RootNode.GetNodesFromTextRange 方法 (Int32%, Int32%)

傳回子代 ContextNode 物件集合，這些物件都與已辨識字串中指定的文字範圍相關聯。

命名空間：  Microsoft.Ink
組件：  Microsoft.Ink.Analysis (在 Microsoft.Ink.Analysis.dll 中)

語法

'宣告
Public Function GetNodesFromTextRange ( _
    ByRef start As Integer, _
    ByRef length As Integer _
) As ContextNodeCollection
'用途
Dim instance As RootNode
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

參數

• start
  型別：System.Int32%
  已辨識字串中文字範圍的起點。

• length
  型別：System.Int32%
  已辨識字串中文字範圍的長度。

傳回值

型別：Microsoft.Ink.ContextNodeCollection
子代 ContextNode 物件集合，這些物件都與已辨識字串中指定的文字範圍相關聯。

備註

start 和 length 參數都是參考，因為它們的值可以變更。例如，GetRecognizedString 的傳回值為 "I am late"，而且您傳入 start = 6 和 length = 1 兩個值，表示對應於 "a" 這個字母。然後 ContextNodeCollection 可能只有一個 ContextNode，這是對應於 "late" 一字的 InkWordNode。在此情況下，start 的值會變更為 5，而且 length 的值會變更為 4，表示對應於 "late" 這一整個字。

範例

下列範例會取得 TextBox (英文) (theResultsTextBox)，它的 Text (英文) 屬性先前已設定為 InkAnalyzer (theInkAnalyzer) 之 RootNode 的 GetRecognizedString 所傳回的值。使用者已選取 TextBox (英文) 中的部分文字，而且範例程式碼會採用該選取範圍，並且將與其對應的 Strokes 加上標記。

Dim theRootNode As RootNode = DirectCast(theInkAnalyzer.RootNode, RootNode)
' Find out what's been selected in the text box
Dim selStart As Integer = theResultsTextBox.SelectionStart
Dim selLength As Integer = theResultsTextBox.SelectionLength

' Return if no text is selected.
' selLength must be > 0 or GetNodesFromTextRange(...) 
' will throw an ArgumentOutOfRangeException
If 0 = selLength Then
    Return
End If

' Get the nodes that correspond to that range
Dim selectedSubNodes As ContextNodeCollection = theRootNode.GetNodesFromTextRange(selStart, selLength)

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

' First, set all strokes to black
Dim inkStroke As Stroke
For Each inkStroke In theRootNode.Strokes
    inkStroke.DrawingAttributes = New DrawingAttributes(Color.Black)
Next inkStroke
' Next, set all selected sub nodes to red
Dim node As ContextNode
For Each node In selectedSubNodes
    For Each inkStroke In node.Strokes
        inkStroke.DrawingAttributes = New DrawingAttributes(Color.Red)
    Next inkStroke
Next node

            RootNode theRootNode = (RootNode)theInkAnalyzer.RootNode;
            // Find out what's been selected in the text box
            int selStart = theResultsTextBox.SelectionStart;
            int selLength = theResultsTextBox.SelectionLength;


            // Return if no text is selected.
            // selLength must be > 0 or GetNodesFromTextRange(...) 
            // will throw an ArgumentOutOfRangeException
            if (0 == selLength)
            {
                return;
            }

            // Get the nodes that correspond to that range
            ContextNodeCollection selectedSubNodes =
                    theRootNode.GetNodesFromTextRange(ref selStart, ref selLength);


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

            // First, set all strokes to black
            foreach (Stroke stroke in theRootNode.Strokes)
                stroke.DrawingAttributes =
                            new DrawingAttributes(Color.Black);
            // Next, set all selected sub nodes to red
            foreach (ContextNode node in selectedSubNodes)
            {
                foreach (Stroke stroke in node.Strokes)
                {
                    stroke.DrawingAttributes =
                            new DrawingAttributes(Color.Red);
                }
            }

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

RootNode 類別

RootNode 成員

GetNodesFromTextRange 多載

Microsoft.Ink 命名空間