- Investigating Unsupported Controls in the .NET Compact Framework
- Investigating Unsupported System.Windows.Forms Functionality in the .NET Compact Framework
- Working with the Visual Studio .NET Form Designer
- Understanding the Different Windows Forms Target Platforms
- Working with the Form Control
- Programming the Button Control
- Using the TextBox Control
- Using the Label Control
- Working with RadioButton Controls
- Using the CheckBox Control
- Using the ComboBox Control
- Using the ListBox Control
- Using the NumericUpDown Control
- Using the DomainUpDown Control
- Programming the ProgressBar Control
- Using the StatusBar Control
- Using the TrackBar Control
- Using the ToolBar Control
- Adding Menus with the MainMenu Control
- Using a ContextMenu Control in an Application
- Using the Timer Control
- Using the OpenFileDialog and SaveFileDialog Controls
- Using the Panel Control
- Using the HScrollBar and VScrollBar Controls
- Using the ImageList Control
- Using the PictureBox Control
- Using the ListView Control
- Using the TabControl Control
- Using the TreeView Control
- Working with the DataGrid Control
- In Brief
This chapter is from the book
This chapter is from the book
This chapter is from the book
Using the ListBox Control
The ComboBox is ideal for applications in space-constrained environments, but the ListBox should be used if you have enough screen space to display several options to the user at once.
The ComboBox and ListBox share almost the same exact set of properties and methods. This includes the Items collection property and the Add, Remove, and Clear methods on the Items property. For example, the following code adds strings to a ListBox control at runtime. This code is nearly identical to the code used to add string to a ComboBox control.
C#
listBox1.Items.Add("Hi");
listBox1.Items.Add("Howdy");
listBox1.Items.Add("Wuz Up");
VB
listBox1.Items.Add("Hi")
listBox1.Items.Add("Howdy")
listBox1.Items.Add("Wuz Up")
You can also add items to the ListBox control at runtime by binding the ListBox to a collection. The process of binding a ListBox control is identical to binding a ComboBox control. First, set the DataSource to the collection. Then, set the DisplayMember to the source item property that will be used as the display string. The following code is another version of the LoadCustomers method from the "Using the ComboBox Control" section. Instead of binding to a ComboBox, a list of Customer objects is bound to a ListBox.
C#
private void LoadCustomers() {
if(customers != null)
return;
customers = new Customer[6];
customers[0] = new Customer("Ronnie", "Donnell", "Yates");
customers[1] = new Customer("Moya", "Alicia", "Hines");
customers[2] = new Customer("Veronica", "Christine", "Yates");
customers[3] = new Customer("Diane", "", "Taylor");
customers[4] = new Customer("Kindell", "Elisha", "Yates");
customers[5] = new Customer("Zion", "Donnell", "Yates");
this.listBox1.DataSource = customers;
this.listBox1.DisplayMember = "FullName";
}
VB
Dim customers(6) As Customer
customers(0) = New Customer("Ronnie", "Donnell", "Yates")
customers(1) = New Customer("Moya", "Alicia", "Hines")
customers(2) = New Customer("Veronica", "Christine", "Yates")
customers(3) = New Customer("Diane", "", "Taylor")
customers(4) = New Customer("Kindell", "Elisha", "Yates")
customers(5) = New Customer("Zion", "Donnell", "Yates")
ListBox1.DataSource = customers
ListBox1.DisplayMember = "FullName"
The ListBox also exposes the SelectedIndex and SelectedItem properties. These properties provide access to the currently selected item in the ListBox control. These properties are used exactly as they are with the ComboBox control.