// x:\jsc.svn\core\scriptcorelib.extensions\scriptcorelib.extensions\query\experimental\queryexpressionbuilder.sum.cs
public static Task <long> SumAsync(this IQueryStrategy <long> source)
{
Console.WriteLine("enter SumAsync");
// tested by
// X:\jsc.svn\examples\javascript\LINQ\test\auto\TestSelect\TestWebSumLong\Application.cs
var z = new TaskCompletionSource <long>();
//QueryExpressionBuilder.WithConnectionAsync(
QueryExpressionBuilder.WithConnection(
async cc =>
{
Console.WriteLine("enter WithConnection SumAsync");
var xDbCommand = QueryExpressionBuilder.GetScalarCommand(
source,
cc: cc,
Operand: QueryExpressionBuilder.xReferencesOfLong.SumOfLongReference.Method
);
Console.WriteLine("enter WithConnection SumAsync before ExecuteScalarAsync");
// will WithConnection actually wait or terminate?
// never returns?
var __value = await xDbCommand.ExecuteScalarAsync();
Console.WriteLine("enter WithConnection SumAsync after ExecuteScalarAsync " + new { __value });
z.SetResult(
(long)__value
);
}
);
return(z.Task);
}
// X:\jsc.svn\core\ScriptCoreLib.Async\ScriptCoreLib.Async\Query\Experimental\QueryExpressionBuilderAsync.SumAsync.cs
public static long Sum(this IQueryStrategy <long> source)
{
var value = default(long);
// tested by
// X:\jsc.svn\examples\javascript\LINQ\test\auto\TestSelect\TestSQLiteCLRSumLong\Program.cs
QueryExpressionBuilder.WithConnection(
cc =>
{
var xDbCommand = QueryExpressionBuilder.GetScalarCommand(
source,
cc: cc,
Operand: QueryExpressionBuilder.xReferencesOfLong.SumOfLongReference.Method
);
var __value = xDbCommand.ExecuteScalar();
value = (long)__value;
}
);
return(value);
}
