CheckedListBox.CheckedIndices 屬性
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
這個 CheckedListBox 中已選取索引的集合。
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; }[<System.ComponentModel.Browsable(false)>]
member this.CheckedIndices : System.Windows.Forms.CheckedListBox.CheckedIndexCollectionPublic ReadOnly Property CheckedIndices As CheckedListBox.CheckedIndexCollection屬性值
CheckedListBox.CheckedIndexCollection 的 CheckedListBox 集合。
- 屬性
範例
下列範例會列舉 中的 CheckedListBox.CheckedIndexCollection 已核取專案，以查看專案所在的檢查狀態。 此範例示範如何使用 CheckedIndices 屬性來取得 CheckedListBox.CheckedIndexCollection ，以及 CheckedItems 取得 CheckedListBox.CheckedItemCollection 的 屬性。
第一個迴圈會 GetItemCheckState 使用 方法來取得 CheckState 每個已檢查項目的 ，並指定專案的索引。 第二個迴圈也會使用 GetItemCheckState ，但會使用 ListBox.ObjectCollection.IndexOf 方法來擷取專案的索引。
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
核取索引的集合是 控制項中所有專案的集合中 CheckedListBox 索引的子集。 這些索引會指定處於已核取或不確定狀態的專案。