Georgetown Cleaning Services

	Georgetown Cleaning Services

The Data View

In a database environment, a query is a list of values created from another list. For example, a query can be created from a table by isolating records that follow a criterion. The .NET Framework supports queries through the DataView class. With a DataView object, you can create a selected list of records and you can then perform all types of regular operations of a database object, including:

Sorting Records
Filtering Records
Creating a new record
Updating one or more existing records

To create a DataView object, you can first declare a pointer to DataView. If you are working in Microsoft Visual Studio, in the Data section of the Toolbox, you can click the DataView button and click a container such as a form. After creating a DataView object, to perform a desired operation on it, you can use the SQL.

Practical Learning: Creating the Application

Start Microsoft Visual Studio .NET or Visual C# and create a Windows Application named GCS3

Design it as follows:

Control	Name	Text	Additional Properties
GroupBox		Order Identification
Label		Customer Name:
TextBox	txtCustomerName
Label		Customer Phone:
TextBox	txtCustomerPhone
Label		Date Left:
DateTimePicker	dtpDateLeft		Format: Custom Custom Format: dddd MMM dd, yyyy
Label		Time Left:
DateTimePicker	dtpTimeLeft		Format: Time
Label		Date Expected:
DateTimePicker	dtpDateExpected		Format: Custom Custom Format: dddd MMM dd, yyyy
Label		Time Expected:
DateTimePicker	dtpTimeExpected		Format: Time
GroupBox		Order Processing
Label		Item Type
Label		Unit Price
Label		Qty
Label		Sub Total
Label		Shirts
TextBox	txtShirtsUnitPrice	0.95	TextAlign: Right
TextBox	txtShirtsQuantity	0	TextAlign: Right
Button	btnCalcShirts		Image: SubTotal.ico
TextBox	txtShirtsSubTotal	0.00	TextAlign: Right
Label		Pants
TextBox	txtPantsUnitPrice	1.75	TextAlign: Right
TextBox	txtPantsQuantity		TextAlign: Right
Button	btnCalcPants		Image: SubTotal.ico
TextBox	txtPantsSubTotal	0.00	TextAlign: Right
ComboBox	cboItem1	None
TextBox	txtItem1UnitPrice	0.00	TextAlign: Right
TextBox	txtItem1Quantity	0	TextAlign: Right
Button	btnCalcItem1		Image: SubTotal.ico
TextBox	txtItem1SubTotal	0.00	TextAlign: Right
ComboBox	cboItem2	None
TextBox	txtItem2UnitPrice	0.00	TextAlign: Right
TextBox	txtItem2Quantity	0	TextAlign: Right
Button	btnCalcItem2		Image: SubTotal.ico
TextBox	txtItem2SubTotal	0.00	TextAlign: Right
ComboBox	cboItem3	None
TextBox	txtItem3UnitPrice	0.00	TextAlign: Right
TextBox	txtItem3Quantity	0	TextAlign: Right
Button	btnCalcItem3		Image: SubTotal.ico
TextBox	txtItem3SubTotal	0.00	TextAlign: Right
ComboBox	cboItem4	None
TextBox	txtItem4UnitPrice	0.00	TextAlign: Right
TextBox	txtItem4Quantity	0	TextAlign: Right
Button	btnCalcItem4		Image: SubTotal.ico
TextBox	txtItem4SubTotal	0.00	TextAlign: Right
GroupBox		Order Summary
Label		Cleaning Total:
TextBox	txtOrderTotal	0.00	TextAlign: Right
Label		Tax Rate:
TextBox	txtTaxRate	5.75	TextAlign: Right
Label		%
Label		Tax Amount:
TextBox	txtTaxAmount	0.00	TextAlign: Right
Label		Order Total:
TextBox	txtOrderTotal	0.00	TextAlign: Right
Button	btnReset	Reset
Button	btnSave	Save
Label		Enter Receipt Number:
TextBox	txtReceiptNumber	0
Button	btnOpen	Open
Button	btnClose	Close

Click each combo box. Access its Items property and fill it up as follows:
Click OK and save All
On the Toolbox, click Data, click SqlDataAdapter and click an unoccupied area of the form
In the first page of the Data Adapter Configuration Wizard, click Next
In the second page of the wizard, click the arrow of the combo box. If you see a string that contains gcs, click it, and go to the next point.
If you don't see gcs in the list, click New Connection...
1. In the 1 combo box, select the server or type its name
2. In the 2 section, click the Use Windows NT Integrated Security radio button
3. In the 3 combo box, select the gcs database:
4. Click OK
Click Next
Accept the Use New SQL Statement option and click Next
Click Query Builder...
In the Add Table dialog box, make sure CleaningOrders is selected. Click Add and click Close
Click the *(All Columns) check box and click OK
Click Next
Click Finish
On the main menu, click Data -> Generate Dataset...
In the Generate Dataset dialog box, click the New radio button
Set the name to dsCleaningOrders
Click OK
In the Data section of the Toolbox, click DataView and click the form
In the Properties window, change its values as follows:
(Name): dvwCleaningOrder
Table: dsCleaningOrders1.CleaningOrders
Right-click the form and click View Code
Declare a private Boolean variable named IsNewOrder

bool IsNewOrder;

Return to the form, double-click an unoccupied area of the form to generate its Load event and implement it as follows:

private void Form1_Load(object sender, System.EventArgs e)
{
	IsNewOrder = true;
	this.sqlDataAdapter1.Fill(this.dsCleaningOrders1);
}

Return to the form, double-click the Reset button and implement its Click event as follows:

private void btnReset_Click(object sender, System.EventArgs e)
{
	IsNewOrder = true;

	this.txtCustomerName.Text = "";
	this.txtCustomerPhone.Text = "";
	this.dtpDateLeft.Value = DateTime.Today;
	this.dtpTimeLeft.Value = DateTime.Now;
	this.dtpDateExpected.Value = DateTime.Today;
	this.dtpTimeExpected.Value = DateTime.Now;

	this.txtShirtsUnitPrice.Text = "0.95";
	this.txtShirtsQuantity.Text = "0";
	this.txtShirtsSubTotal.Text = "0.00";
	this.txtPantsUnitPrice.Text = "1.95";
	this.txtPantsQuantity.Text  = "0";
	this.txtPantsSubTotal.Text  = "0.00";

	this.cboItem1.SelectedIndex = 0;
	this.txtItem1UnitPrice.Text = "0.00";
	this.txtItem1Quantity.Text  = "0";
	this.txtItem1SubTotal.Text  = "0.00";

	this.cboItem2.SelectedIndex = 0;
	this.txtItem2UnitPrice.Text = "0.00";
	this.txtItem2Quantity.Text  = "0";
	this.txtItem2SubTotal.Text  = "0.00";

	this.cboItem3.SelectedIndex = 0;
	this.txtItem3UnitPrice.Text = "0.00";
	this.txtItem3Quantity.Text  = "0";
	this.txtItem3SubTotal.Text  = "0.00";

	this.cboItem4.SelectedIndex = 0;
	this.txtItem4UnitPrice.Text = "0.00";
	this.txtItem4Quantity.Text  = "0";
	this.txtItem4SubTotal.Text  = "0.00";

	this.txtCleaningTotal.Text = "0.00";
	this.txtTaxRate.Text = "5.75";
	this.txtTaxAmount.Text = "0.00";
	this.txtOrderTotal.Text = "0.00";
         this.txtReceiptNumber.Text = S"0";
	this.txtCustomerName.Focus();
}

In the Class View, expand GCS3 followed by GCS3 and Form1
Right-click Form1 -> Add -> Add Method...
Set the characteristics as follows:
Method Access: internal
Return Type: void
Method Name: CalculateCleaningOrder

Click Finish and implement the method as follows:

internal void CalculateCleaningOrder()
{
	decimal unitPriceShirts = 0.95M, unitPricePants = 1.75M, unitPrice1 = 0.00M,
		unitPrice2 = 0.00M, unitPrice3 = 0.00M, unitPrice4 = 0.00M;
	int qtyShirts = 1, qtyPants = 1, quantity1 = 1,
		quantity2 = 1, quantity3 = 1, quantity4 = 1;
	decimal subTotalShirts = 0, subTotalPants = 0, subTotal1 = 0,
		subTotal2 = 0, subTotal3 = 0, subTotal4;

	decimal cleaningTotal = 0.00M, taxRate = 5.75M,
		taxAmount = 0.00M, orderTotal = 0.00M;

	// Retrieve the unit price of this item
	// Just in case the user types an invalid value, we are using a try...catch
	try 
	{
		unitPriceShirts = decimal.Parse(this.txtShirtsUnitPrice.Text);
	}
	catch(FormatException)
	{
	MessageBox.Show("The value you entered for the price of shirts is not valid" +
					"\nPlease try again");
	}

	// Retrieve the number of this item
	// Just in case the user types an invalid value, we are using a try...catch
	try 
	{
		qtyShirts  = int.Parse(this.txtShirtsQuantity.Text);
	}
	catch(FormatException)
	{
	MessageBox.Show("The value you entered for the number of shirts is not valid" +
					"\nPlease try again");
	}

	// Calculate the sub-total for this item
	subTotalShirts  = unitPriceShirts * qtyShirts;

	// Display the sub-total in the corresponding text box
	this.txtShirtsSubTotal.Text = subTotalShirts.ToString("F");

	try 
	{
		unitPricePants = decimal.Parse(this.txtPantsUnitPrice.Text);
	}
	catch(FormatException)
	{
	MessageBox.Show("The value you entered for the price of pants is not valid" +
					"\nPlease try again");
	}

	try 
	{
		qtyPants  = int.Parse(this.txtPantsQuantity.Text);
	}
	catch(FormatException)
	{
	MessageBox.Show("The value you entered for the number of pants is not valid" +
					"\nPlease try again");
	}

	subTotalPants  = unitPricePants * qtyPants;
	this.txtPantsSubTotal.Text = subTotalPants.ToString("F");

	try 
	{
		unitPrice1 = decimal.Parse(this.txtItem1UnitPrice.Text);
	}
	catch(FormatException)
	{
	MessageBox.Show("The value you entered for the price is not valid" +
					"\nPlease try again");
	}

	try 
	{
		quantity1  = int.Parse(this.txtItem1Quantity.Text);
	}
	catch(FormatException)
	{
		MessageBox.Show("The value you entered is not valid" +
				"\nPlease try again");
	}

	subTotal1  = unitPrice1 * quantity1;
	this.txtItem1SubTotal.Text = subTotal1.ToString("F");

	try 
	{
		unitPrice2 = decimal.Parse(this.txtItem2UnitPrice.Text);
	}
	catch(FormatException)
	{
	MessageBox.Show("The value you entered for the price is not valid" +
			"\nPlease try again");
	}

	try 
	{
		quantity2  = int.Parse(this.txtItem2Quantity.Text);
	}
	catch(FormatException)
	{
	MessageBox.Show("The value you entered is not valid" +
			"\nPlease try again");
	}

	subTotal2  = quantity2 * unitPrice2;
	this.txtItem2SubTotal.Text = subTotal2.ToString("F");

	try 
	{
		quantity3  = int.Parse(this.txtItem3Quantity.Text);
	}
	catch(FormatException)
	{
		MessageBox.Show("The value you entered is not valid" +
				"\nPlease try again");
	}

	try 
	{
		unitPrice3 = decimal.Parse(this.txtItem3UnitPrice.Text);
	}
	catch(FormatException)
	{
		MessageBox.Show("The value you entered for the price is not valid" +
				"\nPlease try again");
	}

	subTotal3  = quantity3 * unitPrice3;
	this.txtItem3SubTotal.Text = subTotal3.ToString("F");

	try 
	{
		unitPrice4 = decimal.Parse(this.txtItem4UnitPrice.Text);
	}
	catch(FormatException)
	{
		MessageBox.Show("The value you entered for the price is not valid" +
				"\nPlease try again");
	}
	try 
	{
		quantity4  = int.Parse(this.txtItem4Quantity.Text);
	}
	catch(FormatException)
	{
		MessageBox.Show("The value you entered is not valid" +
				"\nPlease try again");
	}

	subTotal4  = quantity4 * unitPrice4;
	this.txtItem4SubTotal.Text = subTotal4.ToString("F");

	// Calculate the total
	cleaningTotal = subTotalShirts + subTotalPants + subTotal1 +
			subTotal2 + subTotal3 + subTotal4;

	// Retrieve the value of the tax rate
	try 
	{
		taxRate = decimal.Parse(this.txtTaxRate.Text);
	}
	catch(FormatException)
	{
		MessageBox.Show("The tax rate you entered is invalid" +
				"\nPlease try again");
	}

	// Calculate the amount owed for the taxes
	taxAmount = cleaningTotal * taxRate / 100;
	// Add the tax amount to the total order
	orderTotal  = cleaningTotal + taxAmount;
			
	// Display the values of the order summary
	this.txtCleaningTotal.Text = cleaningTotal.ToString("F");
	this.txtTaxAmount.Text  = taxAmount.ToString("F");
	this.txtOrderTotal.Text   = orderTotal.ToString("F");
}

Return to the form and double-click the Save button
In the top section of the file, under the other using lines, type:

using System.Data.SqlClient;

Implement its event as follows:

private void btnSave_Click(object sender, System.EventArgs e)
{
	if( IsNewOrder == true )
	{
		string strInsert = "INSERT INTO CleaningOrders(" +
			"CustomerName, CustomerPhone, DateLeft, " +
			"TimeLeft, DateExpected, TimeExpected, " +
			"ShirtsUnitPrice, ShirtsQuantity, " +
			"ShirtsSubTotal, PantsUnitPrice, " +
			"PantsQuantity, PantsSubTotal, Item1Name, " + 
			"Item1UnitPrice, Item1Quantity, " +
			"Item1SubTotal, Item2Name, Item2UnitPrice, " +
			"Item2Quantity, Item2SubTotal, Item3Name, " +
			"Item3UnitPrice, Item3Quantity, " +
			"Item3SubTotal, Item4Name, Item4UnitPrice, " +
		"Item4Quantity, Item4SubTotal, CleaningTotal, " +
			"TaxRate, TaxAmount, OrderTotal) VALUES(" +
			"'" + txtCustomerName.Text +
			"', '" + txtCustomerPhone.Text +
			"', '" + dtpDateLeft.Value +
			"', '" + dtpTimeLeft.Value +
			"', '" + dtpDateExpected.Value +
			"', '" + dtpTimeExpected.Value +
			"', '" + txtShirtsUnitPrice.Text +
			"', '" + txtShirtsQuantity.Text +
			"', '" + txtShirtsSubTotal.Text +
			"', '" + txtPantsUnitPrice.Text +
			"', '" + txtPantsQuantity.Text +
			"', '" + txtPantsSubTotal.Text +
			"', '" + cboItem1.Text +
			"', '" + txtItem1UnitPrice.Text +
			"', '" + txtItem1Quantity.Text +
			"', '" + txtItem1SubTotal.Text +
			"', '" + cboItem2.Text +
			"', '" + txtItem2UnitPrice.Text +
			"', '" + txtItem2Quantity.Text +
			"', '" + txtItem2SubTotal.Text +
			"', '" + cboItem3.Text +
			"', '" + txtItem3UnitPrice.Text +
			"', '" + txtItem3Quantity.Text +
			"', '" + txtItem3SubTotal.Text + 
			"', '" + cboItem4.Text +
			"', '" + txtItem4UnitPrice.Text +
			"', '" + txtItem4Quantity.Text +
			"', '" + txtItem4SubTotal.Text +
			"', '" + txtCleaningTotal.Text +
			"', '" + txtTaxRate.Text +
			"', '" + txtTaxAmount.Text +
			"', '" + txtOrderTotal.Text + "');";

SqlCommand cmdDatabase = new SqlCommand(strInsert, sqlConnection1);

		sqlConnection1.Open();

		cmdDatabase.ExecuteNonQuery();
		sqlConnection1.Close();

		this.btnReset_Click(sender, e);
	}
}

Display the form and double-click the Open button

Implement the event as follows:

private void btnOpen_Click(object sender, System.EventArgs e)
{
	if( this.txtReceiptNumber.Text == "" )
	{
		MessageBox.Show("Please enter a receipt number");
		this.txtReceiptNumber.Focus();
		return;
	}

	int iReceiptNumber = int.Parse(this.txtReceiptNumber.Text);

	this.sqlDataAdapter1.Fill(this.dsCleaningOrders1);
this.dvwCleaningOrder.RowFilter = "CleaningOrderID = '" + iReceiptNumber.ToString() + "'";

	this.txtCustomerName.DataBindings.Clear();
	this.txtCustomerPhone.DataBindings.Clear();
	this.dtpDateLeft.DataBindings.Clear();
	this.dtpTimeLeft.DataBindings.Clear();
	this.dtpDateExpected.DataBindings.Clear();
	this.dtpTimeExpected.DataBindings.Clear();
	this.txtShirtsUnitPrice.DataBindings.Clear();
	this.txtShirtsQuantity.DataBindings.Clear(); 
	this.txtShirtsSubTotal.DataBindings.Clear();
	this.txtPantsUnitPrice.DataBindings.Clear();
	this.txtPantsQuantity.DataBindings.Clear();
	this.txtPantsSubTotal.DataBindings.Clear(); 
	this.cboItem1.DataBindings.Clear(); 
	this.txtItem1UnitPrice.DataBindings.Clear(); 
	this.txtItem1Quantity.DataBindings.Clear(); 
	this.txtItem1SubTotal.DataBindings.Clear(); 
	this.cboItem2.DataBindings.Clear(); 
	this.txtItem2UnitPrice.DataBindings.Clear(); 
	this.txtItem2Quantity.DataBindings.Clear(); 
	this.txtItem2SubTotal.DataBindings.Clear(); 
	this.cboItem3.DataBindings.Clear(); 
	this.txtItem3UnitPrice.DataBindings.Clear(); 
	this.txtItem3Quantity.DataBindings.Clear(); 
	this.txtItem3SubTotal.DataBindings.Clear(); 
	this.cboItem4.DataBindings.Clear(); 
	this.txtItem4UnitPrice.DataBindings.Clear(); 
	this.txtItem4Quantity.DataBindings.Clear(); 
	this.txtItem4SubTotal.DataBindings.Clear(); 
	this.txtCleaningTotal.DataBindings.Clear(); 
	this.txtTaxRate.DataBindings.Clear(); 
	this.txtTaxAmount.DataBindings.Clear(); 
	this.txtOrderTotal.DataBindings.Clear();

	this.txtCustomerName.DataBindings.Add("Text", this.dvwCleaningOrder, "CustomerName");
	this.txtCustomerPhone.DataBindings.Add("Text", this.dvwCleaningOrder, "CustomerPhone");
	this.dtpDateLeft.DataBindings.Add("Value", this.dvwCleaningOrder, "DateLeft");
	this.dtpTimeLeft.DataBindings.Add("Value", this.dvwCleaningOrder, "TimeLeft");
	this.dtpDateExpected.DataBindings.Add("Value", this.dvwCleaningOrder, "DateExpected");
	this.dtpTimeExpected.DataBindings.Add("Value", this.dvwCleaningOrder, "TimeExpected");
	this.txtShirtsUnitPrice.DataBindings.Add("Text", this.dvwCleaningOrder, "ShirtsUnitPrice");
	this.txtShirtsQuantity.DataBindings.Add("Text", this.dvwCleaningOrder, "ShirtsQuantity");
	this.txtShirtsSubTotal.DataBindings.Add("Text", this.dvwCleaningOrder, "ShirtsSubTotal");
	this.txtPantsUnitPrice.DataBindings.Add("Text", this.dvwCleaningOrder, "PantsUnitPrice");
	this.txtPantsQuantity.DataBindings.Add("Text", this.dvwCleaningOrder, "PantsQuantity");
	this.txtPantsSubTotal.DataBindings.Add("Text", this.dvwCleaningOrder, "PantsSubTotal");
	this.cboItem1.DataBindings.Add("Text", this.dvwCleaningOrder, "Item1Name");
	this.txtItem1UnitPrice.DataBindings.Add("Text", this.dvwCleaningOrder, "Item1UnitPrice");
	this.txtItem1Quantity.DataBindings.Add("Text", this.dvwCleaningOrder, "Item1Quantity");
	this.txtItem1SubTotal.DataBindings.Add("Text", this.dvwCleaningOrder, "Item1SubTotal");
	this.cboItem2.DataBindings.Add("Text", this.dvwCleaningOrder, "Item2Name");
	this.txtItem2UnitPrice.DataBindings.Add("Text", this.dvwCleaningOrder, "Item2UnitPrice");
	this.txtItem2Quantity.DataBindings.Add("Text", this.dvwCleaningOrder, "Item2Quantity");
	this.txtItem2SubTotal.DataBindings.Add("Text", this.dvwCleaningOrder, "Item2SubTotal");
	this.cboItem3.DataBindings.Add("Text", this.dvwCleaningOrder, "Item3Name");
	this.txtItem3UnitPrice.DataBindings.Add("Text", this.dvwCleaningOrder, "Item3UnitPrice");
	this.txtItem3Quantity.DataBindings.Add("Text", this.dvwCleaningOrder, "Item3Quantity");
	this.txtItem3SubTotal.DataBindings.Add("Text", this.dvwCleaningOrder, "Item3SubTotal");
	this.cboItem4.DataBindings.Add("Text", this.dvwCleaningOrder, "Item4Name");
	this.txtItem4UnitPrice.DataBindings.Add("Text", this.dvwCleaningOrder, "Item4UnitPrice");
	this.txtItem4Quantity.DataBindings.Add("Text", this.dvwCleaningOrder, "Item4Quantity");
	this.txtItem4SubTotal.DataBindings.Add("Text", this.dvwCleaningOrder, "Item4SubTotal");
	this.txtCleaningTotal.DataBindings.Add("Text", this.dvwCleaningOrder, "CleaningTotal");
	this.txtTaxRate.DataBindings.Add("Text", this.dvwCleaningOrder, "TaxRate");
	this.txtTaxAmount.DataBindings.Add("Text", this.dvwCleaningOrder, "TaxAmount");
	this.txtOrderTotal.DataBindings.Add("Text", this.dvwCleaningOrder, "OrderTotal");

	IsNewOrder = false;
}

In the Class View, right-click Form1 -> Add -> Add Method...
Set the characteristics as follows:
Method Access: internal
Return Type: void
Function Name: UpdateCleaningOrder

Click Finish and implement the event as follows:

/// <summary>
/// This method is used to update an existing record if the user changes any of its values
/// </summary>
internal void UpdateCleaningOrder()
{
	// Find out if this is a new, usually started as blank, order
	 // If it is, trust that the user will save it by clicking the Save button
	 // If it's not, then, if the user changed the string that was in the
	 // Customer Name text box, update the current record
	 if( IsNewOrder == false )
	 {
	 string strUpdate = "UPDATE CleaningOrders " +
                       "SET CustomerName = '" +  this.txtCustomerName.Text + "', " +
		 "CustomerPhone = '" +  this.txtCustomerPhone.Text + "', " +
		 "DateLeft = '" + this.dtpDateLeft.Value.ToString() + "', " +
		 "TimeLeft = '" + this.dtpTimeLeft.Value.ToString() + "', " +
		"DateExpected = '" + this.dtpDateExpected.Value.ToString() + "', " +
		"TimeExpected = '" + this.dtpTimeExpected.Value.ToString() + "', " +
		"ShirtsUnitPrice = '" + this.txtShirtsUnitPrice.Text + "', " +
		"ShirtsQuantity = '" + this.txtShirtsQuantity.Text + "', " +
		"ShirtsSubTotal = '" + this.txtShirtsSubTotal.Text + "', " +
		"PantsUnitPrice = '" + this.txtPantsUnitPrice.Text + "', " +
		"PantsQuantity = '" + this.txtPantsQuantity.Text + "', " +
		"PantsSubTotal = '" + this.txtPantsSubTotal.Text + "', " +
		"Item1Name = '" + this.cboItem1.Text + "', " +
		"Item1UnitPrice = '" + this.txtItem1UnitPrice.Text + "', " +
		"Item1Quantity = '" + this.txtItem1Quantity.Text + "', " +
		"Item1SubTotal = '" + this.txtItem1SubTotal.Text + "', " +
		"Item2Name = '" + this.cboItem2.Text + "', " +
		"Item2UnitPrice = '" + this.txtItem2UnitPrice.Text + "', " +
		"Item2Quantity = '" + this.txtItem2Quantity.Text + "', " +
		"Item2SubTotal = '" + this.txtItem2SubTotal.Text + "', " +
		"Item3Name = '" + this.cboItem3.Text + "', " +
		"Item3UnitPrice = '" + this.txtItem3UnitPrice.Text + "', " +
		"Item3Quantity = '" + this.txtItem3Quantity.Text + "', " +
		"Item3SubTotal = '" + this.txtItem3SubTotal.Text + "', " +
		"Item4Name = '" + this.cboItem4.Text + "', " +
		"Item4UnitPrice = '" + this.txtItem4UnitPrice.Text + "', " +
		"Item4Quantity = '" + this.txtItem4Quantity.Text + "', " +
		"Item4SubTotal = '" + this.txtItem4SubTotal.Text + "', " +
		"CleaningTotal = '" + this.txtCleaningTotal.Text + "', " +
		"TaxRate = '" + this.txtTaxRate.Text + "', " +
		"TaxAmount = '" + this.txtTaxAmount.Text + "', " +
		"OrderTotal = '" + this.txtOrderTotal.Text + "' " +
		"WHERE CleaningOrderID = '" +
		this.txtReceiptNumber.Text + "';";

	 SqlCommand    cmdDatabase = new SqlCommand(strUpdate, sqlConnection1);

	 sqlConnection1.Open();

	 cmdDatabase.ExecuteNonQuery();
	 sqlConnection1.Close();
	 }
}

Return to the form and click the Customer Name text box
In the Properties window, click the Events button and double-click Leave

Implement its event as follows:

private void txtCustomerName_Leave(object sender, System.EventArgs e)
{
	if( IsNewOrder == false )
	{
		UpdateCleaningOrder();
	}
}

Return to the form and click the Customer Phone text box

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtCustomerPhone_Leave(object sender, System.EventArgs e)
{
	if( IsNewOrder == false )
	{
		UpdateCleaningOrder();
	}
}

Return to the form and double-click the Date Left date time picker control

Implement its ValueChanged event as follows:

private void dtpDateLeft_ValueChanged(object sender, System.EventArgs e)
{
	DateTime dateLeft = this.dtpDateLeft.Value;
	DateTime timeLeft = this.dtpTimeLeft.Value;
	DateTime time9AM  = new DateTime(timeLeft.Year, timeLeft.Month, timeLeft.Day, 9, 0, 0);

	// If the customer leaves clothes before 9AM...
	if( timeLeft <= time9AM )
	{
		// ... then they should be ready the same day after 5PM
		this.dtpDateExpected.Value = dateLeft;
this.dtpTimeExpected.Value = new DateTime(dateLeft.Year, dateLeft.Month, dateLeft.Day, 17, 0, 0);
	}
	else
	{
	// If the clothese were left after 9AM, they will be availablethe following morning at 8AM
	this.dtpDateExpected.Value = new DateTime(dateLeft.Year, dateLeft.Month, dateLeft.Day + 1); 
	this.dtpTimeExpected.Value = new DateTime(dateLeft.Year, dateLeft.Month, dateLeft.Day + 1, 8, 0, 0);
	}
	
	if( IsNewOrder == false )
	{
		UpdateCleaningOrder();
	}
}

Return to the form and double-click the Time Left date time picker control

Implement its ValueChanged event as follows:

private void dtpTimeLeft_ValueChanged(object sender, System.EventArgs e)
{
	DateTime dateLeft = this.dtpDateLeft.Value;
	DateTime timeLeft = this.dtpTimeLeft.Value;
	DateTime time9AM  = new DateTime(timeLeft.Year, timeLeft.Month, timeLeft.Day, 9, 0, 0);

	// If the customer leaves clothes before 9AM...
	if( timeLeft <= time9AM )
		{
		// ... then they should be ready the same day after 5PM
		this.dtpDateExpected.Value = dateLeft;
this.dtpTimeExpected.Value = new DateTime(dateLeft.Year, dateLeft.Month, dateLeft.Day, 17, 0, 0);
	}
	else
	{
	// If the clothese were left after 9AM, they will be availablethe following morning at 8AM
	this.dtpDateExpected.Value = new DateTime(dateLeft.Year, dateLeft.Month, dateLeft.Day + 1); 
this.dtpTimeExpected.Value = new DateTime(dateLeft.Year, dateLeft.Month, dateLeft.Day + 1, 8, 0, 0);
	}
	
	if( IsNewOrder == false )
	{
		UpdateCleaningOrder();
	}
}

Return to the form and double-click the Date Expected date time picker control

Implement its ValueChanged event as follows:

private void dtpDateExpected_ValueChanged(object sender, System.EventArgs e)
{
	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and double-click the Time Expected date time picker control

Implement its ValueChanged event as follows:

private void dtpTimeExpected_ValueChanged(object sender, System.EventArgs e)
{
	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Unit Price text box corresponding to the Shirts

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtShirtsUnitPrice_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Qty text box corresponding to the Shirts

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtShirtsQuantity_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Unit Price text box corresponding to the Pants

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtPantsUnitPrice_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Qty text box corresponding to the Pants

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtPantsQuantity_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and double-click the first combo box under Pants

Implement its event as follows:

private void cboItem1_SelectedIndexChanged(object sender, System.EventArgs e)
{
	if( this.cboItem1.Text == "None" )
	{
		this.txtItem1UnitPrice.Text = "0.00";
		this.txtItem1Quantity.Text  = "0";
		this.txtItem1SubTotal.Text  = "0.00";
	}

	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Unit Price text box corresponding to the first combo box

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtItem1UnitPrice_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Qty text box corresponding to the first combo box

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtItem1Quantity_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and double-click the second combo box under Pants

Implement its event as follows:

private void cboItem2_SelectedIndexChanged(object sender, System.EventArgs e)
{
	if( this.cboItem2.Text == "None" )
	{
		this.txtItem2UnitPrice.Text = "0.00";
		this.txtItem2Quantity.Text  = "0";
		this.txtItem2SubTotal.Text  = "0.00";
	}

	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Unit Price text box corresponding to the second combo box

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtItem2UnitPrice_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Qty text box corresponding to the second combo box

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtItem2Quantity_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and double-click the third combo box under Pants

Implement its event as follows:

private void cboItem3_SelectedIndexChanged(object sender, System.EventArgs e)
{
	if( this.cboItem3.Text == "None" )
	{
		this.txtItem3UnitPrice.Text = "0.00";
		this.txtItem3Quantity.Text  = "0";
		this.txtItem3SubTotal.Text  = "0.00";
	}

	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Unit Price text box corresponding to the third combo box

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtItem3UnitPrice_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Qty text box corresponding to the third combo box

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtItem3Quantity_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and double-click the fourth combo box under Pants

Implement its event as follows:

private void cboItem4_SelectedIndexChanged(object sender, System.EventArgs e)
{
	if( this.cboItem4.Text == "None" )
	{
		this.txtItem4UnitPrice.Text = "0.00";
		this.txtItem4Quantity.Text  = "0";
		this.txtItem4SubTotal.Text  = "0.00";
	}

	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Unit Price text box corresponding to the fourth combo box

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtItem4UnitPrice_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Qty text box corresponding to the fourth combo box

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtItem4Quantity_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Return to the form and click the Tax Rate text box

In the Events section of the Properties window, double-click Leave and implement its event as follows:

private void txtTaxRate_Leave(object sender, System.EventArgs e)
{
	CalculateCleaningOrder();

	if( IsNewOrder == false )
		UpdateCleaningOrder();
}

Display the form and double-click the Close button

Implement its event as follows:

private void btnClose_Click(object sender, System.EventArgs e)
{
	Close();
}

Execute the application and create a few cleaning orders
Close the form
Execute the application again and try opening a cleaning order whose receipt number is 1001, then 1002, then 1003
Change some values of an order
Close the form


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