adding row to gridview on buton click

i have three textbox and a button...i want to add row to gridview on button click...and put values of textbox n gridview textbox....
eg.. i have 3 texboxs t1,t2,t3 and button b
on button click b...
add text of t1 to gridview cell[0] ,t2 text to gridview cell[1]. t3 text to gridview[2]...

and one thing more i don't wanna replace any row..

on one button click 1st row will be added
on 2nd button click 2nd row will be added.. so .on..

then i am gonna save all values to database...
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exploit344Author Commented:
DataTable dt;
    protected void Page_Load(object sender, EventArgs e)
        if (!Page.IsPostBack)
            dt = new DataTable();
            dt = (DataTable)ViewState["DataTable"];
        ViewState["DataTable"] = dt;

    private void MakeDataTable()

    protected void Button2_Click(object sender, EventArgs e)

    private void AddToDataTable()
        DataRow dr = dt.NewRow();
        dr["Name"] = txtName.Text;
        dr["Number"] = txtNumber.Text;

    private void BindGrid()
        GridView1.DataSource = dt;

this code is working fine.. but this is for simple gridview..
i mean i have textbox in gridview.. now how do i put values of textbox above gridview in to textbox...

cause at last i have to save gridview into table.. so my prob is i have textbox in gridview.. so can u please modify this code according to textbox inside gridview.. i mean insert values to gridview textbox
just put this code to save button..
foreach(GridViewRow row in GridView1.Rows)
            string st = row.Cells[0].Text;
            string st1 = row.Cells[1].Text;
                cmd = new SqlCommand("insert into t1(first,second)values(@first,@second)", con);
                cmd.Parameters.AddWithValue("@second", st1);

u don't need a textbox or label.. its working fine..

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exploit344Author Commented:
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