Querverweise für STEP 7 abrufen - TIAPortal

Public void GetCrossReferences()

{

CrossReferenceService crossReferenceService = MainBlock.GetService<CrossReferenceService >();   CrossReferenceResult rootResultObject = xRefService.GetCrossReferences(CrossReferenceFilter.AllObjects);

SourceObjectComposition rootResultSourceObjects = rootResultObject.Sources; //The API returns a single source object but the type is a composition keeping LTS in mind.

PrintSourceObjects(rootResultSourceObjects);

}

Private void PrintSourceObjects(SourceObjectComposition sourceObjects)

{

foreach(SourceObject source in sourceObjects)

{

// In this approach, cross reference tries to provide the actual client openness object via the "UnderlyingObject"attribute. 

// However, due to the fact that cross reference result can have an object of any type such as OB, FB, DB, Tag etc returned from the CrossReferenceService

// and a limitation in openness that the type cannot be pre-mapped, the user must cast the object before accessing its attributes.

// As a result, the openness user must convert sourceObject.UnderlyingObject to required EOM type (such as OB, DB, FB, Tag etc)

if (source.UnderlyingObject is DataBlock)

{

var db = source.UnderlyingObject as DataBlock;//Perform actions on db.

}

else if(source.UnderlyingObject is CodeBlock)

{

var cb = source.UnderlyingObject as CodeBlock;

//Perform actions on cb.

}

// Every new type for which support is added, the openness user must add the casting logic as shown in the above if-else conditional statement.

// Currently, the EOM support is NOT available for Member objects such as Datablock member, Tag member etc.

// In such cases, the "source.UnderlyingObject" will be null.

Console.WriteLine(source.Name);

//No other attributes are available from the IEngineeringObject. All the remaining values must be given from cross reference separately via SourceObject EOM.     

Console.WriteLine(source.Address);

Console.WriteLine(source.TypeName);

Console.WriteLine(source.Device);

Console.WriteLine(source.Path);

//Get the source object references     

ReferenceObjectComposition referenceObjects = source.References;     

PrintReferences(referenceObjects);

//Get the source object's children     

SourceObjectComposition sourceObjectChildren = source.Children;     

PrintSourceObjects(sourceObjectChildren); 

}

}

private void PrintReferences(ReferenceObjectComposition referenceObjects)

{

foreach (ReferenceObject referenceObject in referenceObjects)

{

// Needs similar casting for each type as seen in source object example snippet     

if (referenceObject.UnderlyingObject is DataBlock)     

{        

var db = referenceObject.UnderlyingObject as DataBlock; 

//Perform actions on db.

} 

else if(referenceObject.UnderlyingObject is CodeBlock)

{

var cb = referenceObject.UnderlyingObject as CodeBlock;

//Perform actions on cb.

}

//No other attributes are available from the IEngineeringObject. All the remaining values must be given from cross reference separately via ReferenceObject EOM.

Console.WriteLine(referenceObject.Name);      

Console.WriteLine(referenceObject.Address);

Console.WriteLine(referenceObject.TypeName);

Console.WriteLine(referenceObject.Device);

Console.WriteLine(referenceObject.Path);

LocationComposition locations = referenceObject.Locations;

//Looping through ReferenceLocations   ​  

foreach (Location location in locations)     

​{

Console.WriteLine(location.Name);

Console.WriteLine(location.ReferenceLocation);

Console.WriteLine(location.ReferenceType);

Console.WriteLine(location.Access);

if(location.ReferencedAs is Tag)

var referencedAsObject = location.ReferencedAs as Tag;

}

// Needs similar casting for each type as seen in source object example snippet          Console.WriteLine(location.ReferncedAsName);

Console.WriteLine(location.Address);

Console.WriteLine(location.TypeName);      ​

}  

}

}