Hi, I want to export gridview data to sqlserver

using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Data.SqlClient; namespace Insert_data_from_Gridview_database { public partial class _Default : System.Web.UI.Page { string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString; SqlCommand com; protected void btn_show_Click(object sender, EventArgs e) { DataSet reportData = new DataSet(); reportData.ReadXml(Server.MapPath("student.xml")); GridView1.DataSource = reportData; GridView1.DataBind(); } protected void btn_insert_Click(object sender, EventArgs e) { foreach (GridViewRow g1 in GridView1.Rows) { SqlConnection con = new SqlConnection(connStr); com = new SqlCommand("insert into student(sid,sname,smarks,saddress) values ('" + g1.Cells[0].Text + "','" + g1.Cells[1].Text + "','" + g1.Cells[2].Text + "','" + g1.Cells[3].Text + "')", con); con.Open(); com.ExecuteNonQuery(); con.Close(); } Label1.Text = "Records inserted successfully"; } } }