CheckedListBox.Items Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

CheckedListBox.cs

Mendapatkan koleksi item dalam .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

Nilai Properti

CheckedListBox.ObjectCollection

Koleksi CheckedListBox.ObjectCollection yang mewakili item dalam CheckedListBox.

Contoh

Contoh berikut menghitung item yang dicentang di CheckedListBox.CheckedIndexCollection untuk melihat status pemeriksaan item. Contoh menggunakan Items properti untuk mendapatkan CheckedListBox.ObjectCollection untuk mengambil indeks item menggunakan ListBox.ObjectCollection.IndexOf metode . Contohnya juga menunjukkan penggunaan CheckedIndices properti untuk mendapatkan CheckedListBox.CheckedIndexCollection, dan CheckedItems properti untuk mendapatkan CheckedListBox.CheckedItemCollection.

Perulangan pertama menggunakan GetItemCheckState metode untuk mendapatkan CheckState dari setiap item yang dicentang, mengingat indeks item. Perulangan kedua juga menggunakan GetItemCheckState, tetapi menggunakan ListBox.ObjectCollection.IndexOf metode untuk mengambil indeks untuk 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

Keterangan

Properti Items memungkinkan Anda mendapatkan referensi ke daftar item yang saat ini disimpan dalam CheckedListBox kontrol. Dengan referensi ini, Anda dapat menambahkan item, menghapus item, dan mendapatkan hitungan item dalam koleksi. Untuk informasi selengkapnya tentang tugas yang dapat dilakukan dengan koleksi item, lihat CheckedListBox.ObjectCollection topik referensi kelas.

Lihat juga

• CheckedItems
• CheckedIndices