我正在尝试编写代码来提取CAB文件的内容，但是我在使用SetupIterateCabinet例程时遇到了问题。
请在此处查看文档http://msdn.microsoft.com/en-us/library/aa377404(v=vs.85).aspx
我可以像这样正确导入
private const uint SPFILENOTIFY_CABINETINFO = 0x00000010;
private const uint SPFILENOTIFY_FILEINCABINET = 0x00000011;
private const uint SPFILENOTIFY_NEEDNEWCABINET = 0x00000012;
private const uint SPFILENOTIFY_FILEEXTRACTED = 0x00000013;
private const uint SPFILENOTIFY_FILEOPDELAYED = 0x00000014;
private const uint NO_ERROR = 0;
private const uint FILEOP_ABORT = 0;
private const uint FILEOP_DOIT= 1;
private const uint FILEOP_SKIP= 2;
private const uint FILEOP_NEWPATH= 4;
static void Main(string[] args)
{
SetupIterateCabinet("c:\\SomeCab.cab", 0, new PSP_FILE_CALLBACK(CallBack), 0);
Console.ReadKey();
}
[DllImport("SetupApi.dll", CharSet = CharSet.Auto)]
public static extern bool SetupIterateCabinet(string cabinetFile,
uint reserved, PSP_FILE_CALLBACK callBack, uint context);
public delegate uint PSP_FILE_CALLBACK(uint context, uint notification,
IntPtr param1, IntPtr param2);
private static uint CallBack(uint context, uint notification, IntPtr param1,
IntPtr param2)
{
uint rtnValue = NO_ERROR;
switch (notification)
{
case SPFILENOTIFY_FILEINCABINET:
rtnValue = OnFileFound(context, notification, param1, param2);
break;
case SPFILENOTIFY_FILEEXTRACTED:
rtnValue = OnFileExtractComplete(param1);
break;
case SPFILENOTIFY_NEEDNEWCABINET:
rtnValue = NO_ERROR;
break;
}
return rtnValue;
}
private static uint OnFileExtractComplete(IntPtr param1)
{
Console.WriteLine("Complete");
return FILEOP_DOIT;
}
[StructLayout(LayoutKind.Sequential)]
struct _FILE_IN_CABINET_INFO {
IntPtr NameInCabinet;
int FileSize;
int Win32Error;
int DosDate;
int DosTime;
int DosAttribs;
StringBuilder FullTargetName;
};
static private uint OnFileFound(uint context, uint notification, IntPtr param1, IntPtr param2)
{
_FILE_IN_CABINET_INFO fc = new _FILE_IN_CABINET_INFO() ;
Marshal.PtrToStructure(param1, fc);
return 1;
}
但是，在尝试处理回调中的SPFILENOTIFY_FILEINCABINET事件时会出现问题。根据文档，这是一个结构，我需要将我想要提取文件的位置放在其中。我无法弄清楚结构应该是什么样的，也许如何将param转换为结构
答案 0 :(得分：0)
我认为你的回调函数的返回值有问题。在SPFILENOTIFY_FILECABINET上，您应该返回FILEOP_DOIT。在返回之前，您应该在FILE_IN_CABINTE_INFO中设置文件名。请检查代码项目帖子http://www.codeproject.com/Articles/7165/Iterate-and-Extract-Cabinet-File 我稍后可能会添加一些代码示例。 GTG现在
编辑：
下面的代码示例。我没试过，但我相信它应该有效。我试图保持结构类似于你的代码。这应该向您展示如何定义FILE_IN_CABINET_INFO类以及在回调中设置和返回的正确值
public delegate uint PSP_FILE_CALLBACK(uint context, uint notification, IntPtr param1, IntPtr param2);
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public class FILE_IN_CABINET_INFO {
public String NameInCabinet;
public uint FileSize;
public uint Win32Error;
public ushort DosDate;
public ushort DosTime;
public ushort DosAttribs;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
public System.String FullTargetName;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public class FILEPATHS {
public String Target;
public String Source;
public uint Win32Error;
public uint Flags;
}
public const uint SPFILENOTIFY_FILEINCABINET = 0x00000011; // The file has been extracted from the cabinet.
public const uint SPFILENOTIFY_NEEDNEWCABINET = 0x00000012; // file is encountered in the cabinet.
public const uint SPFILENOTIFY_FILEEXTRACTED = 0x00000013; // The current file is continued in the next cabinet.
public const uint NO_ERROR = 0;
public const uint FILEOP_ABORT = 0; // Abort cabinet processing.
public const uint FILEOP_DOIT = 1; // Extract the current file.
public const uint FILEOP_SKIP = 2; // Skip the current file.
[DllImport("SetupApi.dll", CharSet = CharSet.Auto)]
public static extern bool SetupIterateCabinet(string cabinetFile, uint reserved, PSP_FILE_CALLBACK callBack, uint context);
[DllImport("Kernel32.dll", CharSet = CharSet.Auto)]
public static extern uint GetLastError();
static void Main(string[] args) {
IterateCabinet(@"c:\SomeCab.cab");
}
public static void IterateCabinet(string filePath) {
PSP_FILE_CALLBACK callback = new PSP_FILE_CALLBACK(CallBack);
if (!SetupIterateCabinet(filePath, 0, callback, 0))
throw new Win32Exception((int)GetLastError());
}
static uint CallBack(uint context, uint notification, IntPtr param1, IntPtr param2) {
if (notification == SPFILENOTIFY_FILEINCABINET)
return OnFileFound(context, notification, param1, param2);
else if (notification == SPFILENOTIFY_FILEEXTRACTED)
return OnFileExtractComplete(param1);
else if (notification == SPFILENOTIFY_NEEDNEWCABINET)
return NO_ERROR;
return NO_ERROR;
}
static uint OnFileFound(uint context, uint notification, IntPtr param1, IntPtr param2) {
FILE_IN_CABINET_INFO fileInCabinetInfo = (FILE_IN_CABINET_INFO)Marshal.PtrToStructure(param1, typeof(FILE_IN_CABINET_INFO));
fileInCabinetInfo.FullTargetName = fileInCabinetInfo.NameInCabinet; // extract to current directory
return FILEOP_DOIT;
}
static uint OnFileExtractComplete(IntPtr param1) {
FILEPATHS filePaths = (FILEPATHS)Marshal.PtrToStructure(param1, typeof(FILEPATHS));
if (filePaths.Win32Error == NO_ERROR)
Console.WriteLine("File {0} extracted to {1} " + filePaths.Source, filePaths.Target);
else
Console.WriteLine("Errors occurred while extracting cab File {0} to {1} ", filePaths.Source, filePaths.Target);
return filePaths.Win32Error;
}