C#清除WebBrowser中Cookie缓存的方法

本文实例讲述了C#清除WebBrowser中Cookie缓存的方法。分享给大家供大家参考，具体如下：

最近用C#写一个程序，用一个窗体中的WebBrowser来登陆网站，但是WebBrowser有cookie缓存，第二次登陆的时候WebBrowser仍然是第一次登陆后的状态，所以要清除WebBrowser的cookie缓存。

在stackoverflow上找到一段可用的代码：

[DllImport("wininet.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto, SetLastError = true)]
public static extern bool InternetSetOption(int hInternet, int dwOption, IntPtr lpBuffer, int dwBufferLength);
private unsafe void SuppressWininetBehavior()
{
 /* SOURCE: http://msdn.microsoft.com/en-us/library/windows/desktop/aa385328％28v=vs.85％29.aspx
 * INTERNET_OPTION_SUPPRESS_BEHAVIOR (81):
 *   A general purpose option that is used to suppress behaviors on a process-wide basis.
 *   The lpBuffer parameter of the function must be a pointer to a DWORD containing the specific behavior to suppress.
 *   This option cannot be queried with InternetQueryOption.
 *  
 * INTERNET_SUPPRESS_COOKIE_PERSIST (3):
 *   Suppresses the persistence of cookies, even if the server has specified them as persistent.
 *   Version: Requires Internet Explorer 8.0 or later.
 */
 int option = (int)3/* INTERNET_SUPPRESS_COOKIE_PERSIST*/;
 int* optionPtr = &option;
 bool success = InternetSetOption(0, 81/*INTERNET_OPTION_SUPPRESS_BEHAVIOR*/, new IntPtr(optionPtr), sizeof(int));
 if (!success)
 {
   MessageBox.Show("Something went wrong !>?");
 }
}

希望本文所述对大家C#程序设计有所帮助。