How to display the information in textboxes of previous forms in the next form ?

Assuming you are using WinForms, rather than a web based solution, the easiest way is to either:
1) Create a couple of public properties in the destination form and set them just before you call the Show or ShowDialog methods.
or
2) Create a constructor for the destination form which takes the necessary parameters for display.

Either way you encapsulate the data and only feed the destination form instance the data it requires.

Use the Properties of Get{ } and Set { } Method.

Copied this answer from a previous answer I gave to the same question.
Here is the original question. There are more good answers to be found there: How to pass the Value one form to another form in windows form[^]

There are different ways to do this.
One is using a Property on one of your Forms.

MyForm frm = new MyForm();
// It is possible to set MyValue at any point in your code, as long as you have a reference to an instance of MyForm.
frm.MyValue = "some value";
frm.Show();

Another is passing it to the constructor.

public partial class MyForm : Form
{
   private String _myValue;
   public Form1(String myValue)
   {
      InitializeComponent();
      _myValue = myValue;
      // Possibly use myValue here.
   }
   // Do stuff with _myValue here.
}

Usage would look like this:

MyForm frm = new MyForm("some value");
frm.Show();

Another approach could be to use a Method...

public partial class MyForm : Form
{
   private String _myValue;
   public void SetValue(String myValue)
   {
      _myValue = myValue;
     // Possibly do stuff with myValue here.
   }
   // Or use _myValue here.
}

Usage:

MyForm frm = new MyForm();
frm.Show();
// Once again, you can use this anywhere in your code, as long as you have a reference to the instance of MyForm.
frm.SetValue("some value");

Hope it helps! :)

This is the popular question about form collaboration. The most robust solution is implementation of an appropriate interface in form class. Please see my past solution for more detail: How to copy all the items between listboxes in two forms[^].

—SA

Hi zahra1991,

In the first aspx page set the PostBackUrl of the submit button to the next web form :

<form id="form1" runat="server">
 <div>
 <asp:textbox id="name" runat="server" xmlns:asp="#unknown"></asp:textbox>
 <asp:button id="Button1" runat="server" text="Next" postbackurl="tester.aspx" xmlns:asp="#unknown" />
 </div>
 </form>

and in the second form you have the name value in the Params of Request

protected void Page_Load(object sender, EventArgs e)
{
    Response.Write("name = " + Request.Params["name"].ToString());
}

Please mark it as an answer or vote it up if it helped you.
Thanks.

GDC (Global Data Container) is the solution to store the data across various pages. You can implement your own way of GDC as global variables, etc.

store textbox value in session or static variable then using session or static variable insert into textbox of secon web form

try it
session["abc"]=textbox1.text;

on next page

textbox1.text=session["abc"].tostring();