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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：  System.Windows.Ink
組件：  IAWinFX (在 IAWinFX.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

傳回值

型別：System.Windows.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 參數都是可變更的參考值，用以指定與所傳回 ContextNodeCollection 相關聯的整個字串。例如，GetRecognizedString 的傳回值為 "I am late"，而且您傳入 start = 6 和 length = 1 兩個值，表示這些參數對應於 "a" 這個字母。因此，ContextNodeCollection 可能只包含一個 ContextNode，也就是對應於 "late" 一字的 InkWordNode。在這個範例中，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

下列程式碼範例會使用 GetNodesFromTextRange 方法，標示對應於選定文字的筆劃。範例程式碼會假設名為 theResultsTextBox 的 TextBox 之 Text 屬性設定為 GetRecognizedString 方法所傳回的值，而且使用者已從 theResultsTextBox 中選取一些文字。這個範例也會假設有名為 theInkAnalyzer 的 InkAnalyzer。

Dim theRootNode As RootNode = CType(theInkAnalyzer.RootNode, RootNode)

' First, set all strokes to black
For Each stroke As Stroke In theRootNode.Strokes
    stroke.DrawingAttributes.Color = Colors.Black
Next stroke

' Find out what's been selected in the text box
Dim selStart As Integer = theResultsTextBox.SelectionStart
Dim selLength As Integer = theResultsTextBox.SelectionLength

' Do nothing if no text is selected.
If selLength = 0 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

' Next, set all selected sub nodes to red
Dim node As ContextNode
For Each node In  selectedSubNodes
    Dim stroke As Stroke
    For Each stroke In  node.Strokes
        stroke.DrawingAttributes.Color = Colors.Red
    Next stroke
Next node

RootNode theRootNode = (RootNode)theInkAnalyzer.RootNode;

// First, set all strokes to black
foreach (Stroke stroke in theRootNode.Strokes)
    stroke.DrawingAttributes.Color = Colors.Black;

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

// Do nothing if no text is selected.
if (selLength == 0)
{
    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;

// Next, set all selected sub nodes to red
foreach (ContextNode node in selectedSubNodes)
{
    foreach (Stroke stroke in node.Strokes)
    {
        stroke.DrawingAttributes.Color = Colors.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

System.Windows.Ink 命名空間

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