小编Con*_*Guy的帖子

我想在我的类方法中使用Promises.在Promise反模式中,我读到为每个新函数创建一个新的承诺被认为是坏的.

但是,我不想在我的项目中返回不相关的promise,所以我想做这样的事情:

class MyClass {

  async getToken() {
    return new Promise(
      (resolve, reject) => {
        // . . .
        const token_str = '<response_from_http_request>';
        resolve(token_str);
      }
    )
  }

  async doSomething(token) {
    return new Promise(
      (resolve, reject) => {
        const result = // . . .
        resolve(result);
      }
    )
  }

  async doAnotherSomething(token) {
    return new Promise(
      (resolve, reject) => {
        const result = // . . .
        resolve(result);
      }
    )
  }

}

然后我会像这样使用它:

let instance = new MyClass();

(async () …

我有以下一段代码：

private void btnAction_Click(object sender, RoutedEventArgs e)
{

    /** Clear the results field */
    txtResult.Text = "";

    /** Disable the button and show waiting status */
    btnAction.IsEnabled = false;
    lblStatus.Text = "Wait...";

    /** Get input from the query field */
    string input = query.Text;

    /** Run a new task */
    Task.Run(() => {

        // calling a method that takes a long time (>3s) to finish and return
        var attempt = someLibrary.doSomethingWith(input);

        // return the result to the GUI thred
        this.Dispatcher.Invoke(() …