promise from c# winmd cancel problem

Question

public static IAsyncOperation<string> getData(string url, string param)
{
            return (IAsyncOperation<string>)AsyncInfo.Run((System.Threading.CancellationToken ct) => request(url, param));
}

 private static async Task<string> request(string url, string param)
 {
            HttpClient client = new HttpClient();
            HttpContent httpContent = new StringContent(param);
            httpContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/x-www-form-urlencoded");
            var response = await client.PostAsync(url, httpContent);
            return response.content;
 }

var promise;
..
function reqData(){
if(promise)
promise.cancel();
..
promise = XXX.getData("http://www.eeeeee.com/nimabi.htm","a=1").then(onComplete,onerror,onprogress);

..


}
function onComplete(){
//something that i don't want to run  repeatly 
};

There is a page to search items,when I search it in different conditions, it will call reqData() again.

and render the result on the page.

so,my problem is : when i reqData too fast,i need to cancel the before oncomplete.but it seems do not work..

How to solve it? thx.

Answer 1

I don't understand - maybe I'm missing something since I don't do as much javascript - why would the onComplete run repeatedly?  Please explain what's going on here.

---

Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.

NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined objects and unknown namespaces.

Answer 2

Sorry for explaining it not clearly

There is a page to search items,when I search it in different conditions, it will call again reqData() again.

and render the result on the page.

so,my problem is : when i reqData too fast,i need to cancel the before oncomplete.but it seems do not work..

Answer 3

problem solved.

in getData()  

ct.Register(() => ct.ThrowIfCancellationRequested());