using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.IO;

namespace?SegyRead
{
????public?class?SegYReader
????{
????????private?SegyVolumeHeader?volumeHeaderStruct;
????????public?List?traceData;
????????private?string?fileNamePath;

????????public?SegYReader（string?fileNamePath）
????????{

????????????this.fileNamePath?=?fileNamePath;
????????????this.traceData?=?new?List（）;

????????}
????????//讀取卷頭信息
????????private?void?ReadVolumeHeader（Stream?stream）
????????{
????????????byte[]?temp?=?new?byte[18];
????????????stream.Seek（12?SeekOrigin.Current）;
????????????stream.Read（temp?0?18）;
????????????Tools.SwapNybbleByteOrder（ref?temp?0?9）;
????????????volumeHeaderStruct?=?（SegyVolumeHeader）Tools.BytesToStruct（temp?volumeHeaderStruct.GetType（））;
????????}

????????public?void?Read（）
????????{
????????????Stream?stream?=?null;
????????????FileStream?fileStream?=?null;

????????????if?（!File.Exists（fileNamePath））
????????????{
????????????????throw?new?Exception（“文件不存在“）;
????????????}
????????????else
????????????{
?????????????????fileStream?=?new?FileStream（fileNamePath?FileMode.Open）;
????????????}
????????????if?（fileStream.Length?????????????{
????????????????fileStream.Dispose（）;
????????????????throw?new?Exception（“文件格式不正確“）;
????????????}
????????????else
????????????{
????????????????stream?=?new?MemoryStream（）;
????????????????fileStream.CopyTo（stream）;
????????????????fileStream.Dispose（）;

????????????????stream.Seek（3200?SeekOrigin.Begin）;
????????????????this.ReadVolumeHeader（stream）;
????????????????switch?（volumeHeaderStruct.data_sample_format_code）
????????????????{
????????????????????case?1:
????????????????????????ReadSampleDataOfIBM（stream）;
????????????????????????break;//采樣數據格式為IBM4字節浮點型
????????????????????case?5:
????????????????????????ReadSampleDataOfIEEE（stream）;
????????????????????????break;//采樣數據位4字節IEEE浮點數
????????????????}

????????????????stream.Dispose（）;
????????????}
????????????????

????????}

????????private?void?ReadSampleDataOfIBM（Stream?stream）
????????{
????????????byte[]?tempWord?=?new?byte[4];
????????????byte[]?tempNybble?=?new?byte[2];
????????????int?traceIndex;
????????????int?sampleNum;
????????????int?sampleInterval;
????????????float[]?sampleData;

????????????stream.Seek（3600?SeekOrigin.Begin）;
????????????while?（stream.Position?????????????{
????????????????//讀取道號
????????????????stream.Read（tempWord?0?4）;????????????????
????????????????Tools.SwapWordByteOrder（ref?tempWord?0?1）;
????????????????traceIndex?=?BitConverter.ToInt32（tempWord?0）;
????????????????//讀取道采樣點數
????????????????stream.Seek（110?SeekOrigin.Current）;
????????????????stream.Read（tempNybble?0?2）;
????????????????Tools.SwapNybbleByteOrder（ref?tempNybble?0?1）;
????????????????sampleNum?=?BitConverter.ToInt16（tempNybble?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????9216??2014-06-03?17:54??SegReader\SegReader\bin\Debug\SegReader.dll

?????文件??????26112??2014-06-03?17:54??SegReader\SegReader\bin\Debug\SegReader.pdb

?????文件???????5605??2014-06-03?17:54??SegReader\SegReader\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件????????674??2014-04-12?09:43??SegReader\SegReader\obj\Debug\SegReader.csproj.FileListAbsolute.txt

?????文件???????9216??2014-06-03?17:54??SegReader\SegReader\obj\Debug\SegReader.dll

?????文件??????26112??2014-06-03?17:54??SegReader\SegReader\obj\Debug\SegReader.pdb

?????文件???????1370??2012-03-14?15:15??SegReader\SegReader\Properties\AssemblyInfo.cs

?????文件???????2483??2012-05-03?09:42??SegReader\SegReader\SegReader.csproj

?????文件???????4014??2012-05-03?09:38??SegReader\SegReader\SegYReader.cs

?????文件???????1200??2012-03-14?15:16??SegReader\SegReader\SegyTraceData.cs

?????文件???????7748??2012-03-14?15:16??SegReader\SegReader\SegyTraceHeader.cs

?????文件???????3596??2012-03-14?15:16??SegReader\SegReader\SegyVolumeHeader.cs

?????文件???????5348??2012-05-03?09:21??SegReader\SegReader\Tools.cs

?????文件????????917??2012-03-14?15:15??SegReader\SegReader.sln

????..A..H.?????27136??2014-06-03?17:55??SegReader\SegReader.suo

?????目錄??????????0??2012-08-08?14:49??SegReader\SegReader\obj\Debug\TempPE

?????目錄??????????0??2012-08-17?16:00??SegReader\SegReader\bin\Debug

?????目錄??????????0??2012-08-08?14:49??SegReader\SegReader\bin\Release

?????目錄??????????0??2014-06-03?17:54??SegReader\SegReader\obj\Debug

?????目錄??????????0??2012-08-17?16:00??SegReader\SegReader\bin

?????目錄??????????0??2012-08-17?16:00??SegReader\SegReader\obj

?????目錄??????????0??2012-08-17?16:00??SegReader\SegReader\Properties

?????目錄??????????0??2012-08-17?16:00??SegReader\SegReader

?????目錄??????????0??2012-08-17?16:00??SegReader

-----------?---------??----------?-----??----

???????????????130747????????????????????24