本文整理汇总了C#中TaskFactory.FromException方法的典型用法代码示例。如果您正苦于以下问题：C# TaskFactory.FromException方法的具体用法？C# TaskFactory.FromException怎么用？C# TaskFactory.FromException使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类TaskFactory的用法示例。
在下文中一共展示了TaskFactory.FromException方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: ExecuteScalarAsync
public virtual Task<object> ExecuteScalarAsync(CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
var taskFactory = new TaskFactory<object>();
return taskFactory.FromCancellation<object>(cancellationToken);
}
else
{
CancellationTokenRegistration registration = new CancellationTokenRegistration();
if (cancellationToken.CanBeCanceled)
{
registration = cancellationToken.Register(s => ((DbCommand)s).CancelIgnoreFailure(), this);
}
try
{
return Task.FromResult<object>(ExecuteScalar());
}
catch (Exception e)
{
var taskFactory = new TaskFactory<object>();
return taskFactory.FromException<object>(e);
}
finally
{
registration.Dispose();
}
}
}示例2: OpenAsync
public virtual Task OpenAsync(CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
var taskFactory = new TaskFactory();
return taskFactory.FromCancellation(cancellationToken);
}
else
{
try
{
Open();
var taskFactory = new TaskFactory();
return taskFactory.FromResult<bool>(false);
}
catch (Exception e)
{
var taskFactory = new TaskFactory();
return taskFactory.FromException(e);
}
}
}示例3: ExecuteDbDataReaderAsync
protected virtual Task<DbDataReader> ExecuteDbDataReaderAsync(CommandBehavior behavior, CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
var taskFactory = new TaskFactory<DbDataReader>();
return taskFactory.FromCancellation<DbDataReader>(cancellationToken);
}
else
{
CancellationTokenRegistration registration = new CancellationTokenRegistration();
if (cancellationToken.CanBeCanceled)
{
registration = cancellationToken.Register(s => ((DbCommand)s).CancelIgnoreFailure(), this);
}
try
{
return Task.FromResult<DbDataReader>(ExecuteReader(behavior));
}
catch (Exception e)
{
var taskFactory = new TaskFactory<DbDataReader>();
return taskFactory.FromException<DbDataReader>(e);
}
finally
{
registration.Dispose();
}
}
}