Pen.DashPattern 属性

定义

命名空间:
System.Drawing
程序集:
System.Drawing.Common.dll
程序集:
System.Drawing.dll
包:
System.Drawing.Common v11.0.0-preview.4.26230.115
Source:
Pen.cs
Source:
Pen.cs
Source:
Pen.cs
Source:
Pen.cs
Source:
Pen.cs
Source:
Pen.cs
Source:
Pen.cs
Source:
Pen.cs

获取或设置自定义短划线和空格的数组。

public:
 property cli::array <float> ^ DashPattern { cli::array <float> ^ get(); void set(cli::array <float> ^ value); };
public float[] DashPattern { get; set; }
member this.DashPattern : single[] with get, set
Public Property DashPattern As Single()

属性值

Single[]

一个实数数组，指定短划线和虚线中的空格的长度。

例外

ArgumentException

该 DashPattern 属性在不可变 Pen上设置，例如类返回的属性 Pens 。

示例

下面的代码示例演示设置DashCap和DashPatternSmoothingMode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，并在处理表单的事件时调用ShowPensAndSmoothingMode该方法，并作为传递方式Paint传递e。PaintEventArgs

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

分配此属性以外的null值会将此属性DashStyle的属性设置为 PenCustom。

数组中的 dashArray 元素设置短划线模式中每个短划线和空格的长度。 第一个元素设置短划线的长度，第二个元素设置空格的长度，第三个元素设置短划线的长度等。 因此，每个元素应为非零正数。

短划线模式中每个短划线和空格的长度是数组中的元素值和宽度的 Pen乘积。

适用于