Sale",
MessageBoxButtons.OK,
MessageBoxIcon.Exclamation);
AutomotiveManager.recordError(nuex);
//close the form
this.Shown += new EventHandler(frmVehicleSale_Shown);
}
}
/// <summary>
/// the event handler to check if the value of textbox is a year value(4 digits)
/// </summary>
void txtYear_Validating(object sender, CancelEventArgs e)
{
if (!AutomotiveManager.IsNumber(txtYear.Text.Trim()) || txtYear.Text.Trim().Length != 4)
{
// Prevents the validated event from being triggered
e.Cancel = true;
if (!_errorFocus)
{
((TextBox)sender).Focus();
_errorFocus = true;
}
// Show the error icon beside the control
errorProvider.SetError(txtYear, "Please enter a valid four digit year. Eg. 1977");
}
}
/// <summary>
/// the event handler to check if the value of textbox is a numeric value
/// </summary>
void txtNumeric_Validating(object sender, CancelEventArgs e)
{
if (!AutomotiveManager.IsNumber(((TextBox)sender).Text.Trim()))
{
// Prevents the validated event from being triggered
e.Cancel = true;
if (!_errorFocus)
{
((TextBox)sender).Focus();
_errorFocus = true;
}
// Show the error icon beside the control
errorProvider.SetError(((Control)sender), "Please enter a numeric value for this field.");
}
}
/// <summary>
/// Handles the Load event of the form.
/// </summary>
private void frmVehicleStock_Load()
{
// Get string data from the Resources.resx file
string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=AMDatabase.mdb";
string tableName = "VehicleStock";
string selectQuery =
string.Format("SELECT ID, StockNumber, ManufacturedYear, Make, Model, Mileage, Automatic, Colour, BasePrice, SoldBy, OptionsPrice FROM {0} WHERE SoldBy = 0", tableName);
try
{
// Construct an instance of the DataTier
_vehicleStockData = new VehicleStockData(connectionString, tableName, selectQuery);
// Constructs a BindingSource object
// BindingSource - defines the data source of the form.
_bindingSource = new BindingSource();
// Set the data source of the form to the data table from the DataTier
_bindingSource.DataSource = _vehicleStockData.GetAllRows();
// Set the data source of the DataGridView to the binding source
dgvVehicles.DataSource = _bindingSource;
// Hides the ID column in the datagrid view
dgvVehicles.Columns["ID"].Visible = false;
// Hides the SoldBy column in the datagrid view
dgvVehicles.Columns["SoldBy"].Visible = false;
// Hides the OptionsPrice column in the datagrid view
dgvVehicles.Columns["OptionsPrice"].Visible = false;
}
catch (Exception ex)
{
// Display an error message
AutomotiveManager.ShowMessage("An error occurred fetching vehicle stock data.",
"Database Error",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
AutomotiveManager.recordError(ex);
this.Shown += new EventHandler(frmVehicleStock_Shown);
}
}
/// <summary>
/// the event handler when click the remove context menu in vehicle data grid view
/// </summary>
private void mnuRemove_Click(object sender, EventArgs e)
{
// Get a reference to the selected row
DataGridViewRow selectedRow = dgvVehicles.CurrentRow;
DialogResult result = AutomotiveManager.ShowMessage(String.Format("Are you sure you want to remove {0} {1} {2}",
selectedRow.Cells["ManufacturedYear"].Value,
selectedRow.Cells["Make"].Value,
selectedRow.Cells["Model"].Value),
"Remove Vehicle",
MessageBoxButtons.YesNo,
MessageBoxIcon.Warning,
MessageBoxDefaultButton.Button2);
if (result == DialogResult.Yes)
{
try
{
// Remove the row from the datagridview's row collection
dgvVehicles.Rows.Remove(selectedRow);
// Update the data source bound to the datagridview
this._vehicleStockData.Update();
// When rows still exist in the data grid view
if (dgvVehicles.Rows.Count > 0)
{
// Select the last row
dgvVehicles.Rows[dgvVehicles.Rows.Count - 1].Selected = true;
}
}
catch (Exception ex)
{
// Display an error message
AutomotiveManager.ShowMessage(String.Format("An error occurred removing {0} {1} {2}",
selectedRow.Cells["ManufacturedYear"].Value,
selectedRow.Cells["Make"].Value,
selectedRow.Cells["Model"].Value),
"Database Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
AutomotiveManager.recordError(ex);
}
}
}
void lnkResetForm_Click(object sender, EventArgs e)
{
//declare a DialogResult and invoke ShowMessage method in the AutomotiveManager class to set the default value
DialogResult result =
AutomotiveManager.ShowMessage("Do you want to reset this sales quote?", "Sales Quote", MessageBoxButtons.YesNo);
//check if the user click the yes button
if (result == DialogResult.Yes)
{
//invoke unwrapEventHandlerForRadChk method to unwrap the EventHandler from the checkbox and radio buttons
unwrapEventHandlerForRadChk();
//invoke clearForm method
clearForm();
}
else
{
//set focus to VehicleSalePrice textbox
txtVehicleSalePrice.Focus();
}
}
public frmCarWash()
{
InitializeComponent();
//initial the CobListLoad
CobListLoad = true;
try
{
loadData();
//set the data to the combom box
foreach (DropDownItem item in _packageItems)
{
cboPackage.Items.Add(item.Description);
}
foreach (DropDownItem item in _fragranceItems)
{
cboFragrance.Items.Add(item.Description);
}
}
catch (FileNotFoundException fileNotFoundException)
{
AutomotiveManager.ShowMessage("An error occurred while loading car wash data.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
//when occour the error print the error file
AutomotiveManager.recordError(fileNotFoundException);
//when occour the error set to false
CobListLoad = false;
}
cboPackage.SelectedValueChanged += new EventHandler(cboPackage_SelectedValueChanged);
cboFragrance.SelectedValueChanged += new EventHandler(cboFragrance_SelectedValueChanged);
mnuCarWashGenerateInvoice.Click += new EventHandler(mnuCarWashGenerateInvoice_Click);
//check if the cobom box have load the items
if (cboPackage.Items.Count * cboFragrance.Items.Count > 0)
{
cboPackage.SelectedIndex = 0;
cboFragrance.SelectedIndex = 2;
}
}
/// <summary>
/// the event handler when close the form
/// </summary>
void frmEditVehicleStock_FormClosing(object sender, FormClosingEventArgs e)
{
// Applies pending changes to the binding source
_bindingSource.EndEdit();
// When the edit mode is new or current row has changes
if (_editType == EditType.New || ((DataRowView)_bindingSource.Current).Row.RowState == DataRowState.Modified)
{
// When this event is not triggered from the btnSave_Click event
if (_result == DialogResult.None)
{
// Ask the user if they wish to save the changes
_result = AutomotiveManager.ShowMessage("Save changes?", "New Vehicle Stock or Edit Vehicle Stock", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Exclamation, MessageBoxDefaultButton.Button3);
}
// Evaluate the users choice
switch (_result)
{
case DialogResult.Yes:
// Cancels the form close when the record cannot be saved
e.Cancel = !saveCurrentRecord();
break;
case DialogResult.No:
// Rollback changes made to the data source
((DataTable)_bindingSource.DataSource).RejectChanges();
break;
case DialogResult.Cancel:
// Cancels the form close
e.Cancel = true;
break;
}
}
// Reset the dialog result
_result = DialogResult.None;
}
/// <summary>
/// Cost textbox validating
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void txtCost_Validating(object sender, CancelEventArgs e)
{
string errorMessage = string.Empty;
if (!AutomotiveManager.IsNumber(txtCost.Text))
{
errorMessage = "Please enter a numeric value.";
}
else if (Decimal.Parse(txtCost.Text) < 0)
{
errorMessage = "Please enter a value greater than zero.";
}
if (!errorMessage.Equals(string.Empty))
{
//set the CancelEventArgs' Cancel property to true
e.Cancel = true;
//invoke SetError method in errorProvider control and set the errorMessage to Cost textbox
errorProvider.SetError(txtCost, errorMessage);
//set focus to Cost textbox
txtCost.Focus();
}
}
/// <summary>
/// the method to load the VehicleStock combo box
/// </summary>
private void frmQuote_Load(int selectedIndex = 0)
{
try
{
string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=AMDatabase.mdb";
string tableName = "VehicleStock";
string selectQuery = string.Format("SELECT * FROM {0} WHERE SoldBy = 0", tableName);
//string selectQuery = string.Format("SELECT * FROM {0}", tableName);
// Construct an instance of the DataTier
_vehicleStockData = new VehicleStockData(connectionString, tableName, selectQuery);
_bindingSource = new BindingSource();
_bindingSource.DataSource = _vehicleStockData.GetAllRows();
//Filters the data source to only show rows that have a value of 0 in column SoldBy
//_bindingSource.Filter = "SoldBy = 0";
cboVehicleStock.DataSource = _bindingSource;
cboVehicleStock.DisplayMember = "StockNumber";
cboVehicleStock.ValueMember = "BasePrice";
//cboVehicleStock.DataBindings.Add("Text", _bindingSource, "StockNumber");
cboVehicleStock.SelectedValueChanged += new EventHandler(btnCalculateQuote_Click);
if (cboVehicleStock.Items.Count > selectedIndex)
{
cboVehicleStock.SelectedIndex = selectedIndex;
}
else
{
cboVehicleStock.SelectedIndex = selectedIndex - 1;
}
if (this.ValidateChildren() && cboVehicleStock.Items.Count != 0)
{
//invoke bindEventHandlerForRadChk method to bind functions to radio buttons and checkboxes
bindEventHandlerForRadChk();
//invoke UpdateSummaryFinance method to update summary and finance section
UpdateSummaryFinance();
}
}
catch (DbException dbex)
{
// Display an error message
AutomotiveManager.ShowMessage("An error occurred fetching vehicle stock data.",
"Database Error",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
AutomotiveManager.recordError(dbex);
//close the form
this.Shown += new EventHandler(frmQuote_Shown);
}
catch (NullReferenceException nuex)
{
// Display an error message
AutomotiveManager.ShowMessage("There are currently no vehicles in stock to sell.",
"Vehicle Sale",
MessageBoxButtons.OK,
MessageBoxIcon.Warning);
AutomotiveManager.recordError(nuex);
//close the form
this.Shown += new EventHandler(frmQuote_Shown);
}
}
