BLToolkit-它是否能够进行异步数据库操作

Question

我想避免由于缓慢的数据库读取而阻塞执行线程，我非常喜欢BLToolkitDataAccessor

public abstract class PersonAccessor : DataAccessor
{
    [SqlText(@"SELECT * FROM Person WHERE FirstName = @firstName")]
    public abstract List<Person> GetPersonListByFirstName(string @firstName);
    [SprocName("sp_GetPersonListByLastName")]
    public abstract List<Person> GetPersonListByLastName(string @lastName);
}

BLToolkit数据访问器是否可以使用异步操作？

希望它能返回Task<T>，我可以使用C#5.0 中的await

Br。

Answer 1

您可以组合提供Begin-End模式的Async属性，并将其转换为Task，如下所示（未测试）：

public abstract class PersonAccessor : DataAccessor
{
    [SqlText(@"SELECT * FROM Person WHERE FirstName = @firstName")]
    public abstract List<Person> GetPersonListByFirstName(string @firstName);
    [Async]
    public abstract IAsyncResult BeginGetPersonListByFirstName(string @firstName, AsyncCallback callback, object state);
    [Async]
    public abstract List<Person> EndGetPersonListByFirstName(IAsyncResult asyncResult);
    public Task<List<Person>> GetPersonListByFirstNameAsync(string @firstName)
    {
        return Task.Factory.FromAsync(
            BeginGetPersonListByFirstName(),
            EndGetPersonListByFirstName,
            @firstName, 
            null);
    }
}
public class TestClass 
{
    public List<Person> AwaitTest(PersonAccessor personAccessor, string @firstName)
    {
        return await personAccessor.GetPersonListByFirstNameAsync(@firstName);
    }
}