How can I add a new dynamic control on button click? - asp.net

Question

When I click btnGDynamicCont I want to load the first set of controls, then on each further click of that button, add a new control (textbox) alongside the other ones, so each time it is clicked I am adding a new textbox across state.
Do you know where I should add the creation of the new textbox in order to keep it after each postback?
{
protected void Page_Load(object sender, EventArgs e)
{
if (Convert.ToString(ViewState["Generated"]) == "true")
GenerateDynamicControls();
}
public void GenerateDynamicControls()
{
TextBox txtDynamic = new TextBox();
txtDynamic.ID = "txtDynamic";
txtDynamic.Text = "Dynamic TextBox";
Page.Form.Controls.Add(txtDynamic);
TextBox txtDynamic2 = new TextBox();
txtDynamic2.ID = "txtDynamic2";
txtDynamic2.Text = "Dynamic Textbox";
Page.Form.Controls.Add(txtDynamic2);
}
protected void btnGDynamicCont_Click1(object sender, EventArgs e)
{
if (Convert.ToString(ViewState["Generated"]) != "true")
{
GenerateDynamicControls();
ViewState["Generated"] = "true";
}
else
{
Response.Write("<h2>Controls are already exist in page</h2>");
}
}
}
}

Answer 1

Dynamic controls are usually recreated at the Page_Load method. For more information, please refer to the Dynamically Created Controls in ASP.NET article.

Answer 2

You can refer the below link where a very similar issue is addressed.
unable to add more than one server control dynamically in asp.net
Everytime a postback happens, you should recreate the already existing controls(dynamically added) in your page_load event and the new controls are to be created in the button_click event.
Use some logic to generate ids for the controls for the viewstate to be maintained. VIEWSTATE will be taken care automatically if the ids of the controls generated before and after postback are the same.
One way to keep track of the number of textboxes is to store the count in session.