c# 读取网络状态(多种情况)

原创于 2011-05-30 17:11:00 发布 · 1.2k 阅读

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#c# #网络 #authentication #string #null

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本文介绍了一种使用C#检查网络连接状态的方法，通过System.Management来获取Win32_NetworkAdapter信息，根据NetConnectionStatus属性判断网络是否连接、连接状态等。包括断开、连接中、已连接、断开中、硬件未检测到、硬件禁用、故障、媒体断开、认证中、认证成功和认证失败等多种情况。

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需要引入 System.Management .

public string NetStatus() { ManagementObjectCollection objects; string status = ""; ManagementObjectSearcher searcher = new ManagementObjectSearcher(); searcher.Query.QueryString = "Select * From Win32_NetworkAdapter "; objects = searcher.Get(); foreach (ManagementObject obj in objects) { foreach (PropertyData p in obj.Properties) { if (p.Name.Equals("NetConnectionStatus")) { if (p.Value != null) { status = p.Value.ToString(); } } } } switch (status) { case "0": return "Disconnected"; case "1": return "Connecting ..."; case "2": return "Connected"; case "3": return "Disconnecting ..."; case "4": return "Hardware not present"; case "5": return "Hardware disabled"; case "6": return "Hardware malfunction"; case "7": return "Media disconnected"; case "8": return "Authenticating"; case "9": return "Authentication succeeded"; case "10": return "Authentication failed"; default: return ""; } }