命名空间“”已经包含了“DB”的定义
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Data.SqlClient;
/// <summary>
///DB 的摘要说明
/// </summary>
public class DB
{
public DB()
{
//
//TODO: 在此处添加构造函数逻辑
//
}
public static SqlConnection Createconnection()
{
SqlConnection con = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["strconn"].ToString());
con.Open();
return con;
}
}
错误提示:
命名空间“<global namespace>”已经包含了“DB”的定义
App_code里的文件一般不会有错,可还是错了,怎么回事