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1 using System;
2 using System.Collections.Generic; 3 using System.Text; 4 //方法一 5 using System.Runtime; 6 using System.Runtime.InteropServices; 7 //方法二 Net2.0新增类库 8 using System.Net.NetworkInformation; 9 10 namespace InternetCheck 11 { 12 public class Internet 13 { 14 [DllImport("wininet.dll")] 15 private extern static bool InternetGetConnectedState(int Description, int ReservedValue); 16 17 #region 方法一 18 /// <summary> 19 /// 用于检查网络是否可以连接互联网,true表示连接成功,false表示连接失败 20 /// </summary> 21 /// <returns></returns> 22 public static bool IsConnectInternet() 23 { 24 int Description = 0; 25 return InternetGetConnectedState(Description, 0); 26 } 27 #endregion 28 29 #region 方法二 30 /// <summary> 31 /// 用于检查IP地址或域名是否可以使用TCP/IP协议访问(使用Ping命令),true表示Ping成功,false表示Ping失败 32 /// </summary> 33 /// <param name="strIpOrDName">输入参数,表示IP地址或域名</param> 34 /// <returns></returns> 35 public static bool PingIpOrDomainName(string strIpOrDName) 36 { 37 try 38 { 39 Ping objPingSender = new Ping(); 40 PingOptions objPinOptions = new PingOptions(); 41 objPinOptions.DontFragment = true; 42 string data = ""; 43 byte[] buffer = Encoding.UTF8.GetBytes(data); 44 int intTimeout = 120; 45 PingReply objPinReply = objPingSender.Send(strIpOrDName, intTimeout, buffer, objPinOptions); 46 string strInfo = objPinReply.Status.ToString(); 47 if (strInfo == "Success") 48 { 49 return true; 50 } 51 else 52 { 53 return false; 54 } 55 } 56 catch (Exception) 57 { 58 return false; 59 } 60 } 61 #endregion 62 } 63 } 64 using System; 65 using System.Collections.Generic; 66 using System.Text; 67 //方法一 68 using System.Runtime; 69 using System.Runtime.InteropServices; 70 //方法二 Net2.0新增类库 71 using System.Net.NetworkInformation; 72 73 namespace InternetCheck 74 { 75 public class Internet 76 { 77 [DllImport("wininet.dll")] 78 private extern static bool InternetGetConnectedState(int Description, int ReservedValue); 79 80 #region 方法一 81 /// <summary> 82 /// 用于检查网络是否可以连接互联网,true表示连接成功,false表示连接失败 83 /// </summary> 84 /// <returns></returns> 85 public static bool IsConnectInternet() 86 { 87 int Description = 0; 88 return InternetGetConnectedState(Description, 0); 89 } 90 #endregion 91 92 #region 方法二 93 /// <summary> 94 /// 用于检查IP地址或域名是否可以使用TCP/IP协议访问(使用Ping命令),true表示Ping成功,false表示Ping失败 95 /// </summary> 96 /// <param name="strIpOrDName">输入参数,表示IP地址或域名</param> 97 /// <returns></returns> 98 public static bool PingIpOrDomainName(string strIpOrDName) 99 { 100 try 101 { 102 Ping objPingSender = new Ping(); 103 PingOptions objPinOptions = new PingOptions(); 104 objPinOptions.DontFragment = true; 105 string data = ""; 106 byte[] buffer = Encoding.UTF8.GetBytes(data); 107 int intTimeout = 120; 108 PingReply objPinReply = objPingSender.Send(strIpOrDName, intTimeout, buffer, objPinOptions); 109 string strInfo = objPinReply.Status.ToString(); 110 if (strInfo == "Success") 111 { 112 return true; 113 } 114 else 115 { 116 return false; 117 } 118 } 119 catch (Exception) 120 { 121 return false; 122 } 123 } 124 #endregion 125 } 126 } 127 128 129 // 本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/yhrch/archive/2007/11/05/1867546.aspx |
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