c# - Blocking web page in ASP.NET Web Forms with long running method -

i want show database result in gridview web page extremly slow when calling long running method.

inside gridview have template field following item template:

<itemtemplate>           <asp:label id="lblnumresults" runat="server" text='<%# getnumcrawlresults(convert.toint32(eval("id"))) %>'></asp:label> </itemtemplate> 

this corresponding method:

public string getnumcrawlresults(int jobid) {     var task = task.run(() => utilities.getnumcrawlresults(jobid));     //this slow , blocks gui     return convert.tostring(task.result); } 

this database query:

public static async task<int> getnumcrawlresults(int jobid) {     documentcollection collection = await getorcreatecollectionasync(database.selflink, convert.tostring(jobid));      var result = (from c in documentdb.createdocumentquery<shared.crawlresult>(collection.selflink)                   select c).asenumerable();     return result.count(); } 

is there way assign label text when async method has finished?

thanks

is page rendering result? have impression task.wait() statement missing.

anyway, in case use ajax , knockout (or similar).