Visual Studio WSDL创建异步/等待SOAP Web服务

我的C#winforms应用程序中有一个SOAP webservice,但我正在尝试使用基于任务的async/await方法生成WSDL.exe。

我已经看过文件了 here 并尝试将以下XML文件添加到 par 但是它仍然没有为我提供基于任务的异步调用webservice方法的方法。

// BEGIN WSDLPARAMETERS.XML

<wsdlParameters  xmlns="http://microsoft.com/webReference/">
  <webReferenceOptions>
    <verbose>false</verbose>
    <codeGenerationOptions>properties newAsync enableDataBinding</codeGenerationOptions>
  </webReferenceOptions>
</wsdlParameters>

// END WSDLPARAMETERS.XML

C:\Program Files (x86)\Microsoft Visual Studio\2017\Community>wsdl.exe  "http://********/interchangeservices.asmx" /out:"****\WebServices.cs" /l:CS  /n:"AdelaideInterchangeAutomation" /par:"*****\wsdlparameters.xml"

返回如下方法

    /// <remarks/>

    public AwaitingUpload CheckHistoryNotUploaded() {
        object[] results = this.Invoke("CheckHistoryNotUploaded", new object[0]);
        return ((AwaitingUpload)(results[0]));
    }

    /// <remarks/>
    public void CheckHistoryNotUploadedAsync() {
        this.CheckHistoryNotUploadedAsync(null);
    }

    /// <remarks/>
    public void CheckHistoryNotUploadedAsync(object userState) {
        if ((this.CheckHistoryNotUploadedOperationCompleted == null)) {
            this.CheckHistoryNotUploadedOperationCompleted = new System.Threading.SendOrPostCallback(this.OnCheckHistoryNotUploadedOperationCompleted);
        }
        this.InvokeAsync("CheckHistoryNotUploaded", new object[0], this.CheckHistoryNotUploadedOperationCompleted, userState);
    }

    private void OnCheckHistoryNotUploadedOperationCompleted(object arg) {
        if ((this.CheckHistoryNotUploadedCompleted != null)) {
            System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
            this.CheckHistoryNotUploadedCompleted(this, new CheckHistoryNotUploadedCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
        }
    }

await 关键字。

    public AwaitingUpload CheckHistoryNotUploaded() {
        object[] results = this.Invoke("CheckHistoryNotUploaded", new object[0]);
        return ((AwaitingUpload)(results[0]));
    }

    /// <remarks/>
    public async Task<AwaitingUpload> CheckHistoryNotUploadedAsync() {
        await .....
    }