ParagraphNode.GetNodesFromTextRange 方法 (Int32%, Int32%)

傳回 ContextNodeCollection，其中包含與已辨識字串中指定之文字範圍相關聯的子代 ContextNode 物件。

命名空間：  System.Windows.Ink
組件：  IAWinFX (在 IAWinFX.dll 中)

語法

'宣告
Public Function GetNodesFromTextRange ( _
    ByRef start As Integer, _
    ByRef length As Integer _
) As ContextNodeCollection
'用途
Dim instance As ParagraphNode
Dim start As Integer
Dim length As Integer
Dim returnValue As ContextNodeCollection

returnValue = instance.GetNodesFromTextRange(start, _
    length)

public ContextNodeCollection GetNodesFromTextRange(
    ref int start,
    ref int length
)

public:
ContextNodeCollection^ GetNodesFromTextRange(
    int% start, 
    int% length
)

public ContextNodeCollection GetNodesFromTextRange(
    /** @ref */int start,
    /** @ref */int length
)

public function GetNodesFromTextRange(
    start : int, 
    length : int
) : ContextNodeCollection

參數

• start
  型別：System.Int32%
  已辨識字串中文字範圍的起點。

• length
  型別：System.Int32%
  已辨識字串中文字範圍的長度。

傳回值

型別：System.Windows.Ink.ContextNodeCollection
ContextNodeCollection ，其中包含與已辨識字串中指定之文字範圍相關聯的子代 ContextNode 物件。

備註

指定的文字範圍應該與目前 ParagraphNode 的已辨識字串相關，而不是整個 RootNode 的已辨識字串。

範例

下列範例會採用 TextBox (selectedResultsTextBox)，它的 Text 屬性先前已設定為 ParagraphNode (paragraph) 之 GetRecognizedString 所傳回的值。使用者已選取 TextBox 中的部分文字。這個範例程式碼會採用該選取範圍，並且將與其對應的 Strokes 加上標記。

' Find out what's been selected in the text box
Dim selStart As Integer = selectedResultsTextBox.SelectionStart
Dim selLength As Integer = selectedResultsTextBox.SelectionLength

' Return if no text is selected.
If selLength = 0 Then
    Return
End If

' Get the nodes that correspond to that range
Dim selectedSubNodes As ContextNodeCollection = _
    paragraph.GetNodesFromTextRange(selStart, selLength)

' Use the new start and length value to update the
' selection in the TextBox
selectedResultsTextBox.SelectionStart = selStart
selectedResultsTextBox.SelectionLength = selLength

' First, set all strokes to black
For Each Stroke As Stroke In paragraph.Strokes
    Stroke.DrawingAttributes.Color = Colors.Black
Next Stroke

' Next, set all selected sub nodes to red
For Each node As ContextNode In selectedSubNodes
    Dim stroke As Stroke
    For Each stroke In node.Strokes
        stroke.DrawingAttributes.Color = Colors.Red
    Next stroke
Next node

// Find out what's been selected in the text box
int selStart = selectedResultsTextBox.SelectionStart;
int selLength = selectedResultsTextBox.SelectionLength;

// Return if no text is selected.
if (selLength == 0)
    return;

// Get the nodes that correspond to that range
ContextNodeCollection selectedSubNodes =
        paragraph.GetNodesFromTextRange(ref selStart, ref selLength);


// Use the new start and length value to update the
// selection in the TextBox
selectedResultsTextBox.SelectionStart = selStart;
selectedResultsTextBox.SelectionLength = selLength;

// First, set all strokes to black
foreach (Stroke stroke in paragraph.Strokes)
    stroke.DrawingAttributes.Color = Colors.Black;

// Next, set all selected sub nodes to red
foreach (ContextNode node in selectedSubNodes)
{
    foreach (Stroke stroke in node.Strokes)
    {
        stroke.DrawingAttributes.Color = Colors.Red;
    }
}

平台

Windows Vista

.NET Framework 和 .NET Compact Framework 並不支援各種平台的所有版本。如需支援平台版本的相關資訊，請參閱 .NET Framework 系統需求。

版本資訊

.NET Framework

支援版本：3.0

請參閱

參考

ParagraphNode 類別

ParagraphNode 成員

GetNodesFromTextRange 多載

System.Windows.Ink 命名空間