Apply changes to mainforms Form.Icon at runtime

Question

I have a System.Windows.Forms.Form and want to change the Form.Icon at runtime to display a status. I\'ve managed to load the icon from the projects ressources:

Answer 1

Yes, you have to change the icon whenever the status of your application changes.

I tested this out with a simple WinForm application:

private void button1_Click(object sender, EventArgs e)
{
    this.Icon = Properties.Resources.Gear;
}

private void button2_Click(object sender, EventArgs e)
{
    this.Icon = Properties.Resources.UAC_shield;
}

When the program is running, clicking on each button will change the form icon (and, of course, the icon in the taskbar) to the specified icon. I just picked some icons from the set that ships with Visual Studio and added them to the project's Resource file.

You should be able to add a simple method that you can call anywhere in your code which sets the icon (and you can call it from Form_Load as well):

private void ChangeIconStatus(string statusText)
{
    Type type = this.GetType();
    System.Resources.ResourceManager resources =
    new System.Resources.ResourceManager(type.Namespace + ".Properties.Resources", this.GetType().Assembly);
    this.Icon = (System.Drawing.Icon)resources.GetObject(type.Namespace + ".Icons." + statusText + ".ico");
}