C# WebBrowser如何清除缓存？

2010-02-26 01:28:30 3k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

微前端实战：MicroApp内存泄漏优化策略与性能调优本文分享了在大型后台管理系统微前端化过程中，使用MicroApp框架时遇到的内存泄漏实战问题与优化策略。通过深入分析沙箱机制，提出动态加载、精准卸载、沙箱配置优化及第三方库补丁等核心方案，并结合Vue/React子应用专项检查清单，有效解决了内存占用飙升问题，为微前端架构的性能调优提供了系统性解决方案。阅读详情

Microsoft Visual Studio 2005 中的webbrowser浏览器为什么当一个账户登录成功后，却再也不能回到登录页面，总是显示登录成功的页面，除非关掉进程，我反复试过，好像是程序把网页页面缓存住了，请问有没有好的解决办法？最好有代码示例。先谢过了。

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编译CycloneDDS和CycloneDDS-CXX踩过的坑——CMake Error at CMakeLists.txt:227 (find_package): 最近编译CycloneDDS和CycloneDDS-CXX踩了两个坑，花了不少时间。做个简单的记录，免得以后又踩到。注意：CycloneDDS-CXX编译依赖CycloneDDS，因此必须先编译CycloneDDS需要严格按照步骤进行，否则要入坑步骤如下，1先编译CycloneDDS以上步骤完成CycloneDDS的编译和安装，生成的bin include lib等位于install目录下面。阅读详情

事理

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HeraclesLiaw 2012-06-21

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调用RunDll32.exe

RunCmd("RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 8");

void RunCmd(string cmd)
{
System.Diagnostics.Process p = new System.Diagnostics.Process();
p.StartInfo.FileName = "cmd.exe";
// 关闭Shell的使用
p.StartInfo.UseShellExecute = false;
// 重定向标准输入
p.StartInfo.RedirectStandardInput = true;
// 重定向标准输出
p.StartInfo.RedirectStandardOutput = true;
//重定向错误输出
p.StartInfo.RedirectStandardError = true;
p.StartInfo.CreateNoWindow = true;
p.Start();
p.StandardInput.WriteLine(cmd);
p.StandardInput.WriteLine("exit");
}

以下是其他一些参数的说明:
//Temporary Internet Files （Internet临时文件）
//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 8
//Cookies
//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 2
//History (历史记录)
//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 1
//Form Data （表单数据）
//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 16
//Passwords (密码）
//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 32
//Delete All （全部删除）
//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 255
//Delete All - "Also delete files and settings stored by add-ons"
//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 4351

congzhongxiao_57 2011-02-26

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还没呢，我也想知道

NET_Cyberspace 2011-01-13

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我也想知道这个问题，楼主解决了没啊？

事理 2010-10-12

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webbrowser 缓存不能清除。想起他思路吧。

maole413149 2010-10-12

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#10 不行啊

事理 2010-03-08

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C# API实现，不知道行不行，共享一下，找了很久才找到的
using System;
using System.Runtime.InteropServices;

// Visual C# version of Q326201
namespace Q326201CS
{
// Class for deleting the cache.
class DeleteCache
{
// For PInvoke: Contains information about an entry in the Internet cache
[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 FILETIME LastModifiedTime;
[FieldOffset(40)] public FILETIME ExpireTime;
[FieldOffset(48)] public FILETIME LastAccessTime;
[FieldOffset(56)] public 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;
}

// For PInvoke: Initiates the enumeration of the cache groups in the Internet cache
[DllImport(@"wininet",
SetLastError=true,
CharSet=CharSet.Auto,
EntryPoint="FindFirstUrlCacheGroup",
CallingConvention=CallingConvention.StdCall)]
public static extern IntPtr FindFirstUrlCacheGroup(
int dwFlags,
int dwFilter,
IntPtr lpSearchCondition,
int dwSearchCondition,
ref long lpGroupId,
IntPtr lpReserved);

// For PInvoke: Retrieves the next cache group in a cache group enumeration
[DllImport(@"wininet",
SetLastError=true,
CharSet=CharSet.Auto,
EntryPoint="FindNextUrlCacheGroup",
CallingConvention=CallingConvention.StdCall)]
public static extern bool FindNextUrlCacheGroup(
IntPtr hFind,
ref long lpGroupId,
IntPtr lpReserved);

// For PInvoke: Releases the specified GROUPID and any associated state in the cache index file
[DllImport(@"wininet",
SetLastError=true,
CharSet=CharSet.Auto,
EntryPoint="DeleteUrlCacheGroup",
CallingConvention=CallingConvention.StdCall)]
public static extern bool DeleteUrlCacheGroup(
long GroupId,
int dwFlags,
IntPtr lpReserved);

// For PInvoke: Begins the enumeration of the Internet cache
[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);

// For PInvoke: Retrieves the next entry in the Internet cache
[DllImport(@"wininet",
SetLastError=true,
CharSet=CharSet.Auto,
EntryPoint="FindNextUrlCacheEntryA",
CallingConvention=CallingConvention.StdCall)]
public static extern bool FindNextUrlCacheEntry(
IntPtr hFind,
IntPtr lpNextCacheEntryInfo,
ref int lpdwNextCacheEntryInfoBufferSize);

// For PInvoke: Removes the file that is associated with the source name from the cache, if the file exists
[DllImport(@"wininet",
SetLastError=true,
CharSet=CharSet.Auto,
EntryPoint="DeleteUrlCacheEntryA",
CallingConvention=CallingConvention.StdCall)]
public static extern bool DeleteUrlCacheEntry(
IntPtr lpszUrlName);

[STAThread]
static void Main(string[] args)
{
// Indicates that all of the cache groups in the user's system should be enumerated
const int CACHEGROUP_SEARCH_ALL = 0x0;
// Indicates that all the cache entries that are associated with the cache group
// should be deleted, unless the entry belongs to another cache group.
const int CACHEGROUP_FLAG_FLUSHURL_ONDELETE = 0x2;
// File not found.
const int ERROR_FILE_NOT_FOUND = 0x2;
// No more items have been found.
const int ERROR_NO_MORE_ITEMS = 259;
// Pointer to a GROUPID variable
long groupId = 0;

// Local variables
int cacheEntryInfoBufferSizeInitial = 0;
int cacheEntryInfoBufferSize = 0;
IntPtr cacheEntryInfoBuffer = IntPtr.Zero;
INTERNET_CACHE_ENTRY_INFOA internetCacheEntry;
IntPtr enumHandle = IntPtr.Zero;
bool returnValue = false;

// Delete the groups first.
// Groups may not always exist on the system.
// For more information, visit the following Microsoft Web site:
// http://msdn.microsoft.com/library/?url=/workshop/networking/wininet/overview/cache.asp
// By default, a URL does not belong to any group. Therefore, that cache may become
// empty even when the CacheGroup APIs are not used because the existing URL does not belong to any group.
enumHandle = FindFirstUrlCacheGroup(0, CACHEGROUP_SEARCH_ALL, IntPtr.Zero, 0, ref groupId, IntPtr.Zero);
// If there are no items in the Cache, you are finished.
if (enumHandle != IntPtr.Zero && ERROR_NO_MORE_ITEMS == Marshal.GetLastWin32Error())
return;

// Loop through Cache Group, and then delete entries.
while(true)
{
// Delete a particular Cache Group.
returnValue = DeleteUrlCacheGroup(groupId, CACHEGROUP_FLAG_FLUSHURL_ONDELETE, IntPtr.Zero);
if (!returnValue && ERROR_FILE_NOT_FOUND == Marshal.GetLastWin32Error())
{
returnValue = FindNextUrlCacheGroup(enumHandle, ref groupId, IntPtr.Zero);
}

if (!returnValue && (ERROR_NO_MORE_ITEMS == Marshal.GetLastWin32Error() || ERROR_FILE_NOT_FOUND == Marshal.GetLastWin32Error()))
break;
}

// 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));

cacheEntryInfoBufferSizeInitial = cacheEntryInfoBufferSize;
returnValue = DeleteUrlCacheEntry(internetCacheEntry.lpszSourceUrlName);
if (!returnValue)
{
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);
}
}
}

事理 2010-02-26

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试过，不行啊。。。。。

kid_wang 2010-02-26

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你清一下Cookie不行吗？在你new一个的同时。

事理 2010-02-26

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怎么注销？我重新new 一个新的webbrowser都不行。

jin20000 2010-02-26

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注销也不错,回复内容太短了！

事理 2010-02-26

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能再详细点吗？这个我看不懂啊。

wuyq11 2010-02-26

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InternetSetCookieA(
IN LPCSTR lpszUrl,
IN LPCSTR lpszCookieName,
IN LPCSTR lpszCookieData
);

事理 2010-02-26

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那怎样是登录信息不写入Cookie呢？

事理 2010-02-26

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但是程序有写入Cookie啊

卧_槽 2010-02-26

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这个，你没把登录信息写入cookice就不会啊。

C# WebBrowser如何清除缓存？

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