ItemCollection.Clear Method
Definition
Important
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Clears the collection and releases the references on all items currently in the collection.
public:
virtual void Clear();
public void Clear ();
abstract member Clear : unit -> unit
override this.Clear : unit -> unit
Public Sub Clear ()
Implements
Exceptions
The ItemCollection is in ItemsSource mode. (When the ItemsSource property is set, the Items collection will be made read-only and fixed-size.)
Examples
The following example shows how to use this method. In the example, sbar
is a StatusBar control, which is an ItemsControl.
private void MakeProgressBar(object sender, RoutedEventArgs e)
{
sbar.Items.Clear();
TextBlock txtb = new TextBlock();
txtb.Text = "Progress of download.";
sbar.Items.Add(txtb);
ProgressBar progressbar = new ProgressBar();
progressbar.Width = 100;
progressbar.Height = 20;
Duration duration = new Duration(TimeSpan.FromSeconds(5));
DoubleAnimation doubleanimation =
new DoubleAnimation(100.0, duration);
progressbar.BeginAnimation(ProgressBar.ValueProperty,
doubleanimation);
ToolTip ttprogbar = new ToolTip();
ttprogbar.Content = "Shows the progress of a download.";
progressbar.ToolTip = (ttprogbar);
sbar.Items.Add(progressbar);
}
Private Sub MakeProgressBar(ByVal sender As Object, ByVal e As RoutedEventArgs)
sbar.Items.Clear()
Dim txtb As New TextBlock()
txtb.Text = "Progress of download."
sbar.Items.Add(txtb)
Dim progressbar As New ProgressBar()
progressbar.Width = 100
progressbar.Height = 20
Dim duration As New Duration(TimeSpan.FromSeconds(5))
Dim doubleanimation As New DoubleAnimation(100.0, duration)
progressbar.BeginAnimation(ProgressBar.ValueProperty, doubleanimation)
Dim ttprogbar As New ToolTip()
ttprogbar.Content = "Shows the progress of a download."
progressbar.ToolTip = (ttprogbar)
sbar.Items.Add(progressbar)
End Sub
Applies to
See also
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משוב
https://aka.ms/ContentUserFeedback.
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