我从数据源获得错误，请验证这一点

问题描述

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;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    SqlConnection con = new SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename="C:\Users\SONY\Documents\Visual Studio 2010\WebSites\WebSite9\App_Data\Student.mdf";Integrated Security=True;User Instance=True");
        SqlCommand cmd;
    protected void Button1_Click(object sender, EventArgs e)
    {
        con.Open();
        cmd = new SqlCommand("insert into Student values('"+TextBox1 .Text +"','"+TextBox2 .Text +"',)", con);
        cmd.ExecuteNonQuery();


    }
}

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