vs2010连接暑数据库问题

Question

代码如下，问题在代码后
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Data.Common;
using System.Configuration;

namespace sqlconnection
{
public partial class Form1 : Form
{
SqlConnection con = new SqlConnection("server=.\sqlexpress;integrated security=true;database=master;");
SqlCommand cmd;
SqlDataReader sqldr;
public Form1()
{
InitializeComponent();
con.Open();
}

    private void button1_Click(object sender, EventArgs e)
    {
        try
        {
            cmd = new SqlCommand("SELECT*FROM [table1]", con);
            sqldr = cmd.ExecuteReader();
            label1.Text = "";
            while (sqldr.Read())
            {
                label1.Text = label1.Text + String.Format("{0}{1}{2}", sqldr[0], sqldr[1],sqldr[2]);
            }
        }
        catch (Exception ex)
        {
            label1.Text = ex.Message;

        }

    }

    private void button2_Click(object sender, EventArgs e)
    {
        SqlCommand cmd_add = new SqlCommand("",con);
        cmd_add.CommandText = "insret into [table1](序号,名称,型号,原价,售价) values(@序号,@名称,@型号,@原价,@售价)";
        cmd_add.Parameters.AddWithValue("@序号", "3");
        cmd_add.Parameters.AddWithValue("@名称", "pc主机");
        cmd_add.Parameters.AddWithValue("@型号", "del9898");
        cmd_add.Parameters.AddWithValue("@原价", "3300");
        cmd_add.Parameters.AddWithValue("@售价", "3500");
        int ret = cmd_add.ExecuteNonQuery();
        label2.Text = "add successfull";
    }
}

}
这是两个按钮和两个label，button1能把我数据库table1中的信息查出来，但是button2按了就是显示说into附近有语法错误

Answer 1

insert

你写错了。