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WritingRegionNode.GetTextRangeFromNodes 方法

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若指定 ContextNode 物件的集合，這個方法便會在已辨識字串中尋找對應的文字範圍。

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

語法

'宣告
Public Sub GetTextRangeFromNodes ( _
    subTree As ContextNodeCollection, _
    <OutAttribute> ByRef start As Integer, _
    <OutAttribute> ByRef length As Integer _
)
'用途
Dim instance As WritingRegionNode
Dim subTree As ContextNodeCollection
Dim start As Integer
Dim length As Integer

instance.GetTextRangeFromNodes(subTree, _
    start, length)

public void GetTextRangeFromNodes(
    ContextNodeCollection subTree,
    out int start,
    out int length
)

public:
void GetTextRangeFromNodes(
    ContextNodeCollection^ subTree, 
    [OutAttribute] int% start, 
    [OutAttribute] int% length
)

public void GetTextRangeFromNodes(
    ContextNodeCollection subTree,
    /** @attribute OutAttribute */ /** @ref */int start,
    /** @attribute OutAttribute */ /** @ref */int length
)

public function GetTextRangeFromNodes(
    subTree : ContextNodeCollection, 
    start : int, 
    length : int
)

參數

備註

如果 subTree 包含不是 InkWritingNode 之子代的 ContextNode，會擲回 ArgumentException。

如果 subTree 包含不連續的 ContextNode 物件，則會傳回涵蓋所有 ContextNode 物件的最小文字範圍。

範例

下列範例會在名為 writingRegion 的 WritingRegionNode 中尋找最後一個段落。接著會尋找對應於這個段落的文字範圍，將 GetRecognizedString 的值放入名為 selectedResultsTextBox 的 TextBox 中，然後選取對應於最後一個段落的文字。

Dim paragraphs As ContextNodeCollection = theInkAnalyzer.FindNodesOfType(ContextNodeType.Paragraph)
Dim lastParagraph As ParagraphNode = Nothing
Dim maxY As Double = Double.MinValue
Dim paragraph As ParagraphNode
For Each paragraph In  paragraphs
    If paragraph.Location.GetBounds().Bottom > maxY Then
        maxY = paragraph.Location.GetBounds().Bottom
        lastParagraph = paragraph
    End If
Next paragraph

If lastParagraph Is Nothing Then
    Return
End If 
' Create a collection to hold this line
Dim lastParagraphCollection As New ContextNodeCollection(theInkAnalyzer)
lastParagraphCollection.Add(lastParagraph)

' Find corresponding start and length
Dim start, length As Integer
writingRegion.GetTextRangeFromNodes(lastParagraphCollection, start, length)

' Select this in the text box
selectedResultsTextBox.Text = writingRegion.GetRecognizedString()
selectedResultsTextBox.Select(start, length)

ContextNodeCollection paragraphs =
     theInkAnalyzer.FindNodesOfType(ContextNodeType.Paragraph);
ParagraphNode lastParagraph = null;
double maxY = double.MinValue;
foreach (ParagraphNode paragraph in paragraphs)
{
    if (paragraph.Location.GetBounds().Bottom > maxY)
    {
        maxY = paragraph.Location.GetBounds().Bottom;
        lastParagraph = paragraph;
    }
}

if (lastParagraph == null)
    return;

// Create a collection to hold this line
ContextNodeCollection lastParagraphCollection = new ContextNodeCollection(theInkAnalyzer);
lastParagraphCollection.Add(lastParagraph);

// Find corresponding start and length
int start, length;
writingRegion.GetTextRangeFromNodes(lastParagraphCollection, out start, out length);

// Select this in the text box
selectedResultsTextBox.Text = writingRegion.GetRecognizedString();
selectedResultsTextBox.Select(start, length);

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

WritingRegionNode 類別

WritingRegionNode 成員

System.Windows.Ink 命名空間