OPC Studio User's Guide and Reference
Exception Property (_UANodeElementCollectionResult)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.OperationModel.ComTypes Namespace > _UANodeElementCollectionResult Interface : Exception Property
Gets or sets the information about the reason of the failure of the operation.
Syntax
'Declaration
 
<CanBeNullAttribute()>
Property Exception As Exception
'Usage
 
Dim instance As _UANodeElementCollectionResult
Dim value As Exception
 
instance.Exception = value
 
value = instance.Exception
[CanBeNull()]
Exception Exception {get; set;}
[CanBeNull()]
property Exception^ Exception {
   Exception^ get();
   void set (    Exception^ value);
}

Property Value

Null reference if the operation has succeeded, or a non-null System.Exception if the operation has failed.

This value of this property can be null (Nothing in Visual Basic).

The default value of this property is null.

Remarks

If you only need to test that the operation has succeeded, you can also use the OpcLabs.BaseLib.OperationModel.OperationResult.Succeeded property.

This property is not serialized into XML. Instead, OpcLabs.BaseLib.OperationModel.OperationResult.ErrorMessage is serialized. Deserializing from XML creates a base OpcLabs.BaseLib.OperationModel.OperationResult.Exception object with just the message.

The getter method of this property is pure, i.e. it does not have observable side effects.

This member or type is for use from COM. It is not meant to be used from .NET or Python. Refer to the corresponding .NET member or type instead, if you are developing in .NET or Python.

This method or property does not throw any exceptions, aside from execution exceptions such as System.Threading.ThreadAbortException or System.OutOfMemoryException.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also