Question

我在服务器上有一个班级

   [MessageContract]
public class RemoteFileInfo : IDisposable, INotifyPropertyChanged
{
    [MessageHeader(MustUnderstand = true)]
    public string _FileName;

    [MessageHeader(MustUnderstand = true)]
    public string FileName
    {
        get { return _FileName; }
        set { _FileName = value; }
    }


    [MessageBodyMember(Order = 1)]
    public System.IO.Stream _FileByteStream;

    [MessageHeader(MustUnderstand = true)]
    public System.IO.Stream FileByteStream
    {
        get { return _FileByteStream; }
        set { _FileByteStream = value; }
    }

    public void Dispose()
    {
        // close stream when the contract instance is disposed. 
        // this ensures that stream is closed when file download 
        // is complete, since download procedure is handled by the client 
        // and the stream must be closed on server.
        if (_FileByteStream!=null)
        {
            _FileByteStream.Close();
            _FileByteStream = null;
        }
    }

    #region INotifyPropertyChanged Members

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void SendPropertyChanged(String propertyName)
    {
        if ((this.PropertyChanged != null))
        {
            this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }

    #endregion
}

我通过WCF与我的服务器通信。这个类应该是[MessageContract]，因为流式传输 - （我的所有其他类都使用[DataContract]）。

我的问题是，在客户端使用SvcUtil生成类后，我丢失了INotify ...界面...我明白了：

    [System.Diagnostics.DebuggerStepThroughAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
[System.ServiceModel.MessageContractAttribute(WrapperName="RemoteFileInfo", WrapperNamespace="http://tempuri.org/", IsWrapped=true)]
public partial class RemoteFileInfo
{
    [System.ServiceModel.MessageHeaderAttribute(Namespace="http://tempuri.org/")]
    public System.IO.Stream FileByteStream;

    [System.ServiceModel.MessageHeaderAttribute(Namespace="http://tempuri.org/")]
    public string FileName;

    [System.ServiceModel.MessageHeaderAttribute(Namespace="http://tempuri.org/")]
    public string _FileName;

    [System.ServiceModel.MessageBodyMemberAttribute(Namespace="http://tempuri.org/", Order=0)]
    public System.IO.Stream _FileByteStream;

    public RemoteFileInfo()
    {
    }

    public RemoteFileInfo(
                System.IO.Stream FileByteStream, 
                string FileName, 
                string _FileName, 
                System.IO.Stream _FileByteStream)
    {
        this.FileByteStream = FileByteStream;
        this.FileName = FileName;
        this._FileName = _FileName;
        this._FileByteStream = _FileByteStream;
    }
}

没有INotifyPropertyChanged数据绑定不起作用我知道但是我可以在客户端添加它，就像我这样做：

    public partial class RemoteFileInfo : System.ComponentModel.INotifyPropertyChanged
{
    #region INotifyPropertyChanged Members

    public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;

    #endregion
}

但数据绑定仍然不起作用。你有什么主意吗？我根本不能使用[MessageContract]类的数据绑定???

提前感谢您的回答！

Answer 1

消息合约仅指定消息的结构。服务器端的任何接口都不会出现在客户端，因为它们与消息的结构无关。

此外，如果您的客户端是用Java编写的，它对这些接口有什么作用？

WCF [MessageContract]类的WPF数据绑定问题

1 个答案: