c# - MenuItem 的颜色变化

Question

我正在编写一个备份工具。在我的工具之上，我有一个包含两个工具条菜单项的菜单条。我根据我的期望稍微改变了颜色。不集中菜单看起来很棒：

当我现在单击菜单项“文件”以打开上下文菜单时，颜色变为白色，我无法再阅读文本：

谁能告诉我在哪里可以改变这种行为？我使用 Visual Studio 2013 Ultimate，Windows 窗体应用程序，代码在 C# 中。

这是代码：

// // initializing menuStrip1 // this.menuStrip1.BackColor = System.Drawing.Color.MediumBlue; this.menuStrip1.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center; this.menuStrip1.Font = new System.Drawing.Font("Segoe UI Semilight", 15.75F, System.Drawing.FontStyle.Regular,
System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.menuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] { this.fileToolStripMenuItem, this.helpToolStripMenuItem}); this.menuStrip1.Location = new System.Drawing.Point(0, 0); this.menuStrip1.MinimumSize = new System.Drawing.Size(0, 40); this.menuStrip1.Name = "menuStrip1"; this.menuStrip1.Size = new System.Drawing.Size(1056, 40); this.menuStrip1.TabIndex = 77; this.menuStrip1.Text = "menuStrip1"; // // initializing fileToolStripMenuItem and adding to menuStrip1 // this.fileToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] { this.saveToolStripMenuItem, this.saveAsToolStripMenuItem, this.loadToolStripMenuItem}); this.fileToolStripMenuItem.Font = new System.Drawing.Font("Calibri Light", 15.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.fileToolStripMenuItem.ForeColor = System.Drawing.SystemColors.ControlLightLight; this.fileToolStripMenuItem.Name = "fileToolStripMenuItem"; this.fileToolStripMenuItem.Size = new System.Drawing.Size(54, 36); this.fileToolStripMenuItem.Text = "File"; this.fileToolStripMenuItem.Click += new System.EventHandler (this.fileToolStripMenuItem_Click); // // initializing saveToolStripMenuItem and adding to fileToolStripMenuItem // this.saveToolStripMenuItem.BackColor = System.Drawing.Color.MediumBlue; this.saveToolStripMenuItem.ForeColor = System.Drawing.SystemColors.ControlLightLight; this.saveToolStripMenuItem.Name = "saveToolStripMenuItem"; this.saveToolStripMenuItem.Size = new System.Drawing.Size(166, 30); this.saveToolStripMenuItem.Text = "Save"; this.saveToolStripMenuItem.Click += new System.EventHandler (this.saveToolStripMenuItem_Click); //

Answer 1

您可以创建自己的ProfessionalColorTable并覆盖它的属性：

namespace WindowsFormsApplication1
{
     public partial class Form1 : Form
     {
         public Form1()
         {
             InitializeComponent();
             menuStrip1.Renderer = new ToolStripProfessionalRenderer(new MyColorTable());
         }
     }

     public class MyColorTable : ProfessionalColorTable
     {
         public override Color ToolStripDropDownBackground
         {
             get
             {
                 return Color.Blue;
             }
         }

         public override Color ImageMarginGradientBegin
         {
             get
             {
                 return Color.Blue;
             }
         }

         public override Color ImageMarginGradientMiddle
         {
             get
             {
                 return Color.Blue;
             }
         }

         public override Color ImageMarginGradientEnd
         {
             get
             {
                 return Color.Blue;
             }
         }

         public override Color MenuBorder
         {
             get
             {
                 return Color.Black;
             }
         }

         public override Color MenuItemBorder
         {
             get
             {
                 return Color.Black;
             }
         }

         public override Color MenuItemSelected
         {
             get
             {
                 return Color.Navy;
             }
         }

         public override Color MenuStripGradientBegin
         {
             get
             {
                 return Color.Blue;
             }
         }

         public override Color MenuStripGradientEnd
         {
             get
             {
                 return Color.Blue;
             }
         }

         public override Color MenuItemSelectedGradientBegin
         {
             get
             {
                 return Color.Navy;
             }
         }

         public override Color MenuItemSelectedGradientEnd
         {
             get
             {
                 return Color.Navy;
             }
         }

         public override Color MenuItemPressedGradientBegin
         {
             get
             {
                 return Color.Blue;
             }
         }

         public override Color MenuItemPressedGradientEnd
         {
             get
             {
                 return Color.Blue;
             }
         }
     }
}

这是上面代码的结果：

Answer 2

默认情况下，此功能不是开箱即用的。您需要Renderer为您的工具条创建一个自定义来实现这一点。

创建一个继承自的类ToolStripProfessionalRenderer-

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

并将此渲染器附加到表单构造函数中的菜单条 -

    public Form1()
    {
        InitializeComponent();
        menuStrip1.Renderer = new BlueRenderer();
    }