two different form data transfer how can ı do?

On your first form, a button handler to get the data from the text box & open the second form

private void buttonHandler_Activate(object sender, System.EventArgs e)
{
    // Assuming you've done some sort of validation
    int customerId = Convert.ToInt32(this.personTextBox.Text);

    // Assuming your second form is called 'Gridform'!
    using (GridForm grid = new GridForm ())
    {
        grid.GetCustomerDetails(customerId);

        // Doesn't have to be a dialog here
        grid.ShowDialog(this);
    }
}

On your second form (GridForm), a public method that takes the customer id and populates the screen.

public void GetCustomerDetails(int customerId)
{
   // Some sort of datbase operation here to get the data
   // This is copy-paste from microsoft 'DataSet' MSDN article

      string cString = "Persist Security Info=False;Integrated Security=SSPI;database=northwind;server=mySQLServer";
      SqlConnection myConnection = new SqlConnection(cString);
      // Create a SqlDataAdapter.
      SqlDataAdapter myAdapter = new SqlDataAdapter();
      myConnection.Open();
      SqlCommand myCommand = new SqlCommand("SELECT * FROM MyTable WHERE CustomerId = " + customerId.ToString(),
      myConnection);
      myCommand.CommandType = CommandType.Text;
   
      myAdapter.SelectCommand = myCommand;
      ds = new DataSet("Customers");
      myAdapter.Fill(ds);

// Now you've got data in a dataset, bind it to your grid on this form
    this.myGridReference.DataSource = ds;
    this.myGridReference.DataBind();
}

Disclaimer - Dodgy data access that I don't endorse at all! But you get the idea

* On you 1st form, validate data entry, create instance of second form, pass collected data to second form

* 2nd form has method to receive entry and populate itself