BizTalk动手实验（十一）自定义开发管道组件

更多内容请查看：BizTalk动手实验系列目录

BizTalk 开发系列

1 课程简介

通过本课程熟悉自定义开始管道组件的流程、各组件接口的功能作用以及自定义管道。

本场景为开发一个消息ZIP压缩的发送管道组件。

2 准备工作

1. 熟悉管道组件各阶段组成

2. 下载Ionic.ZIP 组件（http://dotnetzip.codeplex.com/），使用如下代码部署到GAC中。

"C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Bin\NETFX 4.0 Tools\gacutil.exe" /i "｛Path｝\Ionic.Zip.dll" /F

3 演示

1. 创建空解决方案ZipEncoder

2. 创建组件类库

3. 为类库添加签名

4. 添加自动部署GAC脚本，在项目属性Build Events的Post-build event command line里输入下列命令

"C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Bin\NETFX 4.0 Tools\gacutil.exe" /i "$(TargetPath)" /F

5. 引用Microsoft.BizTalk.Pipeline组件（C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\PublicAssemblies\Microsoft.BizTalk.Pipeline.dll）及Ionic.Zip组件（需部署到GAC中）

6. 重命名Class1.cs为ZipEncoderComponent.cs

7. 拷贝以下代码替换ZipEncoder

View Code

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Xml;

using System.IO;

using Microsoft.BizTalk.Message.Interop;

using Microsoft.BizTalk.Component.Interop;

using Ionic.Zip;

namespace ZipEncoderComponent

{

[ComponentCategory(CategoryTypes.CATID_PipelineComponent)]

[ComponentCategory(CategoryTypes.CATID_Encoder)]

[System.Runtime.InteropServices.Guid("bb93175b-ef93-4277-b725-4e835d48a57b")]

public class ZipEncoderComponent : IBaseComponent, IComponentUI, IPersistPropertyBag, IComponent

{

#region IBaseComponent

public string Description

{

get { return "zip encoder component"; }

}

public string Name

{

get { return "ZipEncoder"; }

}

public string Version

{

get { return "1.0"; }

}

#endregion

#region IComponentUI

public IntPtr Icon

{

get { return new IntPtr(); }

}

public System.Collections.IEnumerator Validate(object projectSystem)

{

return null;

}

#endregion

#region IPersistPropertyBag

private string _password;

private string _entryExtension;

public string Password

{

get { return _password; }

set { _password = value; }

}

public string EntryExtension

{

get { return _entryExtension; }

set { _entryExtension = value; }

}

public void GetClassID(out Guid classID)

{

classID = new Guid("62ab1278-2a73-49ea-832c-740e045a2d7d");

}

public void InitNew()

{

}

public void Load(IPropertyBag propertyBag, int errorLog)

{

object val1 = null;

object val2 = null;

try

{

propertyBag.Read("Password", out val1, 0);

propertyBag.Read("EntryExtension", out val2, 0);

}

catch (ArgumentException)

{

}

catch (Exception ex)

{

throw new ApplicationException("Error reading PropertyBag: " + ex.Message);

}

if (val1 != null)

_password = (string)val1;

if (val2 != null)

_entryExtension = (string)val2;

else

_entryExtension = "xml";

}

public void Save(IPropertyBag propertyBag, bool clearDirty, bool saveAllProperties)

{

object val1 = (object)_password;

object val2 = (object)_entryExtension;

propertyBag.Write("Password", ref val1);

propertyBag.Write("EntryExtension", ref val2);

}

#endregion

#region IComponent

public IBaseMessage Execute(IPipelineContext pContext, IBaseMessage pInMsg)

{

IBaseMessagePart bodyPart = pInMsg.BodyPart;

if (bodyPart != null)

{

Stream originalStream = bodyPart.GetOriginalDataStream();

if (originalStream != null)

{

MemoryStream memStream = new MemoryStream();

using (ZipOutputStream zipOutputStream = new ZipOutputStream(memStream))

{

byte[] buffer = new Byte[1024];

zipOutputStream.CompressionLevel = Ionic.Zlib.CompressionLevel.BestCompression;

if (_password != null)

zipOutputStream.Password = _password;

if (_entryExtension != null)

if (_entryExtension.Length > 0)

_entryExtension = "." + _entryExtension;

zipOutputStream.PutNextEntry(pInMsg.MessageID + _entryExtension);

int bytesRead = 1024;

while (bytesRead != 0)

{

bytesRead = originalStream.Read(buffer, 0, buffer.Length);

zipOutputStream.Write(buffer, 0, bytesRead);

}

}

byte[] buff = memStream.GetBuffer();

MemoryStream ms = new MemoryStream(buff);

ms.Position = 0;

pInMsg.BodyPart.Data = ms;

}

}

return pInMsg;

}

#endregion

}

}

8. 创建BizTalk项目BTSZipApp（配置应用名称、密钥）

9. 新建发送管道SendZipPipeline

10. 打开SendZipPipeline，在管道设计器右侧工具栏中右键点击“Choose Items”