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:

2: -

3: -

4:

5:

6:

7:

8:

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: