获取或设置在 Tablet 屏幕上实际绘制并且可以在其中进行书写的矩形的顶部坐标。
命名空间： System.Windows.Ink
程序集： IAWinFX（在 IAWinFX.dll 中）
语法
声明
Public Property DrawnBoxTop As Double
用法
Dim instance As InkRecognizerGuide
Dim value As Double
value = instance.DrawnBoxTop
instance.DrawnBoxTop = value
public double DrawnBoxTop { get; set; }
public:
property double DrawnBoxTop {
double get ();
void set (double value);
}
/** @property */
public double get_DrawnBoxTop()
/** @property */
public void set_DrawnBoxTop(double value)
public function get DrawnBoxTop () : double
public function set DrawnBoxTop (value : double)
属性值
类型：System.Double
在 Tablet 屏幕上实际绘制并且可在其中进行书写的矩形的顶部坐标。
备注
绘制框的边界是用于指定可书写区域的可见提示。用户通常在线条的边界内书写。绘制框由 DrawnBoxTop、DrawnBoxLeft、DrawnBoxBottom 和 DrawnBoxRight 属性指定。这些属性仅供识别器使用。设置这些属性的操作本身不会在屏幕上绘制可见线条，而必须使用应用程序或控件来绘制可见线条。
另一个矩形书写框是可实际书写的不可见框。书写框大于绘制框，当用户在绘制框的线条之外绘制墨迹时，书写框可以向用户提供一个误差范围。书写框由 WritingBoxTop、WritingBoxLeft、WritingBoxBottom 和 WritingBoxRight 属性指定。
如果尝试将 DrawnBoxTop 属性设置为小于 AnalysisRegion.MinXY 或者大于 AnalysisRegion.MaxXY 的值，则该属性引发 ArgumentOutOfRangeException。
示例
下面的示例同时设置 InkRecognizerGuide 中的所有值。
Dim guideBoxTop As Double = 0
Dim guideBoxBottom As Double = 50
Dim guideBoxLeft As Double = 0
Dim guideBoxRight As Double = 600
Dim WRITINGBOXMARGIN As Integer = 10
' Find the midline of the guide box.
Dim midline As Double = (guideBoxBottom - guideBoxTop) / 2 + guideBoxTop
theGuide.Rows = 1
theGuide.Columns = 0
theGuide.Midline = midline
theGuide.WritingBoxLeft = guideBoxLeft - WRITINGBOXMARGIN
theGuide.WritingBoxTop = guideBoxTop - WRITINGBOXMARGIN
theGuide.WritingBoxRight = guideBoxRight + WRITINGBOXMARGIN
theGuide.WritingBoxBottom = guideBoxBottom + WRITINGBOXMARGIN
theGuide.DrawnBoxLeft = guideBoxLeft
theGuide.DrawnBoxTop = guideBoxTop
theGuide.DrawnBoxRight = guideBoxRight
theGuide.DrawnBoxBottom = guideBoxBottom
double guideBoxTop = 0;
double guideBoxBottom = 50;
double guideBoxLeft = 0;
double guideBoxRight = 600;
const int WRITINGBOXMARGIN = 10;
// Find the midline of the guide box.
double midline = (guideBoxBottom - guideBoxTop) / 2 + guideBoxTop;
theGuide.Rows = 1;
theGuide.Columns = 0;
theGuide.Midline = midline;
theGuide.WritingBoxLeft = guideBoxLeft - WRITINGBOXMARGIN;
theGuide.WritingBoxTop = guideBoxTop - WRITINGBOXMARGIN;
theGuide.WritingBoxRight = guideBoxRight + WRITINGBOXMARGIN;
theGuide.WritingBoxBottom = guideBoxBottom + WRITINGBOXMARGIN;
theGuide.DrawnBoxLeft = guideBoxLeft;
theGuide.DrawnBoxTop = guideBoxTop;
theGuide.DrawnBoxRight = guideBoxRight;
theGuide.DrawnBoxBottom = guideBoxBottom;
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