C# 是否更改子菜单中ToolstripSeparator的背景色？

我有一个

ContextMenuStrip

，它有4个项目。其中一个项目有一个子菜单和另外4个项目，其中一个是分隔符。我更改了所有项目的背景色，但分隔符的背景色没有更改

为什么以及如何改变它

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我今天刚刚面对这个问题，发现解决它非常简单

有同样情况的：

解决方案：

创建一个继承

ToolStripSeparator

类的类，并向

绘制
事件处理程序添加一个方法以绘制分隔符：

public class ExtendedToolStripSeparator : ToolStripSeparator
{
    public ExtendedToolStripSeparator()
    {
        this.Paint += ExtendedToolStripSeparator_Paint;
    }

    private void ExtendedToolStripSeparator_Paint(object sender, PaintEventArgs e)
    {
        // Get the separator's width and height.
        ToolStripSeparator toolStripSeparator = (ToolStripSeparator)sender;
        int width = toolStripSeparator.Width;
        int height = toolStripSeparator.Height;

        // Choose the colors for drawing.
        // I've used Color.White as the foreColor.
        Color foreColor = Color.FromName(Utilities.Constants.ControlsRelatedConstants.standardForeColorName);
        // Color.Teal as the backColor.
        Color backColor = Color.FromName(Utilities.Constants.ControlsRelatedConstants.standardBackColorName);

        // Fill the background.
        e.Graphics.FillRectangle(new SolidBrush(backColor), 0, 0, width, height);

        // Draw the line.
        e.Graphics.DrawLine(new Pen(foreColor), 4, height / 2, width - 4, height / 2);
    }
}

ToolStripSeparator toolStripSeparator = new ExtendedToolStripSeparator();

this.DropDownItems.Add(newGameToolStripMenuItem);
this.DropDownItems.Add(addPlayerToolStripMenuItem);
this.DropDownItems.Add(viewResultsToolStripMenuItem);
// Add the separator here.
this.DropDownItems.Add(toolStripSeparator);
this.DropDownItems.Add(exitToolStripMenuItem);

然后添加分隔符：

public class ExtendedToolStripSeparator : ToolStripSeparator
{
    public ExtendedToolStripSeparator()
    {
        this.Paint += ExtendedToolStripSeparator_Paint;
    }

    private void ExtendedToolStripSeparator_Paint(object sender, PaintEventArgs e)
    {
        // Get the separator's width and height.
        ToolStripSeparator toolStripSeparator = (ToolStripSeparator)sender;
        int width = toolStripSeparator.Width;
        int height = toolStripSeparator.Height;

        // Choose the colors for drawing.
        // I've used Color.White as the foreColor.
        Color foreColor = Color.FromName(Utilities.Constants.ControlsRelatedConstants.standardForeColorName);
        // Color.Teal as the backColor.
        Color backColor = Color.FromName(Utilities.Constants.ControlsRelatedConstants.standardBackColorName);

        // Fill the background.
        e.Graphics.FillRectangle(new SolidBrush(backColor), 0, 0, width, height);

        // Draw the line.
        e.Graphics.DrawLine(new Pen(foreColor), 4, height / 2, width - 4, height / 2);
    }
}

ToolStripSeparator toolStripSeparator = new ExtendedToolStripSeparator();

this.DropDownItems.Add(newGameToolStripMenuItem);
this.DropDownItems.Add(addPlayerToolStripMenuItem);
this.DropDownItems.Add(viewResultsToolStripMenuItem);
// Add the separator here.
this.DropDownItems.Add(toolStripSeparator);
this.DropDownItems.Add(exitToolStripMenuItem);

结果：