通过

RootNode.GetTextRangeFromNodes 方法

  • 项目

在已识别字符串中查找对应于作为 RootNode 后代的 ContextNode 对象集合的文本范围。

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 RootNode
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

备注

如果 subTree 包含的某个 ContextNode 对象不是 RootNode 的后代，则引发 ArgumentException 异常。

如果 subTree 参数包含的 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

下面的示例使用来自 InkAnalyzer (theInkAnalyzer) 的 RootNode (theRootNode)，并通过选择具有最低边界的书写区域查找最后一个 WritingRegionNode。然后找到对应于此书写区域的文本范围，将 GetRecognizedString 的值放入 TextBox (theResultsTextBox)，并选择对应于最后的书写区域的文本。

Dim theRootNode As RootNode = CType(theInkAnalyzer.RootNode, RootNode)
Dim regions As ContextNodeCollection = _
    theInkAnalyzer.FindNodesOfType(Microsoft.Ink.ContextNodeType.WritingRegion)
Dim lastRegion As WritingRegionNode = Nothing
Dim maxY As Integer = Integer.MinValue
Dim aRegion As WritingRegionNode
For Each aRegion In regions
    If aRegion.Location.GetBounds().Bottom > maxY Then
        maxY = aRegion.Location.GetBounds().Bottom
        lastRegion = aRegion
    End If
Next aRegion

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

' Find corresponding start and length
Dim start, length As Integer
theRootNode.GetTextRangeFromNodes(lastRegionCollection, start, length)

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

            RootNode theRootNode = (RootNode)theInkAnalyzer.RootNode;
            ContextNodeCollection regions =
                theInkAnalyzer.FindNodesOfType(Microsoft.Ink.ContextNodeType.WritingRegion);
            WritingRegionNode lastRegion = null;
            int maxY = int.MinValue;
            foreach (WritingRegionNode region in regions)
            {
                if (region.Location.GetBounds().Bottom > maxY)
                {
                    maxY = region.Location.GetBounds().Bottom;
                    lastRegion = region;
                }
            }

            if (lastRegion == null)
                return;

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

            // Find corresponding start and length
            int start, length;
            theRootNode.GetTextRangeFromNodes(lastRegionCollection, out start, out length);

            // Select this in the text box
            theResultsTextBox.Text = theRootNode.GetRecognizedString();
            theResultsTextBox.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

RootNode 类

RootNode 成员

Microsoft.Ink 命名空间