更改系统托盘图标图像

Changing System Tray Icon Image

我在 .Net 中构建了一个托盘应用程序,它运行良好。但是,用户希望在某些情况下在运行时更改托盘图标图像。为了简单起见,让我们说,有些东西不起作用——托盘图标应该显示红色图像;如果一切正常,它应该显示绿色。我不确定如何在 .Net 中实现这一点。

请就此提供一些意见。谢谢

我为 Tray 构建了 CustomApplicationContent。下面是一些片段:

Program.cs

[STAThread]
    static void Main()
    {
        if (!SingleInstance.Start()) { return; }
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        try
        {
            var applicationContext = new CustomApplicationContext();
            Application.Run(applicationContext);
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "Program Terminated Unexpectedly",
                MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
        SingleInstance.Stop();
    }

CustomApplicationContext.cs

public class CustomApplicationContext : ApplicationContext
{
    private System.ComponentModel.IContainer components;    // a list of components to dispose when the context is disposed
    private NotifyIcon notifyIcon;
    private static readonly string IconFileName = "green.ico";
    private static readonly string DefaultTooltip = "Employee Management System";
    private readonly TrayManager trayManager;

    public CustomApplicationContext()
    {
        InitializeContext();
        trayManager = new TrayManager(notifyIcon);
    }

    protected override void Dispose(bool disposing)
    {
        if (disposing && components != null) { components.Dispose(); }
    }


    private void InitializeContext()
    {
        components = new System.ComponentModel.Container();
        notifyIcon = new NotifyIcon(components)
        {
            ContextMenuStrip = new ContextMenuStrip(),
            Icon = new Icon(IconFileName),
            Text = DefaultTooltip,
            Visible = true
        };
        notifyIcon.ContextMenuStrip.Opening += ContextMenuStrip_Opening;
        notifyIcon.DoubleClick += notifyIcon_DoubleClick;
        //notifyIcon.MouseUp += notifyIcon_MouseUp;
    }
private void notifyIcon_DoubleClick(object sender, EventArgs e)
    {
        ShowAboutForm();
    }
private TestForm testForm;

    private void ShowAboutForm()
    {
        if (testForm == null)
        {
            testForm = new TestForm { trayManager = trayManager };
            testForm.Closed += testForm_Closed; ; // avoid reshowing a disposed form
            testForm.Show();
        }
        else { testForm.Activate(); }
    }


    void testForm_Closed(object sender, EventArgs e)
    {
        testForm = null;
    }

我在哪里添加计时器 - 在 Context 中?用户可能不会打开表单,因此在表单上添加计时器可能不会一直有效。如何更改图标?

我会制作您的图标 嵌入式资源,然后使用这样的代码在 运行 时更改当前显示的图标:

notifyIcon.Icon = new Icon(this.GetType(), "red.ico");

您可以在项目的Resource.resx文件中添加2个图标,Red.ico和Green.ico并在不同情况下以这种方式使用它们:

this.notifyIcon1.Icon = Properties.Resources.Red;

this.notifyIcon1.Icon = Properties.Resources.Green;

要将图标添加到 Resourse.resx,请从 project.then 的 Properties 文件夹中打开 Resources.resx 从设计器工具栏的第一个下拉列表中,select Icons,然后从下一个下拉列表 select Add Existing File... 中添加您的图标文件。您也可以在此处重命名项目。