Pen.DashCap 属性

定义

命名空间:

System.Drawing

程序集:

System.Drawing.Common.dll

包:

System.Drawing.Common v8.0.0

Source:

Pen.cs

获取或设置用在短划线终点的线帽样式，这些短划线构成通过此 Pen 绘制的虚线。

public:
 property System::Drawing::Drawing2D::DashCap DashCap { System::Drawing::Drawing2D::DashCap get(); void set(System::Drawing::Drawing2D::DashCap value); };

public System.Drawing.Drawing2D.DashCap DashCap { get; set; }

member this.DashCap : System.Drawing.Drawing2D.DashCap with get, set

Public Property DashCap As DashCap

属性值

DashCap

DashCap 值之一，表示用在短划线起点和终点的线帽样式，这些短划线构成通过此 Pen 绘制的虚线。

例外

InvalidEnumArgumentException

指定值不是 DashCap 的成员。

ArgumentException

对不可变的 DashCap（比如由 Pen 类所返回）设置 Pens 属性。

示例

下面的代码示例演示如何创建 以及 Pen 设置 DashCap、 DashPattern和 SmoothingMode 属性的效果。

此示例旨在与 Windows 窗体 一起使用。 将代码粘贴到窗体中， ShowPensAndSmoothingMode 并在处理窗体 Paint 的事件时调用 方法，作为 ePaintEventArgs传递。

private:
   void ShowPensAndSmoothingMode( PaintEventArgs^ e )
   {
      // Set the SmoothingMode property to smooth the line.
      e->Graphics->SmoothingMode = System::Drawing::Drawing2D::SmoothingMode::AntiAlias;

      // Create a new Pen object.
      Pen^ greenPen = gcnew Pen( Color::Green );

      // Set the width to 6.
      greenPen->Width = 6.0F;

      // Set the DashCap to round.
      greenPen->DashCap = System::Drawing::Drawing2D::DashCap::Round;

      // Create a custom dash pattern.
      array<Single>^temp0 = {4.0F,2.0F,1.0F,3.0F};
      greenPen->DashPattern = temp0;

      // Draw a line.
      e->Graphics->DrawLine( greenPen, 20.0F, 20.0F, 100.0F, 240.0F );

      // Change the SmoothingMode to none.
      e->Graphics->SmoothingMode = System::Drawing::Drawing2D::SmoothingMode::None;

      // Draw another line.
      e->Graphics->DrawLine( greenPen, 100.0F, 240.0F, 160.0F, 20.0F );

      // Dispose of the custom pen.
      delete greenPen;
   }

private void ShowPensAndSmoothingMode(PaintEventArgs e)
{

    // Set the SmoothingMode property to smooth the line.
    e.Graphics.SmoothingMode = 
        System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

    // Create a new Pen object.
    Pen greenPen = new Pen(Color.Green);

    // Set the width to 6.
    greenPen.Width = 6.0F;

    // Set the DashCap to round.
    greenPen.DashCap = System.Drawing.Drawing2D.DashCap.Round;

    // Create a custom dash pattern.
    greenPen.DashPattern = new float[]{4.0F, 2.0F, 1.0F, 3.0F};

    // Draw a line.
    e.Graphics.DrawLine(greenPen, 20.0F, 20.0F, 100.0F, 240.0F);

    // Change the SmoothingMode to none.
    e.Graphics.SmoothingMode = 
        System.Drawing.Drawing2D.SmoothingMode.None;

    // Draw another line.
    e.Graphics.DrawLine(greenPen, 100.0F, 240.0F, 160.0F, 20.0F);

    // Dispose of the custom pen.
    greenPen.Dispose();
}

Private Sub ShowPensAndSmoothingMode(ByVal e As PaintEventArgs)

    ' Set the SmoothingMode property to smooth the line.
    e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.AntiAlias

    ' Create a new Pen object.
    Dim greenPen As New Pen(Color.Green)

    ' Set the width to 6.
    greenPen.Width = 6.0F

    ' Set the DashCap to round.
    greenPen.DashCap = Drawing2D.DashCap.Round

    ' Create a custom dash pattern.
    greenPen.DashPattern = New Single() {4.0F, 2.0F, 1.0F, 3.0F}

    ' Draw a line.
    e.Graphics.DrawLine(greenPen, 20.0F, 20.0F, 100.0F, 240.0F)

    ' Change the SmoothingMode to none.
    e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.None

    ' Draw another line.
    e.Graphics.DrawLine(greenPen, 100.0F, 240.0F, 160.0F, 20.0F)

    ' Dispose of the custom pen.
    greenPen.Dispose()
End Sub

注解

如果 的属性设置为 Triangle ， Pen 则不要将 Alignment 此属性设置为 Inset。