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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.

NoteNote:

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 containing 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;

		this.ListView1.Columns.Add(columnHeader1);
		this.ListView1.Columns.Add(columnHeader2);

		for(int count=0; count < menuItems.Length; count++)
		{
			ListViewItem listItem = 
				new ListViewItem(menuItems[count]);
			listItem.SubItems.Add(menuPrices[count]);
			ListView1.Items.Add(listItem);
		}

		// Use the Selected property to select the first item on  
		// the list.
		ListView1.Focus();
		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"};

		ListView1.Clear();

		PopulateMenu("Lunch", lunch, lunchPrices);
		Button1.Enabled = false;
	}
and ListViewItem.Items.Selected members. To run the sample place the following code in a form
containing 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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0
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