Question

Namespace.References是一个PCL Profile 78项目，其中包含对Web服务（asmx）的引用。由于配置文件不支持整个服务模型堆栈，因此仅以APM样式生成异步方法。

从传统的C＃控制台项目（引用为库）调用GetLoggedInUser时，服务调用成功完成。

但是，当从Xamarin.Droid / Xamarin.Forms项目中执行相同的服务调用时，服务调用成功完成，但响应不完整。响应仅填充基本响应类中的IsSuccessful值。

见下文

public partial class GetUserResponse : GatewayResponseBase {

    private User signedInUserField;

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Order=0)]
    public User SignedInUser {
        get {
            return this.signedInUserField;
        }
        set {
            this.signedInUserField = value;
            this.RaisePropertyChanged("SignedInUser");
        }
    }
} 

public abstract partial class GatewayResponseBase : object, System.ComponentModel.INotifyPropertyChanged {

    private bool isSuccessfulField;

    private string messageField;

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Order=0)]
    public bool IsSuccessful {
        get {
            return this.isSuccessfulField;
        }
        set {
            this.isSuccessfulField = value;
            this.RaisePropertyChanged("IsSuccessful");
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Order=1)]
    public string Message {
        get {
            return this.messageField;
        }
        set {
            this.messageField = value;
            this.RaisePropertyChanged("Message");
        }
    }

    public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;

    protected void RaisePropertyChanged(string propertyName) {
        System.ComponentModel.PropertyChangedEventHandler propertyChanged = this.PropertyChanged;
        if ((propertyChanged != null)) {
            propertyChanged(this, new System.ComponentModel.PropertyChangedEventArgs(propertyName));
        }
    }
}

我以下列方式调用服务

const string username = "user";
const string password = "pass";
var response = Task<GetUserResponse>.Factory.FromAsync(Service.BeginGetLoggedInUser,
                                                               Service.EndGetLoggedInUser,
                                                               username, password, null).Result;

在传统的控制台应用下，response.SignedInUser已正确填充。在移动平台response.SignedInUser下执行时调用呼叫始终为null;

服务设置如下

var service = new SoapClient();
ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
service.Endpoint.Address = new EndpointAddress("https://address/Service.asmx");
var Service = (IService) service;

以下面的方式调用服务会产生与每个平台上相关调用相同的结果（即传统的控制台应用程序与移动平台）。

service.GetServicesCompleted += (sender, args) =>
{
   var value = args.Result;
};

service.GetServicesAsync(username, password);

为什么服务调用会以完成时只填充部分信息的方式失败

由于

Xamarin.Forms下的WebService调用返回不完整的结果

0 个答案: