获取或设置中线高度。中线高度是从绘制框的基线到中线的距离。
命名空间： System.Windows.Ink
程序集： IAWinFX（在 IAWinFX.dll 中）
语法
声明
Public Property Midline As Double
用法
Dim instance As InkRecognizerGuide
Dim value As Double
value = instance.Midline
instance.Midline = value
public double Midline { get; set; }
public:
property double Midline {
double get ();
void set (double value);
}
/** @property */
public double get_Midline()
/** @property */
public void set_Midline(double value)
public function get Midline () : double
public function set Midline (value : double)
属性值
类型：System.Double
参考线的中线高度。
备注
中线是与每个字符主体顶部（不包括小写字母的主体之上的部分）平齐的假想水平线。
如果没有中线，则该值为 0。
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