[英]NHapi: System.TypeInitializationException while creating MSH segment for QBP^Q21 message
我是 HL7 的新手,在實現某些功能時遇到了麻煩。
我正在努力實現的目標:
代碼如下所示:
(請注意:此代碼段僅包含查詢消息創建。我沒有包含使用 MLLP 發送創建的消息的代碼。)
using System;
using System.Globalization;
using NHapi.Model.V281.Message;
using NHapi.Base.Util;
namespace HealthLevel7
{
class QryMessageBuilder
{
private QBP_Q21 _qbpMessage;
public QBP_Q21 Build()
{
var currentDateTimeString = GetCurrentTimeStamp();
_qbpMessage = new QBP_Q21();
Terser terser = new Terser(_qbpMessage);
// Query by parameters: message segments here
CreateMshSegment(currentDateTimeString);
CreateQpdSegment(currentDateTimeString, terser);
CreateRcpSegment();
return _qbpMessage;
}
// Create MSH Segment
private void CreateMshSegment(string currentDateTimeString)
{
var mshSegment = _qbpMessage.MSH;
mshSegment.FieldSeparator.Value = "|";
mshSegment.EncodingCharacters.Value = "^~\\&";
mshSegment.SendingApplication.NamespaceID.Value = "my_sender";
mshSegment.SendingFacility.NamespaceID.Value = "my_app";
mshSegment.ReceivingApplication.NamespaceID.Value = "Dummy_HIS";
mshSegment.ReceivingFacility.NamespaceID.Value = "Dummy_Hospital";
mshSegment.DateTimeOfMessage.Value = currentDateTimeString;
mshSegment.MessageType.MessageCode.Value = "QBP";
mshSegment.MessageType.TriggerEvent.Value = "Q21";
mshSegment.MessageType.MessageStructure.Value = "QBP_Q21";
mshSegment.MessageControlID.Value = GetSequenceNumber();
mshSegment.ProcessingID.ProcessingID.Value = "P";
mshSegment.VersionID.VersionID.Value = "2.8.1";
}
// Create QPD Segment
private void CreateQpdSegment(string currentDateTimeString, Terser t)
{
// var patient = CreatePidSegment();
var qpdSegment = _qbpMessage.QPD;
t.Set("QPD-1-1", GetSequenceNumber());
t.Set("QPD-1-2", "Patient Query");
qpdSegment.QueryTag.Value = "Q001";
t.Set("QPD-3-1", "100000001");
t.Set("QPD-4-1", "Smith");
t.Set("QPD-4-2", "John");
t.Set("QPD-6", "19890419");
t.Set("QPD-7", "M");
}
// Create RCP Segment
private void CreateRcpSegment()
{
var rcpSegment = _qbpMessage.RCP;
rcpSegment.QueryPriority.Value = "I";
rcpSegment.QuantityLimitedRequest.Quantity.Value = "999";
rcpSegment.ResponseModality.Text.Value = "";
rcpSegment.ExecutionAndDeliveryTime.Value = "";
rcpSegment.ModifyIndicator.Value = "";
}
private static string GetCurrentTimeStamp()
{
// Return current timestamp
return DateTime.Now.ToString("yyyyMMddHHmmss", CultureInfo.InvariantCulture);
}
private static string GetSequenceNumber()
{
// Arbitrary facility number
const string facilityNumberPrefix = "1234";
return facilityNumberPrefix + GetCurrentTimeStamp();
}
}
}
我在調試時收到的錯誤:
我正在使用 MS Visual Studio 2019 社區版進行編碼和調試。
在函數private void CreateMshSegment(string currentDateTimeString)
,在var mshSegment = _qbpMessage.MSH;
行之后我放了一個斷點來檢查 MSH 段的樣子。
然后我在擴展mshSegment
如下錯誤。
完成執行后,我收到如下錯誤:
'HealthLevel7.exe' (CoreCLR: clrhost): Loaded 'C:\Program Files\dotnet\shared\Microsoft.NETCore.App\3.0.0\System.Configuration.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
Exception thrown: 'System.TypeInitializationException' in NHapi.Base.dll
Error occured while creating HL7 message The type initializer for 'NHapi.Base.PackageManager' threw an exception.
The program '[16976] HealthLevel7.exe: Program Trace' has exited with code 0 (0x0).
The program '[16976] HealthLevel7.exe' has exited with code 0 (0x0).
我在 HL7 湯中看到了什么:
我收到如下消息:
我很好奇MSH之前那個VT是什么!
並且,響應顯示為:
如果我的問題太愚蠢,請原諒我,我被卡住了,希望能提供有關可能導致此錯誤的任何提示。
HL7消息由所以稱為M inimal大號奧爾大號艾爾P rotocol(MLLP)enframed。
VT是 MLLP 的標頭,用於包裝您的 HL7 消息。 來自healthstandards.com
這些頭和尾通常是不可打印的字符,通常不會出現在 HL7 消息的內容中。
標題是一個垂直制表符VT,其十六進制值為 0x0b。 尾部是一個文件分隔符FS (十六進制 0x1c),后面緊跟一個回車CR (十六進制 0x0d)
因此,您的消息似乎錯過了預告片。
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