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EntityManager Constructor(EntityManagerContext)
Example 


IdeaBlade.EntityModel Assembly > IdeaBlade.EntityModel Namespace > EntityManager Class > EntityManager Constructor : EntityManager Constructor(EntityManagerContext)
EntityManager constructor parameters
Initialize a new instance of the EntityManager class.
Syntax
'Declaration
 

Public Function New( _
   ByVal context As EntityManagerContext _
)
'Usage
 

Dim context As EntityManagerContext
 
Dim instance As New EntityManager(context)
public EntityManager( 
   EntityManagerContext context
)

Parameters

context
EntityManager constructor parameters
Exceptions
ExceptionDescription
IdeaBlade.Core.IdeaBladeExceptionThrown for miscellaneous initialization failures
EntityServerExceptionThrown for connection failures
System.ArgumentExceptionThrown in a Silverlight application when BOS is not specified
Remarks
No connection to data sources is made during EntityManager initialization.

An EntityManagerCreated event is fired upon creation.

Example
private bool Initialize() {
      string runTimeEnv;
#if TEST
      runTimeEnv = "Test";
#else
      runTimeEnv = "Prod";
#endif

      // Initialize an EntityManager for the given data source extension, and set up an error handler.
      IdeaBladeTest1Manager mgr = new IdeaBladeTest1Manager(false, runTimeEnv);
      mgr.EntityServerError += EntityServerErrorHandler;

      // Explicitly connect to the BOS now.
      // Note that no data source connection is made until entities are accessed.
      try {
        mgr.Connect();
      } catch (EntityServerException ese) {
        MessageBox.Show(ese.Message, "EntityServerException");
      } catch (Exception e) {
        MessageBox.Show(e.Message, "Exception");
      }
      return mgr.IsConnected;
    }
    private void EntityServerErrorHandler(object pSender, EntityServerErrorEventArgs e) {
      // Always a good idea to log all exception info.
      Exception ex = e.Exception;
      while (ex != null) {
        TraceFns.WriteLine(ex.ToString());
        ex = ex.InnerException;
      }
      MessageBox.Show("Trying to handle error");
      // Leave e.Handled = false if the Error should be thrown back to the calling code
      e.Handled = true;         // exception will not be thrown
    }
Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also

Reference

EntityManager Class
EntityManager Members
Overload List

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