在单独的窗体上更改notifyicon

我假设Form1在某一点上创建了Form2。此时,可以将Form1的引用传递给Form2,以便Form2可以访问Form1的DisplayIcon属性。

所以你最终会得到

//Somewhere in the code of form1
public void btnShowFormTwoClick(object sender, EventArgs e) 
{
    Form2 form2 = new Form2();
    form2.Form1 = this; //if this isn't done within form1 code you wouldn't use this but the form1 instance variable
    form2.Show();
}

//somewhere in the code of form2
public Form1 Form1 { get;set;} //To create the property where the form1 reference is storred.
this.Form1.DisplayIcon = "on.ico";

您的怀疑是正确的,您正在创建Form1的第二个实例,这将导致一个重复的NotifyIcon。

您需要从Form2引用Form1才能在 正确的实例 .

一种可能的解决方案是在创建Form2时将引用从Form1传递到Form2(我假设您从Form1创建Form2)。

例如:

Form2 form2 = new Form2();
form2.Form1 = this; // Form1 is custom property on Form2 that you need to add
form2.Show();

在Form2上,自定义属性将定义为:

 //Note the type is Form1, in order to get to your public DisplayIcon property. 
 public Form1 Form1 { get;set;}