CheckedListBox.CheckedIndices 屬性

定義

這個 CheckedListBox 中已選取索引的集合。Collection of checked indexes in this CheckedListBox.

public:
 property System::Windows::Forms::CheckedListBox::CheckedIndexCollection ^ CheckedIndices { System::Windows::Forms::CheckedListBox::CheckedIndexCollection ^ get(); };
[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.CheckedListBox.CheckedIndexCollection CheckedIndices { get; }
member this.CheckedIndices : System.Windows.Forms.CheckedListBox.CheckedIndexCollection
Public ReadOnly Property CheckedIndices As CheckedListBox.CheckedIndexCollection

屬性值

屬性

範例

下列範例會列舉 CheckedListBox.CheckedIndexCollection 中的已核取專案,以查看專案所在的檢查狀態。The following example enumerates the checked items in the CheckedListBox.CheckedIndexCollection to see what check state an item is in. 這個範例會示範如何使用 CheckedIndices 屬性來取得 CheckedListBox.CheckedIndexCollectionCheckedItems 屬性,以取得 CheckedListBox.CheckedItemCollectionThe example demonstrates using the CheckedIndices property to get the CheckedListBox.CheckedIndexCollection, and the CheckedItems property to get the CheckedListBox.CheckedItemCollection.

第一個迴圈會使用 GetItemCheckState 方法來取得每個已核取專案的 CheckState,並指定專案的索引。The first loop uses the GetItemCheckState method to get the CheckState of each checked item, given the index of the item. 第二個迴圈也會使用 GetItemCheckState,但會使用 ListBox.ObjectCollection.IndexOf 方法來抓取專案的索引。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

備註

已檢查索引的集合是索引的子集,屬於 CheckedListBox 控制項中所有專案的集合。The collection of checked indexes is a subset of the indexes into the collection of all items in the CheckedListBox control. 這些索引會指定處於已核取或不定狀態的專案。These indexes specify items in a checked or indeterminate state.

適用於

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