Question

我创建了一个自定义管道组件，它将复杂的Excel电子表格转换为XML。转换工作正常，我可以写出要检查的数据。但是，当我将此数据分配给inMsg的BodyPart.Data部分或新消息时，我总是会遇到路由故障。当我在管理控制台中查看消息时，看起来正文包含二进制数据（我假设原始的excel）而不是我指定的XML - 请参阅下面的屏幕截图。我已经遵循了许多教程和许多不同的方法，但总是得到相同的结果。

Binary Returned

我目前的代码是：

public Microsoft.BizTalk.Message.Interop.IBaseMessage Execute(Microsoft.BizTalk.Component.Interop.IPipelineContext pc, Microsoft.BizTalk.Message.Interop.IBaseMessage inmsg)
    {


        //make sure we have something
        if (inmsg == null || inmsg.BodyPart == null || inmsg.BodyPart.Data == null)
        {
            throw new ArgumentNullException("inmsg");
        }

        IBaseMessagePart bodyPart = inmsg.BodyPart;

        //create a temporary directory
        const string tempDir = @"C:\test\excel";
        if (!Directory.Exists(tempDir))
        {
            Directory.CreateDirectory(tempDir);
        }

        //get the input filename
        string inputFileName = Convert.ToString(inmsg.Context.Read("ReceivedFileName", "http://schemas.microsoft.com/BizTalk/2003/file-properties"));


        swTemp.WriteLine("inputFileName: " + inputFileName);

        //set path to write excel file
        string excelPath = tempDir + @"\" + Path.GetFileName(inputFileName);
        swTemp.WriteLine("excelPath: " + excelPath);

        //write the excel file to a temporary folder  
        bodyPart = inmsg.BodyPart;
        Stream inboundStream = bodyPart.GetOriginalDataStream();
        Stream outFile = File.Create(excelPath);
        inboundStream.CopyTo(outFile);
        outFile.Close();

        //process excel file to return XML
        var spreadsheet = new SpreadSheet();
        string strXmlOut = spreadsheet.ProcessWorkbook(excelPath);

        //now build an XML doc to hold this data
        XmlDocument xDoc = new XmlDocument();
        xDoc.LoadXml(strXmlOut);

        XmlDocument finalMsg = new XmlDocument();
        XmlElement xEle;
        xEle = finalMsg.CreateElement("ns0", "BizTalk_Test_Amey_Pipeline.textXML",
                                      "http://tempuri.org/INT018_Workbook.xsd");
        finalMsg.AppendChild(xEle);

        finalMsg.FirstChild.InnerXml = xDoc.FirstChild.InnerXml;

        //write xml to memory stream
        swTemp.WriteLine("Write xml to memory stream");
        MemoryStream streamXmlOut = new MemoryStream();
        finalMsg.Save(streamXmlOut);
        streamXmlOut.Position = 0;


        inmsg.BodyPart.Data = streamXmlOut;
        pc.ResourceTracker.AddResource(streamXmlOut);


        return inmsg;
    }

Answer 1

我首先要在MemoryStream逻辑周围添加更多的日志记录 - 也许可以将文件写入文件系统，这样你就可以确保Xml版本正确。您还可以附加到BizTalk进程并逐步完成组件的代码，这使得调试变得更加容易。

我会尝试将MemoryStream的使用转换为为您编写字节的更基本的自定义流。在管道组件的BizTalk SDK示例中，有一些自定义流的示例。您必须自定义流示例，以便它只写入流。我可以发布一个例子。首先是上面的附加诊断。

谢谢，

Answer 2

以下是写回信息的示例：

    IBaseMessage Microsoft.BizTalk.Component.Interop.IComponent.Execute(IPipelineContext pContext, IBaseMessage pInMsg)
        {
            IBaseMessagePart bodyPart = pInMsg.BodyPart;          

 if (bodyPart != null)
            {      
using (Stream originalStrm = bodyPart.GetOriginalDataStream())
                {
                    byte[] changedMessage = ConvertToBytes(ret);
                    using (Stream strm = new AsciiStream(originalStrm, changedMessage, resManager))
                    {
                        // Setup the custom stream to put it back in the message.
                        bodyPart.Data = strm;
                        pContext.ResourceTracker.AddResource(strm);
                    }
                }
            }
     return pInMsg;
}

AsciiStream使用这样的方法来读取流：

override public int Read(byte[] buffer, int offset, int count)
        {
            int ret = 0;
            int bytesRead = 0;

            byte[] FixedData = this.changedBytes;

            if (FixedData != null)
            {
                bytesRead = count > (FixedData.Length - overallOffset) ? FixedData.Length - overallOffset : count;
                Array.Copy(FixedData, overallOffset, buffer, offset, bytesRead);


                if (FixedData.Length == (bytesRead + overallOffset))
                    this.changedBytes = null;

                // Increment the overall offset.
                overallOffset += bytesRead;
                offset += bytesRead;
                count -= bytesRead;
                ret += bytesRead;
            }

            return ret;
        }

Biztalk 2010自定义管道组件返回二进制文件

2 个答案: