.NET对象序列化—TimeSpan

    在WebServices中，TimeSpan不能作为系统的TimeSpan作为参数，在客户端会生成新的TimeSpan类。

一、问题重现

    创建一个以TimeSpan为参数的Web Method:

1:  [WebMethod]

2:  public string HelloWorld(TimeSpan span)

3:  {

4:      return "Hello World";

5:  }

6:   

 

     查看WSDL文件，可以看到以下的内容：

   1: <s:element name="HelloWorld">

   2: - <s:complexType>

   3: - <s:sequence>

   4:   <s:element minOccurs="1" maxOccurs="1" name="span" type="tns:TimeSpan" /> 

   5:   </s:sequence>

   6:   </s:complexType>

   7:   </s:element>

   8:   <s:complexType name="TimeSpan" /> 

 

    客户端引用Web Services会生成新的TimeSpan类:

   1: public partial class TimeSpan : object,System.Runtime.Serialization.IExtensibleDataObject,System.ComponentModel.INotifyPropertyChanged {

   2:     

   3:     [System.NonSerializedAttribute()]

   4:     private System.Runtime.Serialization.ExtensionDataObject extensiondatafield;

   5:     

   6:     [global::System.ComponentModel.browsableAttribute(false)]

   7:     public System.Runtime.Serialization.ExtensionDataObject ExtensionData {

   8:         get {

   9:             return this.extensiondatafield;

  10:         }

  11:         set {

  12:             this.extensiondatafield = value;

  13:         }

  14:     }

  15:     

  16:     public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;

  17:     

  18:     protected void RaisePropertyChanged(string propertyName) {

  19:         System.ComponentModel.PropertyChangedEventHandler propertyChanged = this.PropertyChanged;

  20:         if ((propertyChanged != null)) {

  21:             propertyChanged(this,new System.ComponentModel.PropertyChangedEventArgs(propertyName));

  22:         }

  23:     }

  24: }

      方法只能使用上面生成的TimeSpan:

  二、解决方法

      扩展TimeSpan:

   1: public class TimeSpanEx

   2: {

   3:     [XmlElement(ElementName = "TimeSpan")]

   4:     public string TimeSpanAsstring

   5:     {

   6:         get { return TimeSpan != null ? TimeSpan.ToString() : null; }

   7:         set

   8:         {

   9:             TimeSpan span;

  10:             if (value != null && TimeSpan.TryParse(value,out span))

  11:                 TimeSpan = span;

  12:             else

  13:                 TimeSpan = new TimeSpan();

  14:         }

  15:     }

  16:     [XmlIgnore]

  17:     public TimeSpan TimeSpan { get; set; }

  18: }

      通过TimeSpan传递TimeSpan：

1:  [WebMethod]

2:  public string HelloWorld(TimeSpanEx span)

3:  {

4:      return "Hello World";

5:  }

6:   

 

      客户端使用示例：

1:  WebService1SoapClient client = new WebService1SoapClient();

2:  TimeSpanEx span = new TimeSpanEx();

3:  span.TimeSpan = new TimeSpan(1,2,3).ToString();

4:  client.HelloWorld(span);

5:   

 

       服务端获取的TimeSpan结果: