ListItemCollection.Clear Method

Removes all ListItem objects from the collection.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

public:
virtual void Clear () sealed
public final void Clear ()
public final function Clear ()
Not applicable.

Use the Clear method to remove all ListItem objects. The Count property is also set to 0.

Caution noteCaution:

When you use this method, all ListItem objects are removed from the collection. You cannot undo this.

No code example is currently available or this language may not be supported.
// Copy the items in the ListItemCollection to an array before 
// deleting them.     
ListItem myListItemArray[] = new ListItem[ListBox1.get_Items().
    get_Count()];
ListBox1.get_Items().CopyTo(myListItemArray, 0);

// Delete all the items from the ListBox.
ListBox1.get_Items().Clear();
DeleteLabel.set_Text("<b>All items in the ListBox were " 
    + "deleted successfully." 
    + "</b><br /><b>The deleted items are:");
String listResults="";
System.Collections.IEnumerator myEnum = myListItemArray.
    GetEnumerator();
while(myEnum.MoveNext()) {
    ListItem myItem = (ListItem)myEnum.get_Current();
    listResults = listResults + myItem.get_Text() + "<br />";
}
ResultsLabel.set_Text(listResults);

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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