The results that contain the OPC Data Access value/timestamp/quality triple (instances of DAVtqResult) can be formatted using standard or custom format strings.

DAVtqResult inherits from OperationResult, including its formatting capabilities, and adds some new. Only the new and/or modified capabilities are described here; please referrer to OperationResult formatting description for all the inherited capabilities.

Standard and custom format strings are supported by some overloads of the ToString method. For example, you can supply a format string to the ToString(String) and ToString(String, IFormatProvider) methods. Standard and custom format strings are also supported by the .NET Framework composite formatting feature, which is used by some Write and WriteLine methods of the Console and StreamWriter classes, the String.Format method, and the StringBuilder.AppendFormat method. The composite format feature allows you to include the string representation of multiple data items in a single string, to specify field width, and to align values in a field.

Standard DAVtqResult Format Strings

The following table describes the standard format strings and displays sample output produced by each format specifier.

Format specifier	Name	Description
“f”	Full (short)	As "F" for OperationResult, with added VTQ in short format.
“F”	Full (long)	As for OperationResult, with added VTQ.
“g”	General (short)	As for OperationResult, with added VTQ when present, in short format.
“G”	General (long)	As for OperationResult, with added VTQ when present.

Custom DAVtqResult Format Strings

The following table describes the custom format specifiers and displays sample output produced by some of the format specifiers.

Format specifier	Name	Description
Format specifiers inherited from OperationResult, and:
V V(format)	Vtq	Value of the named property, optionally formatted with format.
Z Z(format)	StatusInfo	Value of the named property, optionally formatted with format.	Warning