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CheckedListBox.Items Property

Gets the collection of items in this CheckedListBox.

[Visual Basic]
Public Shadows ReadOnly Property Items As _
   CheckedListBox.ObjectCollection
[C#]
public new CheckedListBox.ObjectCollection Items {get;}
[C++]
public: __property CheckedListBox.ObjectCollection* get_Items();
[JScript]
public hide function get Items() : CheckedListBox.ObjectCollection;

Property Value

The CheckedListBox.ObjectCollection collection representing the items in the CheckedListBox.

Remarks

The Items property enables you to obtain a reference to the list of items that are currently stored in a CheckedListBox control. With this reference, you can add items, remove items, and obtain a count of the items in the collection. For more information on the tasks that can be performed with the item collection, see the CheckedListBox.ObjectCollection class reference topics.

Example

[Visual Basic, C#, C++] The following example enumerates the checked items in the CheckedListBox.CheckedIndexCollection to see what check state an item is in. The example uses the Items property to get the CheckedListBox.ObjectCollection to retrieve the index of an item using the ObjectCollection.IndexOf method. The example also demonstrates using the CheckedIndices property to get the CheckedListBox.CheckedIndexCollection, and the CheckedItems property to get the CheckedListBox.CheckedItemCollection.

[Visual Basic, C#, C++] The first loop uses the GetItemCheckState method to get the CheckState of each checked item, given the index of the item. The second loop also uses GetItemCheckState, but uses the ListBox.ObjectCollection.IndexOf method to retrieve the index for the item.

[Visual Basic] 
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

[C#] 
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() + ".");
    }

}

[C++] 
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.
        IEnumerator* myEnum1 = checkedListBox1->CheckedIndices->GetEnumerator();
        while (myEnum1->MoveNext()) {
            Int32 indexChecked =  *__try_cast<__box Int32*>(myEnum1->Current);

            // The indexChecked variable contains the index of the item.
            MessageBox::Show(String::Concat(S"Index#: ", __box(indexChecked), S", is checked. Checked state is: ", 
                __box(checkedListBox1->GetItemCheckState(indexChecked)), S"."));
        }

        // Next show the Object* title and check state for each item selected.
        IEnumerator* myEnum2 = checkedListBox1->CheckedItems->GetEnumerator();
        while (myEnum2->MoveNext()) {
            Object* itemChecked = __try_cast<Object*>(myEnum2->Current);

            // Use the IndexOf method to get the index of an item.
            MessageBox::Show(String::Concat(S"Item with title: \"", itemChecked, 
                S"\", is checked. Checked state is: ", 
                __box(checkedListBox1->GetItemCheckState(checkedListBox1->Items->IndexOf(itemChecked))), S"."));
        }
    }

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

CheckedListBox Class | CheckedListBox Members | System.Windows.Forms Namespace | CheckedItems | CheckedIndices

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