ssrs code 39

ssrs code 39

how to create barcode in ssrs report, ssrs code 39

pdf page to image c# itextsharp, qr code reader java download, scan barcode asp.net mobile, asp.net code 39, winforms code 39 reader, vb.net code 128 barcode generator, read data from barcode scanner in .net c# windows application, crystal reports data matrix, winforms ean 128 reader, .net pdf 417

If the function you are calling via a delegate takes a long time to execute, you may want your code to perform other work while the called function is executing asynchronously on another thread. The .NET Framework provides support for calling delegates asynchronously, using a worker thread to call the function indicated by the delegate and allowing the initiating thread to continue with other work. Instead of using the Invoke method, use the BeginInvoke method to initiate the function call, and later in your code, call EndInvoke to retrieve the result. A variety of design patterns may be used. If you simply have a few other tasks to complete, you can perform those tasks and then simply wait for the result by calling EndInvoke. When EndInvoke is called before the worker thread has completed its work, execution on the main thread will block waiting for the function to complete. You can also poll the secondary thread, enabling you to continue working and keep checking the secondary thread until it s done. Another design pattern allows you to set up a callback function that is called when the function called by the delegate completes. The BeginInvoke has a signature that is determined by the delegate declaration. BeginInvoke has the same parameters as the usual Invoke function, plus two additional parameters: the first is an AsyncCallback class and the second is the delegate. EndInvoke has only one parameter of type IAsyncResult. So, for example if you have a delegate like this one: delegate void MyDelegate(R^ r); the invoke methods have the following signatures: AsyncResult^ BeginInvoke(R^, AsyncCallback^, MyDelegate^ ); void EndInvoke(IAsyncResult^);

Figure 2 47. Sample solution secondary orchestration How do you access incoming documents wrapped in SOAP envelopes Incoming documents can be wrapped in a SOAP envelope (by an external client to BizTalk), but by default, only those that are delivered via a SOAP transport receive location will be automatically promoted and made available within an orchestration. For example, with orchestrations exposed as web services, additional properties can be set at the SOAP Header level using the BizTalk Web Services Publishing Wizard. These properties are then available to any client who calls the web service, accessible in the same way as all of the standard web methods and properties. However, if the delivery of a message wrapped in a SOAP envelope via a different transport is required (such as MSMQ or file drop), you need to use a custom pipeline component. Listing 2 5 demonstrates a process to promote incoming values to the SOAPHeader property schema. This example is a complete custom pipeline intended to be placed on the decode stage of a BizTalk custom pipeline, followed by a standard XML disassembler. It demonstrates how to do the following: Load the incoming message stream into an XML document, which can be accessed via the Document Object Model (DOM). Load the MessageId value located at the Header level of the incoming SOAP envelope. The incoming message matches the structure of the document shown in Listing 2 3. Promote the field to the SOAP Header, and make it available once the document is delivered to the MessageBox. Return the document within the Body of the SOAP envelope as a stream.

birt code 39, word ean 13 font, birt data matrix, birt ean 13, birt code 128, upc-a barcode font for word

Listing 2 5. Pipeline Property Promotion public IBaseMessage Execute(IPipelineContext pc, IBaseMessage inmsg) { try { string strMessageId = ""; // declare XML Document System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument(); // prepare the fields to be promoted xmlDoc.Load(inmsg.BodyPart.Data); // if values are not present, default to empty string try { strMessageId = xmlDoc.SelectSingleNode ("//*[local-name()='Header'/*[local-name()='MessageID']"). InnerText; } catch {} // strip off the envelope and return just what is within the Body System.IO.MemoryStream ms = new System.IO.MemoryStream(System.Text.Encoding.UTF8.GetBytes (xmlDoc.SelectSingleNode("//*[local-name()='Body']").InnerXml)); inmsg.BodyPart.Data = ms; // promote the SOAP Header fields inmsg.Context.Promote("MessageId", "http://schemas.microsoft.com/BizTalk/2003/SOAPHeader" .ToString(),strMessageId); } catch (Exception ex) { throw new Exception("Pipeline component exception - " + ex.Message); } return inmsg; }

The classes AsyncCallback and AsyncResult and the associated interface IAsyncResult provide the methods needed to implement these designs, such as providing a way to check on whether the function has completed. The BeginInvoke function returns an object of type AsyncResult. Listing 7-14 shows an example. Listing 7-14. Checking Function Completion // async_delegates.cpp using namespace System; using namespace System::Threading; ref class R { public: property String^ Value; R(String^ s) { Value = s; } }; delegate void QueryFunc(String^, R^); ref class Document { IAsyncResult^ result; R^ m_r; public: Document(String^ s) { m_r = gcnew R(s); } // Query the database. void Query(String^ queryString, R^ r) { // Execute a long query. r->Value = "New Value"; } void InitiateQuery(String^ queryString) { QueryFunc^ qf = gcnew QueryFunc(this, &Document::Query); Console::WriteLine(m_r->Value); result = qf->BeginInvoke(queryString, m_r, gcnew AsyncCallback(this, &Document::ProcessResult), qf); }

At the core of integration projects is the need to exchange data. When systems are required to pass data, the data must either be in a common format or the systems must have a way in which to map the data from one system to another. Historically, mapping was spread across multiple components and entities, such as the database layer, the data access layer, and even the publishing and consuming systems themselves. When additional systems were added to the integration, or requirements around the mapping logic changed, many systems and components involved in the integration would need to be customized. Integration applications, such as BizTalk Server, offer a centralized and organized platform for handling mapping and provide tools to aid in the development of these mappings.

Note There is a book focused solely on mapping, Pro Mapping in BizTalk Server 2009 (Apress, 2009). Make sure

gocr c#, c# .net core barcode generator, asp.net core barcode scanner, barcode in asp net core