Как использовать signalr, чтобы вызвать функцию со стороны сервера, чтобы отменить ход загрузки? ⇐ C#

[Гость]

Настройка внутреннего контроллера Signalr:

Код: Выделить всё

namespace Antz.App.SignalR.Hubs
{
public class ProgressHub : Hub
{
public static bool IsCancelled = false;

public void SendProgress(string progressMessage, int progressCount, int totalItems)
{
//Thread.Sleep(1);
var hubContext = GlobalHost.ConnectionManager.GetHubContext
();
var percentage = (progressCount * 100) / totalItems;
hubContext.Clients.All.AddProgress(progressMessage, percentage + "%");
}

public void IsCancelledUpload()
{
IsCancelled = true;
}
}
}

Javascript:

Код: Выделить всё

signalrConnection = $.hubConnection("/SignalR", { useDefaultPath: false });
signalrProxy = signalrConnection.createHubProxy('ProgressHub');

signalrProxy.on('AddProgress', function (message, percentage) {

UpdateProgressBar(percentage);

});

/* signalrConnection.logging = true;*/

signalrConnection.start({ transport: 'longPolling' }).then(function () {

console.log("Connection Started");

});

signalrConnection.disconnected(function () {
console.log('Disconnected');

setTimeout(function () {
signalrConnection.start({ transport: 'longPolling' }).then(function () {
console.log("Connection Started");
});
}, 3000);
});

signalrConnection.error(function (error) {
console.log(error);
});

function UpdateProgressBar(percentage) {

const progressBar = document.querySelector(".progress-bar");
progressBar.style.opacity = "1";
progressBar.style.width = percentage;
progressBar.innerHTML = percentage;

if (percentage === "100%") {

progressBar.style.width = "";
progressBar.innerHTML = "";

}
}

Загрузить внутренний контроллер функции:

Код: Выделить всё

ProgressHub progressHub = new ProgressHub();

var refNoList = new List();
await Task.Run(async () =>
{
foreach (ArrayList row in data3)
{
recordProcessed++;

rowIndex++;
// skip row 1 as it's a header
if (rowIndex == 1)
{
continue;
}

progressHub.SendProgress("Process in progress...", rowIndex, totalRows);
//await Task.Delay(5000); // Introduce a small delay

bool all_pass = true;

string docType = row[0].ToString().Trim();
string refNo = row[1].ToString().Trim();
string vendor = row[2].ToString().Trim();
string remark = row[3].ToString().Trim();

I've tried to put a static field on the class ProgressHub and if the user was clicked the cancel button, the button will trigger the signalr to invoke the function IsCancelledUpload which is use to update the IsCancelled boolean to true. So Excel upload function will check if the boolean is true, the loop will be break. But using static is not a wise choice, so I'm seeking another approach for this.


Источник: https://stackoverflow.com/questions/781 ... load-progr