SqlCommand cmd = new SqlCommand("select * from admin", conn); int count= cmd.ExecuteNonQuery();
i的值总是返回-1,查询是不会影响数据库的,所以总是返回-1值,只有进行了update,delete,insert操作以后才会影响数据库,其返回值才不是-1,-1代表有异常出现.
Powered by: 博客园 Copyright © 2024 jason618 Powered by .NET 8.0 on Kubernetes