怎样引用类中非静态的方法

Posted 2020-08-19 守夜人1

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Data;
 4 using System.Data.SqlClient;
 5 using System.Linq;
 6 using System.Text;
 7 using System.Threading.Tasks;
 8 
 9 namespace ConsoleApplication3
10 {
11     class Program
12     {
13         //非静态方法
14         public SqlConnection createSqlConnection()
15         {
16             //数据库连接字符串
17             string sql = "Data Source = localhost;DataBase=db_MyDemo;User Id=sa;Password=123456";
18             SqlConnection con = new SqlConnection(sql);
19             con.Open();
20             return con;
21         }
22 
23         //静态方法
24         public static int InsertAll()
25         {
26             //拼接sql语句
27             StringBuilder strSQL = new StringBuilder();
28             strSQL.Append("insert into tb_SelCustomer ");
29             strSQL.Append("values(");
30             strSQL.Append("‘liuhao‘,‘0‘,‘0‘,‘13822223333‘,‘[email protected]‘,‘广东省深圳市宝安区‘,12.234556,34.222234,‘422900‘,‘备注信息‘)");
31             Console.WriteLine("Output SQL:\n{0}", strSQL.ToString());
32             //创建Command对象
33             SqlCommand cmd = new SqlCommand();
34 
35             //静态方法调用非静态方法
36             cmd.Connection =new Program().createSqlConnection();
37             cmd.CommandType = CommandType.Text;
38             cmd.CommandText = strSQL.ToString();
39             int rows = cmd.ExecuteNonQuery();
40             return rows;
41         }
42 
43         static void Main(string[] args)
44         {
45             try
46             {
47                 Console.WriteLine("受影响的行数为: {0}", InsertAll());
48             }
49             catch (Exception ex)
50             {
51                 Console.WriteLine("\nError：\n{0}", ex.Message);
52             }
53             Console.Read();
54         }
55 
56     }
57 }