在我的C＃项目中使用Mediainfo库，在开始调用这个dll之前，我刚刚运行了包附带的VC ++程序并部署到我的本地system.am不确定它在部署时究竟做了什么，它注册了一些东西在系统中，所以我的进程可以识别mediainfo.dll，所以它在我的本地（32位）运行良好。
当我开始在Testserver中部署时，我无法运行或部署VC ++（bcoz测试服务器除了调试器之外没有Visual Studio这样做。）我收到此错误
public class MediaInfo
{
//Import of DLL functions. DO NOT USE until you know what you do (MediaInfo DLL do NOT use CoTaskMemAlloc to allocate memory)
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_New();
//MediaInfo class
public String Inform()
{
if (Handle == (IntPtr)0)
return "Unable to load MediaInfo library";
if (MustUseAnsi)
return Marshal.PtrToStringAnsi(MediaInfoA_Inform(Handle, (IntPtr)0));
else
return Marshal.PtrToStringUni(MediaInfo_Inform(Handle, (IntPtr)0));
}
public String Get(StreamKind StreamKind, int StreamNumber, String Parameter, InfoKind KindOfInfo, InfoKind KindOfSearch)
{
if (Handle == (IntPtr)0)
return "Unable to load MediaInfo library";
if (MustUseAnsi)
{
IntPtr Parameter_Ptr=Marshal.StringToHGlobalAnsi(Parameter);
String ToReturn=Marshal.PtrToStringAnsi(MediaInfoA_Get(Handle, (IntPtr)StreamKind, (IntPtr)StreamNumber, Parameter_Ptr, (IntPtr)KindOfInfo, (IntPtr)KindOfSearch));
Marshal.FreeHGlobal(Parameter_Ptr);
return ToReturn;
}
else
return Marshal.PtrToStringUni(MediaInfo_Get(Handle, (IntPtr)StreamKind, (IntPtr)StreamNumber, Parameter, (IntPtr)KindOfInfo, (IntPtr)KindOfSearch));
}
public String Get(StreamKind StreamKind, int StreamNumber, int Parameter, InfoKind KindOfInfo)
{
if (Handle == (IntPtr)0)
return "Unable to load MediaInfo library";
if (MustUseAnsi)
return Marshal.PtrToStringAnsi(MediaInfoA_GetI(Handle, (IntPtr)StreamKind, (IntPtr)StreamNumber, (IntPtr)Parameter, (IntPtr)KindOfInfo));
else
return Marshal.PtrToStringUni(MediaInfo_GetI(Handle, (IntPtr)StreamKind, (IntPtr)StreamNumber, (IntPtr)Parameter, (IntPtr)KindOfInfo));
}
public String Option(String Option, String Value)
{
if (Handle == (IntPtr)0)
return "Unable to load MediaInfo library";
if (MustUseAnsi)
{
IntPtr Option_Ptr=Marshal.StringToHGlobalAnsi(Option);
IntPtr Value_Ptr=Marshal.StringToHGlobalAnsi(Value);
String ToReturn=Marshal.PtrToStringAnsi(MediaInfoA_Option(Handle, Option_Ptr, Value_Ptr));
Marshal.FreeHGlobal(Option_Ptr);
Marshal.FreeHGlobal(Value_Ptr);
return ToReturn;
}
else
return Marshal.PtrToStringUni(MediaInfo_Option(Handle, Option, Value));
}
public int State_Get() { if (Handle == (IntPtr)0) return 0; return (int)MediaInfo_State_Get(Handle); }
public int Count_Get(StreamKind StreamKind, int StreamNumber) { if (Handle == (IntPtr)0) return 0; return (int)MediaInfo_Count_Get(Handle, (IntPtr)StreamKind, (IntPtr)StreamNumber); }
private IntPtr Handle;
private bool MustUseAnsi;
//Default values, if you know how to set default values in C#, say me
public String Get(StreamKind StreamKind, int StreamNumber, String Parameter, InfoKind KindOfInfo) { return Get(StreamKind, StreamNumber, Parameter, KindOfInfo, InfoKind.Name); }
public String Get(StreamKind StreamKind, int StreamNumber, String Parameter) { return Get(StreamKind, StreamNumber, Parameter, InfoKind.Text, InfoKind.Name); }
public String Get(StreamKind StreamKind, int StreamNumber, int Parameter) { return Get(StreamKind, StreamNumber, Parameter, InfoKind.Text); }
public String Option(String Option_) { return Option(Option_, ""); }
public int Count_Get(StreamKind StreamKind) { return Count_Get(StreamKind, -1); }
}
刚刚google通过SourceForge.net发现了这个https://sourceforge.net/projects/mediainfo/forums/forum/297610/topic/4037237，但我仍然不知道他们的建议。
看起来他们要求导入com对象但有人请指导我如何在C＃中导入com对象？
一些如何导入dll失败，这是导入的其他任何方式还是仅仅提供了查找dll的路径？
喜欢
PathToMediaInfoDLL := "C:\Documents and Settings\Administrator\My Documents\autohotkey\MediaInfo.dll"
提前致谢了。
答案 0 :(得分：5)
要在c＃中运行MediaInfo，您不需要运行任何VC ++。只需下载二进制文件。但你需要记住一些事情：
首先：使用正确版本的mediainfo.dll x32或x64。
第二：路径是媒体库需要系统可见。因此，MediaInfo.dll与应用程序位于同一文件夹中，或者文件夹已添加到系统路径中。
第三：使用附加到库c＃wrapper类以便于互操作。
以下是从source forge下载的正确包装类：
// MediaInfoDLL - All info about media files, for DLL
// Copyright (C) 2002-2009 Jerome Martinez, Zen@MediaArea.net
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// MediaInfoDLL - All info about media files, for DLL
// Copyright (C) 2002-2009 Jerome Martinez, Zen@MediaArea.net
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
// Microsoft Visual C# wrapper for MediaInfo Library
// See MediaInfo.h for help
//
// To make it working, you must put MediaInfo.Dll
// in the executable folder
//
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
using System;
using System.Runtime.InteropServices;
namespace MediaInfoLib
{
public enum StreamKind
{
General,
Video,
Audio,
Text,
Chapters,
Image
}
public enum InfoKind
{
Name,
Text,
Measure,
Options,
NameText,
MeasureText,
Info,
HowTo
}
public enum InfoOptions
{
ShowInInform,
Support,
ShowInSupported,
TypeOfValue
}
public enum InfoFileOptions
{
FileOption_Nothing = 0x00,
FileOption_NoRecursive = 0x01,
FileOption_CloseAll = 0x02,
FileOption_Max = 0x04
};
public class MediaInfo
{
//Import of DLL functions. DO NOT USE until you know what you do (MediaInfo DLL do NOT use CoTaskMemAlloc to allocate memory)
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_New();
[DllImport("MediaInfo.dll")]
private static extern void MediaInfo_Delete(IntPtr Handle);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_Open(IntPtr Handle, [MarshalAs(UnmanagedType.LPWStr)] string FileName);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoA_Open(IntPtr Handle, IntPtr FileName);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_Open_Buffer_Init(IntPtr Handle, Int64 File_Size, Int64 File_Offset);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoA_Open(IntPtr Handle, Int64 File_Size, Int64 File_Offset);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_Open_Buffer_Continue(IntPtr Handle, IntPtr Buffer, IntPtr Buffer_Size);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoA_Open_Buffer_Continue(IntPtr Handle, Int64 File_Size, byte[] Buffer, IntPtr Buffer_Size);
[DllImport("MediaInfo.dll")]
private static extern Int64 MediaInfo_Open_Buffer_Continue_GoTo_Get(IntPtr Handle);
[DllImport("MediaInfo.dll")]
private static extern Int64 MediaInfoA_Open_Buffer_Continue_GoTo_Get(IntPtr Handle);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_Open_Buffer_Finalize(IntPtr Handle);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoA_Open_Buffer_Finalize(IntPtr Handle);
[DllImport("MediaInfo.dll")]
private static extern void MediaInfo_Close(IntPtr Handle);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_Inform(IntPtr Handle, IntPtr Reserved);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoA_Inform(IntPtr Handle, IntPtr Reserved);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_GetI(IntPtr Handle, IntPtr StreamKind, IntPtr StreamNumber, IntPtr Parameter, IntPtr KindOfInfo);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoA_GetI(IntPtr Handle, IntPtr StreamKind, IntPtr StreamNumber, IntPtr Parameter, IntPtr KindOfInfo);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_Get(IntPtr Handle, IntPtr StreamKind, IntPtr StreamNumber, [MarshalAs(UnmanagedType.LPWStr)] string Parameter, IntPtr KindOfInfo, IntPtr KindOfSearch);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoA_Get(IntPtr Handle, IntPtr StreamKind, IntPtr StreamNumber, IntPtr Parameter, IntPtr KindOfInfo, IntPtr KindOfSearch);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_Option(IntPtr Handle, [MarshalAs(UnmanagedType.LPWStr)] string Option, [MarshalAs(UnmanagedType.LPWStr)] string Value);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoA_Option(IntPtr Handle, IntPtr Option, IntPtr Value);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_State_Get(IntPtr Handle);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfo_Count_Get(IntPtr Handle, IntPtr StreamKind, IntPtr StreamNumber);
//MediaInfo class
public MediaInfo()
{
Handle = MediaInfo_New();
if (Environment.OSVersion.ToString().IndexOf("Windows")==-1)
MustUseAnsi=true;
else
MustUseAnsi=false;
}
~MediaInfo() { MediaInfo_Delete(Handle); }
public int Open(String FileName)
{
if (MustUseAnsi)
{
IntPtr FileName_Ptr = Marshal.StringToHGlobalAnsi(FileName);
int ToReturn = (int)MediaInfoA_Open(Handle, FileName_Ptr);
Marshal.FreeHGlobal(FileName_Ptr);
return ToReturn;
}
else
return (int)MediaInfo_Open(Handle, FileName);
}
public int Open_Buffer_Init(Int64 File_Size, Int64 File_Offset)
{
return (int)MediaInfo_Open_Buffer_Init(Handle, File_Size, File_Offset);
}
public int Open_Buffer_Continue(IntPtr Buffer, IntPtr Buffer_Size)
{
return (int)MediaInfo_Open_Buffer_Continue(Handle, Buffer, Buffer_Size);
}
public Int64 Open_Buffer_Continue_GoTo_Get()
{
return (int)MediaInfo_Open_Buffer_Continue_GoTo_Get(Handle);
}
public int Open_Buffer_Finalize()
{
return (int)MediaInfo_Open_Buffer_Finalize(Handle);
}
public void Close() { MediaInfo_Close(Handle); }
public String Inform()
{
if (MustUseAnsi)
return Marshal.PtrToStringAnsi(MediaInfoA_Inform(Handle, (IntPtr)0));
else
return Marshal.PtrToStringUni(MediaInfo_Inform(Handle, (IntPtr)0));
}
public String Get(StreamKind StreamKind, int StreamNumber, String Parameter, InfoKind KindOfInfo, InfoKind KindOfSearch)
{
if (MustUseAnsi)
{
IntPtr Parameter_Ptr=Marshal.StringToHGlobalAnsi(Parameter);
String ToReturn=Marshal.PtrToStringAnsi(MediaInfoA_Get(Handle, (IntPtr)StreamKind, (IntPtr)StreamNumber, Parameter_Ptr, (IntPtr)KindOfInfo, (IntPtr)KindOfSearch));
Marshal.FreeHGlobal(Parameter_Ptr);
return ToReturn;
}
else
return Marshal.PtrToStringUni(MediaInfo_Get(Handle, (IntPtr)StreamKind, (IntPtr)StreamNumber, Parameter, (IntPtr)KindOfInfo, (IntPtr)KindOfSearch));
}
public String Get(StreamKind StreamKind, int StreamNumber, int Parameter, InfoKind KindOfInfo)
{
if (MustUseAnsi)
return Marshal.PtrToStringAnsi(MediaInfoA_GetI(Handle, (IntPtr)StreamKind, (IntPtr)StreamNumber, (IntPtr)Parameter, (IntPtr)KindOfInfo));
else
return Marshal.PtrToStringUni(MediaInfo_GetI(Handle, (IntPtr)StreamKind, (IntPtr)StreamNumber, (IntPtr)Parameter, (IntPtr)KindOfInfo));
}
public String Option(String Option, String Value)
{
if (MustUseAnsi)
{
IntPtr Option_Ptr=Marshal.StringToHGlobalAnsi(Option);
IntPtr Value_Ptr=Marshal.StringToHGlobalAnsi(Value);
String ToReturn=Marshal.PtrToStringAnsi(MediaInfoA_Option(Handle, Option_Ptr, Value_Ptr));
Marshal.FreeHGlobal(Option_Ptr);
Marshal.FreeHGlobal(Value_Ptr);
return ToReturn;
}
else
return Marshal.PtrToStringUni(MediaInfo_Option(Handle, Option, Value));
}
public int State_Get() { return (int)MediaInfo_State_Get(Handle); }
public int Count_Get(StreamKind StreamKind, int StreamNumber) { return (int)MediaInfo_Count_Get(Handle, (IntPtr)StreamKind, (IntPtr)StreamNumber); }
private IntPtr Handle;
private bool MustUseAnsi;
//Default values, if you know how to set default values in C#, say me
public String Get(StreamKind StreamKind, int StreamNumber, String Parameter, InfoKind KindOfInfo) { return Get(StreamKind, StreamNumber, Parameter, KindOfInfo, InfoKind.Name); }
public String Get(StreamKind StreamKind, int StreamNumber, String Parameter) { return Get(StreamKind, StreamNumber, Parameter, InfoKind.Text, InfoKind.Name); }
public String Get(StreamKind StreamKind, int StreamNumber, int Parameter) { return Get(StreamKind, StreamNumber, Parameter, InfoKind.Text); }
public String Option(String Option_) { return Option(Option_, ""); }
public int Count_Get(StreamKind StreamKind) { return Count_Get(StreamKind, -1); }
}
public class MediaInfoList
{
//Import of DLL functions. DO NOT USE until you know what you do (MediaInfo DLL do NOT use CoTaskMemAlloc to allocate memory)
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoList_New();
[DllImport("MediaInfo.dll")]
private static extern void MediaInfoList_Delete(IntPtr Handle);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoList_Open(IntPtr Handle, [MarshalAs(UnmanagedType.LPWStr)] string FileName, IntPtr Options);
[DllImport("MediaInfo.dll")]
private static extern void MediaInfoList_Close(IntPtr Handle, IntPtr FilePos);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoList_Inform(IntPtr Handle, IntPtr FilePos, IntPtr Reserved);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoList_GetI(IntPtr Handle, IntPtr FilePos, IntPtr StreamKind, IntPtr StreamNumber, IntPtr Parameter, IntPtr KindOfInfo);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoList_Get(IntPtr Handle, IntPtr FilePos, IntPtr StreamKind, IntPtr StreamNumber, [MarshalAs(UnmanagedType.LPWStr)] string Parameter, IntPtr KindOfInfo, IntPtr KindOfSearch);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoList_Option(IntPtr Handle, [MarshalAs(UnmanagedType.LPWStr)] string Option, [MarshalAs(UnmanagedType.LPWStr)] string Value);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoList_State_Get(IntPtr Handle);
[DllImport("MediaInfo.dll")]
private static extern IntPtr MediaInfoList_Count_Get(IntPtr Handle, IntPtr FilePos, IntPtr StreamKind, IntPtr StreamNumber);
//MediaInfo class
public MediaInfoList() { Handle = MediaInfoList_New(); }
~MediaInfoList() { MediaInfoList_Delete(Handle); }
public int Open(String FileName, InfoFileOptions Options) { return (int)MediaInfoList_Open(Handle, FileName, (IntPtr)Options); }
public void Close(int FilePos) { MediaInfoList_Close(Handle, (IntPtr)FilePos); }
public String Inform(int FilePos) { return Marshal.PtrToStringUni(MediaInfoList_Inform(Handle, (IntPtr)FilePos, (IntPtr)0)); }
public String Get(int FilePos, StreamKind StreamKind, int StreamNumber, String Parameter, InfoKind KindOfInfo, InfoKind KindOfSearch) { return Marshal.PtrToStringUni(MediaInfoList_Get(Handle, (IntPtr)FilePos, (IntPtr)StreamKind, (IntPtr)StreamNumber, Parameter, (IntPtr)KindOfInfo, (IntPtr)KindOfSearch)); }
public String Get(int FilePos, StreamKind StreamKind, int StreamNumber, int Parameter, InfoKind KindOfInfo) { return Marshal.PtrToStringUni(MediaInfoList_GetI(Handle, (IntPtr)FilePos, (IntPtr)StreamKind, (IntPtr)StreamNumber, (IntPtr)Parameter, (IntPtr)KindOfInfo)); }
public String Option(String Option, String Value) { return Marshal.PtrToStringUni(MediaInfoList_Option(Handle, Option, Value)); }
public int State_Get() { return (int)MediaInfoList_State_Get(Handle); }
public int Count_Get(int FilePos, StreamKind StreamKind, int StreamNumber) { return (int)MediaInfoList_Count_Get(Handle, (IntPtr)FilePos, (IntPtr)StreamKind, (IntPtr)StreamNumber); }
private IntPtr Handle;
//Default values, if you know how to set default values in C#, say me
public void Open(String FileName) { Open(FileName, 0); }
public void Close() { Close(-1); }
public String Get(int FilePos, StreamKind StreamKind, int StreamNumber, String Parameter, InfoKind KindOfInfo) { return Get(FilePos, StreamKind, StreamNumber, Parameter, KindOfInfo, InfoKind.Name); }
public String Get(int FilePos, StreamKind StreamKind, int StreamNumber, String Parameter) { return Get(FilePos, StreamKind, StreamNumber, Parameter, InfoKind.Text, InfoKind.Name); }
public String Get(int FilePos, StreamKind StreamKind, int StreamNumber, int Parameter) { return Get(FilePos, StreamKind, StreamNumber, Parameter, InfoKind.Text); }
public String Option(String Option_) { return Option(Option_, ""); }
public int Count_Get(int FilePos, StreamKind StreamKind) { return Count_Get(FilePos, StreamKind, -1); }
}
} //NameSpace
答案 1 :(得分：2)
只需添加＆＃34; MediaInfo.dll＆＃34;到文件夹＆＃34; YourVisualStudioProjectPath \ bin \ Debug \＆＃34; （来自Debugging创建的VisualStudio;已编译的＆＃34; * .exe＆＃34;文件在那里......）