C#清除WebBrowser中Cookie缓存的方法

时间:2022-04-11 03:09:48

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*上找到一段可用的代码:

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
[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。