如何防止控件的背景色发生更改？

Question

我希望从基础面板继承的面板无论在何处使用都有固定的 BackColor 。我的基本面板如下所示：

public class MyPanel
{
    public override Color BackColor
    {
        get
        {
            return base.BackColor;
        }
        set
        {
            base.BackColor = Color.Red;
        }
    }
}

BackColor 未在示例表单的 Designer.cs 文件中设置：

this.sampleControl.Font = new System.Drawing.Font("Tahoma", 8.25F,
    System.Drawing.FontStyle.Regular, 
    System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.sampleControl.Location = new System.Drawing.Point(0, 0);
this.sampleControl.Margin = new System.Windows.Forms.Padding(5);
this.sampleControl.Name = "sampleControl";
this.sampleControl.Padding = new System.Windows.Forms.Padding(2, 0, 2, 2);
this.sampleControl.Size = new System.Drawing.Size(230, 100);
this.sampleControl.TabIndex = 1;

事实上，任何地方都没有设置颜色，所以我想它以某种方式从它所在的面板获取属性。我怎样才能防止这种情况发生？

Answer 1

怎么样：

public class MyPanel : Panel
{
    private Color backColor = Color.Red;

    public MyPanel()
    {
        // Set the color once
        this.BackColor = backColor;
    }

    public override Color BackColor
    {
        get
        {
            return base.BackColor;
        }
        set
        {
            base.BackColor = backColor;
        }
    }
}

Answer 2

只需在 MyPanel 构造函数中进行设置即可。

BackColor=Color.Red;

您不需要覆盖，除非您想阻止其他人更改它。