更改系统托盘图标图像

Question

我在.Net中构建了一个托盘应用程序,工作正常.但是,用户希望在某些条件下在运行时更改"托盘图标"图像.为了简单起见,让我们说,有些东西不起作用 - 托盘图标应显示红色图像; 如果一切都很好,它应该显示绿色.我不知道如何在.Net中实现这一目标.

请提供一些意见.谢谢

我为Tray构建了CustomApplicationContent.下面的一些片段:

Program.cs中

[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 - 在上下文中？用户可能无法打开表单,因此在表单上添加计时器可能无法一直运行.如何更改图标？

Answer 1

您可以将2个图标添加到项目的Resource.resx文件,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;

要么

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

要添加图标Resourse.resx,请Resources.resx从Properties项目的文件夹中打开.然后从设计器工具栏的第一个下拉列表中选择Icons,然后从下一个下拉列表中选择Add Existing File...并添加图标文件.您还可以在此处重命名项目.

Answer 2

我将创建您的Icons Embedded Resources,然后使用这样的代码在运行时更改当前显示的代码:

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