Data Insertion in data base

Question

Hey guys,

                  can any one help me please. i am facing error while inserting data in database using asp .net.

                   Here is the complete code

                   

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data.SqlClient;

using System.Data;

public partial class home : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

SqlConnection con = new SqlConnection("");

protected void Button1_Click(object sender, EventArgs e)

{

string connection = "Data Source=127.0.0.1; Initial Catalog=test; Integrated Security=true";

con.ConnectionString=connection;

try

{

con.Open();

SqlCommand cmd = new SqlCommand("insert into studentfeedback values @name, @email, @contact, @company",con);

cmd.Parameters.Add("@name", SqlDbType.NVarChar).Value = TextBox1.Text;

cmd.Parameters.Add("@name", SqlDbType.NVarChar).Value = TextBox1.Text;

cmd.Parameters.Add("@name", SqlDbType.NVarChar).Value = TextBox1.Text;

cmd.Parameters.Add("@name", SqlDbType.NVarChar).Value = TextBox1.Text;

if(Convert.ToBoolean(cmd.ExecuteNonQuery()))

{

Response.Write("<script>alert('Data Successfully Inserted')</script>");

}

}

catch (Exception exp)

{

Response.Write("<script>alert('" + exp.Message + "')</script>");

}

finally

{

con.Close();

}

}

}