ASP.NET

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File Size:	4.35 MB
Last Update:	11/25/2012 01:44:47 UTC
Supported Browsers:</td><br /> <td><code>Chrome, IE8+, FireFox, Opera, Safari
Offical Website:	Go to Website
License:</td><br /> <td>Free for non-commercial use

protected void Page_Load(object sender, EventArgs e)
        {
            if(!Page.IsPostBack) //this first time page Load/isPostback when call this page
            {
              GenerateControlSelf();//for generate custom control in holder(as PlaceHolder)
            }
            else //second Page.isPostback
            {
                // you must declare again your custom control in second Page.isPostback
                var txt = new TextBox { ID = "tbx", Text = DateTime.Now.ToString(CultureInfo.InvariantCulture), ClientIDMode = ClientIDMode.Static };
                holder.Controls.Add(txt);
                var ddl = new DropDownList { ID = "ddlx" };

                var nextYear = Convert.ToInt32(DateTime.Now.Year.ToString(CultureInfo.InvariantCulture)) + 1;
                var lastYear = Convert.ToInt32(DateTime.Now.Year.ToString(CultureInfo.InvariantCulture)) - 10;
                for (var n = lastYear; n < nextYear; n++)
                {
                    ddl.Items.Add(n.ToString(CultureInfo.InvariantCulture));
                }


                ddl.AutoPostBack = true;
                ddl.SelectedIndex = 0;
                ddl.DataBind();
                holder.Controls.Add(ddl);
            }

        }
        private void GenerateControlSelf()
        {
            
            var txt = new TextBox { ID = "tbx", Text = DateTime.Now.ToString(CultureInfo.InvariantCulture) ,ClientIDMode = ClientIDMode.Static};
            holder.Controls.Add(txt);            
            var ddl = new DropDownList {ID = "ddlx"};

            var nextYear = Convert.ToInt32(DateTime.Now.Year.ToString(CultureInfo.InvariantCulture)) + 1;
            var lastYear = Convert.ToInt32(DateTime.Now.Year.ToString(CultureInfo.InvariantCulture)) - 10;
            for (var n = lastYear; n < nextYear; n++)
            {
                ddl.Items.Add(n.ToString(CultureInfo.InvariantCulture));
            }


            ddl.AutoPostBack = true;
            ddl.SelectedIndex = 0;
            ddl.DataBind();
            holder.Controls.Add(ddl);
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            //this for get custom control DropDownLost with id 'ddlx'
            foreach (Control ctl in holder.Controls)
            {
                if (ctl is DropDownList)
                {
                    DropDownList ddl = (DropDownList) ctl;
                    object x = ddl.SelectedItem;
                }

            }

            //this for get custom control textBox with id 'tbx'
            foreach (Control ctl in holder.Controls)
            {
                if (ctl is TextBox)
                {
                    TextBox tbx = (TextBox)ctl;
                    object x = tbx.Text;
                }

            }

        }