笔记8：winfrom连接数据库DBHelp

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Data.Sql;
 6 using System.Data.SqlClient;
 7 using System.Data;
 8 
 9 namespace 库存管理系统
10 {
11     class DBHelf
12     {
13         //增删改
14         public int sqlDS(String sql)
15         {
16             string Conn = "server=.;integrated security=true;database=GoodsManager";
17             SqlConnection sqlconn = new SqlConnection(Conn);
18             SqlCommand sqlcomm = new SqlCommand(sql, sqlconn);
19 
20             sqlconn.Open();
21             int i = sqlcomm.ExecuteNonQuery();
22             sqlconn.Close();
23             return i;
24         }
25         //查询
26         public DataTable sqlCha(string sql)
27         {
28             DataTable table = new DataTable();
29             string Conn = "server=.;integrated security=true;database=GoodsManager";
30             SqlConnection sqlconn = new SqlConnection(Conn);
31             SqlCommand sqlcomm = new SqlCommand(sql, sqlconn);
32 
33             SqlDataAdapter da = new SqlDataAdapter(sqlcomm);
34             da.Fill(table);
35             return table;
36         }
37     }
38 }