GetFirst Method (original) (raw)
Summary
Returns the first DicomVR item in the Value Representation Table.
Syntax
C#
Objective-C
C++/CLI
Java
@property (nonatomic, strong, readonly, nullable) LTDicomVR *first; public DicomVr getFirst() Return Value
DicomVR class that contains the first item in the Value Representation Table.
Example
using Leadtools;
using Leadtools.Dicom;
public void TestVRTable()
{
//Make sure to initialize the DICOM engine, this needs to be done only once
//In the whole application
DicomEngine.Startup();
//We don't need to call this since the DicomEngine.Startup already does that for us
//These calls are for demonstration purposes only
DicomVRTable.Instance.Reset();
DicomVRTable.Instance.Default();
//We can also call FindByIndex if we know the index of this VR
DicomVR vr = DicomVRTable.Instance.Find(DicomVRType.AE);
DicomVRTable.Instance.Delete(vr);
DicomVR vr1 = DicomVRTable.Instance.Insert(DicomVRType.AE, "My AE VR", 16, DicomVRRestriction.StringFixed, 1);
Debug.Assert(DicomVRTable.Instance.Exists(vr1) == true);
DicomVRTable.Instance.SetName(vr1, "My New AE VR");
int count = 0;
//If we want to loop through all the VRs in the table we can do this:
vr = DicomVRTable.Instance.GetFirst();
while (vr != null)
{
// We can also access the rest of the properties of DicomVR in here,
// such as DicomVRType.Code, DicomVRType.Length, DicomVRType.Name,
// DicomVRType.Restriction and DicomVRType.UnitSize
if (vr.Code == DicomVRType.AE)
{
Console.WriteLine(vr.Name);
}
count++;
vr = DicomVRTable.Instance.GetNext(vr);
}
//We can use GetLast and GetPrevious to achieve the same thing
Debug.Assert(count == DicomVRTable.Instance.GetCount());
DicomEngine.Shutdown();
}