RichTextBox.Selection 属性

定义

命名空间:

System.Windows.Controls

程序集:

PresentationFramework.dll

获取一个包含 RichTextBox 中当前选定内容的 TextSelection 对象。

public:
 property System::Windows::Documents::TextSelection ^ Selection { System::Windows::Documents::TextSelection ^ get(); };

public System.Windows.Documents.TextSelection Selection { get; }

member this.Selection : System.Windows.Documents.TextSelection

Public ReadOnly Property Selection As TextSelection

属性值

TextSelection

一个包含 RichTextBox 中当前选定内容的 TextSelection 对象。

默认返回的 TextSelection 的 true 属性值为 IsEmpty。 空 TextSelection 在不包含任何选定内容的文本区域中呈现为一个插入符号。

示例

下面的示例演示了此属性的使用。

// Create a simple FlowDocument to serve as the content input for the construtor.
FlowDocument flowDoc = new FlowDocument(new Paragraph(new Run("Simple FlowDocument")));
// After this constructor is called, the new RichTextBox rtb will contain flowDoc.
RichTextBox rtb = new RichTextBox(flowDoc);
// This call will select the entire contents of the RichTextBox.
rtb.SelectAll();
// This call returns the current selection (which happens to be the entire contents
// of the RichTextBox) as a TextSelection object.
TextSelection currentSelection = rtb.Selection;

' Create a simple FlowDocument to serve as the content input for the construtor.
Dim flowDoc As New FlowDocument(New Paragraph(New Run("Simple FlowDocument")))
' After this constructor is called, the new RichTextBox rtb will contain flowDoc.
Dim rtb As New RichTextBox(flowDoc)
' This call will select the entire contents of the RichTextBox.
rtb.SelectAll()
' This call returns the current selection (which happens to be the entire contents
' of the RichTextBox) as a TextSelection object.
Dim currentSelection As TextSelection = rtb.Selection

注解

使用该方法 Select 以编程方式选择内容。