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ViewState in Dynamic Control

, 22 Apr 2009 CPOL 67.3K 2.7K 28
Maintaining ViewState while working with Dynamic Control
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class DynamicControl : System.Web.UI.Page
    private const string VIEWSTATEKEY = "ContactCount";

    protected void Page_Load(object sender, EventArgs e)
        if (!Page.IsPostBack)
            //Set the number of default controls
            ViewState[VIEWSTATEKEY] = ViewState[VIEWSTATEKEY] == null ? 2 : ViewState[VIEWSTATEKEY];
            //Load the contact control based on Vewstate key

    /// <summary>
    /// Load the contact control based on Vewstate key
    /// </summary>
    private void LoadContactControls()
        for (int i = 0; i < int.Parse(ViewState[VIEWSTATEKEY].ToString()); i++)

    /// <summary>
    /// Handels the click event of AddMore button
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnAddMore_Click(object sender, EventArgs e)
        ViewState[VIEWSTATEKEY] = int.Parse(ViewState[VIEWSTATEKEY].ToString()) + 1;

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