如何使用不使用JS或jQuery的C#清除特定站点的IE缓存

Question

我想使用 C# 清除站点的 IE 缓存。我有一个使用Web浏览器控件登录到特定站点的Windows应用程序。但是，我没有使用我的程序存储任何缓存，IE默认这样做。 我试图理解

https://msdn.microsoft.com/en-us/library/windows/desktop/aa384026(v=vs.85(.aspx https://msdn.microsoft.com/en-us/library/windows/desktop/aa384049(v=vs.85(.aspx https://msdn.microsoft.com/en-us/library/windows/desktop/aa383983(v=vs.85(.aspx

但我找不到解决方案。

Answer 1

你可以用我的类来清除IE缓存

public static class WebBrowserHelper
{
#region WINAPI        
[DllImport("wininet",  EntryPoint = "DeleteUrlCacheEntryA",  SetLastError = true)]
public static extern bool DeleteUrlCacheEntry(IntPtr lpszUrlName);
[DllImport("wininet", SetLastError = true)]
public static extern bool DeleteUrlCacheGroup(long GroupId, int dwFlags, IntPtr lpReserved);
[DllImport("wininet",  EntryPoint = "FindFirstUrlCacheEntryA",  SetLastError = true)]
public static extern IntPtr FindFirstUrlCacheEntry(string lpszUrlSearchPattern, IntPtr lpFirstCacheEntryInfo, ref int lpdwFirstCacheEntryInfoBufferSize);
[DllImport("wininet",  SetLastError = true)]
public static extern IntPtr FindFirstUrlCacheGroup(int dwFlags, int dwFilter, IntPtr lpSearchCondition, int dwSearchCondition, ref long lpGroupId, IntPtr lpReserved);
[DllImport("wininet", EntryPoint = "FindNextUrlCacheEntryA",  SetLastError = true)]
public static extern bool FindNextUrlCacheEntry(IntPtr hFind, IntPtr lpNextCacheEntryInfo, ref int lpdwNextCacheEntryInfoBufferSize);
[DllImport("wininet",  SetLastError = true)]
public static extern bool FindNextUrlCacheGroup(IntPtr hFind, ref long lpGroupId, IntPtr lpReserved);
#endregion
[StructLayout(LayoutKind.Explicit)]
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;
}
public static void ClearCache()
{
bool flag;
bool flag1;
long num = (long)0;
int num1 = 0;
int num2 = 0;
IntPtr zero = IntPtr.Zero;
IntPtr intPtr = IntPtr.Zero;
bool flag2 = false;
intPtr = FindFirstUrlCacheGroup(0, 0, IntPtr.Zero, 0, ref num, IntPtr.Zero);
if ((intPtr == IntPtr.Zero ? true : 259 != Marshal.GetLastWin32Error()))
{
while (true)
{
flag = true;
if ((259 == Marshal.GetLastWin32Error() ? false : 2 != Marshal.GetLastWin32Error()))
{
flag2 = DeleteUrlCacheGroup(num, 2, IntPtr.Zero);
if ((flag2 ? false : 2 == Marshal.GetLastWin32Error()))
{
flag2 = FindNextUrlCacheGroup(intPtr, ref num, IntPtr.Zero);
}
if (flag2)
{
flag1 = true;
}
else
{
flag1 = (259 == Marshal.GetLastWin32Error() ? false : 2 != Marshal.GetLastWin32Error());
}
if (!flag1)
{
break;
}
}
else
{
break;
}
}
intPtr = FindFirstUrlCacheEntry(null, IntPtr.Zero, ref num1);
if ((intPtr == IntPtr.Zero ? true : 259 != Marshal.GetLastWin32Error()))
{
num2 = num1;
zero = Marshal.AllocHGlobal(num2);
intPtr = FindFirstUrlCacheEntry(null, zero, ref num1);
while (true)
{
flag = true;
INTERNET_CACHE_ENTRY_INFOA structure = (INTERNET_CACHE_ENTRY_INFOA)Marshal.PtrToStructure(zero, typeof(INTERNET_CACHE_ENTRY_INFOA));
if (259 != Marshal.GetLastWin32Error())
{
num1 = num2;
flag2 = DeleteUrlCacheEntry(structure.lpszSourceUrlName);
if (!flag2)
{
flag2 = FindNextUrlCacheEntry(intPtr, zero, ref num1);
}
if (!(flag2 ? true : 259 != Marshal.GetLastWin32Error()))
{
break;
}
else if ((flag2 ? false : num1 > num2))
{
num2 = num1;
zero = Marshal.ReAllocHGlobal(zero, (IntPtr)num2);
flag2 = FindNextUrlCacheEntry(intPtr, zero, ref num1);
}
}
else
{
break;
}
}
Marshal.FreeHGlobal(zero);
}
}
}
}