TextRange.Contains(TextPointer) 方法
定义
重要
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检查某个位置(由 TextPointer 指定)是否位于当前所选内容中。
public:
bool Contains(System::Windows::Documents::TextPointer ^ textPointer);
public bool Contains (System.Windows.Documents.TextPointer textPointer);
member this.Contains : System.Windows.Documents.TextPointer -> bool
Public Function Contains (textPointer As TextPointer) As Boolean
参数
- textPointer
- TextPointer
要测试是否包含在当前所选内容中的位置。
返回
如果指定位置位于当前所选内容中,则为 true
;否则为 false
。
例外
textPointer 与当前所选内容不在同一文档中时发生。
示例
下面的示例演示 Contains 方法的用法。
// This method returns true if two specified selections overlap, including when the
// end of one selection serves as the beginning of the other.
bool DoSelectionsOverlap(TextRange selection1, TextRange selection2)
{
// Is either end of selection2 contained by selection1?
if (selection1.Contains(selection2.Start) || selection1.Contains(selection2.End))
{
// If so, the selections overlap.
return true;
}
// If not, selection2 may still entirely contain selection1.
// Is either end of selection1 contained by seleciotn2?
else if (selection2.Contains(selection1.Start) || selection2.Contains(selection1.End))
{
// If so, the selections overlap.
return true;
}
// If neither selection contains the begging or end of the other selection,
//the selections do not overlap.
else
{
return false;
}
}
' This method returns true if two specified selections overlap, including when the
' end of one selection serves as the beginning of the other.
Private Function DoSelectionsOverlap(ByVal selection1 As TextRange, ByVal selection2 As TextRange) As Boolean
' Is either end of selection2 contained by selection1?
If selection1.Contains(selection2.Start) OrElse selection1.Contains(selection2.End) Then
' If so, the selections overlap.
Return True
' If not, selection2 may still entirely contain selection1.
' Is either end of selection1 contained by seleciotn2?
ElseIf selection2.Contains(selection1.Start) OrElse selection2.Contains(selection1.End) Then
' If so, the selections overlap.
Return True
' If neither selection contains the begging or end of the other selection,
'the selections do not overlap.
Else
Return False
End If
End Function
注解
当前选定内容 (指示 Start 的任一末尾的位置和 End) 被视为当前选择的一部分。