CheckedListBox.Items Właściwość

Definicja

Pobiera kolekcję elementów w tym elemencie CheckedListBox .Gets the collection of items in this CheckedListBox.

public:
 property System::Windows::Forms::CheckedListBox::ObjectCollection ^ Items { System::Windows::Forms::CheckedListBox::ObjectCollection ^ get(); };
public System.Windows.Forms.CheckedListBox.ObjectCollection Items { get; }
member this.Items : System.Windows.Forms.CheckedListBox.ObjectCollection
Public ReadOnly Property Items As CheckedListBox.ObjectCollection

Wartość właściwości

CheckedListBox.ObjectCollection

CheckedListBox.ObjectCollectionKolekcja reprezentująca elementy w CheckedListBox .The CheckedListBox.ObjectCollection collection representing the items in the CheckedListBox.

Przykłady

Poniższy przykład wylicza zaznaczone elementy w programie, CheckedListBox.CheckedIndexCollection Aby zobaczyć, jaki jest stan zaznaczenia elementu.The following example enumerates the checked items in the CheckedListBox.CheckedIndexCollection to see what check state an item is in. W przykładzie użyto Items właściwości, aby pobrać CheckedListBox.ObjectCollection indeks elementu przy użyciu ListBox.ObjectCollection.IndexOf metody.The example uses the Items property to get the CheckedListBox.ObjectCollection to retrieve the index of an item using the ListBox.ObjectCollection.IndexOf method. W przykładzie pokazano również CheckedIndices , jak użyć właściwości, aby pobrać CheckedListBox.CheckedIndexCollection i CheckedItems Właściwość w celu uzyskania CheckedListBox.CheckedItemCollection .The example also demonstrates using the CheckedIndices property to get the CheckedListBox.CheckedIndexCollection, and the CheckedItems property to get the CheckedListBox.CheckedItemCollection.

Pierwsza pętla używa GetItemCheckState metody, aby uzyskać CheckState każdy zaznaczony element, na podstawie indeksu elementu.The first loop uses the GetItemCheckState method to get the CheckState of each checked item, given the index of the item. Druga pętla również używa GetItemCheckState , ale używa ListBox.ObjectCollection.IndexOf metody, aby pobrać indeks dla elementu.The second loop also uses GetItemCheckState, but uses the ListBox.ObjectCollection.IndexOf method to retrieve the index for the item.

void WhatIsChecked_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   
   // Display in a message box all the items that are checked.
   // First show the index and check state of all selected items.
   IEnumerator^ myEnum1 = checkedListBox1->CheckedIndices->GetEnumerator();
   while ( myEnum1->MoveNext() )
   {
      Int32 indexChecked =  *safe_cast<Int32^>(myEnum1->Current);
      
      // The indexChecked variable contains the index of the item.
      MessageBox::Show( String::Concat( "Index#: ", indexChecked, ", is checked. Checked state is: ", checkedListBox1->GetItemCheckState( indexChecked ), "." ) );
   }

   
   // Next show the Object* title and check state for each item selected.
   IEnumerator^ myEnum2 = checkedListBox1->CheckedItems->GetEnumerator();
   while ( myEnum2->MoveNext() )
   {
      Object^ itemChecked = safe_cast<Object^>(myEnum2->Current);
      
      // Use the IndexOf method to get the index of an item.
      MessageBox::Show( String::Concat( "Item with title: \"", itemChecked, "\", is checked. Checked state is: ", checkedListBox1->GetItemCheckState( checkedListBox1->Items->IndexOf( itemChecked ) ), "." ) );
   }
}


private void WhatIsChecked_Click(object sender, System.EventArgs e) {
    // Display in a message box all the items that are checked.

    // First show the index and check state of all selected items.
    foreach(int indexChecked in checkedListBox1.CheckedIndices) {
        // The indexChecked variable contains the index of the item.
        MessageBox.Show("Index#: " + indexChecked.ToString() + ", is checked. Checked state is:" +
                        checkedListBox1.GetItemCheckState(indexChecked).ToString() + ".");
    }

    // Next show the object title and check state for each item selected.
    foreach(object itemChecked in checkedListBox1.CheckedItems) {

        // Use the IndexOf method to get the index of an item.
        MessageBox.Show("Item with title: \"" + itemChecked.ToString() +
                        "\", is checked. Checked state is: " +
                        checkedListBox1.GetItemCheckState(checkedListBox1.Items.IndexOf(itemChecked)).ToString() + ".");
    }
}
Private Sub WhatIsChecked_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles WhatIsChecked.Click
    ' Display in a message box all the items that are checked.
    Dim indexChecked As Integer
    Dim itemChecked As Object
    Const quote As String = """"

    ' First show the index and check state of all selected items.
    For Each indexChecked In CheckedListBox1.CheckedIndices
        ' The indexChecked variable contains the index of the item.
        MessageBox.Show("Index#: " + indexChecked.ToString() + ", is checked. Checked state is:" + _
                        CheckedListBox1.GetItemCheckState(indexChecked).ToString() + ".")
    Next

    ' Next show the object title and check state for each item selected.
    For Each itemChecked In CheckedListBox1.CheckedItems

        ' Use the IndexOf method to get the index of an item.
        MessageBox.Show("Item with title: " + quote + itemChecked.ToString() + quote + _
                        ", is checked. Checked state is: " + _
                        CheckedListBox1.GetItemCheckState(CheckedListBox1.Items.IndexOf(itemChecked)).ToString() + ".")
    Next

End Sub

Uwagi

ItemsWłaściwość pozwala uzyskać odwołanie do listy elementów, które są obecnie przechowywane w CheckedListBox kontrolce.The Items property enables you to obtain a reference to the list of items that are currently stored in a CheckedListBox control. Za pomocą tego odwołania można dodawać elementy, usuwać elementy i uzyskiwać liczbę elementów w kolekcji.With this reference, you can add items, remove items, and obtain a count of the items in the collection. Aby uzyskać więcej informacji na temat zadań, które można wykonać przy użyciu kolekcji elementów, zobacz CheckedListBox.ObjectCollection Tematy dotyczące klas.For more information on the tasks that can be performed with the item collection, see the CheckedListBox.ObjectCollection class reference topics.

Dotyczy

Zobacz też