C# 从HL7中提取PDF

我正在用C语言编写一个程序，它将解析HL7消息并将数据写入文本文件。HL7还包含base64格式的嵌入式PDF。我必须解码base64编码的pdf，它也是

        string fileLocation = @"hl7file.hl7";

        var message = File.ReadAllText(fileLocation);

        PipeParser parser = new PipeParser();

        IMessage m = parser.Parse(message);//str message will contain your HL7 Message
        ADT_A03 adtA02 = m as ADT_A03;

        ORU_R01 oru = m as ORU_R01;
        ORU_R01_PATIENT patient = oru.GetPATIENT_RESULT().PATIENT;

        ORU_R01_ORDER_OBSERVATION orderObservation = oru.GetPATIENT_RESULT().GetORDER_OBSERVATION();
        OBR obr = orderObservation.OBR;

        PID pid = patient.PID;

        string PatientId = pid.GetPatientIdentifierList(0).IDNumber.ToString();

        ORU_R01_OBSERVATION observation = orderObservation.GetOBSERVATION(0);
        OBX obx = observation.OBX;


        var pdfFile = obx.GetObservationValue(0).data;

        Dictionary<string, string> hl7Data = new Dictionary<string, string>();

        hl7Data.Add("Patient ID", PatientId = pid.GetPatientIdentifierList(0).IDNumber.ToString());
        hl7Data.Add("Last_Name", pid.GetPatientName(0).FamilyName.Surname.Value);
        hl7Data.Add("First_Name", pid.GetPatientName(0).GivenName.Value);
        hl7Data.Add("DOB", pid.DateTimeOfBirth.Time.ToString());
        hl7Data.Add("Sex", pid.AdministrativeSex.Value);
        hl7Data.Add("Address", pid.GetPatientAddress(0).StreetAddress.StreetOrMailingAddress.Value);
        hl7Data.Add("City", pid.GetPatientAddress(0).City.Value);
        hl7Data.Add("State", pid.GetPatientAddress(0).StateOrProvince.Value);
        hl7Data.Add("Zip_Code", pid.GetPatientAddress(0).ZipOrPostalCode.Value);
        hl7Data.Add("Signature_Required", obr.PriorityOBR.Value);
        hl7Data.Add("Referring_Physician_Last_Name", obr.GetOrderingProvider(0).FamilyName.Surname.Value);
        hl7Data.Add("Referring_Physician_First_Name", obr.GetOrderingProvider(0).GivenName.Value);
        hl7Data.Add("NPI", obr.GetOrderingProvider(0).IdentifierTypeCode.Value);
        hl7Data.Add("Observation_Date", obr.ObservationDateTime.Time.ToString());
        hl7Data.Add("File_Type", obr.UniversalServiceIdentifier.Identifier.Value);
        hl7Data.Add("File_Description", obr.UniversalServiceIdentifier.Text.Value);

        using (StreamWriter file = new StreamWriter(@"C:\Users\samin.khan\Desktop\myfile.txt"))
        {
            foreach (var entry in hl7Data)
            {
                file.WriteLine("{0}: {1}", entry.Key, entry.Value);
            }
        }

图片：

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在将其转换为ED（封装数据）对象后：

仅离开原始屏幕截图，您应该能够执行以下操作：

var ed = axc.Data as ED;
if (ed != null)
{
    var bytes = Convert.FromBase64String(ed.Data);
    File.WriteAllBytes("SomeFileName.pdf", bytes);
}

---

谢谢大家

您是从base64解码的吗？还没有，因为我无法访问obx.GetObservationValue（0）.Data。当我设置断点时，我可以看到它，但无法使用var、obx.GetObservationValue（0）分配base64值字符串/var。数据显示为一个对象。你的意思是你在尝试解码变量Pdfile时出错？查看任何对象的属性，它看起来都像是你拥有的基本对象。指定了一个

TypeName

属性，您可能需要将其转换为该类型以提供所需的属性

ED

在我看来，它可能意味着电子文档。检查是否有可以强制转换的

ED

类。假设您没有将

数据

视为可访问属性。我没有收到任何错误。我看到附加的图像（鼠标悬停在pdffile上）当它到达断点时。我需要将数据=“jvberi0xljkjdp0zoekmasawig9iago8paovq3jlyxrvcihuzwxlcmlri…”保存到字符串中。

var ed = axc.Data as ED;
if (ed != null)
{
    var bytes = Convert.FromBase64String(ed.Data);
    File.WriteAllBytes("SomeFileName.pdf", bytes);
}

        ED embeddedPDF = (ED)obx.GetObservationValue(0).Data;

        if (embeddedPDF != null)
        {
           var bytes = Convert.FromBase64String(embeddedPDF.Data.Value);
           File.WriteAllBytes("SomeFileName.pdf", bytes);
        }