本文整理汇总了C#中IStorage.OpenStream方法的典型用法代码示例。如果您正苦于以下问题：C# IStorage.OpenStream方法的具体用法？C# IStorage.OpenStream怎么用？C# IStorage.OpenStream使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类IStorage的用法示例。
在下文中一共展示了IStorage.OpenStream方法的7个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: OpenStream
private void OpenStream(IStorage parentStorage, ref FileAccess access)
{
ShellAPI.STGM grfmode = ShellAPI.STGM.SHARE_DENY_WRITE;
switch (access)
{
case FileAccess.ReadWrite:
grfmode |= ShellAPI.STGM.READWRITE;
break;
case FileAccess.Write:
grfmode |= ShellAPI.STGM.WRITE;
break;
}
if (parentStorage != null)
{
if (parentStorage.OpenStream(
shellItem.Text + (shellItem.IsLink ? ".lnk" : string.Empty),
IntPtr.Zero,
grfmode,
0,
out streamPtr) == ShellAPI.S_OK)
{
stream = (IStream)Marshal.GetTypedObjectForIUnknown(streamPtr, typeof(IStream));
}
else if (access != FileAccess.Read)
{
if (parentStorage.OpenStream(
shellItem.Text + (shellItem.IsLink ? ".lnk" : string.Empty),
IntPtr.Zero,
ShellAPI.STGM.SHARE_DENY_WRITE,
0,
out streamPtr) == ShellAPI.S_OK)
{
access = FileAccess.Read;
stream = (IStream)Marshal.GetTypedObjectForIUnknown(streamPtr, typeof(IStream));
}
else
throw new IOException(String.Format("Can't open stream: {0}", shellItem));
}
else
throw new IOException(String.Format("Can't open stream: {0}", shellItem));
}
else
{
access = FileAccess.Read;
if (!ShellHelper.GetIStream(shellItem, out streamPtr, out stream))
throw new IOException(String.Format("Can't open stream: {0}", shellItem));
}
}示例2: GetOleStream
private byte[] GetOleStream(IStorage storage, comTypes.STATSTG statstg)
{
comTypes.IStream pIStream;
storage.OpenStream(statstg.pwcsName,
IntPtr.Zero,
(uint)(STGM.READ | STGM.SHARE_EXCLUSIVE),
0,
out pIStream);
byte[] data = new byte[statstg.cbSize];
pIStream.Read(data, (int)statstg.cbSize, IntPtr.Zero);
Marshal.ReleaseComObject(pIStream);
return data;
}示例3: InitialThumbNameList
private CatalogItem[] InitialThumbNameList(IStorage m_IStorage)
{
IStream catalogHeaderStream;
m_IStorage.OpenStream(CATALOG_HEADER_NAME,
IntPtr.Zero,
(uint)(Win32.STGM.READWRITE | Win32.STGM.SHARE_EXCLUSIVE),
0,
out catalogHeaderStream);
var header = new CatalogHeader();
var size = Marshal.SizeOf(typeof(CatalogHeader));
var buffer = new byte[size];
var cbRead = Marshal.AllocCoTaskMem(4);
try
{
catalogHeaderStream.Read(buffer, size, cbRead);
if (size != Marshal.ReadInt32(cbRead))
throw new InvalidOperationException("在从Thumb.db读取CatalogHeader失败！");
}
finally
{
Marshal.FreeCoTaskMem(cbRead);
}
using (var reader = new BinaryReader(new MemoryStream(buffer)))
{
header.Reserved1 = reader.ReadInt16();
header.Reserved2 = reader.ReadInt16();
header.ThumbCount = reader.ReadInt32();
header.ThumbHeight = reader.ReadInt32();
header.ThumbWidth = reader.ReadInt32();
}
ThumbHeight = header.ThumbHeight;
ThumbWidth = header.ThumbWidth;
return ReadNameList(catalogHeaderStream, header);
}示例4: openStream
/// <summary>
/// Open a file stream, used by FileStreamEx
/// </summary>
internal static void openStream(IStorage parentStorage, string filename, ref FileMode mode, ref FileAccess access, out IntPtr streamPtr, out IStream stream)
{
ShellAPI.STGM grfmode = ShellAPI.STGM.SHARE_DENY_WRITE;
switch (access)
{
case FileAccess.ReadWrite:
grfmode |= ShellAPI.STGM.READWRITE;
break;
case FileAccess.Write:
grfmode |= ShellAPI.STGM.WRITE;
break;
}
switch (mode)
{
case FileMode.Create:
if (FileEx.Exists(filename))
grfmode |= ShellAPI.STGM.CREATE;
break;
case FileMode.CreateNew:
grfmode |= ShellAPI.STGM.CREATE;
break;
}
if (parentStorage != null)
{
if (parentStorage.OpenStream(
filename,
IntPtr.Zero,
grfmode,
0,
out streamPtr) == ShellAPI.S_OK)
{
stream = (IStream)Marshal.GetTypedObjectForIUnknown(streamPtr, typeof(IStream));
}
else if (access != FileAccess.Read)
{
//Create file if not exists
if (parentStorage.CreateStream(
filename, ShellAPI.STGM.WRITE, 0, 0, out streamPtr) == ShellAPI.S_OK)
{
stream = (IStream)Marshal.GetTypedObjectForIUnknown(streamPtr, typeof(IStream));
}
else
throw new IOException(String.Format("Can't open stream: {0}", filename));
}
else
throw new IOException(String.Format("Can't open stream: {0}", filename));
}
else
throw new IOException(String.Format("Can't open stream: {0}", filename));
}示例5: getFileStat
/// <summary>
/// return STATSTG info of a file.
/// </summary>
internal static bool getFileStat(IStorage parentStorage, string filename, out ShellAPI.STATSTG statstg)
{
IntPtr streamPtr = IntPtr.Zero;
IStream stream = null;
statstg = new ShellAPI.STATSTG();
try
{
if (parentStorage.OpenStream(
filename,
IntPtr.Zero,
ShellAPI.STGM.READ,
0,
out streamPtr) == ShellAPI.S_OK)
{
stream = (IStream)Marshal.GetTypedObjectForIUnknown(streamPtr, typeof(IStream));
stream.Stat(out statstg, ShellAPI.STATFLAG.DEFAULT);
return true;
}
}
finally
{
if (stream != null)
{
Marshal.ReleaseComObject(stream);
stream = null;
}
if (streamPtr != IntPtr.Zero)
{
Marshal.Release(streamPtr);
streamPtr = IntPtr.Zero;
}
}
return false;
}示例6: ProcessPackage
static void ProcessPackage(IStorage pStg, string destinationFolder)
{
System.Runtime.InteropServices.ComTypes.IStream pStream;
IEnumSTATSTG pEnumStatStg;
uint numReturned;
pStg.EnumElements(0, IntPtr.Zero, 0, out pEnumStatStg);
System.Runtime.InteropServices.ComTypes.STATSTG[] ss = new System.Runtime.InteropServices.ComTypes.STATSTG[1];
// Loop through the STATSTG structures in the storage.
do
{
// Retrieve the STATSTG structure
pEnumStatStg.Next(1, ss, out numReturned);
if (numReturned != 0)
{
//System.Runtime.InteropServices.ComTypes.STATSTG statstm;
byte[] bytT = new byte[4];
// Check if the pwcsName contains "Ole10Native" stream which contain the actual embedded object
if (ss[0].pwcsName.Contains("Ole10Native") == true)
{
// Get the stream objectOpen the stream
pStg.OpenStream(ss[0].pwcsName, IntPtr.Zero, (uint)STGM.READ | (uint)STGM.SHARE_EXCLUSIVE, 0, out pStream);
//pStream.Stat(out statstm, (int) STATFLAG.STATFLAG_DEFAULT);
IntPtr position = IntPtr.Zero;
// File name starts from 7th Byte.
// Position the cursor to the 7th Byte.
pStream.Seek(6, 0, position);
IntPtr ulRead = new IntPtr();
char[] filename = new char[260];
int i;
// Read the File name of the embedded object
for (i = 0; i < 260; i++)
{
pStream.Read(bytT, 1, ulRead);
pStream.Seek(0, 1, position);
filename[i] = (char)bytT[0];
if (bytT[0] == 0)
{
break;
}
}
string path = new string(filename, 0, i);
// Next part is the source path of the embedded object.
// Length is unknown. Hence, loop through each byte to read the 0 terminated string
// Read the source path.
for (i = 0; i < 260; i++)
{
pStream.Read(bytT, 1, ulRead);
pStream.Seek(0, 1, position);
filename[i] = (char)bytT[0];
if (bytT[0] == 0)
{
break;
}
}
// Source File path
string fullpath = new string(filename, 0, i);
// Unknown 4 bytes
pStream.Seek(4, 1, position);
// Next 4 byte gives the length of the temporary file path
// (Office uses a temporary location to copy the files before inserting to the document)
// The length is in little endian format. Hence conversion is needed
pStream.Read(bytT, 4, ulRead);
ulong dwSize, dwTemp;
dwSize = 0;
dwTemp = (ulong)bytT[3];
dwSize += (ulong)(bytT[3] << 24);
dwSize += (ulong)(bytT[2] << 16);
dwSize += (ulong)(bytT[1] << 8);
dwSize += bytT[0];
// Skip the temporary file path
pStream.Seek((long)dwSize, 1, position);
// Next four bytes gives the size of the actual data in little endian format.
// Convert the format.
pStream.Read(bytT, 4, ulRead);
dwTemp = 0;
dwSize = 0;
dwTemp = (ulong)bytT[3];
dwSize += (ulong)(bytT[3] << 24);
dwSize += (ulong)(bytT[2] << 16);
dwSize += (ulong)(bytT[1] << 8);
dwSize += (ulong)bytT[0];
// Read the actual file content
byte[] byData = new byte[dwSize];
pStream.Read(byData, (int)dwSize, ulRead);
// Create the file
var bWriter = new BinaryWriter(File.Open(Path.Combine(destinationFolder, path), FileMode.Create));
bWriter.Write(byData);
bWriter.Close();
}
}
//.........这里部分代码省略.........
示例7: Load
public int Load(IStorage pstg)
{
if (!(null == _document))
throw new InvalidOperationException(nameof(_document) + " should be null");
string documentName = null;
Version altaxoVersion;
ComDebug.ReportInfo("{0}.IPersistStorage.Load", this.GetType().Name);
try
{
using (var stream = new ComStreamWrapper(pstg.OpenStream("AltaxoVersion", IntPtr.Zero, (int)(STGM.READ | STGM.SHARE_EXCLUSIVE), 0), true))
{
var bytes = new byte[stream.Length];
stream.Read(bytes, 0, bytes.Length);
var versionString = System.Text.Encoding.UTF8.GetString(bytes);
altaxoVersion = Version.Parse(versionString);
}
ComDebug.ReportInfo("{0}.IPersistStorage.Load -> Version: {1}", this.GetType().Name, altaxoVersion);
}
catch (Exception ex)
{
ComDebug.ReportInfo("{0}.IPersistStorage.Load Failed to load stream AltaxoVersion, exception: {1}", this.GetType().Name, ex);
}
try
{
using (var stream = new ComStreamWrapper(pstg.OpenStream("AltaxoGraphName", IntPtr.Zero, (int)(STGM.READ | STGM.SHARE_EXCLUSIVE), 0), true))
{
var bytes = new byte[stream.Length];
stream.Read(bytes, 0, bytes.Length);
documentName = System.Text.Encoding.UTF8.GetString(bytes);
}
ComDebug.ReportInfo("{0}.IPersistStorage.Load -> Name of GraphDocument: {1}", this.GetType().Name, documentName);
}
catch (Exception ex)
{
ComDebug.ReportInfo("{0}.IPersistStorage.Load Failed to load stream AltaxoGraphName, exception: {1}", this.GetType().Name, ex);
}
try
{
using (var streamWrapper = new ComStreamWrapper(pstg.OpenStream("AltaxoProjectZip", IntPtr.Zero, (int)(STGM.READ | STGM.SHARE_EXCLUSIVE), 0), true))
{
_comManager.InvokeGuiThread(() =>
{
Current.ProjectService.CloseProject(true);
Current.ProjectService.LoadProject(streamWrapper);
});
}
ComDebug.ReportInfo("{0}.IPersistStorage.Load Project loaded", this.GetType().Name);
}
catch (Exception ex)
{
ComDebug.ReportInfo("{0}.IPersistStorage.Load Failed to load stream AltaxoProjectZip, exception: {1}", this.GetType().Name, ex);
}
Marshal.ReleaseComObject(pstg);
Altaxo.Graph.GraphDocumentBase newDocument = null;
if (null != documentName)
{
Altaxo.Graph.Gdi.GraphDocument newDocGdi;
Altaxo.Graph.Graph3D.GraphDocument newDoc3D;
if (Current.Project.GraphDocumentCollection.TryGetValue(documentName, out newDocGdi))
newDocument = newDocGdi;
else if (Current.Project.Graph3DDocumentCollection.TryGetValue(documentName, out newDoc3D))
newDocument = newDoc3D;
}
if (null == newDocument)
{
if (null != Current.Project.GraphDocumentCollection.FirstOrDefault())
newDocument = Current.Project.GraphDocumentCollection.First();
else if (null != Current.Project.Graph3DDocumentCollection.FirstOrDefault())
newDocument = Current.Project.Graph3DDocumentCollection.First();
}
if (null != newDocument)
{
Document = newDocument;
_comManager.InvokeGuiThread(() => Current.ProjectService.ShowDocumentView(_document));
}
if (null == Document)
{
ComDebug.ReportError("{0}.IPersistStorage.Load Document is null, have to throw an exception now!!", this.GetType().Name);
throw new InvalidOperationException();
}
_isDocumentDirty = false;
return ComReturnValue.S_OK;
}