How to dynamically create textboxes in asp.net and c#.

How we Dynamically Create TextBoxes in ASP.NET and get the Text of that TextBoxes :-

using System;
using System.Configuration;
using System.Web.UI.WebControls;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
int addedBooks = 2;// Set Required Number of Dynamic TextBoxes
ViewState["addedBooks"] = addedBooks;
CreateDynamicTextBox();
}
else
{
//if postback dynamic generated controls are invisible
//so we can bind in each post back
CreateDynamicTextBox();
}

}

//Method for Creating Dynamic TextBoxes
protected void CreateDynamicTextBox()
{
int addedBooks =Convert.ToInt16(ViewState["addedBooks"]);
for (int i = 0; i < addedBooks; i++)
{
Literal lt1 = new Literal();
lt1.Text = "Book Name : " + (i + 1) + " ";
pnl1.Controls.Add(lt1);// "pnl1" is a id of Panel

TextBox MyTextBox = new TextBox();
//Assigning the textbox ID name
MyTextBox.ID = "tb" + i;
MyTextBox.Width = 100;
MyTextBox.Height = 15;
MyTextBox.Text = String.Empty;
pnl1.Controls.Add(MyTextBox);

Literal lt = new Literal();
lt.Text = "
";
pnl1.Controls.Add(lt);
}
}

//Find Text of Dynamic TextBoxes on Button Click
protected void btnSubmit_Click(object sender, EventArgs e)
{
int NoOfDynamicTextBoxes = Convert.ToInt32(ViewState["addedBooks"]);
String[] books = new String[NoOfDynamicTextBoxes];
for (int i = 0; i < NoOfDynamicTextBoxes; i++)
{
String txtId = "tb" + i;// Produce id of Dynamically created TextBoxes
TextBox txtUserName = pnl1.FindControl(txtId) as TextBox;
if (txtUserName != null)
{
books[i] = txtUserName.Text;
}
}
}
}

Code snippet to create a textbox control for n number of times,

//Declaring the variable with limit
int n=5;
for (int i=0;i<n;i++)
{
TextBox MyTextBox=new TextBox();
//Assigning the textbox ID name 
MyTextBox.ID = "tb" +""+ ViewState["num"] + i;
MyTextBox.Width = 540;
MyTextBox.Height = 60;
MyTextBox.TextMode = TextBoxMode.MultiLine;
this.Controls.Add(MyTextBox);
}

I hope this could help you.

With regards
R.K.

TextBox txt = new TextBox();

    txt.ID = ID;

    txt.AutoPostBack = true;

    txt.TextChanged += new EventHandler(OnTextChanged);

    this.Form1.Controls.Add(txt);