";使用名称空间“;DNS和AddressFamily上的问题
本文关键字:DNS AddressFamily 问题 空间 quot | 更新日期: 2023-09-27 18:19:48
我是C#的新手,通常我的强项是C++和VB。我有两个问题,我对代码发表了评论:
1.)蓝色波浪线出现在3上使用它表示"using namespace指令只能应用于命名空间;'System.Object"…"
2.)我无法从我声明为public的变量LocalIP中获得输出IP地址。
提前谢谢。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
//Blue squiggly line appear on this 2 Uses
using Dns = System.Net.Dns;
using AddressFamily = System.Net.Sockets.AddressFamily;
namespace WindowsFormsApplication1
{
public partial class frm_Log : Form
{
public String localIP;
public string LocalIPAddress()
{
IPHostEntry host;
//string localIP = "";
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
localIP = ip.ToString();
break;
}
}
return localIP;
}
....
....
// variable localIP.Trim() does not giveout any output
MyValue="LogAccept,"+this.txt_UserName.Text.Trim()+","+this.txt_Password.Text.Trim() + "," + localIP.Trim() ;
....
....
System.Object
是一个类。System
是名称空间,您已经将其定义为文件顶部的第一个using
。
http://msdn.microsoft.com/en-US/library/sf0df423aspx建议使用以下语法:
using Dns = System.Net.Dns;
使用(using System.Linq;
)的标准版本只能针对命名空间,而不能针对命名空间中的类。不过,如果您已经导入了整个命名空间,则不需要专门导入其中的任何内容
原始代码为
using System
....
using System.Object;
using System.Net.Dns;
using System.Net.Sockets.AddressFamily;
....
分辨率
//using System.Object --> since uses system already defined.
using Dns = System.Net.Dns;
using AddressFamily = System.Net.Sockets.AddressFamily;