ListView.Clear Method ()


Removes all items and columns from the control.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public void Clear()

You can use this method to remove all items and columns from the ListView control without having to call the individual Clear methods from the ListView.ColumnHeaderCollection and ListView.ListViewItemCollection classes.


The Clear method does not clear Groups specified for the ListView control. To clear Groups call ListViewGroupCollection.Clear.

The following code example demonstrates the use of Clear and ListViewItem.Selected members. To run this example, paste the following code into a form that contains a ListView named ListView1 and a button, located toward the bottom of the form, named Button1. Call the InitializeListView method from the form's constructor or Load method.

private void InitializeListView()
	// Set up the inital values for the ListView and populate it.
	this.ListView1 = new ListView();
	this.ListView1.Dock = DockStyle.Top;
	this.ListView1.Location = new System.Drawing.Point(0, 0);
	this.ListView1.Size = new System.Drawing.Size(292, 130);
	this.ListView1.View = View.Details;
	this.ListView1.FullRowSelect = true;

	string[] breakfast = new string[]{"Continental Breakfast", 
		"Pancakes and Sausage", "Denver Omelet", "Eggs & Bacon", 
		"Bagel & Cream Cheese"};

	string[] breakfastPrices = new string[]{"3.09", "4.09", 
		"4.19", "4.79", "2.09"};

	PopulateMenu("Breakfast", breakfast, breakfastPrices);

private void PopulateMenu(string meal, 
	string[] menuItems, string[] menuPrices)
	ColumnHeader columnHeader1 = new ColumnHeader();
	columnHeader1.Text = meal + " Choices";
	columnHeader1.TextAlign = HorizontalAlignment.Left;
	columnHeader1.Width = 146;

	ColumnHeader columnHeader2 = new ColumnHeader();
	columnHeader2.Text = "Price";
	columnHeader2.TextAlign = HorizontalAlignment.Center;
	columnHeader2.Width = 142;


	for(int count=0; count < menuItems.Length; count++)
		ListViewItem listItem = 
			new ListViewItem(menuItems[count]);

	// Use the Selected property to select the first item on 
	// the list.
	ListView1.Items[0].Selected = true;

private void Button1_Click(System.Object sender, System.EventArgs e)
	// Create new values for the ListView, clear the list, 
	// and repopulate it.
	string[] lunch = new string[]{"Hamburger", "Grilled Cheese",
		"Soup & Salad", "Club Sandwich", "Hotdog"};

	string[] lunchPrices = new string[]{"4.09", "5.09", "5.19", 
		"4.79", "2.09"};


	PopulateMenu("Lunch", lunch, lunchPrices);
	Button1.Enabled = false;

.NET Framework
Available since 1.1
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