public override async Task <IDataReaderAsync> ExecuteReaderAsync(CancellationToken cancellationToken)
{
if (_dataContext._batchCounter > 0)
{
throw new LinqException("Incompatible batch operation.");
}
string data;
SetCommand(true);
var queryContext = Query.Queries[QueryNumber];
var q = _dataContext.GetSqlOptimizer().PrepareStatementForRemoting(queryContext.Statement, _dataContext.MappingSchema, _evaluationContext);
var currentParameters = q.CollectParameters();
data = LinqServiceSerializer.Serialize(
_dataContext.SerializationMappingSchema,
q,
currentParameters,
_evaluationContext.ParameterValues,
QueryHints);
_client = _dataContext.GetClient();
var ret = await _client.ExecuteReaderAsync(_dataContext.Configuration, data).ConfigureAwait(Common.Configuration.ContinueOnCapturedContext);
var result = LinqServiceSerializer.DeserializeResult(_dataContext.SerializationMappingSchema, ret);
var reader = new ServiceModelDataReader(_dataContext.SerializationMappingSchema, result);
return(new DataReaderAsync(reader));
}
public override async Task <IDataReaderAsync> ExecuteReaderAsync(CancellationToken cancellationToken)
{
if (_dataContext._batchCounter > 0)
{
throw new LinqException("Incompatible batch operation.");
}
SetCommand(true);
var queryContext = Query.Queries[QueryNumber];
_client = _dataContext.GetClient();
var q = _dataContext.GetSqlOptimizer().OptimizeStatement(queryContext.Statement, _dataContext.MappingSchema);
var ret = await _client.ExecuteReaderAsync(
_dataContext.Configuration,
LinqServiceSerializer.Serialize(
q,
q.IsParameterDependent ? q.Parameters.ToArray() : queryContext.GetParameters(),
QueryHints));
var result = LinqServiceSerializer.DeserializeResult(ret);
var reader = new ServiceModelDataReader(_dataContext.MappingSchema, result);
return(new DataReaderAsync(reader));
}
public async Task QueryForEachAsync <T>(Func <IDataReader, T> objectReader, Func <T, bool> action, CancellationToken cancellationToken)
{
_dataContext.ThrowOnDisposed();
await TaskEx.Run(() =>
{
var result = LinqServiceSerializer.DeserializeResult(_result);
using (var reader = new ServiceModelDataReader(_dataContext.MappingSchema, result))
{
var skip = _skipAction?.Invoke() ?? 0;
while (skip-- > 0 && reader.Read())
{
if (cancellationToken.IsCancellationRequested)
{
return;
}
}
var take = _takeAction?.Invoke() ?? int.MaxValue;
while (take-- > 0 && reader.Read())
{
if (cancellationToken.IsCancellationRequested)
{
return;
}
else
if (!action(objectReader(reader)))
{
return;
}
}
}
},
cancellationToken);
}
public DataReaderAsync(ServiceModelDataReader dataReader)
{
DataReader = dataReader;
}