使用LEADTOOLS 框架实现一个Storage Commit

打开 Visual Studio 2005.
选择文件->新建->项目.
在 新建项目 对话框中, 在项目类型列表中选择 Visual C# 或 VB , 并在模板列表中选择类库.
在项目名称字段中键入项目名称为SampleStorageCommit，然后单击确定。如果需要，键入项目的新位置或使用浏览按钮选择目录，然后单击确定。
在“解决方案资源管理器”窗口中，右键单击“引用”，然后从菜单中选择“添加引用”。在“添加引用”对话框中，选择“浏览”选项卡，然后转至 LEADTOOLS 19 \ Bin \ DotNet \ Win32文件夹，选择以下DLLS：
- Leadtools.dllLeadtools.Dicom.dll
- Leadtools.Dicom.AddIn.dll
- Microsoft.Practices.Unity
添加下面的 .NET 系统DLL:
System.Core (.NET 3.5 dll)
单击确定按钮将上述DLL添加到应用程序。
在"解决方案管理器" 窗口右击 "SampleAddIn" 选择 添加->类 . 在"新建项" 对话框中, 在"名称" 字段中键入 StorageCommitAddIn.cs . 点击 "添加" 按钮.

打开 StorageCommitAddIn.cs文件添加以下使用语句：

using Leadtools.Dicom; 
using Leadtools.Dicom.AddIn; 
using Leadtools.Dicom.AddIn.Interfaces; 
using Leadtools.Dicom.AddIn.Attributes; 
using Microsoft.Practices.Unity;

将IProcessNAction 添加到StorageCommitAddIn 类派生列表中。你的类应该如下所示：
C#
```
public class StorageCommitAddIn : IProcessNAction  
{ 
} 
```

将DicomAddInAttribute添加到类声明中。让服务知道该类处理Dicom消息。添加属性后，该类应该如下所示：

[DicomAddInAttribute("Storage Commit AddIn", "1.0.0.0", Description = "Implements Storage Commitment", Author = "")] 
public class StorageCommitAddIn : IProcessNAction 
{ 
}

右键单击IProcessNAction，然后从菜单中选择实现接口 - >实现接口。你的类现在应该如下：

public class StorageCommitAddIn : IProcessNAction 
{ 
   public DicomCommandStatusType OnNAction(DicomClient Client, byte PresentationId, int MessageID, string AffectedClass, string Instance, int Action, DicomDataSet Request, DicomDataSet Response) 
   { 
      throw new Exception("The method or operation is not implemented."); 
   } 
                     
   #endregion 
   #region IProcessBreak Members 
   public void Break(BreakType type) 
   { 
      throw new Exception("The method or operation is not implemented."); 
   } 
}

要告诉服务器我们感兴趣的响应, 我们需要通过OnNAction方法指定PresentationContextAttributes。这将允许服务器构建一个在客户端连接时使用的association 。为了支持存储提交，我们需要确保对OnNAction方法属性如下：

[PresentationContext(DicomUidType.StorageCommitmentPushModelClass, DicomUidType.ImplicitVRLittleEndian)] 
public DicomCommandStatusType OnNAction(DicomClient Client, byte PresentationId, int MessageID, string AffectedClass, string Instance, int Action, DicomDataSet Request, DicomDataSet Response) 
{ 
   throw new Exception("The method or operation is not implemented."); 
}

将以下支持属性添加到StorageCommitAddIn类中：

private IDicomRequest _DicomRequest; 
/// <summary> 
/// Allows the user to send a DICOM request from an addin. 
/// </summary> 
/// <value>The dicom request.</value> 
[Dependency]  
public IDicomRequest DicomRequest 
{ 
   set 
   { 
      _DicomRequest = value; 
   } 
} 
private IAETitle _AeTitle; 
/// <summary> 
/// Let's get the AE title information. 
/// </summary> 
/// <value>The AE title.</value> 
[Dependency] 
public IAETitle AeTitle 
{ 
   set 
   { 
      _AeTitle = value; 
   } 
}

上述代码使用Microsoft Unity依赖注入来获取实现我们的插件所需功能的注册接口。例如，IDicomRequest接口由Leadtools.Dicom.Server.exe实现。

添加IProcessNAction接口的代码。示例代码在单独的线程上处理提交请求，并在稍后响应客户端。有关存储提交的完整工作示例，请参阅作为LEADTOOLS PACS Framework的一部分安装的Storage Commit加载项。您的代码应如下所示：

[PresentationContext(DicomUidType.StorageCommitmentPushModelClass, DicomUidType.ImplicitVRLittleEndian)]  
public DicomCommandStatusType OnNAction(DicomClient Client, byte PresentationId, int MessageID, string AffectedClass, string Instance, int Action, DicomDataSet Request, DicomDataSet Response)  
{  
   DicomDataSet ds = new DicomDataSet(Client.Server.TemporaryDirectory); 
                     
   // Copy the dataset. We will be using it in a thread so we need to copy  
   // it so will be available in the thread.  
   ds.Copy(Request, null, null); 
                     
   // Process the commit on a separate thread. This will allow us to immediately  
   // return a notification to the client informing that we have received the  
   // message.  
   result = AsyncHelper.Execute(delegate() 
   {  
      DicomDataSet commitDS = new DicomDataSet(Client.Server.TemporaryDirectory); 
      PresentationContext pc = new PresentationContext(); 
      DicomRequest request = new DicomRequest(Client); 
                 
      // At this point we would process the storage commit and build a response 
      // dataset. For a complete example of this refer to the sample storage commit 
      // add-in that ships with the LEADTOOLS PACS Framework. 
      // Prepare to send our response back to the requesting client 
      pc.AbstractSyntax = DicomUidType.StorageCommitmentPushModelClass;  
      pc.TransferSyntaxes.Add(DicomUidType.ImplicitVRLittleEndian); 
      request.PresentationContexts.Add(pc); 
      request.RequireMessagePump = true; 
      request.ReceiveNReportResponse += new ReceiveNReportResponseDelegate(request_ReceiveNReportResponse); 
      request.ConnectType = ConnectType.Conditional; 
      _DicomRequest.SendNReportRequest(request, PresentationId, 1000, DicomUidType.StorageCommitmentPushModelClass,  
      DicomUidType.StorageCommitmentPushModelInstance,1, commitDS); 
   }); 
                     
   Response = null;  
   return DicomCommandStatusType.Success;  
} 
                     
void request_ReceiveNReportResponse(DicomRequest request, byte presentationID, int messageID, string affectedClass, string instance, DicomCommandStatusType status, int dicomEvent, DicomDataSet dataSet) 
{ 
   // The LEADTOOLS PACS Framework provides a default implementation.  
}

添加对IProcessBreak界面的支持。这允许停止StorageCommit操作。将以下代码添加到您的StorageCommitAddin类中：

private AsyncResult result = null; 
public void Break(BreakType type) 
{ 
   // Stop the commit process if we received a request 
   // to stop processing 
   if(result != null && !result.IsCompleted) 
      result.Cancel(); 
}