//文件解码
public override List <DCMAbstractType> Decode(byte[] data, ref uint idx)
{
//打开filename文件，将文件内容读到缓冲区byte[] data
data = File.ReadAllBytes(filename);
//跳过128字节前导符(idx=128)
idx += 128;
//读取四字节标识，如不为“DICM”则结束
string s = Encoding.Default.GetString(data, (int)idx, 4);
if (s == "DICM")
{
idx += 4;
//用ExplicitVRLittleEndian对象实例化filemeta对象
filemeta = new DCMFileMeta(new ExplicitVRLittleEndian());
//通过其Decode方法从data中读取头元素
filemeta.Decode(data, ref idx);
//读取(0002,0010)头元素
string uid = Encoding.Default.GetString(filemeta[DCMLIB.DicomTags.TransferSyntaxUid].value);
//在tsFactory中找到对应的数据集传输语法对象赋给基类的syntax字段
foreach (TransferSyntax syn in tsFactory.TSs)
{
if ((syn.uid + "\0") == uid)
{
base.syntax = syn;
break;
}
}
//调用base.Decode方法解码数据集
return(base.Decode(data, ref idx));
}
else
{
return(base.Decode(data, ref idx));
}
}
public override List <DCMAbstractType> Decode(byte[] data, ref uint idx)
{
//打开filename文件，将文件内容读到缓冲区byte[] data
using (FileStream fs = File.OpenRead(filename))
{
data = new byte[fs.Length];
fs.Read(data, 0, (int)fs.Length);
}
//跳过128字节前导符(idx=128)，读取4字节的”DICM”
idx = 128;
//***
idx += 4;
//用ExplicitVRLittleEndian对象实例化filemeta对象，通过其Decode方法从data中读取头元素
syntax = new ExplicitVRLittleEndian();
filemeta = new DCMFileMeta(syntax);
filemeta.Decode(data, ref idx);
//读取(0002,0010)头元素即filemeta[DicomTags.TransferSyntaxUid]的值，
//在tsFactory中找到对应的数据集传输语法对象赋给基类的syntax字段
DCMDataElement synelem = (DCMDataElement)filemeta[DicomTags.TransferSyntaxUid];
syntax = tsFactory[synelem.ReadValue <String>()[0].Replace("\0", "")];
//调用base.Decode方法解码数据集
base.Decode(data, ref idx);
return(items);
}
public override List <DCMAbstractType> Decode(byte[] data, ref uint idx)
{
filemete = new DCMFileMeta(new ExplicitVRLittleEndian());
DCMAbstractType uid = filemete.Decode(data, ref idx).Find((DCMAbstractType type) => type.etag == 0x0010 && type.gtag == 0x0002);
string uid1 = uid.GetValue <string>();
TransferSyntax syn = TransferSyntaxs.All[uid1];
Data = new DCMDataSet(syn);
Data.Decode(data, ref idx);
return(items);
}
