A C dll has:
struct CredPair{
char usr[127];
char pas[127];
};
struct CredData{
enum CredType {
PAIR,
KEY
} credType;
void* CredVal;
};
struct EndpointData {
enum EndpointType {
DIRECT
} endpointType;
void* endpointVal;
};
struct EndpointDirect {
char url[127];
};
I need to call a function in this dll from my C# code, which has the following signature:
__declspec(dllexport) MyErrCode CheckUser(const struct CredData* cred_data, const struct EndpointData* endpoint_data);
Here is what I have tried:
I first declared the corresponding types in C# :
public struct CredPair
{
public string usr;
public string pas;
}
public enum CredType
{
PAIR,
KEY
}
public struct EndpointDirect
{
public string url;
}
public enum EndpointType
{
DIRECT
}
public struct CredData
{
public CredType credType;
public IntPtr credVal;
}
public struct EndpointData {
public EndpointType endpointType;
public IntPtr endpointVal;
}
Later declared the function as:
[DllImport("mydll.dll")]
public static extern MyErrCode CheckUser(CredData cred_Data, EndpointData endpoint_data);
and then call the function as:
CredData objCredData = new CredData();
objCredData.credType = CredType.PAIR;
CredPair objPair = new CredPair();
objPair.usr = "abc#xyz.com";
objPair.pas = "admin#1234";
IntPtr pnt = Marshal.AllocHGlobal(Marshal.SizeOf(objPair));
Marshal.StructureToPtr(objPair, pnt, false);
objCredData.credentialValue = pnt;
EndpointData objData = new EndpointData ();
objData.endpointType = EndpointType.DIRECT;
EndpointDirect epd = new EndpointDirect ();
epd.url = "example.com";
IntPtr urlptr = Marshal.AllocHGlobal(Marshal.SizeOf(epd));
Marshal.StructureToPtr(epd, urlptr, false);
objData.endpointValue = urlptr;
error_code = CheckUser(objCredData, objData);
But looks like parameters are not received correctly.
What parameters are wrong here? I believed void* in struct will become IntPtr in C#. The functions also need pointers to structure. Will that also have to be converted to IntPtr?
You have a number of issues with your PInvoke declarations
You need to make sure to free your HGlobal memory, otherwise it will leak.
The strings are declared as fixed size char arrays in C, so need to be CharSet.Ansi...
... and they need to be declared [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 127)] so they have fixed nested size.
The parameters to the function need to be ref, possibly with [In] attribute also.
You need CallingConvention = CallingConvention.Cdecl
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct CredPair
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 127)]
public string usr;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 127)]
public string pas;
}
public enum CredType
{
PAIR,
KEY
}
public enum EndpointType
{
DIRECT
}
public struct CredData
{
public CredType credType;
public IntPtr credVal;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct EndpointDirect
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 127)]
public string url;
}
public struct EndpointData
{
public EndpointType endpointType;
public IntPtr endpointVal;
}
[DllImport("mydll.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern MyErrCode CheckUser([In] ref CredData cred_Data, [In] ref EndpointData endpoint_data);
IntPtr pnt;
IntPtr urlptr;
try
{
CredPair objPair = new CredPair
{
usr = "abc#xyz.com"
pas = "admin#1234",
};
pnt = Marshal.AllocHGlobal(Marshal.SizeOf(objPair));
Marshal.StructureToPtr(objPair, pnt, false);
CredData objCredData = new CredData
{
credType = CredType.PAIR,
credVal = pnt,
};
endpointValue = new EndpointDirect
{
url = "example.com",
};
urlptr = Marshal.AllocHGlobal(Marshal.SizeOf(epd));
Marshal.StructureToPtr(epd, urlptr, false);
EndpointData objData = new EndpointData
{
endpointType = EndpointType.DIRECT,
endpointValue = urlptr,
};
error_code = CheckUser(ref objCredData, ref objData);
}
finally
{
Marshal.FreeHGlobal(pnt);
Marshal.FreeHGlobal(urlptr);
}
I could not find out what I'm doing wrong. I think I'm doing everything by the numbers, but it looks like I'm missing something.
On the managed side:
public override List<TimerPair> GetNativeTimers()
{
var listPtr = HgrDll.GetNativeTimers(out var size, out var ptrShift);
if (listPtr == IntPtr.Zero)
throw new NullReferenceException("sounds like the list"
+ " pointer was not given");
var timerPairList = new List<TimerPair>(size);
var structSize = Marshal.SizeOf(typeof(TimerPairStruct2));
for (var i = 0; i < size; i++)
{
var o = Marshal.PtrToStructure<TimerPairStruct2>(listPtr).ToTimerPair();
timerPairList.Add(o);
listPtr += structSize;
}
return timerPairList;
}
The target struct (used for intermediate compute) and class:
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
internal struct TimerPairStruct2 : ITimerPairStruct
{
public long Time;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst=64)]
public string Descr;
public TimerPair ToTimerPair() => new TimerPair(Descr, Time);
}
public class TimerPair
{
public string Descr { get; set; }
public TimeSpan Time { get; set; }
public TimerPair(string descr, long time)
{
Descr = descr;
Time = new TimeSpan(0,0,0,0, (int)((double)time/1000000));
}
}
For the Pinvoke part:
[DllImport("DwarfHomograph.dll", CallingConvention = CallingConvention.Cdecl)]
internal static extern IntPtr GetNativeTimers(out int size, out int ptrShift);
and now on the native side:
DwarfHgr* DwarfAsset = nullptr;
extern "C" __declspec(dllexport) list<TimerPair>* GetNativeTimers(
int* size,
int* ptrShift)
{
return DwarfAsset->GetNativeTimers(size, ptrShift);
}
the used method from the DwarfHgr class:
list<TimerPair>* DwarfHgr::GetNativeTimers(int* size, int* ptrShift)
{
TimerPairsList = Sw.AsTimerPairs();
*size = static_cast<int>(TimerPairsList.size());
*ptrShift = sizeof(TimerPair);
return &TimerPairsList;
}
and the member is list<TimerPair> TimerPairsList;
The struct I'm marshaling is:
//#pragma pack(push,8)
struct __declspec(dllexport) TimerPair final
{
long long Time{}; // ns
char Descr[64]{};
};
//#pragma pack(pop)
I'm having unit tests in both native and managed sides; the expected result looks like (native):
ImageA processing: 22.0704ms
ImageB processing: 22.0448ms
MatFullA.copyTo: 1.87452ms
MatToSparse: 1.93482ms
calcOpticalFlowFarneback: 1115.48ms
create flowSparse image: 10.1416ms
But I have this (managed):
°óŠqÉ: 1,964,675.000000ms
q$Fý: 140,725,780.000000ms
xr$Fý: 140,725,780.000000ms
: 549,755.000000ms
à¡CUÉ: 1,964,675.000000ms
: 0.000000ms
I am creating a Shared folder on a remote computer/server and have this working but am unable to find if it is possible to change the share settings. I would like to be able to turn off Allow caching of share and turn on Access-based Enumeration but am unable to find anything on this on here and through searching google. Does anybody know if this is possible with C#?
The code i am using to create the share is:
public static void CreateRemoteShare(string servername, string FolderPath, string ShareName, string Description)
{
try
{
string scope = string.Format("\\\\{0}\\root\\cimv2", servername);
ManagementScope ms = new ManagementScope(scope);
ManagementClass managementClass = new ManagementClass("Win32_Share");
managementClass.Scope = ms;
ManagementBaseObject inParams = managementClass.GetMethodParameters("Create");
ManagementBaseObject outParams;
inParams["Description"] = Description;
inParams["Name"] = ShareName;
inParams["Path"] = FolderPath;
inParams["Type"] = 0x0;
NTAccount everyoneAccount = new NTAccount(null, "EVERYONE");
SecurityIdentifier sid = (SecurityIdentifier)everyoneAccount.Translate(typeof(SecurityIdentifier));
byte[] sidArray = new byte[sid.BinaryLength];
sid.GetBinaryForm(sidArray, 0);
ManagementObject everyone = new ManagementClass("Win32_Trustee");
everyone["Domain"] = null;
everyone["Name"] = "EVERYONE";
everyone["SID"] = sidArray;
ManagementObject dacl = new ManagementClass("Win32_Ace");
dacl["AccessMask"] = 2032127;
dacl["AceFlags"] = 3;
dacl["AceType"] = 0;
dacl["Trustee"] = everyone;
ManagementObject securityDescriptor = new ManagementClass("Win32_SecurityDescriptor");
securityDescriptor["ControlFlags"] = 4; //SE_DACL_PRESENT
securityDescriptor["DACL"] = new object[] { dacl };
inParams["Access"] = securityDescriptor;
outParams = managementClass.InvokeMethod("Create", inParams, null);
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
If anybody knows of any way to do this i would be eternaly greatfull.
After looking in to this a bit more i found a site that contained a way to do it in PowerShell and from the site i added this to my C# code. The site is: ABE Powershell
The resulting code extracted is as follows:
public enum Share_Type : uint
{
STYPE_DISKTREE = 0x00000000, // Disk Drive
STYPE_PRINTQ = 0x00000001, // Print Queue
STYPE_DEVICE = 0x00000002, // Communications Device
STYPE_IPC = 0x00000003, // InterProcess Communications
STYPE_SPECIAL = 0x80000000, // Special share types (C$, ADMIN$, IPC$, etc)
STYPE_TEMPORARY = 0x40000000 // Temporary share
}
public enum Share_ReturnValue : int
{
NERR_Success = 0,
ERROR_ACCESS_DENIED = 5,
ERROR_NOT_ENOUGH_MEMORY = 8,
ERROR_INVALID_PARAMETER = 87,
ERROR_INVALID_LEVEL = 124, // unimplemented level for info
ERROR_MORE_DATA = 234,
NERR_BufTooSmall = 2123, // The API return buffer is too small.
NERR_NetNameNotFound = 2310 // This shared resource does not exist.
}
[System.Flags]
public enum Shi1005_flags
{
SHI1005_FLAGS_DFS = 0x0001, // Part of a DFS tree (Cannot be set)
SHI1005_FLAGS_DFS_ROOT = 0x0002, // Root of a DFS tree (Cannot be set)
SHI1005_FLAGS_RESTRICT_EXCLUSIVE_OPENS = 0x0100, // Disallow Exclusive file open
SHI1005_FLAGS_FORCE_SHARED_DELETE = 0x0200, // Open files can be force deleted
SHI1005_FLAGS_ALLOW_NAMESPACE_CACHING = 0x0400, // Clients can cache the namespace
SHI1005_FLAGS_ACCESS_BASED_DIRECTORY_ENUM = 0x0800, // Only directories for which a user has FILE_LIST_DIRECTORY will be listed
SHI1005_FLAGS_FORCE_LEVELII_OPLOCK = 0x1000, // Prevents exclusive caching
SHI1005_FLAGS_ENABLE_HASH = 0x2000, // Used for server side support for peer caching
SHI1005_FLAGS_ENABLE_CA = 0X4000 // Used for Clustered shares
}
public static class NetApi32
{
// ********** Structures **********
// SHARE_INFO_502
[StructLayout(LayoutKind.Sequential)]
public struct SHARE_INFO_502
{
[MarshalAs(UnmanagedType.LPWStr)]
public string shi502_netname;
public uint shi502_type;
[MarshalAs(UnmanagedType.LPWStr)]
public string shi502_remark;
public Int32 shi502_permissions;
public Int32 shi502_max_uses;
public Int32 shi502_current_uses;
[MarshalAs(UnmanagedType.LPWStr)]
public string shi502_path;
public IntPtr shi502_passwd;
public Int32 shi502_reserved;
public IntPtr shi502_security_descriptor;
}
// SHARE_INFO_1005
[StructLayout(LayoutKind.Sequential)]
public struct SHARE_INFO_1005
{
public Int32 Shi1005_flags;
}
private class unmanaged
{
//NetShareGetInfo
[DllImport("Netapi32.dll", SetLastError = true)]
internal static extern int NetShareGetInfo(
[MarshalAs(UnmanagedType.LPWStr)] string serverName,
[MarshalAs(UnmanagedType.LPWStr)] string netName,
Int32 level,
ref IntPtr bufPtr
);
[DllImport("Netapi32.dll", SetLastError = true)]
public extern static Int32 NetShareSetInfo(
[MarshalAs(UnmanagedType.LPWStr)] string servername,
[MarshalAs(UnmanagedType.LPWStr)] string netname, Int32 level, IntPtr bufptr, out Int32 parm_err);
}
// ***** Functions *****
public static SHARE_INFO_502 NetShareGetInfo_502(string ServerName, string ShareName)
{
Int32 level = 502;
IntPtr lShareInfo = IntPtr.Zero;
SHARE_INFO_502 shi502_Info = new SHARE_INFO_502();
Int32 result = unmanaged.NetShareGetInfo(ServerName, ShareName, level, ref lShareInfo);
if ((Share_ReturnValue)result == Share_ReturnValue.NERR_Success)
{
shi502_Info = (SHARE_INFO_502)Marshal.PtrToStructure(lShareInfo, typeof(SHARE_INFO_502));
}
else
{
throw new Exception("Unable to get 502 structure. Function returned: " + (Share_ReturnValue)result);
}
return shi502_Info;
}
public static SHARE_INFO_1005 NetShareGetInfo_1005(string ServerName, string ShareName)
{
Int32 level = 1005;
IntPtr lShareInfo = IntPtr.Zero;
SHARE_INFO_1005 shi1005_Info = new SHARE_INFO_1005();
Int32 result = unmanaged.NetShareGetInfo(ServerName, ShareName, level, ref lShareInfo);
if ((Share_ReturnValue)result == Share_ReturnValue.NERR_Success)
{
shi1005_Info = (SHARE_INFO_1005)Marshal.PtrToStructure(lShareInfo, typeof(SHARE_INFO_1005));
}
else
{
throw new Exception("Unable to get 1005 structure. Function returned: " + (Share_ReturnValue)result);
}
return shi1005_Info;
}
public static int NetShareSetInfo_1005(string ServerName, string ShareName, SHARE_INFO_1005 shi1005_Info) // Int32 Shi1005_flags
{
Int32 level = 1005;
Int32 err;
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(shi1005_Info));
Marshal.StructureToPtr(shi1005_Info, ptr, false);
var result = unmanaged.NetShareSetInfo(ServerName, ShareName, level, ptr, out err);
return result;
}
}
static void Main(string[] args)
{
abeTest();
}
public static void abeTest()
{
NetApi32.SHARE_INFO_1005 test = new NetApi32.SHARE_INFO_1005();
test.Shi1005_flags = 2048;
NetApi32.NetShareSetInfo_1005("FileStore2", "TestShare2$", test);
}
By combining both this and the above code you are able to create a share and set the access based enumeration.
In Word/Excel you have to possibility to add Custom properties. (See Image)
Custom Properties.
As you guys can see there is the field: "Properties:", you can add any information you want there.
When you save the file and you go to the file location in the folder, you can right click -> Properties and you have all the tabs: General/Security/Details/Previous Versions. with the feature you add the tab Custom.
Now I want to get this information through coding: Custom Properties information. and extract it later to notepad.
So far i used the Shell32 but then I only get the information that is in the Details tab. I did some research and saw some possibilities with DSOfile.dll. But I want to know if there is a possibility to do this without installing other DLL?
This is my code so far with the Shell32.
static void Main(string[] args)
{
//using (StreamWriter writer = new StreamWriter(#"filepathhere"))
//{
//Console.SetOut(writer);
ReadProperties();
//}
}
static void ReadProperties()
{
List<string> arrHeaders = new List<string>();
Shell shell = new Shell();
Folder objFolder = shell.NameSpace(#"filepathhere");
FolderItem objFolderItem = objFolder.ParseName("filehere.doc");
for (int i = 0; i < short.MaxValue; i++)
{
string header = objFolder.GetDetailsOf(objFolder, i);
if (String.IsNullOrEmpty(header))
break;
arrHeaders.Add(header);
}
for ( int i = 0; i < arrHeaders.Count; i++)
{
Console.WriteLine("{0}\t{1}: {2}", i, arrHeaders[i], objFolder.GetDetailsOf(objFolderItem, i));
}
Console.ReadKey();
}
Thanks in advance!
Desu
Historically these properties were defined by the technology called "Structured Storage". The first Structured Storage implementation is the ancient (but still very alive) Compound File Format
After that, Microsoft added Structured Storage capabilities directly into NTFS. This allows you to define properties like author or title on any files (even .txt) files. Although the Explorer UI does not let you do this anymore for some reason, I think it still works programmatically.
And then, with Vista, Microsoft rebooted all that and introduced a superset of all this: the Windows Property System.
Unfortunately, there is no .NET API in the framework for all this. But Microsoft created an open source .NET library called the Windows API CodePack. So, the easiest way for you to extract properties is to add a reference to the WindowsAPICodePack Core NugetPackage and you can use it like this:
static void Main(string[] args)
{
foreach (var prop in new ShellPropertyCollection(#"mypath\myfile"))
{
Console.WriteLine(prop.CanonicalName + "=" + prop.ValueAsObject);
}
}
If you don't want to add extra DLLs, then you can extract the ShellPropertyCollection code from the WindowsAPICodePack source (Windows API Code Pack: Where is it?). It's quite a work but doable.
Another solution in your case, is to use the old Structure Storage native API. I've provided a sample that does this. Here is how you can use it:
static void Main(string[] args)
{
foreach (var prop in new StructuredStorage(#"mypath\myfile").Properties)
{
Console.WriteLine(prop.Name + "=" + prop.Value);
}
}
public sealed class StructuredStorage
{
public static readonly Guid SummaryInformationFormatId = new Guid("{F29F85E0-4FF9-1068-AB91-08002B27B3D9}");
public static readonly Guid DocSummaryInformationFormatId = new Guid("{D5CDD502-2E9C-101B-9397-08002B2CF9AE}");
public static readonly Guid UserDefinedPropertiesId = new Guid("{D5CDD505-2E9C-101B-9397-08002B2CF9AE}");
private List<StructuredProperty> _properties = new List<StructuredProperty>();
public StructuredStorage(string filePath)
{
if (filePath == null)
throw new ArgumentNullException("filePath");
FilePath = filePath;
IPropertySetStorage propertySetStorage;
int hr = StgOpenStorageEx(FilePath, STGM.STGM_READ | STGM.STGM_SHARE_DENY_NONE | STGM.STGM_DIRECT_SWMR, STGFMT.STGFMT_ANY, 0, IntPtr.Zero, IntPtr.Zero, typeof(IPropertySetStorage).GUID, out propertySetStorage);
if (hr == STG_E_FILENOTFOUND || hr == STG_E_PATHNOTFOUND)
throw new FileNotFoundException(null, FilePath);
if (hr != 0)
throw new Win32Exception(hr);
try
{
LoadPropertySet(propertySetStorage, SummaryInformationFormatId);
LoadPropertySet(propertySetStorage, DocSummaryInformationFormatId);
}
finally
{
Marshal.ReleaseComObject(propertySetStorage);
}
// for some reason we can't read this one on the same COM ref?
LoadProperties(UserDefinedPropertiesId);
}
public string FilePath { get; private set; }
public IReadOnlyList<StructuredProperty> Properties
{
get
{
return _properties;
}
}
private void LoadPropertySet(IPropertySetStorage propertySetStorage, Guid fmtid)
{
IPropertyStorage propertyStorage;
int hr = propertySetStorage.Open(fmtid, STGM.STGM_READ | STGM.STGM_SHARE_EXCLUSIVE, out propertyStorage);
if (hr == STG_E_FILENOTFOUND || hr == STG_E_ACCESSDENIED)
return;
if (hr != 0)
throw new Win32Exception(hr);
IEnumSTATPROPSTG es;
propertyStorage.Enum(out es);
if (es == null)
return;
try
{
var stg = new STATPROPSTG();
int fetched;
do
{
hr = es.Next(1, ref stg, out fetched);
if (hr != 0 && hr != 1)
throw new Win32Exception(hr);
if (fetched == 1)
{
string name = GetPropertyName(fmtid, propertyStorage, stg);
var propsec = new PROPSPEC[1];
propsec[0] = new PROPSPEC();
propsec[0].ulKind = stg.lpwstrName != null ? PRSPEC.PRSPEC_LPWSTR : PRSPEC.PRSPEC_PROPID;
IntPtr lpwstr = IntPtr.Zero;
if (stg.lpwstrName != null)
{
lpwstr = Marshal.StringToCoTaskMemUni(stg.lpwstrName);
propsec[0].union.lpwstr = lpwstr;
}
else
{
propsec[0].union.propid = stg.propid;
}
var vars = new PROPVARIANT[1];
vars[0] = new PROPVARIANT();
try
{
hr = propertyStorage.ReadMultiple(1, propsec, vars);
if (hr != 0)
throw new Win32Exception(hr);
}
finally
{
if (lpwstr != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(lpwstr);
}
}
object value;
try
{
switch (vars[0].vt)
{
case VARTYPE.VT_BOOL:
value = vars[0].union.boolVal != 0 ? true : false;
break;
case VARTYPE.VT_BSTR:
value = Marshal.PtrToStringUni(vars[0].union.bstrVal);
break;
case VARTYPE.VT_CY:
value = decimal.FromOACurrency(vars[0].union.cyVal);
break;
case VARTYPE.VT_DATE:
value = DateTime.FromOADate(vars[0].union.date);
break;
case VARTYPE.VT_DECIMAL:
IntPtr dec = IntPtr.Zero;
Marshal.StructureToPtr(vars[0], dec, false);
value = Marshal.PtrToStructure(dec, typeof(decimal));
break;
case VARTYPE.VT_DISPATCH:
value = Marshal.GetObjectForIUnknown(vars[0].union.pdispVal);
break;
case VARTYPE.VT_ERROR:
case VARTYPE.VT_HRESULT:
value = vars[0].union.scode;
break;
case VARTYPE.VT_FILETIME:
value = DateTime.FromFileTime(vars[0].union.filetime);
break;
case VARTYPE.VT_I1:
value = vars[0].union.cVal;
break;
case VARTYPE.VT_I2:
value = vars[0].union.iVal;
break;
case VARTYPE.VT_I4:
value = vars[0].union.lVal;
break;
case VARTYPE.VT_I8:
value = vars[0].union.hVal;
break;
case VARTYPE.VT_INT:
value = vars[0].union.intVal;
break;
case VARTYPE.VT_LPSTR:
value = Marshal.PtrToStringAnsi(vars[0].union.pszVal);
break;
case VARTYPE.VT_LPWSTR:
value = Marshal.PtrToStringUni(vars[0].union.pwszVal);
break;
case VARTYPE.VT_R4:
value = vars[0].union.fltVal;
break;
case VARTYPE.VT_R8:
value = vars[0].union.dblVal;
break;
case VARTYPE.VT_UI1:
value = vars[0].union.bVal;
break;
case VARTYPE.VT_UI2:
value = vars[0].union.uiVal;
break;
case VARTYPE.VT_UI4:
value = vars[0].union.ulVal;
break;
case VARTYPE.VT_UI8:
value = vars[0].union.uhVal;
break;
case VARTYPE.VT_UINT:
value = vars[0].union.uintVal;
break;
case VARTYPE.VT_UNKNOWN:
value = Marshal.GetObjectForIUnknown(vars[0].union.punkVal);
break;
default:
value = null;
break;
}
}
finally
{
PropVariantClear(ref vars[0]);
}
var property = new StructuredProperty(fmtid, name, stg.propid);
property.Value = value;
_properties.Add(property);
}
}
while (fetched == 1);
}
finally
{
Marshal.ReleaseComObject(es);
}
}
private static string GetPropertyName(Guid fmtid, IPropertyStorage propertyStorage, STATPROPSTG stg)
{
if (!string.IsNullOrEmpty(stg.lpwstrName))
return stg.lpwstrName;
var propids = new int[1];
propids[0] = stg.propid;
var names = new string[1];
names[0] = null;
int hr = propertyStorage.ReadPropertyNames(1, propids, names);
if (hr == 0)
return names[0];
return null;
}
public void LoadProperties(Guid formatId)
{
IPropertySetStorage propertySetStorage;
int hr = StgOpenStorageEx(FilePath, STGM.STGM_READ | STGM.STGM_SHARE_DENY_NONE | STGM.STGM_DIRECT_SWMR, STGFMT.STGFMT_ANY, 0, IntPtr.Zero, IntPtr.Zero, typeof(IPropertySetStorage).GUID, out propertySetStorage);
if (hr == STG_E_FILENOTFOUND || hr == STG_E_PATHNOTFOUND)
throw new FileNotFoundException(null, FilePath);
if (hr != 0)
throw new Win32Exception(hr);
try
{
LoadPropertySet(propertySetStorage, formatId);
}
finally
{
Marshal.ReleaseComObject(propertySetStorage);
}
}
private const int STG_E_FILENOTFOUND = unchecked((int)0x80030002);
private const int STG_E_PATHNOTFOUND = unchecked((int)0x80030003);
private const int STG_E_ACCESSDENIED = unchecked((int)0x80030005);
private enum PRSPEC
{
PRSPEC_LPWSTR = 0,
PRSPEC_PROPID = 1
}
private enum STGFMT
{
STGFMT_ANY = 4,
}
[Flags]
private enum STGM
{
STGM_READ = 0x00000000,
STGM_READWRITE = 0x00000002,
STGM_SHARE_DENY_NONE = 0x00000040,
STGM_SHARE_DENY_WRITE = 0x00000020,
STGM_SHARE_EXCLUSIVE = 0x00000010,
STGM_DIRECT_SWMR = 0x00400000
}
// we only define what we handle
private enum VARTYPE : short
{
VT_I2 = 2,
VT_I4 = 3,
VT_R4 = 4,
VT_R8 = 5,
VT_CY = 6,
VT_DATE = 7,
VT_BSTR = 8,
VT_DISPATCH = 9,
VT_ERROR = 10,
VT_BOOL = 11,
VT_UNKNOWN = 13,
VT_DECIMAL = 14,
VT_I1 = 16,
VT_UI1 = 17,
VT_UI2 = 18,
VT_UI4 = 19,
VT_I8 = 20,
VT_UI8 = 21,
VT_INT = 22,
VT_UINT = 23,
VT_HRESULT = 25,
VT_LPSTR = 30,
VT_LPWSTR = 31,
VT_FILETIME = 64,
}
[StructLayout(LayoutKind.Explicit)]
private struct PROPVARIANTunion
{
[FieldOffset(0)]
public sbyte cVal;
[FieldOffset(0)]
public byte bVal;
[FieldOffset(0)]
public short iVal;
[FieldOffset(0)]
public ushort uiVal;
[FieldOffset(0)]
public int lVal;
[FieldOffset(0)]
public uint ulVal;
[FieldOffset(0)]
public int intVal;
[FieldOffset(0)]
public uint uintVal;
[FieldOffset(0)]
public long hVal;
[FieldOffset(0)]
public ulong uhVal;
[FieldOffset(0)]
public float fltVal;
[FieldOffset(0)]
public double dblVal;
[FieldOffset(0)]
public short boolVal;
[FieldOffset(0)]
public int scode;
[FieldOffset(0)]
public long cyVal;
[FieldOffset(0)]
public double date;
[FieldOffset(0)]
public long filetime;
[FieldOffset(0)]
public IntPtr bstrVal;
[FieldOffset(0)]
public IntPtr pszVal;
[FieldOffset(0)]
public IntPtr pwszVal;
[FieldOffset(0)]
public IntPtr punkVal;
[FieldOffset(0)]
public IntPtr pdispVal;
}
[StructLayout(LayoutKind.Sequential)]
private struct PROPSPEC
{
public PRSPEC ulKind;
public PROPSPECunion union;
}
[StructLayout(LayoutKind.Explicit)]
private struct PROPSPECunion
{
[FieldOffset(0)]
public int propid;
[FieldOffset(0)]
public IntPtr lpwstr;
}
[StructLayout(LayoutKind.Sequential)]
private struct PROPVARIANT
{
public VARTYPE vt;
public ushort wReserved1;
public ushort wReserved2;
public ushort wReserved3;
public PROPVARIANTunion union;
}
[StructLayout(LayoutKind.Sequential)]
private struct STATPROPSTG
{
[MarshalAs(UnmanagedType.LPWStr)]
public string lpwstrName;
public int propid;
public VARTYPE vt;
}
[StructLayout(LayoutKind.Sequential)]
private struct STATPROPSETSTG
{
public Guid fmtid;
public Guid clsid;
public uint grfFlags;
public System.Runtime.InteropServices.ComTypes.FILETIME mtime;
public System.Runtime.InteropServices.ComTypes.FILETIME ctime;
public System.Runtime.InteropServices.ComTypes.FILETIME atime;
public uint dwOSVersion;
}
[DllImport("ole32.dll")]
private static extern int StgOpenStorageEx([MarshalAs(UnmanagedType.LPWStr)] string pwcsName, STGM grfMode, STGFMT stgfmt, int grfAttrs, IntPtr pStgOptions, IntPtr reserved2, [MarshalAs(UnmanagedType.LPStruct)] Guid riid, out IPropertySetStorage ppObjectOpen);
[DllImport("ole32.dll")]
private static extern int PropVariantClear(ref PROPVARIANT pvar);
[Guid("0000013B-0000-0000-C000-000000000046"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
private interface IEnumSTATPROPSETSTG
{
[PreserveSig]
int Next(int celt, ref STATPROPSETSTG rgelt, out int pceltFetched);
// rest ommited
}
[Guid("00000139-0000-0000-C000-000000000046"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
private interface IEnumSTATPROPSTG
{
[PreserveSig]
int Next(int celt, ref STATPROPSTG rgelt, out int pceltFetched);
// rest ommited
}
[Guid("00000138-0000-0000-C000-000000000046"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
private interface IPropertyStorage
{
[PreserveSig]
int ReadMultiple(uint cpspec, [MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 0)] PROPSPEC[] rgpspec, [Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 0)] PROPVARIANT[] rgpropvar);
[PreserveSig]
int WriteMultiple(uint cpspec, [MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 0)] PROPSPEC[] rgpspec, [MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 0)] PROPVARIANT[] rgpropvar, uint propidNameFirst);
[PreserveSig]
int DeleteMultiple(uint cpspec, [MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 0)] PROPSPEC[] rgpspec);
[PreserveSig]
int ReadPropertyNames(uint cpropid, [MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 0)] int[] rgpropid, [Out, MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.LPWStr, SizeParamIndex = 0)] string[] rglpwstrName);
[PreserveSig]
int NotDeclared1();
[PreserveSig]
int NotDeclared2();
[PreserveSig]
int Commit(uint grfCommitFlags);
[PreserveSig]
int NotDeclared3();
[PreserveSig]
int Enum(out IEnumSTATPROPSTG ppenum);
// rest ommited
}
[Guid("0000013A-0000-0000-C000-000000000046"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
private interface IPropertySetStorage
{
[PreserveSig]
int Create([MarshalAs(UnmanagedType.LPStruct)] Guid rfmtid, [MarshalAs(UnmanagedType.LPStruct)] Guid pclsid, uint grfFlags, STGM grfMode, out IPropertyStorage ppprstg);
[PreserveSig]
int Open([MarshalAs(UnmanagedType.LPStruct)] Guid rfmtid, STGM grfMode, out IPropertyStorage ppprstg);
[PreserveSig]
int NotDeclared3();
[PreserveSig]
int Enum(out IEnumSTATPROPSETSTG ppenum);
}
}
public sealed class StructuredProperty
{
public StructuredProperty(Guid formatId, string name, int id)
{
FormatId = formatId;
Name = name;
Id = id;
}
public Guid FormatId { get; private set; }
public string Name { get; private set; }
public int Id { get; private set; }
public object Value { get; set; }
public override string ToString()
{
return Name;
}
}
You can try NPOI engine to extract properties from different Office files (doc, xls, xlsx, docx, etc). This component doesn't have any third party dependencies and you don't need Office to use it.
However, this library is a bit tricky because you need to use different types of property extractors for different type of files. Good code sample can be found in official Git Hub repository TestHPSFPropertiesExtractor.
NuGet package can be found here.
There's a set of NuGet packages called NetOffice that you can use. There are packages for each of the Office applications, plus a few core assemblies. Get NetOffice.Word and NetOffice.Excel and install them in your solution. There's a little documentation at the Codeplex site, but I had to browse the source to really understand what was going on. Here's a sample program:
using NetOffice.OfficeApi;
using System;
namespace Office_Doc_Reader
{
class Program
{
static void Main(string[] args)
{
using (var wordApp = new NetOffice.WordApi.Application())
using (var excelApp = new NetOffice.ExcelApi.Application())
{
var doc = wordApp.Documents.Open("C:\\Users\\John\\Desktop\\test.docx");
var xls = excelApp.Workbooks.Open("C:\\Users\\John\\Desktop\\test.xlsx");
var customProperties = (DocumentProperties)doc.CustomDocumentProperties;
foreach (var property in customProperties)
{
Console.WriteLine(String.Format("Name: {0}, Value: {1}, Type: {2}", property.Name, property.Value, property.Type));
}
customProperties = (DocumentProperties)xls.CustomDocumentProperties;
foreach (var property in customProperties)
{
Console.WriteLine(String.Format("Name: {0}, Value: {1}, Type: {2}", property.Name, property.Value, property.Type));
}
}
Console.ReadKey();
}
}
}
That shows the following results:
Name: Custom prop 1, Value: Text Value, Type: msoPropertyTypeString
Name: Custom prop 2, Value: 2/21/2016 12:00:00 AM, Type: msoPropertyTypeDate
Name: Custom prop 3, Value: 42, Type: msoPropertyTypeNumber
Name: Custom prop 4, Value: True, Type: msoPropertyTypeBoolean
Name: Foo, Value: abc, Type: msoPropertyTypeString
Name: Bar, Value: 1/1/1970 12:00:00 AM, Type: msoPropertyTypeDate
Name: Baz, Value: 3.14159, Type: msoPropertyTypeFloat
Name: Qux, Value: False, Type: msoPropertyTypeBoolean
For a Word and Excel file with these properties:
I've not worked with these much at all, so I won't be able to go much deeper than this. Hope it helps.
You may use OpenXml SDK from Microsoft. I believe it is able to get any info from word/excel files.
Have a look at this https://msdn.microsoft.com/en-us/library/office/hh674468.aspx also this https://msdn.microsoft.com/en-us/library/office/bb448854.aspx
or
http://openxmldeveloper.org/
There could be a more generic approach.
If your source is a ...x file, the document can be extracted via XML queries.
If you unzip the file (eg.g with 7-Zip) you will find a file called custom.xml in the subfolder docProps.
The properties can easily be found within the XML file
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Properties xmlns="http://schemas.openxmlformats.org/officeDocument/2006/custom-properties" xmlns:vt="http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes">
<property fmtid="{D5CDD505-2E9C-101B-9397-08002B2CF9AE}" pid="2" name="SAPDOKNR">
<vt:lpwstr>10002210058</vt:lpwstr>
</property>
...
As the topic says, trying to pass a struct from c# environnement to c++.
c++ code that defines both the struct and the interface:
#pragma pack(push, 4)
struct CEA708CONFIG
{
BYTE b608Service;
BYTE bCompactStream;
BYTE pActiveServices[63];
LONG lActiveServiceCount; //
POINT ptAlignmentPosition;
};
#pragma pack(pop)
interface
__declspec(uuid("{some clsid}"))
ICEA708Decoder : IUnknown {
virtual HRESULT SetConfig(IN const CEA708CONFIG* pConfig) = 0;
virtual HRESULT GetConfig(OUT CEA708CONFIG* pConfig) = 0;
};
now to the c# code, i defined the same struct in c#
[StructLayout(LayoutKind.Sequential, Pack = 4), Serializable]
public struct CEA708CONFIG
{
public byte is608Service;
public byte isCompactStream;
//[MarshalAs(UnmanagedType.SafeArray, SafeArraySubType = VarEnum.VT_UI1)]
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 63)]
public IntPtr activeServices;
public long activeServiceCount;
public Point alignmentPosition;
};
and the corresponding interface that accepts the config structure
[ComVisible(true), ComImport, Guid("same clsid as above"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface ICEA708Decoder
{
[return: MarshalAs(UnmanagedType.I4)]
[PreserveSig]
int SetConfig([In, MarshalAs(UnmanagedType.Struct)] ref CEA708CONFIG config);
[return: MarshalAs(UnmanagedType.I4)]
[PreserveSig]
int GetConfig([Out, MarshalAs(UnmanagedType.Struct)] out CEA708CONFIG config);
}
my problem occurs whenever i try to pass the structure, i can clearly see that while executing the c# code the entire struct is intialized with "reasonable" values, but once passed to the c++, i see that something has happened during the transaction.
the c# code that makes the magic happen:
CEA708CONFIG cc708Config;
ICEA708Decoder CC708DecoderConfig = CC708Filter as ICEA708Decoder;
if (CC708DecoderConfig == null)
{
throw new ApplicationException("Couldn't get ICEA708Decoder structure");
}
byte[] dataByte = new byte[63];
int size = Marshal.SizeOf(dataByte[0]) * dataByte.Length;
IntPtr pnt = Marshal.AllocHGlobal(size);
dataByte[0] = 1;
Marshal.Copy(dataByte, 0, pnt, dataByte.Length);
cc708Config.activeServices = pnt;
if (0 != (hr = CC708DecoderConfig.SetConfig(ref cc708Config)))
{
throw new ApplicationException("Couldn't SetConfig() because: " + DirectShowLib.DsError.GetErrorText(hr));
}
and the exception triggered by the SetConfig is:
{"Cannot marshal field 'activeServices' of type
'CCReIndexer.Graphs.CEA708CONFIG': Invalid managed/unmanaged type
combination (Int/UInt must be paired with SysInt or SysUInt).":""}
thanks for your help!!
Have you tried transfer array as array?
[StructLayout(LayoutKind.Sequential, Pack = 4), Serializable]
public struct CEA708CONFIG
{
public byte is608Service;
public byte isCompactStream;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 63)]
public byte[] activeServices;
public long activeServiceCount;
public Point alignmentPosition;
};
byte[] dataByte = new byte[63];
cc708Config.activeServices = dataByte;