[英]Microsoft Project Online OData asynchronous query
I am trying to use Microsoft Project OData by querying data in C#. 我正在尝试通过C#查询数据来使用Microsoft Project OData 。 I am having performances issues with delays around 1s for each query.
我遇到性能问题,每个查询的延迟时间约为1秒。 I am trying to query 2 information at once using that method :
我试图使用该方法一次查询2条信息:
public static async Task<string> ReadXml(string url)
{
var request = (HttpWebRequest)WebRequest.Create(url);
request.Credentials = Credentials; // SharePointOnlineCredentials
request.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f");
using (var response = (HttpWebResponse)await request.GetResponseAsync())
using (var stream = response.GetResponseStream())
using (var reader = new System.IO.StreamReader(stream))
{
var xml = await reader.ReadToEndAsync();
return xml;
}
}
It works fine if I call it and always wait for it to end before calling it again, but I never receive any response from the WebRequest if I call it multiple times at once : 如果我调用它并总是等待它结束再再次调用它,它会很好地工作,但是如果我一次调用它多次,我将永远不会收到来自WebRequest的任何响应:
// just an example. I usually put a condition to filter for the tasks of a single project
var query1 = ReadXml(@"https://something.sharepoint.com/sites/pwa/_api/ProjectData/Projects");
var query2 = ReadXml(@"https://something.sharepoint.com/sites/pwa/_api/ProjectData/Tasks");
Task.WaitAll(query1, query2);
If I "await" the first one and then do the second one it works fine, but not with the code above. 如果我“等待”第一个,然后再做第二个,则可以正常工作,但不能使用上面的代码。 And this is assuming there is < 300 tasks in the project, if more than that I have to query them in chunk of 300 leading to 4 or 5 seconds for the entire query since I can't to them all at once!
并假设项目中有<300个任务,如果超出这个数量,我必须以300个块的形式查询它们,导致整个查询花费4或5秒钟,因为我无法一次完成所有任务! Is there a way to send multiple request at the same time ?
有没有办法同时发送多个请求? I am able to do it by simply entering the url in multiple chrome tabs really fast / have faster responses.
我可以通过简单地在多个chrome标签中输入url来做到这一点,而且响应速度更快。 I don't understand why it doesn't work with my code!
我不明白为什么它不适用于我的代码!
Thanks, 谢谢,
According to the following post Webrequest.Create could be the problem, it uses an internally blocking method C# Thread UI is getting blocked | 根据下面的Webrequest.Create帖子,可能是问题所在,它使用了内部阻止方法C#Thread UI被阻止| Possible reason WebRequest.Create?
WebRequest.Create的可能原因? .
。
The code below uses the newer HttpClient and shouldn't have this issue. 下面的代码使用较新的HttpClient,不应出现此问题。
public static HttpClient _HttpClient { get; } = new HttpClient(new HttpClientHandler { Credentials=new NetworkCredential("","")});
public static async Task<string> ReadXml(string url)
{
using (var requestMessage = new HttpRequestMessage(HttpMethod.Get, url))
{
requestMessage.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f");
using (var response = await _HttpClient.SendAsync(requestMessage))
{
return await response.Content.ReadAsStringAsync();
}
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.