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。
适用于
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