小编Vit*_*lho的帖子

我有这个问题,视觉工作室不显示任何类型的错误,但当我尝试保存数据,我去检查我的数据库,它是空的,不知道错误在哪里,请帮助不多

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;
using System.IO;
using System.Runtime.InteropServices;


namespace PAPA
{
    public partial class Form11 : Form
    {
        SqlConnection cn = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=E:\Documents\basededadospap.mdf;Integrated Security=True;Connect Timeout=30");
        SqlCommand cmd = new SqlCommand();

        public Form11()
        {
            InitializeComponent();
        }
        void Fillcombo() {
        }
        private void button1_Click(object sender, EventArgs e)
        {

            if (textBox1.Text != "" & textBox2.Text != "" & textBox3.Text != "" & textBox4.Text …