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Northwind Traders Order Entry

2

Northwind Traders Call Center

Add an Order Entry capability to the Northwind Traders Call Center application.

Start with the solution for Project 6 Select Customer http://www.cse.usf.edu/~turnerr/Software_Systems_Develo

pment/Downloads/Project_Solutions/ File P6_Select_Customer.zip

Expand .zip file Open solution

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Add Button to Home Form

“Enter New Order” will be enabled only when a customer is selected.

Brings up new “Order Entry” form.

btnEnterOrder

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Add Order Entry Form

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Order Entry Form

Double click on form to create Form Load event handler.

lblCurrentCustomer

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Order Entry Form

private void Order_Entry_Form_Load(object sender, EventArgs e)

{

lblCurrentCustomer.Text =

"Order for customer: " +

Program.Selected_Customer.CompanyName;

}

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Enter New Order

Add code to Home form to show Order_Entry_Form.

private void btnEnterOrder_Click(object sender, EventArgs e)

{

Order_Entry_Form f = new Order_Entry_Form ();

this.Hide();

f.ShowDialog();

this.Show();

}

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Enable Order Entry

In Home Form, enable Enter Order button if, and only if, there is a selected customer.

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Home_Form.cs

private void btnSelectCustomer_Click(object sender, EventArgs e)

{

Select_Customer_Form sc = new Select_Customer_Form();

this.Hide();

sc.ShowDialog();

this.Show();

btnEnterOrder.Enabled = Program.Customer_Selected;

if (Program.Customer_Selected)

{

Customer c = Program.Selected_Customer;

tbSelectedCustomer.Text = c.CompanyName;

}

else

{

tbSelectedCustomer.Text = "No Customer Selected";

}

}

Build and run.

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Order Entry Form

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Order Entry Form

User will specify Product Category. Product Quantity

Click Submit or Cancel

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Specifying the Product

Use a data bound Dropdown list on the Order Entry form to select Product Category.

Add and configure data source.

Data > Add New Data Source Table Categories

Display: CategoryName Value: CategoryID

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Add New Data Source

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New Data Source

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Specify Connection

Click New Connection

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Add New Connection

Click OK

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Configuring the Data Source

Click Next

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Configuring the Data Source

Click Next

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Configuring the Data Source

Click Finish

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Binding the Data Source

We have the data source.

Now add a dropdown list (ComboBox) cbCategory

Bind it to the data source.

Details on following slides.

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Add ComboBox

cbCategory

Set DataSource

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Set DisplayMember and ValueMember

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Set Connection String

Set the connection string for the new Data Source.

private void Order_Entry_Form_Load(object sender, EventArgs e)

{

this.categoriesTableAdapter.Connection.ConnectionString =

"server=scorpius.eng.usf.edu; " +

"User=" + Program.Username + "; " +

"Password=" + Program.Password;

// TODO: This line of code loads data into the 'dataSet3.Categories' // table. You can move, or remove it, as needed.

this.categoriesTableAdapter.Fill(this.dataSet3.Categories);

lblCurrentCustomer.Text =

"Order for customer: " +

Program.Selected_Customer.CompanyName;

}

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Add Event Handler

Add an event handler for Selected Index Changed in the Categories ComboBox. Double click on the ComboBox.

private void cbCategory_SelectedIndexChanged(object sender,

EventArgs e)

{

MessageBox.Show(cbCategory.SelectedValue.ToString());

}

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Program in Action

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Product Selection

Now add a Dropdown List that offers just products of the selected category. Drag ComboBox from Toolbox. Don’t copy and paste the first ComboBox.

New ComboBox: cbProducts New Data Source: Table Products

ProductID ProductName

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Product Selection

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Add Query for Products

Note productsTableAdapter Responsible for filling DataSet

Click on cbProducts to select it. Click on smart tag (upper right

corner) and select Add Query Will specify the query that will be used

by the productsTableAdapter to fill the data set that is bound to the Products ComboBox.

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Smart Tag Clicked

Click Add Query

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New Query

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Set Connection String

private void Order_Entry_Form_Load(object sender, EventArgs e)

{

// TODO: This line of code loads data into the ...

this.productsTableAdapter.Connection.ConnectionString =

"server=scorpius.eng.usf.edu; " +

"User=" + Program.Username + "; " +

"Password=" + Program.Password;

this.productsTableAdapter.Fill(this.productsDataSet.Products);

this.categoriesTableAdapter.Connection.ConnectionString =

"server=scorpius.eng.usf.edu; " +

"User=" + Program.Username + "; " +

"Password=" + Program.Password;

this.categoriesTableAdapter.Fill(this.dataSet3.Categories);

lblCurrentCustomer.Text =

"Order for customer: " +

Program.Selected_Customer.CompanyName;

}

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Update cbCategory Event Handler

private void cbCategory_SelectedIndexChanged(object sender, EventArgs e)

{

//MessageBox.Show(cbCategory.SelectedValue.ToString());

int category_id = (int)cbCategory.SelectedValue;

this.productsTableAdapter.FillByCategory(this.productsDataSet.Products,

category_id);

cbProducts.Enabled = true;

}

Whenever a new category is selected, the Products table in ProductsDataSet will be refilled using the FillByCategory query.

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Program in Action

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Clean Up the Form

We don’t need the fillByCategoryToolStrip

Right click, Delete

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Delete Event Handler

Delete event handler for fillbyCategoryToolStripButton

//private void fillByCategoryToolStripButton_Click(object sender

// EventArgs e)

//{

// try

// {

// ...

// }

// catch (System.Exception ex)

// {

// System.Windows.Forms.MessageBox.Show(ex.Message);

// }

//}

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Program in Action

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Add Event Handler

Double click on cbProduct to add an event handler.

private void cbProduct_SelectedIndexChanged(object sender,

EventArgs e)

{

MessageBox.Show(cbProducts.Text);

}

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Program in Action