c# 从零到精通 读取连接数据库-并执行sql语句插入一行值

c# 从零到精通 读取连接数据库-并执行sql语句插入一行值
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace Test11
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

    private void Form1_Load(object sender, EventArgs e)
    {

    }

    private void button1_Click(object sender, EventArgs e)
    {
        ClsDB.ClsDBControl DBC = new Test11.ClsDB.ClsDBControl();
        string strSql = "insert into tb_people values('" + this.textBox1.Text.Trim().ToString() + "','" +
        this.textBox2.Text.Trim().ToString() + "','" + this.textBox3.Text.Trim().ToString() + "')";
        if (DBC.insertDB(strSql))
        {
            MessageBox.Show("OK");
        }
    }
}

}