#.NET

Hi all,

I trying build a project with .NET and Entity Framework in the Code First method, but Caché return the error " 'VARBINARY' is not a supported type for CAST" when run this sql code:

INSERT "dbo"."__MigrationHistory" 
       ( 
              "MigrationId", 
              "ContextKey", 
              "Model", 
              "ProductVersion" 
       ) 
       VALUES 
       ( 
              '201706131048154_InitialCreate', 
              'CACHE2.SchoolContext', 
              cast( 0x1F8B0800000000000400CD59CD6EE33610BE17E83B083A1 ... d89cc74ff4e1285e7df81769242ce52e1f0000 AS varbinary(1549)),
              '6.1.3-40302' 
       )

  The following code in .Net using  CacheObject.dll  version 2016.1.2.206 com library

                  ConnectionString  =  "cn_iptcp:10.56.135.160[1972]:PHDEMO:PHSYSADM:***********" 

                  b = factory.Connect(ConnectionString  )
                  objCacheObject =  factory.Static("CacheObjectConnection")     
                  clist  = factory.GetConnectionList()

  for the above code, b is true and clist is  Local,cn_iptcp:127.0.0.1[1972]: 

Why isn't the 10.56.135.160 in the connection list?  Next the program runs a function written an early version of Cache.

Imagine that your .NET project uses the Caché DBMS and you need a fully-functional and reliable authorization system. Writing such a system from scratch would not make much sense, and you will clearly want to use something that already exists in .NET, e.g. ASP.NET Identity. By default, however, this framework supports only its native DBMS – MS SQL. Our task was to create an adaptor that would let us quickly and easily port Identity to the InterSystems Caché DBMS. This work resulted in creation of the ASP.NET Identity Caché Provider.

MSSQL is the default data provider for ASP.

Recently I came across a very strong statement to the effect that InterSystems.Data.CacheClient.dll library works fast because it does not open a TCP/IP connection, instead it works in the same process as a database. It made me pause for quite some time. Firstly because .Net Managed Provider, which utilises this library, opens TCP/IP connection to the database (and it is stated in the documentation "Using .NET and the ADO.NET Managed Provider with Caché"). And secondly, because as far as I know only eXtreme applications attach themselves to the process.

I have posted to aid others in diagnosing problem with SSL/TLS connections to superserver port from .NET client executable.

The cache instance this appeared on is quite old - 2011 - so I do not know if Intersystems have added a better error message in a later version

The actual fault was due to the certificate in the %SuperServer SSL/TLS configuration having expired.

The unhelpful message that appeared in the .NET client included the following partial stack trace.

   *** CacheException..ctor: (12:05:09:546) [ConnID= 34822912] [SvrJob=Unknown] [ThreadID=9]
 [CacheProvider] Communication link failure: System.ArgumentNullException; Value cannot be null.
 NativeError: 461  State: 08S01
 InnerException StackTrace: 
   at System.Threading.Monitor.Enter(Object obj)
   at InterSystems.Data.CacheClient.SysList.dumpData(Stream outStream, Int32 count, LogFileStream logFile)
   at InterSystems.Data.CacheClient.OutStream.send(Int32 count)
   at InterSystems.Data.CacheClient.CacheADOConnection.Login()
   at InterSystems.Data.CacheClient.CachePool.CreateNewPooledConnection(CacheADOConnection conn)

How can I prevent large number truncation when using the DynamicObject and DynamicArray classes to create JSON in objectscript and then parsing the result in javascript. Are there any global settings that configure the output when using these classes?

I am looking at converting to the new DynamicObject and DynamicArray classes to build JSON. Our current (homegrown) JSON library forces string representation of numbers too long because of errors we were seeing with long numbers being truncated on the client, I am hoping to accomplish the same with the new classes.

Microsoft Office has components for using in third party applications: COM Objects for C++ and Interop Assemblies for .Net programming.

Many Cache projects used to include calls to those libraries. However, recently this solution started being problematic.

There are two main reasons - legal and technical. Let’s check the details.

Microsoft technology support

Microsoft is supporting Office Automation only for desktop computing. 

It shall not be used for server computing, as they offer Sharepoint for this scenario.

Hi,

We have created a dll with .Net that generates a MS Word document with a template. The .Net method works, we have tested it with Visual Studio and it generates the document.

But once we have created the dll and embebed it in Ensemble through the Wizard, when we try to execute the method that generates the document, it doesn't work. It doesn't throw us an error, it simply doesn't open the template.

We have seen that MS Word program is opened, but that's all.

We are using Microsoft.Office.Interop to generate the Word document. It must be Word 97 version document.

What are we missing?

I need to pass an equivalent of .Net Dictionary<string, int> instance from .Net to Caché. In the application, the Caché .Net provider has been used so far, so we came up with passing it as an instance of array of data types. However, the only way to fill the array we are aware of is to use its Add() method which invokes a call to the server instance method of the array for every key-value pair inserted.

Is there any way to fill the array at once - inserting all the pairs in one server call? Alternatively, is their any other .Net (Provider or eXTreme) API we can use for this task?

Presenter: Jeff Semmens
Task: Model and access data as objects in .NET without designing the database first
Approach: Use InterSystems Entity Framework
 

Description: Come and experience how you can design your database model in .NET and evolve it over time by leveraging the Entity Framework.

Problem: Current bindings require database-first design. I cannot design my model in .NET.

Solution: The Entity Framework is an object-relational mapping framework that allows data-oriented applications to model and access their data as objects in .NET. Database- first is still supported but will fade away in future releases.

Content related to this session, including slides, video and additional learning content can be found here.

Hello all,

I know it is perhaps too vague question, but anyway:

Do you have experience from running a thick (preferably .NET) application in any of these modes - client installed locally, Terminal Server, Citrix ? Say, there are around 300-400 concurrent users using application.

Can you share your observations / opinions?

Thank you!
 

Dan Kutac 

Hi,

We do have a production including a SOAP.OutboundAdapter that make a request to a .NET WCF Service. The response from that service vary in size. When it come to large one, we talk about maybe 8000 records (with 6-8 attributes per record) in xml, the adapter always give a timout. Even if we put a high number of seconds or set -1. After 1 1/2h still nothing get back. It's just standing there and waiting for ever.

Our .NET developer have look at it (on the WCF-service)  and from ther point of view they say that it seems like Ensemle can't handle such big responses.

In .Net it.