Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
646 views
in Technique[技术] by (71.8m points)

c# - Button trigger event GotFocus repeattly

I have created a set of button and attach Click event and GotFocus event to them.

for (int i = 0; i < NumberOfQuestion; i++)
        {
            RadButton button = new RadButton();
            // radButton1
            // 
            button.Anchor = AnchorStyles.None;
            button.Font = new Font("Segoe UI", 8.25F, FontStyle.Bold);
            button.Location = new Point(65 * i + 15, 10);
            button.Name = "btn_cauhoi" + (i + 1);
            button.Size = new Size(60, 35);
            button.TabIndex = 1 + i;
            button.Text = "Cau " + (i + 1);

            button.Tag = (i + 1);

            button.Click += Button_Click;
            button.GotFocus += Button_Click; ;

            // 

            panel_nut_cauhoi.Controls.Add(button);
        }

   private void Button_Click(object sender, EventArgs e)
    {
        var button = (RadButton)sender;
        var index = (int)button.Tag;
        MessageBox.Show(index.ToString());
    }

It triggers Click event correctly but with GotFocus event it trigger repeatly.

Somebody helps me, please.

Thanks in advances.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

When you click ok on message box it loose focus and get focus again. So if you delete MessageBox.Show() you will see its gonna trigger only one time, so you can test code like below, you will see the name of the button as btn_cauhoi1 or btn_cauhoi2 or btn_cauhoi3 up to which button you do click, it means its gonna trigger only one time.

        var button = (RadButton)sender;
        var index = (int)button.Tag;
        //MessageBox.Show(index.ToString());
        this.Text = button.Name;

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...