我在WPF应用程序中使用WebBrowser控件，我希望从代码中清除IE cookie缓存。
我试图使用以下代码
string[] Cookies = System.IO.Directory.GetFiles(Environment.GetFolderPath(Environment.SpecialFolder.Cookies));
foreach (string currentFile in Cookies)
{
try
{
System.IO.File.Delete(currentFile);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
这会从指定的文件夹中删除文件，但是当我使用WebBrowser控件向后导航时，cookie会重新出现，就好像它们从未被删除一样。
这可能是正确的结果，因为我假设Environment.SpecialFolder.Cookies文件夹位于AppData中，这是用户最新的当前快照。
如果我打开IE，并对cookie和缓存进行硬删除，我会在我的应用程序中获得预期的输出。
有没有办法在代码中执行此操作？
答案 0 :(得分：3)
Microsoft KB文章将帮助您更好地清除整个缓存。
但是，您也可以尝试以下解决方案。
string[] InterNetCache = System.IO.Directory.GetFiles(Environment.GetFolderPath(Environment.SpecialFolder.InternetCache));
答案 1 :(得分：1)
使用以下功能可以删除特定主机名的cookie。如果需要清除整个缓存，则调整＆＃34; if（sourceUrlName.Contains（hostEntry）＆amp;＆amp; sourceUrlName.ToLower（）。包含（＆＃34; cookie＆＃34;）） ＆＃34; 应该删除。
/// <summary>
/// Internets the set cookie.
/// </summary>
/// <param name="lpszUrlName">Name of the LPSZ URL.</param>
/// <param name="lpszCookieName">Name of the LPSZ cookie.</param>
/// <param name="lpszCookieData">The LPSZ cookie data.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
[DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern bool InternetSetCookie(string lpszUrlName, string lpszCookieName, string lpszCookieData);
/// <summary>
/// Internets the get cookie.
/// </summary>
/// <param name="lpszUrl">The LPSZ URL.</param>
/// <param name="lpszCookieName">Name of the LPSZ cookie.</param>
/// <param name="lpszCookieData">The LPSZ cookie data.</param>
/// <param name="lpdwSize">Size of the LPDW.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
[DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern bool InternetGetCookie(string lpszUrl, string lpszCookieName, StringBuilder lpszCookieData, ref int lpdwSize);
/// <summary>
/// Finds the first URL cache entry.
/// </summary>
/// <param name="lpszUrlSearchPattern">The LPSZ URL search pattern.</param>
/// <param name="lpFirstCacheEntryInfo">The lp first cache entry info.</param>
/// <param name="lpdwFirstCacheEntryInfoBufferSize">Size of the LPDW first cache entry info buffer.</param>
/// <returns>IntPtr.</returns>
[DllImport(@"wininet",
SetLastError = true,
CharSet = CharSet.Auto,
EntryPoint = "FindFirstUrlCacheEntryA",
CallingConvention = CallingConvention.StdCall)]
public static extern IntPtr FindFirstUrlCacheEntry(
[MarshalAs(UnmanagedType.LPTStr)] string lpszUrlSearchPattern,
IntPtr lpFirstCacheEntryInfo,
ref int lpdwFirstCacheEntryInfoBufferSize);
/// <summary>
/// Finds the next URL cache entry.
/// </summary>
/// <param name="hFind">The h find.</param>
/// <param name="lpNextCacheEntryInfo">The lp next cache entry info.</param>
/// <param name="lpdwNextCacheEntryInfoBufferSize">Size of the LPDW next cache entry info buffer.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
[DllImport(@"wininet",
SetLastError = true,
CharSet = CharSet.Auto,
EntryPoint = "FindNextUrlCacheEntryA",
CallingConvention = CallingConvention.StdCall)]
public static extern bool FindNextUrlCacheEntry(
IntPtr hFind,
IntPtr lpNextCacheEntryInfo,
ref int lpdwNextCacheEntryInfoBufferSize);
/// <summary>
/// Deletes the URL cache entry.
/// </summary>
/// <param name="lpszUrlName">Name of the LPSZ URL.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
[DllImport(@"wininet",
SetLastError = true,
CharSet = CharSet.Auto,
EntryPoint = "DeleteUrlCacheEntryA",
CallingConvention = CallingConvention.StdCall)]
public static extern bool DeleteUrlCacheEntry(
IntPtr lpszUrlName);
/// <summary>
/// Clears the IE cache.
/// </summary>
/// <param name="url">The URL.</param>
public static void ClearIECache(string url)
{
try
{
// No more items have been found.
const int ERROR_NO_MORE_ITEMS = 259;
string hostEntry = new Uri(url).Host;
// Local variables
int cacheEntryInfoBufferSizeInitial = 0;
int cacheEntryInfoBufferSize = 0;
IntPtr cacheEntryInfoBuffer = IntPtr.Zero;
INTERNET_CACHE_ENTRY_INFOA internetCacheEntry;
IntPtr enumHandle = IntPtr.Zero;
bool returnValue = false;
// Start to delete URLs that do not belong to any group.
enumHandle = FindFirstUrlCacheEntry(null, IntPtr.Zero, ref cacheEntryInfoBufferSizeInitial);
if (enumHandle == IntPtr.Zero && ERROR_NO_MORE_ITEMS == Marshal.GetLastWin32Error())
return;
cacheEntryInfoBufferSize = cacheEntryInfoBufferSizeInitial;
cacheEntryInfoBuffer = Marshal.AllocHGlobal(cacheEntryInfoBufferSize);
enumHandle = FindFirstUrlCacheEntry(null, cacheEntryInfoBuffer, ref cacheEntryInfoBufferSizeInitial);
while (true)
{
internetCacheEntry = (INTERNET_CACHE_ENTRY_INFOA)Marshal.PtrToStructure(cacheEntryInfoBuffer, typeof(INTERNET_CACHE_ENTRY_INFOA));
string sourceUrlName = Marshal.PtrToStringAnsi(internetCacheEntry.lpszSourceUrlName);
cacheEntryInfoBufferSizeInitial = cacheEntryInfoBufferSize;
if (sourceUrlName.Contains(hostEntry) && sourceUrlName.ToLower().Contains("cookie"))
{
DeleteUrlCacheEntry(internetCacheEntry.lpszSourceUrlName);
}
returnValue = FindNextUrlCacheEntry(enumHandle, cacheEntryInfoBuffer, ref cacheEntryInfoBufferSizeInitial);
if (!returnValue && ERROR_NO_MORE_ITEMS == Marshal.GetLastWin32Error())
{
break;
}
if (!returnValue && cacheEntryInfoBufferSizeInitial > cacheEntryInfoBufferSize)
{
cacheEntryInfoBufferSize = cacheEntryInfoBufferSizeInitial;
cacheEntryInfoBuffer = Marshal.ReAllocHGlobal(cacheEntryInfoBuffer, (IntPtr)cacheEntryInfoBufferSize);
returnValue = FindNextUrlCacheEntry(enumHandle, cacheEntryInfoBuffer, ref cacheEntryInfoBufferSizeInitial);
}
}
Marshal.FreeHGlobal(cacheEntryInfoBuffer);
}
catch
{
//error
}
}
/// <summary>
/// Struct INTERNET_CACHE_ENTRY_INFOA
/// </summary>
[StructLayout(LayoutKind.Explicit, Size = 80)]
public struct INTERNET_CACHE_ENTRY_INFOA
{
[FieldOffset(0)]
public uint dwStructSize;
[FieldOffset(4)]
public IntPtr lpszSourceUrlName;
[FieldOffset(8)]
public IntPtr lpszLocalFileName;
[FieldOffset(12)]
public uint CacheEntryType;
[FieldOffset(16)]
public uint dwUseCount;
[FieldOffset(20)]
public uint dwHitRate;
[FieldOffset(24)]
public uint dwSizeLow;
[FieldOffset(28)]
public uint dwSizeHigh;
[FieldOffset(32)]
public System.Runtime.InteropServices.ComTypes.FILETIME LastModifiedTime;
[FieldOffset(40)]
public System.Runtime.InteropServices.ComTypes.FILETIME ExpireTime;
[FieldOffset(48)]
public System.Runtime.InteropServices.ComTypes.FILETIME LastAccessTime;
[FieldOffset(56)]
public System.Runtime.InteropServices.ComTypes.FILETIME LastSyncTime;
[FieldOffset(64)]
public IntPtr lpHeaderInfo;
[FieldOffset(68)]
public uint dwHeaderInfoSize;
[FieldOffset(72)]
public IntPtr lpszFileExtension;
[FieldOffset(76)]
public uint dwReserved;
[FieldOffset(76)]
public uint dwExemptDelta;
}