ContextNodeType 类

定义用于指定 ContextNode 对象的类型的值。

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

语法

声明
Public NotInheritable Class ContextNodeType
用法
Dim instance As ContextNodeType

public sealed class ContextNodeType

public ref class ContextNodeType sealed

public final class ContextNodeType

public final class ContextNodeType

备注

ContextNode.Type 属性和 InkAnalyzer.FindNodesOfType 方法经常使用此类的字段。

示例

此示例设置 TextBox 对象 selectedResultsTextBox 的 Text 属性，以显示 ContextNode 对象 selectedNode 的合适字符串。它使用 Type 属性来选择要显示的文本种类，具体取决于 ContextNode 的类型。

Select Case selectedNode.Type
    Case Microsoft.Ink.ContextNodeType.WritingRegion
        Dim writingRegion As WritingRegionNode = _
            CType(selectedNode, WritingRegionNode)
        selectedResultsTextBox.Text = writingRegion.GetRecognizedString()
    Case Microsoft.Ink.ContextNodeType.Paragraph
        Dim paragraph As ParagraphNode = _
            CType(selectedNode, ParagraphNode)
        selectedResultsTextBox.Text = paragraph.GetRecognizedString()
    Case Microsoft.Ink.ContextNodeType.Line
        Dim line As LineNode = _
            CType(selectedNode, LineNode)
        selectedResultsTextBox.Text = line.GetRecognizedString()
    Case Microsoft.Ink.ContextNodeType.InkWord
        Dim inkWord As InkWordNode = _
            CType(selectedNode, InkWordNode)
        Dim parentNode As ContextNode = inkWord.ParentNode
        If TypeOf parentNode Is LineNode Then
            Dim parentLine As LineNode = CType(parentNode, LineNode)
            ' Put parent line's recognized string into the text box
            selectedResultsTextBox.Text = parentLine.GetRecognizedString()

            ' Select the text that corresponds to the ink word
            Dim subNodes As New ContextNodeCollection(theInkAnalyzer)
            subNodes.Add(inkWord)
            Dim start As Integer
            Dim length As Integer
            parentLine.GetTextRangeFromNodes(subNodes, start, length)
            If start >= 0 AndAlso length > 0 Then
                selectedResultsTextBox.Select(start, length)
            End If
        End If
        ' Show the time stamp
        If inkWord.ContainsPropertyData(Me.timeStampGuid) Then
            Dim timeStamp As DateTime = _
                CType(inkWord.GetPropertyData(Me.timeStampGuid), DateTime)
            timeStampLabel.Text = timeStamp.ToShortTimeString()
        End If

        ' Snippet to demonstrate GetPropertyDataIds
        Dim propertyDataIds() As Guid = inkWord.GetPropertyDataIds()

        ' Snippets to demonstrate loading and saving
        Dim data As Byte() = inkWord.SavePropertiesData()
        If (Not inkWord.LoadPropertiesData(data)) Then
            MessageBox.Show("Cannot load property data")
        End If
    Case Microsoft.Ink.ContextNodeType.InkDrawing
        Dim drawingNode As InkDrawingNode = CType(selectedNode, InkDrawingNode)
        selectedResultsTextBox.Text = drawingNode.GetShapeName()
    Case Microsoft.Ink.ContextNodeType.InkBullet
        Dim bulletNode As InkBulletNode = CType(selectedNode, InkBulletNode)
        selectedResultsTextBox.Text = bulletNode.GetRecognizedString()
    Case Microsoft.Ink.ContextNodeType.Object
        Dim selectedObject As ObjectNode = selectedNode
        selectedResultsTextBox.Text = selectedObject.GetRecognizedString()
    Case Microsoft.Ink.ContextNodeType.CustomRecognizer
        Dim customRecognizer As CustomRecognizerNode = selectedNode
        selectedResultsTextBox.Text = customRecognizer.GetRecognizedString()
    Case Else
        selectedResultsTextBox.Text = String.Empty
End Select

                if (selectedNode.Type == Microsoft.Ink.ContextNodeType.WritingRegion)
                {
                    WritingRegionNode writingRegion = (WritingRegionNode)selectedNode;
                    selectedResultsTextBox.Text = writingRegion.GetRecognizedString();
                }
                else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.Paragraph)
                {
                    ParagraphNode paragraph = (ParagraphNode)selectedNode;
                    selectedResultsTextBox.Text = paragraph.GetRecognizedString();
                }
                else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.Line)
                {
                    LineNode line = (LineNode)selectedNode;
                    selectedResultsTextBox.Text = line.GetRecognizedString();
                }
                else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.InkWord)
                {
                    InkWordNode inkWord = (InkWordNode)selectedNode;
                    ContextNode parentNode = inkWord.ParentNode;
                    if (parentNode is LineNode)
                    {
                        LineNode parentLine = (LineNode)parentNode;
                        // Put parent line's recognized string into the text box
                        selectedResultsTextBox.Text = parentLine.GetRecognizedString();

                        // Select the text that corresponds to the ink word
                        ContextNodeCollection subNodes = new ContextNodeCollection(theInkAnalyzer);
                        subNodes.Add(inkWord);
                        int start = 0;
                        int length = 0;
                        parentLine.GetTextRangeFromNodes(subNodes, out start, out length);
                        if (start >= 0 && length > 0)
                        {
                            selectedResultsTextBox.Select(start, length);
                        }
                    }
                }
                else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.InkDrawing)
                {
                    InkDrawingNode drawingNode = (InkDrawingNode)selectedNode;
                    selectedResultsTextBox.Text = drawingNode.GetShapeName();
                }
                else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.InkBullet)
                {
                    InkBulletNode bulletNode = (InkBulletNode)selectedNode;
                    selectedResultsTextBox.Text = bulletNode.GetRecognizedString();
                }
                else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.CustomRecognizer)
                {
                    CustomRecognizerNode customRecognizer = (CustomRecognizerNode)selectedNode;
                    selectedResultsTextBox.Text = customRecognizer.GetRecognizedString();
                }
                else if (selectedNode.Type == Microsoft.Ink.ContextNodeType.Object)
                {
                    ObjectNode selectedObject = (ObjectNode)selectedNode;
                    selectedResultsTextBox.Text = selectedObject.GetRecognizedString();
                }
                else
                {
                    selectedResultsTextBox.Text = String.Empty;
                }

继承层次结构

System.Object
  Microsoft.Ink.ContextNodeType

线程安全

此类型的任何公共 static（在 Visual Basic 中为 Shared） 成员都是线程安全的。但不保证所有实例成员都是线程安全的。

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

ContextNodeType 成员

Microsoft.Ink 命名空间

ContextNode.Type

InkAnalyzer.FindNodesOfType