CheckedListBox.CheckedIndices 属性
定义
重要
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该 CheckedListBox 中选中索引的集合。
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属性值
CheckedListBox.CheckedIndexCollection 的 CheckedListBox 集合。
- 属性
示例
以下示例枚举选中的项 CheckedListBox.CheckedIndexCollection ，以查看项处于哪个检查状态。 该示例演示如何使用 CheckedIndices 属性获取 CheckedListBox.CheckedIndexCollection，以及 CheckedItems 用于获取的属性 CheckedListBox.CheckedItemCollection。
第一个循环使用 GetItemCheckState 该方法获取 CheckState 每个已检查项（给定项的索引）。 第二个循环也使用 GetItemCheckState，但使用该 ListBox.ObjectCollection.IndexOf 方法检索项的索引。
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
注解
已检查索引的集合是控件中所有项集合中的 CheckedListBox 索引子集。 这些索引指定处于选中状态或不确定状态的项。