与AsyncEnumerator工作 [英] Working with AsyncEnumerator

问题描述

我已经与AsyncEnumerator类的工作，帮助清理我的异步code。问题是code收益回报永远不会触发后。用户界面调用一个按钮被点击时，它调用HttpWorker对象的对象。无论按键多少点击code永远不会过去的收益回报。

 公共无效ReadFromUrl（字符串URL）
    {
        AsyncEnumerator asyncEnum =新AsyncEnumerator（）;
        asyncEnum.BeginExecute（的GetData（asyncEnum，URL），asyncEnum.EndExecute）;
    }    私人的IEnumerator＆LT;＆的Int32 GT;的GetData（AsyncEnumerator AsyncEnum，字符串URL）
    {
        URL =网址;
        请求=（HttpWebRequest的）WebRequest.Create（URL）;        request.CookieContainer =新的CookieContainer（）;
        request.AllowAutoRedirect = TRUE;
        request.UserAgent =Mozilla的/ 5.0（视窗; U; Windows NT的5.1; EN-US; rv中：1.8.0.6）的Gecko / 20060728火狐/ 1.5.0.6        request.BeginGetResponse（AsyncEnum.End（），NULL）;
        AsyncEnum.SyncContext = NULL;
        产量返回1;        响应=（HttpWebResponse）request.EndGetResponse（AsyncEnum.DequeueAsyncResult（））;
        如果（response.Status code ==的HTTPStatus code.OK）
        {
            //创建流，连接coder和读卡器。
            流responseStream = response.GetResponseStream（）;
            编码streamEn codeR = Encoding.UTF8;
            StreamReader的responseReader =新的StreamReader（responseStream，streamEn codeR）;
            responseAsString = responseReader.ReadToEnd（）;
        }
        其他
        {
            抛出新的异常（的String.Format（回应无效{0}，response.Status code））;
        }    }
 

解决方案

有没有错，除了我调试使用！

I have been working with the AsyncEnumerator class to help clean up my async code. The problem is the code after the yield return never fires. The UI calls an object which calls the HttpWorker object when a button is clicked. No matter how much the button is clicked the code never goes past the yield return.

    public void ReadFromUrl(string Url)
    {
        AsyncEnumerator asyncEnum = new AsyncEnumerator();
        asyncEnum.BeginExecute(GetData(asyncEnum,Url), asyncEnum.EndExecute);
    }

    private IEnumerator<Int32> GetData(AsyncEnumerator AsyncEnum, String Url)
    {
        url = Url;
        request = (HttpWebRequest)WebRequest.Create(url);

        request.CookieContainer = new CookieContainer();
        request.AllowAutoRedirect = true;
        request.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5.0.6";

        request.BeginGetResponse(AsyncEnum.End(), null);
        AsyncEnum.SyncContext = null;
        yield return 1;

        response = (HttpWebResponse)request.EndGetResponse(AsyncEnum.DequeueAsyncResult());


        if (response.StatusCode == HttpStatusCode.OK)
        {
            // Create the stream, encoder and reader.
            Stream responseStream = response.GetResponseStream();
            Encoding streamEncoder = Encoding.UTF8;
            StreamReader responseReader = new StreamReader(responseStream, streamEncoder);
            responseAsString = responseReader.ReadToEnd();
        }
        else
        {
            throw new Exception(String.Format("Response Not Valid {0}", response.StatusCode));
        }

    }

解决方案

There was nothing wrong except my debug use!

这篇关于与AsyncEnumerator工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！