Form1_FormClosing方法'从未使用'，设置不保存

Question

I'm saving the location of my application but it does not want to keep the value. What happens in the code now is that the _FormClosing is dimmed and "it is never used". Is there anybody that can see where I go wrong with this code below?

public Form1()
    {
        InitializeComponent();            
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        if (Settings.Default.WindowLocation != null)
            this.Location = Settings.Default.WindowLocation;

        this.txtInput60.KeyPress += new System.Windows.Forms.KeyPressEventHandler(CheckEnterKeyPress);
    }

    private void Form1_FormClosing(object sender, FormClosedEventArgs e)
    {
        Settings.Default.WindowLocation = this.Location;
        Settings.Default.Save();
    }

    private void CheckEnterKeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
    {
        if (e.KeyChar == (char)Keys.Return)
        {
            decimal minutes;
            decimal.TryParse(txtInput60.Text, out minutes);

            if (minutes > 0)
            {
                var total = (int) (minutes/60*100);
                txtOutput100.Text = total.ToString();
                Clipboard.SetText(total.ToString());
            }
        }
    }

In my application properties I am setting the WindowLocation with WindowLocation, system.draw.point, user, 0;0

Answer 1

Sounds like your Form1_FormClosing event is no longer hooked up to the FormClosing event of the form. You can check this by going to the properties of the form at design-time and selecting events pane, looks like this:

Make sure your Form1_Closing method is hooked up to the FormClosing event, if not, drop down the list and select it.

Answer 2

You need to attach the event FormClosing to the method Form1_FormClosing.

This can be done in code of the Form_Load method:

this.FormClosing += Form1_FormClosing;

Or by setting the event in the designer

Change the type of the method parameter from FormClosedEventArgs to FormClosingEventArgs:

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
    Settings.Default.WindowLocation = this.Location;
    Settings.Default.Save();
}

Answer 3

Check in Form1 in Designer. Open the EventExplorer of Form1 and check the value for the Closing event. Maybe it is not attached to your method.

Answer 4

您的设计器可能没有附加到FormClosed事件，尝试在构造函数中添加它，就在InitializeComponent();

this.FormClosing += Form1_FormClosing;