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AsyncAdapterExtensionMethodsFetchScalarAsyncTValue Method (IDataAccessAdapter, DynamicQuery)
Async variant of FetchScalarTValue(IDataAccessAdapter, DynamicQuery). Fetches a scalar value using the query specified, and returns this value typed as TValue, using a cast. The query specified will be converted to a scalar query prior to execution.

Namespace:  SD.LLBLGen.Pro.QuerySpec.Adapter
Assembly:  SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.1.0.0 (5.1.0)
Syntax
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public static Task<TValue> FetchScalarAsync<TValue>(
	this IDataAccessAdapter adapter,
	DynamicQuery query
)

Parameters

adapter
Type: SD.LLBLGen.Pro.ORMSupportClassesIDataAccessAdapter
The adapter.
query
Type: SD.LLBLGen.Pro.QuerySpecDynamicQuery
The query.

Type Parameters

TValue
The type of the value to return.

Return Value

Type: TaskTValue
the value to fetch

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IDataAccessAdapter. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
Remarks
Use nullable(Of T) for scalars which are a value type, to avoid crashes when the scalar query returns a NULL value.
See Also