CustomRecognizerNode.GetNodesFromTextRange 方法 (Int32%, Int32%)

2008-10-28

返回后代 ContextNode 对象的集合，这些对象与已识别字符串中的指定文本范围相关。

命名空间： System.Windows.Ink
程序集： IAWinFX（在 IAWinFX.dll 中）

语法

声明
Public Function GetNodesFromTextRange ( _
    ByRef start As Integer, _
    ByRef length As Integer _
) As ContextNodeCollection
用法
Dim instance As CustomRecognizerNode
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

参数

start
类型：System.Int32%
已识别字符串中文本范围的起始位置。

length
类型：System.Int32%
已识别字符串中文本范围的长度。

返回值

类型：System.Windows.Ink.ContextNodeCollection
返回后代 ContextNode 对象的集合，这些对象与已识别字符串中的指定文本范围相关。

备注

指定的文本范围应相对于此 CustomRecognizerNode 的已识别字符串，而不相对于整个 RootNode 的已识别字符串。

示例

下面的示例使用名为 selectedResultsTextBox 的 TextBox。在此之前，Text 属性已设置为 CustomRecognizerNode 对象 customRecognizer 的 GetRecognizedString 所返回的值。用户已选中了 TextBox 中的一些文本。如果 InkRecognitionConfidence 级别为 Strong()，则与用户的选定内容对应的 Strokes 突出显示为红色。

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

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

' Only highlight if strong recognition
If customRecognizer.InkRecognitionConfidence = _
   InkRecognitionConfidence.Strong Then

    Dim selectedNodes As ContextNodeCollection = _
        customRecognizer.GetNodesFromTextRange(start, length)

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

    ' Color the strokes red if part of the selected words.
    ' Otherwise, color them black.
    For Each Stroke As Stroke In customRecognizer.Strokes
        Stroke.DrawingAttributes.Color = Colors.Black
    Next Stroke

    For Each selectedNode As ContextNode In selectedNodes
        For Each Stroke As Stroke In selectedNode.Strokes
            Stroke.DrawingAttributes.Color = Colors.Red
        Next Stroke
    Next selectedNode
End If

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

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

// Only highlight if strong recognition
if (customRecognizer.InkRecognitionConfidence == InkRecognitionConfidence.Strong)
{
    ContextNodeCollection selectedNodes =
        customRecognizer.GetNodesFromTextRange(ref start, ref length);

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

    // Color the strokes red if part of the selected words.
    // Otherwise, color them black.
    foreach (Stroke stroke in customRecognizer.Strokes)
    {
        stroke.DrawingAttributes.Color = Colors.Black;
    }
    foreach (ContextNode selectedNode in selectedNodes)
    {
        foreach (Stroke stroke in selectedNode.Strokes)
        {
            stroke.DrawingAttributes.Color = Colors.Red;
        }
    }
}