C#中把调用数据库的命令写在SqlHelper类中,编译后把exe文件复制到桌面运行就出错,命令是这样的:private static string connStr = System.Configuration.ConfigurationManager.ConnectionStrings["MdiManipulate.Properties.Settings.StudentRecordConnectionString"].ConnectionString;
可是如果把数据库连接字符串这样写:private static string connStr = "Data Source=.;Initial Catalog=studentrecord;Integrated Security=True";就没问题,请问这是为什么呀,请大神们帮帮忙,谢谢!