我正在使用asmx服务并尝试在尝试调用时执行async / await
目前我的控制器如下
Public ActionResult Index()
{
var data = _repository.GetDataFromAsmxService(somedata);
}
// RepositoryClass方法
public List<ObjectToReturn> GetDataFromAsmxService(somedata)
{
var res = _asmxService.GetReportData(somedata);
var result = process(res);
return result;
}
在进一步查看生成的refrence.cs文件后,发现了等效调用的void async和onCompleted方法 .
所以我把它改成了
private void GetReportDataCallBack(object sender, GetReportDataCompletedEventArgs e)
{
var res = e.Result;
var result = process(res);
}
public List<ObjectToReturn> GetDataFromAsmxService(somedata)
{
_asmxService.GetReportDataCompleted +=GetReportDataCallBack;
_asmxService.GetReportDataAsync(somedata);
}
但现在回调发生在Event委托上,所以我的控制器期望返回数据不会得到它 . what is a better way to call async/await from controller and get the data from asmx webservice
代码来自Refenrece.cs //生成的代码
[System.Web.Services.Protocols.SoapHeaderAttribute("ApiAuthenticationValue")]
[System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://webservice.com/GetReportData", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Bare)]
[return: System.Xml.Serialization.XmlElementAttribute(Namespace="http://webservice.com/")]
public GetReportDataResponse GetReportData([System.Xml.Serialization.XmlElementAttribute(Namespace="http://webservice.com/")] GetReportDataRequest GetReportDataRequest) {
object[] results = this.Invoke("GetReportData", new object[] {
GetReportDataRequest});
return ((GetReportDataResponse)(results[0]));
}
/// <remarks/>
public void GetReportDataAsync(GetReportDataRequest GetReportDataRequest) {
this.GetReportDataAsync(GetReportDataRequest, null);
}
/// <remarks/>
public void GetReportDataAsync(GetReportDataRequest GetReportDataRequest, object userState) {
if ((this.GetReportDataOperationCompleted == null)) {
this.GetReportDataOperationCompleted = new System.Threading.SendOrPostCallback(this.OnGetReportDataOperationCompleted);
}
this.InvokeAsync("GetReportData", new object[] {
GetReportDataRequest}, this.GetReportDataOperationCompleted, userState);
}
private void OnGetReportDataOperationCompleted(object arg) {
if ((this.GetReportDataCompleted != null)) {
System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
this.GetReportDataCompleted(this, new GetReportDataCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
}
}
1 回答
你拥有的是Event-Based Asynchronous Pattern (EAP),你想要做的是wrap that up in a task所以你可以等待它 . 你通过TaskCompletionSource这样做 .
您还需要将控制器更改为异步
Here is a good article解释了如何从同步MVC代码转换为异步MVC代码并解释了为什么即使
Index
现在被称为IndexAsync
它仍然可以作为Index的控制器 .