KnownColor 枚举

定义

public enum class KnownColor

public enum KnownColor

type KnownColor = 

Public Enum KnownColor

继承

Object

ValueType

Enum

KnownColor

字段

示例

下面的代码示例演示如何使用 KnownColor 枚举打印出其所有值的名称和颜色。 此示例旨在与 Windows 窗体 一起使用。 Create窗体并将以下代码粘贴到其中。 DisplayKnownColors在窗体的事件Paint处理方法中调用 方法，作为 ePaintEventArgs传递。

private:
   void DisplayKnownColors( PaintEventArgs^ e )
   {
      this->Size = System::Drawing::Size( 650, 550 );

      // Get all the values from the KnownColor enumeration.
      System::Array^ colorsArray = Enum::GetValues( KnownColor::typeid );
      array<KnownColor>^allColors = gcnew array<KnownColor>(colorsArray->Length);
      Array::Copy( colorsArray, allColors, colorsArray->Length );

      // Loop through printing out the values' names in the colors 
      // they represent.
      float y = 0;
      float x = 10.0F;
      for ( int i = 0; i < allColors->Length; i++ )
      {
         // If x is a multiple of 30, start a new column.
         if ( i > 0 && i % 30 == 0 )
         {
            x += 105.0F;
            y = 15.0F;
         }
         else
         {
            // Otherwise, increment y by 15.
            y += 15.0F;
         }

         // Create a custom brush from the color and use it to draw
         // the brush's name.
         SolidBrush^ aBrush = gcnew SolidBrush( Color::FromName( allColors[ i ].ToString() ) );
         e->Graphics->DrawString( allColors[ i ].ToString(), this->Font, aBrush, x, y );

         // Dispose of the custom brush.
         delete aBrush;
      }
   }

private void DisplayKnownColors(PaintEventArgs e)
{
    this.Size = new Size(650, 550);
    
    // Get all the values from the KnownColor enumeration.
    System.Array colorsArray = Enum.GetValues(typeof(KnownColor));
    KnownColor[] allColors = new KnownColor[colorsArray.Length];

    Array.Copy(colorsArray, allColors, colorsArray.Length);

    // Loop through printing out the values' names in the colors 
    // they represent.
    float y = 0;
    float x = 10.0F;

    for(int i = 0; i < allColors.Length; i++)
    {

        // If x is a multiple of 30, start a new column.
        if (i > 0 && i % 30 == 0)
        {
            x += 105.0F;
            y = 15.0F;
        }
        else
        {
            // Otherwise, increment y by 15.
            y += 15.0F;
        }

        // Create a custom brush from the color and use it to draw
        // the brush's name.
        SolidBrush aBrush = 
            new SolidBrush(Color.FromName(allColors[i].ToString()));
        e.Graphics.DrawString(allColors[i].ToString(), 
            this.Font, aBrush, x, y);

        // Dispose of the custom brush.
        aBrush.Dispose();
    }
}

Private Sub DisplayKnownColors(ByVal e As PaintEventArgs)
    Me.Size = New Size(650, 550)
    Dim i As Integer

    ' Get all the values from the KnownColor enumeration.
    Dim colorsArray As System.Array = _
        [Enum].GetValues(GetType(KnownColor))
    Dim allColors(colorsArray.length) As KnownColor

    Array.Copy(colorsArray, allColors, colorsArray.Length)

    ' Loop through printing out the value's name in the colors 
    ' they represent.
    Dim y As Single
    Dim x As Single = 10.0F

    For i = 0 To allColors.Length - 1

        ' If x is a multiple of 30, start a new column.
        If (i > 0 And i Mod 30 = 0) Then
            x += 105.0F
            y = 15.0F
        Else
            ' Otherwise increment y by 15.
            y += 15.0F
        End If

        ' Create a custom brush from the color and use it to draw
        ' the brush's name.
        Dim aBrush As New SolidBrush(Color.FromName( _
            allColors(i).ToString()))
        e.Graphics.DrawString(allColors(i).ToString(), _
            Me.Font, aBrush, x, y)

        ' Dispose of the custom brush.
        aBrush.Dispose()
    Next

End Sub

适用于