[英]How to use HttpClient async methods with WebForm's RegisterAsyncTask in ASP.NET 4.0?
I am using HttpClient in ASP.NET framework 4.0. 我在ASP.NET Framework 4.0中使用HttpClient。 All example are I have seen using OnBeginXX/OnEndXXX or async/await(4.5) with RegisterAsyncTask. 我见过所有示例,将OnBeginXX / OnEndXXX或async / await(4.5)与RegisterAsyncTask一起使用。 I need to ask how to make RegisterAsyncTask work with HtpClient's GetByteArrayAsync(or similar). 我需要问如何使RegisterAsyncTask与HtpClient的GetByteArrayAsync(或类似)一起使用。 Note this is ASP.NET 4.0? 注意这是ASP.NET 4.0吗?
Update: Just found that in 4.5 you have more overloads than 2.0 , 更新:刚发现4.5中的重载比2.0多 ,
Public method PageAsyncTask(Func<Task>) Initializes a new instance of the PageAsyncTask class using an event handler that enables the task to be handled.
Public method PageAsyncTask(Func<CancellationToken, Task>) Initializes a new instance of the PageAsyncTask class using an event handler that enables the task to be canceled.
Public method PageAsyncTask(BeginEventHandler, EndEventHandler, EndEventHandler, Object) Initializes a new instance of the PageAsyncTask class using the default value for executing in parallel.
Public method PageAsyncTask(BeginEventHandler, EndEventHandler, EndEventHandler, Object, Boolean) Initializes a new instance of the PageAsyncTask class using the specified value for executing in parallel.
Any other solution? 还有其他解决方案吗?
Update 2: I think TPL is not supported in 4.0 with recommended RegisterAsyncTask. 更新2:我认为建议的RegisterAsyncTask在4.0中不支持TPL。 Need to use HttpWebRequest with RegisterAssyncTask 需要将HttpWebRequest与RegisterAssyncTask一起使用
You cannot use async
/ await
on ASP.NET 4.0. 您不能在ASP.NET 4.0上使用async
/ await
。 This probably means you cannot use HttpClient
either. 这可能意味着您也不能使用HttpClient
。
So, I recommend using WebClient
or HttpWebRequest
. 因此,我建议使用WebClient
或HttpWebRequest
。 These support older asynchronous patterns that ASP.NET 4.0 understands. 这些支持ASP.NET 4.0可以理解的较旧的异步模式。
var client = new HttpClient();
client.GetByteArrayAsync("url").ContinueWith(t => {
//insert your code here
});
it is work in .net 4.0 它在.net 4.0中工作
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