//判断计算机是否能够连接到Internet的API //wininet.dll是Windows应用程序网络相关模块。该文件隶属于%WINDOWSSYSTEM32目录下动态库连接文件。该文件不可缺失,属于关键链接库。当文件丢失或者损坏时,届时将无法完成Explorer进程(即桌面以及基于该进程的IE浏览器等,可使用不基于IE浏览器进行访问网络) [DllImport("wininet.dll")] public extern static bool InternetGetConnectedState( outint Description, int ReservedValue ) ; //创建一个调用API函数(封装为C#方式). ///<summary> /// 查看网络是否连接到公网 ///</summary> ///<returns>返回Ture:可以连接到Internet,False则连接不上</returns> public static bool IsConnectedToInternet( ) { int Desc ; return InternetGetConnectedState(out Desc, 0); }
第二种设置永久cookie
using System; using System.Text; using System.Runtime.InteropServices; namespace ConsoleApplication1 { class Program { /// <summary> /// 设置cookie /// </summary> [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern bool InternetSetCookie(string lpszUrlName, string lbszCookieName, string lpszCookieData); /// <summary> /// 获取cookie /// </summary> [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern bool InternetGetCookie( string url, string name, StringBuilder data, ref int dataSize); static void Main(string[] args) { //获取旧的 StringBuilder cookie = new StringBuilder(new String(' ',2048)); int datasize = cookie.Length; bool b= InternetGetCookie("http://community.csdn.net", null, cookie, ref datasize); //删除旧的 foreach (string fileName in System.IO.Directory.GetFiles(System.Environment.GetFolderPath(Environment.SpecialFolder.Cookies))) { if (fileName.ToLower().IndexOf("csdn") > 0) { System.IO.File.Delete("csdn"); } } //生成新的 foreach (string c in cookie.ToString().Split(';')) { string[] item = c.Split('='); string name = item[0]; string value = item[1] + ";expires=Sun,22-Feb-2099 00:00:00 GMT"; InternetSetCookie("http://community.csdn.net",name,value); InternetSetCookie("http://forum.csdn.net", name, value); InternetSetCookie("http://webim.csdn.net", name, value); } } } }
若要免登录可以调用 免登录
Process.Start("iexplore.exe", LinkAddress.CookiesFind);