WritingRegionNode.GetTextRangeFromNodes 方法

对于给定的 ContextNode 对象集合，此方法查找已识别字符串中相应的文本范围。

命名空间：  Microsoft.Ink
程序集：  Microsoft.Ink.Analysis（在 Microsoft.Ink.Analysis.dll 中）

语法

声明
Public Sub GetTextRangeFromNodes ( _
    subTree As ContextNodeCollection, _
    <OutAttribute> ByRef start As Integer, _
    <OutAttribute> ByRef length As Integer _
)
用法
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
)

参数

• subTree
  类型：Microsoft.Ink.ContextNodeCollection
  ContextNode 对象的集合，这些对象是 WritingRegionNode 的后代。

• start
  类型：System.Int32%
  文本范围的起点。

• length
  类型：System.Int32%
  文本范围的长度。

备注

如果 subTree 包含的某个 ContextNode 不是 WritingRegionNode 的后代，则引发 ArgumentException。

如果 subTree 包含的 ContextNode 对象不连续，则返回涵盖所有 ContextNode 对象的最小文本范围。

示例

下面的示例查找 WritingRegionNode (writingRegion) 中的最后一段。然后找到对应于此段落的文本范围，并将 GetRecognizedString 的值放入一个 TextBox (selectedResultsTextBox)，然后选中对应于最后一段的文本。

Dim paragraphs As ContextNodeCollection = theInkAnalyzer.FindNodesOfType(Microsoft.Ink.ContextNodeType.Paragraph)
Dim lastParagraph As ParagraphNode = Nothing
Dim maxY As Integer = Integer.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(Microsoft.Ink.ContextNodeType.Paragraph);
                ParagraphNode lastParagraph = null;
                int maxY = int.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 并不是对每个平台的所有版本都提供支持。有关支持的版本的列表，请参见.NET Framework 系统要求。

版本信息

.NET Framework

受以下版本支持：3.0

另请参见

参考

WritingRegionNode 类

WritingRegionNode 成员

Microsoft.Ink 命名空间