刻录程序报错，调用COM组件失败的问题
using System;using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
//using IMAPI2FS;
using IMAPI2.Interop;
using System.Runtime.InteropServices.ComTypes;
namespace BurnCD
{
internal class Recorder : IRecorder
{
#region IRecorder 成员
/// <summary>
/// 刻录机对象
/// </summary>
private MsftDiscRecorder2 m_recorder = null;
/// <summary>
/// 根据指定的光驱路径，建立光驱对象
/// </summary>
/// <param name="strPath">参数是光驱的标示符</param>
internal Recorder(string strID)
{
try
{
m_recorder = new MsftDiscRecorder2();
m_recorder.InitializeDiscRecorder(strID);
}
catch (System.Exception Ex)
{
throw new System.Exception("根据光驱标示符：" + strID + " 建立光驱对象出错");
}
}
/// <summary>
/// 不允许通过其他途径建立
/// </summary>
private Recorder()
{
}
/// <summary>
/// 要刻录到这个刻录机中的文件或文件夹
/// </summary>
private List<IBurnMedia> m_needBurnMedias = new List<IBurnMedia>();
/// <summary>
/// 要刻录的对象，要想修改要刻录的文件，自己从这里找好了，不再给你提供
/// 其他查询方法
/// </summary>
public List<IBurnMedia> BurnMediaFileList
{
get
{
return m_needBurnMedias;
}
}
/// <summary>
/// 添加刻录文件到这个对象中
/// </summary>
/// <returns></returns>
public IBurnMedia AddMediaFile()
{
//列表中新加一个BurnMedia对象
BurnMedia burnMedia = new BurnMedia();
m_needBurnMedias.Add(burnMedia);
return burnMedia;
}
/// <summary>
/// 刻录
/// </summary>
/// <returns></returns>
public bool Burn(out string Excep)
{
try
{
return DoBurn(out Excep);
}
catch (System.Exception Ex)
{
Excep = Ex.Message;
return false;
}
}
/// <summary>
/// 刻录
/// </summary>
private bool DoBurn(out string Excep)
{
//正式的开始刻录
MsftDiscFormat2Data msFormat = new MsftDiscFormat2Data();
msFormat.Recorder = m_recorder;
msFormat.ClientName = "15s";
//设置verification等级
IBurnVerification burnVer = (IBurnVerification)msFormat;
burnVer.BurnVerificationLevel = IMAPI_BURN_VERIFICATION_LEVEL.IMAPI_BURN_VERIFICATION_FULL;
//检查是否是blank
object[] sessions = null;
if (false == msFormat.MediaHeuristicallyBlank)
{
sessions = (object[])msFormat.MultisessionInterfaces;
}
//创建文件流
IStream fileStream = null;
if (false == CreateFileStream(ref sessions, out fileStream, out Excep))
{
return false;
}
//写文件
try
{
msFormat.Write(fileStream as System.Runtime.InteropServices.ComTypes.IStream);
Excep = "Write file to DVD success!";
return true;
}
catch (System.Exception Ex)
{
Excep = Ex.Message;
return false;
}
finally
{
if (fileStream != null)
{
Marshal.FinalReleaseComObject(fileStream);
}
}
}
/// <summary>
/// 创建文件流
/// </summary>
/// <param name="sessions"></param>
/// <param name="stream"></param>
/// <returns></returns>
private bool CreateFileStream(ref object[] sessions, out IStream stream, out string Excep)
{
MsftFileSystemImage msImage;
try
{
//设置相关信息
msImage = new MsftFileSystemImage();
msImage.ChooseImageDefaults(m_recorder);
msImage.FileSystemsToCreate = FsiFileSystems.FsiFileSystemISO9660 | FsiFileSystems.FsiFileSystemJoliet;
msImage.VolumeName = "ABC";
//以下为抄的，没看懂
if (sessions != null)
{
msImage.MultisessionInterfaces = sessions;
msImage.ImportFileSystem();
}
IFsiDirectoryItem rootItem = msImage.Root;
foreach (BurnMedia bm in m_needBurnMedias)
{
//依次刻录
bm.AddToFileSystem(rootItem);
}
stream = msImage.CreateResultImage().ImageStream;
Excep = "Create file stream success!";
return true;
}
catch (System.Exception Ex)
{
stream = null;
Excep = Ex.Message;
return false;
}
}
private long m_nDiskSize = 0;
private long m_nUseableSize = 0;
/// <summary>
/// 获取光驱中光盘的大小，单位是字节
/// </summary>
/// <returns>如果返回-1，则说明当前光驱中没有光盘或者光盘读取错误</returns>
public long GetDiskSize()
{
//首先判断光驱是否可以读盘
IDiscFormat2Data msFormat = new MsftDiscFormat2Data();
if (msFormat.IsRecorderSupported(m_recorder) == false)
{
//光驱不支持这种格式光盘，或者没有怎么的
return -1;
}
//以下代码，还没有研究明白
msFormat.Recorder = m_recorder;
//判断是不是有光盘在里面
try
{
IMAPI_FORMAT2_DATA_MEDIA_STATE st = msFormat.CurrentMediaStatus;
}
catch (System.Exception ex)
{
//光盘不存在
return -1;
}
//可用的
m_nUseableSize = msFormat.FreeSectorsOnMedia * 2048;
//总大小
m_nDiskSize = (msFormat.TotalSectorsOnMedia) * 2048;
return m_nDiskSize;
}
/// <summary>
/// 获取可用的光盘空闲空间
/// </summary>
/// <returns></returns>
public long GetDiskUseableSize()
{
GetDiskSize();
return m_nUseableSize;
}
#endregion
}
}
然后我写了一个接口实现刻录文件的功能：
public int BurnCD(string RecordPartition, string RecordFilePath, out string Excep)
{
IBurnCD Bcd = IBurnCD.CreateInstance();
List<string> StrRecorder = Bcd.GetRecorderList();
string PartitionName = StrRecorder.Find(
delegate(string Partition)
{
return Partition.Equals(RecordPartition);
}
);
if (String.IsNullOrEmpty(PartitionName))
{
Excep = "Specified partition is not exist!";
return 1;
}
if (!File.Exists(RecordFilePath))
{
Excep = "The file is not exist!";
return 2;
}
IRecorder Record = Bcd.GetRecorder(RecordPartition);
IBurnMedia BurnMedia = Record.AddMediaFile();
BurnMedia.Path = RecordFilePath;
BurnMedia.Type = MediaType.File;
bool bRet = Record.Burn(out Excep);
if (bRet)
return 0;
else
return 3;
}
上面的代码在刻录大概800M以下的文件没有问题，但是在刻录800M以上的文件的时候就会抛异常，提示“调用COM组件时失败”请哪位大侠指点？ --------------------编程问答-------------------- 上面的程序在msFormat.Write(fileStream as System.Runtime.InteropServices.ComTypes.IStream);
这条语句执行的时候抛异常了，调用COM组件失败，但是写小文件的时候不会抛异常，返回是成功的。请高手指点原因，不胜感激！高分送上！
补充：.NET技术 , C#
