OPC Studio User's Guide and Reference
DAReadParameters Class Members
Fields  Properties  Methods  Events


OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess Namespace : DAReadParameters Class

The following tables list the members exposed by DAReadParameters.

Public Constructors
 NameDescription
Public ConstructorOverloaded. Initializes a new instance of the DAReadParameters class.  
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Public Fields
 NameDescription
Public FieldThe default data source. Equals to DADataSource.ByValueAge.  
Public FieldThe default value age (in milliseconds). Equals to 1000, i.e. 1 second.  
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Public Properties
 NameDescription
Public Propertystatic (Shared in Visual Basic)Read parameters that specify the cache data source.  
Public PropertySelects the data source for OPC reads (from device, from OPC cache, or dynamically determined).  
Public Propertystatic (Shared in Visual Basic)Default read parameters.  
Public Propertystatic (Shared in Visual Basic)Read parameters that specify the device data source.  
Public PropertyA symbolic name of the current parameter combination if it has a standard name. Empty otherwise. (Inherited from OpcLabs.BaseLib.Parameters)
Public PropertyDetermines the age of value you would like to obtain (in milliseconds).  
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Public Methods
 NameDescription
Public MethodOverridden.   
Public MethodOverloaded. Determines whether the specified DAReadParameters is equal to the current object.  
Public Methodstatic (Shared in Visual Basic)Converts a DADataSource to a DAReadParameters object.  
Public Methodstatic (Shared in Visual Basic)Converts a value age (integer, in milliseconds) to a DAReadParameters object.  
Public MethodOverridden. Serves as the default hash function. Serves as a hash function for a particular type. Serves as a hash function for a particular type.  
Public MethodOverridden.   
Public Method (Inherited from OpcLabs.BaseLib.Info)
Public MethodGets the System.Type of the current instance. (Inherited from object)
Public Method (Inherited from OpcLabs.BaseLib.Info)
Public MethodOverridden. Returns a string that represents the current object.Returns a string that represents the current object.Returns a string that represents the current object.Returns a string that represents the current object.  
Public Method (Inherited from OpcLabs.BaseLib.Info)
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Protected Methods
 NameDescription
Protected MethodInfrastructure. Copies data from the specified parameter object into the current parameter object. (Inherited from OpcLabs.BaseLib.Parameters)
Protected MethodAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from object)
Protected MethodIndicates the standard name for the default combination of parameters. (Inherited from OpcLabs.BaseLib.Parameters)
Protected MethodReturns a collection of standard values for the OpcLabs.BaseLib.Parameters.StandardName property. (Inherited from OpcLabs.BaseLib.Parameters)
Protected MethodInfrastructure. (Inherited from OpcLabs.BaseLib.Parameters)
Protected MethodCreates a shallow copy of the current System.Object. (Inherited from object)
Protected MethodInfrastructure.  
Protected MethodOverridden. Infrastructure. Infrastructure.  
Protected MethodOverridden. Infrastructure. Infrastructure.  
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Public Events
 NameDescription
Public EventHandler for System.ComponentModel.INotifyPropertyChanged.PropertyChanged.  
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Public Operators
Determines whether the two objects are equal.
Overloaded. Converts a DADataSource to a DAReadParameters object.
Determines whether the two objects are not equal.
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See Also

Reference

DAReadParameters Class
OpcLabs.EasyOpc.DataAccess Namespace
DADataSource Enumeration
DAReadItemArguments Class
ReadParameters Property