Data insert in Gridview

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.OleDb;
using System.Data;
public partial class form : System.Web.UI.Page
{
OleDbCommand cmd;
OleDbConnection cn;
OleDbDataAdapter da;
DataSet ds;

protected void Page_Load(object sender, EventArgs e)
{
function();
}

protected void Button2_Click(object sender, EventArgs e)
{
cn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=F:\\Sandeep cmc\\Database21.accdb");
da = new OleDbDataAdapter("insert into userr (name1)values('"+TextBox2.Text+"')", cn);
ds = new DataSet();
da.Fill(ds);
function();

}

public void function()

{
cn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=F:\\Sandeep cmc\\Database21.accdb");
da = new OleDbDataAdapter("select * from userr", cn);
ds = new DataSet();
da.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();


}
}