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: