/// <summary>
/// Extension method to process the result of an asynchronous scalar query operation.
/// </summary>
/// <typeparam name="T"> The type of entity queried. </typeparam>
/// <param name="source"> The EntityScalarQueryOperation returned from an asynchronous query. </param>
/// <param name="onSuccess"> A callback to be called if the asynchronous query was successful. </param>
/// <param name="onFail"> A callback to be called if the asynchronous query failed. </param>
/// <returns> Returns the EntityScalarQueryOperation passed to the method's source parameter. </returns>
/// <example>
/// <code title="Example" description="" lang="CS">public OperationResult GetCustomerCount(Action<int> onSuccess = null,
/// Action<Exception> onFail = null)
/// {
/// var op = Manager.Customers.AsScalarAsync().Count();
/// return op.OnComplete(onSuccess, onFail).AsOperationResult();
/// }</code>
/// </example>
public static EntityScalarQueryOperation <T> OnComplete <T>(this EntityScalarQueryOperation <T> source,
Action <T> onSuccess, Action <Exception> onFail)
{
source.Completed += (s, args) =>
{
if (args.CompletedSuccessfully)
{
if (onSuccess != null)
{
onSuccess(args.Result);
}
}
if (args.HasError && !args.IsErrorHandled && onFail != null)
{
args.MarkErrorAsHandled();
onFail(args.Error);
}
};
return(source);
}
/// <summary>
/// Gets an awaiter used to await this operation.
/// </summary>
/// <param name="operation"> The operation to await. </param>
public static TaskAwaiter <object> GetAwaiter(this EntityScalarQueryOperation operation)
{
return(operation.AsOperationResult().GetAwaiter());
}
/// <summary>
/// Returns an implementation of <see cref="OperationResult{T}" /> that wraps a DevForce asynchronous function and provides access to the operation's result value.
/// </summary>
/// <param name="asyncOp"> DevForce asynchronous operation. </param>
/// <returns> OperationResult encapsulating the provided DevForce asynchronous operation. </returns>
public static OperationResult <T> AsOperationResult <T>(this EntityScalarQueryOperation <T> asyncOp)
{
return(new EntityScalarQueryOperationResult <T>(asyncOp));
}
/// <summary>
/// Returns an implementation of <see cref="OperationResult{T}" /> that wraps a DevForce asynchronous function and provides access to the operation's result value.
/// </summary>
/// <param name="asyncOp"> DevForce asynchronous operation. </param>
/// <returns> OperationResult encapsulating the provided DevForce asynchronous operation. </returns>
public static OperationResult <object> AsOperationResult(this EntityScalarQueryOperation asyncOp)
{
return(new EntityScalarQueryOperationResult <object>(asyncOp));
}
public EntityScalarQueryOperationResult(EntityScalarQueryOperation entityScalarQueryOperation)
: base(entityScalarQueryOperation)
{
_entityScalarQueryOperation = entityScalarQueryOperation;
}
public EntityScalarQueryOperationResult(EntityScalarQueryOperation <T> entityScalarQueryOperationT)
: base(entityScalarQueryOperationT)
{
_entityScalarQueryOperationT = entityScalarQueryOperationT;
}
