时间:2019-05-11 标签:c#toolstripmenuitem更改背景winforms [英] c# winforms toolstripmenuitem change background

问题描述

好的，请告诉我为什么这不起作用.

OK, someone please tell me why this is not working.

我在 winforms 应用程序 (c#) 中有一个简单的 MenuStrip.它有 ToolStripMenuItems.

I have a simple MenuStrip in winforms app (c#). It has ToolStripMenuItems.

在设计器的属性窗口中，我选择 BackColor = White.在 Desginer.cs 文件中我可以看到它.

In the properties window of the designer, I select BackColor = White. In Desginer.cs file I can see it.

运行应用，背景色为Control(灰色).

Running the app, the background color is Control (grey).

这是怎么回事?为什么背景色不是白色?

What is going? Why is the backcolor not white?

谢谢

编辑

这是来自 Designer.cs 的代码:

This is the code from the Designer.cs:

   this.menuRefresh.BackColor = System.Drawing.Color.White;

编辑 2:

在代码中，加载表单后(在构造函数和 Form_Load 事件中，我已经放置了这个:

In the code, after loading the form (in the constructor and also in Form_Load event I've placed this:

 menuRefresh.BackColor = Color.White;

也没有帮助.

推荐答案

您需要实现一个简单的渲染器类来实现这一点.下面是一个例子:

You need to implement a simple renderer class to achieve this. Here is an example:

public partial class Form1 : Form 
{ 
    public Form1() 
    { 
      InitializeComponent(); 
      menuStrip1.Renderer = new MyRenderer(); 
    } 

    private class MyRenderer : ToolStripProfessionalRenderer 
    { 
        protected override void OnRenderMenuItemBackground(ToolStripItemRenderEventArgs e)      
        { 
            Rectangle rc = new Rectangle(Point.Empty, e.Item.Size); 
            Color c = e.Item.Selected ? Color.Azure : Color.Beige; 
            using (SolidBrush brush = new SolidBrush(c)) 
                e.Graphics.FillRectangle(brush, rc); 
        } 
    } 
} 

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