猿创征文｜C#基础——DBHelper

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.Data.SqlClient;
namespace CShapDBHelper
{
    public class DBHelper
    {
        private static string url = "server=.;database=girl1804;uid=sa;pwd=root";
        /// <summary>
        /// 获取查询信息
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public static DataTable Query(string sql) {
            SqlConnection conn = new SqlConnection(url);
            SqlDataAdapter sdap = new SqlDataAdapter(sql, conn);
            DataSet ds = new DataSet();
            sdap.Fill(ds);
            return ds.Tables[0];
        }
        /// <summary>
        /// 增删改
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public static int ExecuteNonQuery(string sql) {
            SqlConnection conn = new SqlConnection(url);
            conn.Open();
            SqlCommand cmd = new SqlCommand(sql,conn);
            int rows = cmd.ExecuteNonQuery();
            conn.Close();
            return rows;
        }
    }
}