public override Item encode()
{
byte[] buff = rule.buff;
int i = rule.i;
int flag = rule.flag;
Item item = new Item();
ushort gtag = (ushort)(buff[i] * 256 + buff[i + 1]);
ushort etag = (ushort)(buff[i + 2] * 256 + buff[i + 3]);
string tag = "(" + gtag.ToString("X4") + "," + etag.ToString("X4") + ")";
i += 4;
//为显式VR是解得VR的类型
String vrstring = Encoding.Default.GetString(buff, i, 2);
i += 2;
int len;
//为如下值时,len为2+4,先跳过前两的00 00 在按照LE取出剩下的四个值,解码的len
if (vrstring == "OB" || vrstring == "OW" || vrstring == "UT" || vrstring == "OW" || vrstring == "UN" || vrstring == "SQ")
{
i += 2;
len = (int)(buff[i + 0] << 24 + (buff[i + 1] << 16) + (buff[i + 2] << 8) + (buff[i + 3] << 0));
i += 4;
}
//不是上边的类型是,len为两个字节,按照LE接触len
else
{
len = (int)((buff[i + 0] << 8) + buff[i + 1]);
i += 2;
}
rule.i = i;
VRFactory vrf;
if (vrstring != "SQ")
{
vrf = new no_sqVRFactory();
}
else
{
vrf = new sqVRFactory();
}
try
{
VR vr = vrf.CreateVR(vrstring, rule, len);
string value = vr.ValueEncoding();
item.Tag = tag;
item.len = len;
item.Value = value;
return(item);
}
catch
{
throw new Exception();
}
}
public override Item encode()
{
int i = rule.i;
Item item = new Item();
ushort gtag = (ushort)(rule.buff[i] + rule.buff[i + 1] * 256);
ushort etag = (ushort)(rule.buff[rule.i + 2] + rule.buff[i + 3] * 256);
string tag = "(" + gtag.ToString("X4") + "," + etag.ToString("X4") + ")";
i += 4;
int len = (int)(rule.buff[i + 0] + (rule.buff[i + 1] << 8) + (rule.buff[i + 2] << 16) + (rule.buff[i + 3] << 24));
i += 4;
string vrstring = encodeVR(tag);//找出对应的VR
VRFactory vrf;
if (vrstring != "SQ")
{
vrf = new no_sqVRFactory();
}
else
{
vrf = new sqVRFactory();
}
rule.i = i;
VR vr = vrf.CreateVR(vrstring, rule, len);
string value = vr.ValueEncoding();
item.Tag = tag;
item.len = len;
item.Value = value;
return(item);
}