Member Avatar for Falzz

Hi All!

Im having a problem regarding PostBack issues. Ive got a user control (WebUserControl1.ascx) which dynamically creates labels according to the value it is set from the Default.aspx page.

Code In Default.aspx.cs

public partial class _Default : System.Web.UI.Page
    {
        WebUserControl1 _control = new WebUserControl1();

        protected void Page_Init(object sender, EventArgs e)
        {
            _control = Page.LoadControl("WebUserControl1.ascx") as WebUserControl1;
            _control.clickedEvent += new EventHandler(_control_clickedEvent);
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            _control.Count = 5;
            _control.clickedEvent += new EventHandler(_control_clickedEvent);
            _control.draw();
            
            PlaceHolder1.Controls.Add(_control);
        }

        protected void _control_clickedEvent(object sender, EventArgs e)
        {
            Response.Write("Test");
        }

Code In WebUserControl1.ascx.cs

public partial class WebUserControl1 : System.Web.UI.UserControl
    {
        public event EventHandler clickedEvent;

        private int _count;

        public int Count
        {
            get { return _count; }
            set { _count = value; }
        }

        public void draw()
        {
            for (int i = 0; i <= _count; i++)
            {
                Button button = new Button();
                button.Text = Convert.ToString(i);
                button.Click += new EventHandler(button_Click);
                Panel1.Controls.Add(button);
            }
        }

        void button_Click(object sender, EventArgs e)
        {
            clickedEvent(this, e);
        }
    }

Now, on Default.aspx I have a button which creates the instance of a control and assigns the value to count which is then placed on the PlaceHolder. However when I click on the buttons (the ones dynamically created) the click event isnt firing, and the WebUserControl in Page_Init is set as null, meaning its losing its reference

Can anyone help out please?

Thanks

  • 2 Contributors
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  • Latest Post Latest Post by kvprajapati
Member Avatar for kvprajapati

Use Page_Load event to create, initialize and add controls to the page.

protected void Page_Load(object sender, EventArgs e)
    {
        _control = Page.LoadControl("WebUserControl.ascx") as WebUserControl;
        _control.clickedEvent += new EventHandler(_control_clickedEvent);
        _control.Count = 5;
        _control.draw();
        PlaceHolder1.Controls.Add(_control);
    }
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