如何创建C#async powershell方法？

Question

所以我想创建一种异步运行PowerShell脚本的方法.下面的代码是我到目前为止,但它似乎不是异步,因为它锁定应用程序,输出不正确.

    public static string RunScript(string scriptText)
    {
        PowerShell ps = PowerShell.Create().AddScript(scriptText);

        // Create an IAsyncResult object and call the
        // BeginInvoke method to start running the 
        // pipeline asynchronously.
        IAsyncResult async = ps.BeginInvoke();

        // Using the PowerShell.EndInvoke method, get the
        // results from the IAsyncResult object.
        StringBuilder stringBuilder = new StringBuilder();
        foreach (PSObject result in ps.EndInvoke(async))
        {
            stringBuilder.AppendLine(result.Methods.ToString());
        } // End foreach.

        return stringBuilder.ToString();
    }

Answer 1

你是异步调用它.

但是,通过调用同步等待异步操作完成,您就会失败EndInvoke().

要实际异步运行它,您还需要使方法异步.
您可以通过调用Task.Factory.FromAsync(...)获取Task<PSObject>异步操作然后使用来实现await.