Creating dynamic textbox in asp using c#

Hi,

 try this Attached Source Code...

Hi Chiranjeevi,


using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page
{
    Panel pnlTextBox;
    protected void Page_PreInit(object sender, EventArgs e)
    {
        //Create a Dynamic Panel
        pnlTextBox = new Panel();
        pnlTextBox.ID = "pnlTextBox";
        pnlTextBox.BorderWidth = 1;
        pnlTextBox.Width = 300;
        this.form1.Controls.Add(pnlTextBox);

        //Create a LinkDynamic Button to Add TextBoxes
        LinkButton btnAddtxt = new LinkButton();
        btnAddtxt.ID = "btnAddTxt";
        btnAddtxt.Text = "Add TextBox";
        btnAddtxt.Click += new System.EventHandler(btnAdd_Click);
        this.form1.Controls.Add(btnAddtxt);

        //Recreate Controls
        RecreateControls("txtDynamic", "TextBox");
    }
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void btnAdd_Click(object sender, EventArgs e)
    {
        int cnt = FindOccurence("txtDynamic");
        CreateTextBox("txtDynamic-" + Convert.ToString(cnt + 1));
    }
    private int FindOccurence(string substr)
    {
        string reqstr = Request.Form.ToString();
        return ((reqstr.Length - reqstr.Replace(substr, "").Length) / substr.Length);
    }
    private void RecreateControls(string ctrlPrefix, string ctrlType)
    {
        string[] ctrls = Request.Form.ToString().Split('&');
        int cnt = FindOccurence(ctrlPrefix);
        if (cnt > 0)
        {
            for (int k = 1; k <= cnt; k++)
            {
                for (int i = 0; i < ctrls.Length; i++)
                {
                    if (ctrls[i].Contains(ctrlPrefix + "-" + k.ToString()) && !ctrls[i].Contains("EVENTTARGET"))
                    {
                        string ctrlID = ctrls[i].Split('=')[0];

                        if (ctrlType == "TextBox")
                        {
                            CreateTextBox(ctrlID);
                        }
                        break;
                    }
                }
            }
        }
    }
    private void CreateTextBox(string ID)
    {
        TextBox txt = new TextBox();
        txt.ID = ID;
        txt.AutoPostBack = true;
        txt.TextChanged += new EventHandler(OnTextChanged);
        pnlTextBox.Controls.Add(txt);

        Literal lt = new Literal();
        lt.Text = "
";
        pnlTextBox.Controls.Add(lt);
    }
    protected void OnTextChanged(object sender, EventArgs e)
    {
        TextBox txt = (TextBox)sender;
        string ID = txt.ID;
        ClientScript.RegisterClientScriptBlock(this.GetType(), "Alert", "");
        //Place the functionality here
    }
}


Thanks

void CreateTextBoxes(Object sender, EventArgs e)
{
int n = Int32.Parse(txtTBCount.Text);

// now, create n TextBoxes, adding them to the PlaceHolder TextBoxesHere
for (int i = 0; i < n; i++)
{
TextBoxesHere.Controls.Add(new TextBox());
}

// now, set the Text property of each TextBox
IterateThroughChildren(this);
}


void IterateThroughChildren(Control parent)
{
foreach (Control c in parent.Controls)
{
if (c.GetType().ToString().Equals("System.Web.UI.WebControls.TextBox")
&& c.ID == null)
{
// ...do something...
}

if (c.Controls.Count > 0)
{
IterateThroughChildren(c);
}
}
}