http://msdn.microsoft.com/zh-cn/vbasic/bb960413.aspx
Visual Basic MVP, ObjectSharp Consulting
Private _id As Integer
Private _name As String
Private _birthDate As DateTime
Public Sub New(ByVal id As Integer, _
ByVal name As String, ByVal birthDate As DateTime)
_id = id
_name = name
_birthDate = birthDate
End Sub
Public Property Id() As Integer
Get
Return _id
End Get
Set(ByVal value As Integer)
_id = value
End Set
End Property
Public Property Name() As String
Get
Return _name
End Get
Set(ByVal value As String)
_name = value
End Set
End Property
Public Property BirthDate() As DateTime
Get
Return _birthDate
End Get
Set(ByVal value As DateTime)
_birthDate = value
End Set
End Property
Public Overrides Function ToString() As String
Return String.Format( _
"{0} [Id:{1}; Birth Date: {2}]", _
_name, _id, _birthDate)
End Function
End Class
Services
<ServiceContract()> _
Public Interface IPersonService
<OperationContract()> Function GetPerson(ByVal id As Integer) As Person
<OperationContract()> Function GetPeople() As Person()
<OperationContract()> Sub UpdatePerson(ByVal p As Person)
End Interface
<ServiceBehavior(InstanceContextMode:=InstanceContextMode.Single)> _
Public Class PersonService
Implements IPersonService
Private _people As New Dictionary(Of Integer, Person)
Public Sub New()
_people.Add(1, New Person(1, "Frodo Baggins", #1/1/1380#))
_people.Add(2, New Person(2, "Sam Gamgee", #2/2/1385#))
_people.Add(3, New Person(3, "Merry Brandybuck", #3/3/1390#))
_people.Add(4, New Person(4, "Pippin Took", #4/4/1395#))
End Sub
Public Function GetPerson(ByVal id As Integer) As Person Implements IPersonService.GetPerson
Dim result As Person = Nothing
If _people.ContainsKey(id) Then
result = _people(id)
End If
Return result
End Function
Public Function GetPeople() As Person() Implements IPersonService.GetPeople
Dim result(_people.Count - 1) As Person
_people.Values.CopyTo(result, 0)
Return result
End Function
Public Sub UpdatePerson(ByVal p As Person) Implements IPersonService.UpdatePerson
If _people.ContainsKey(p.Id) Then
_people(p.Id) = p
End If
End Sub
End Class
Hosts
Sub Main()
Using host As New ServiceHost(GetType(Services.PersonService))
host.Open()
Console.WriteLine("Service started")
Console.ReadLine()
End Using
End Sub
End Module
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="MexEnabled">
<serviceMetadata httpGetEnabled="true" httpGetUrl="http://localhost:8081/PersonService" />
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service behaviorConfiguration="MexEnabled" name="Services.PersonService">
<endpoint
address="http://localhost:8081/PersonService"
binding="basicHttpBinding"
bindingConfiguration=""
contract="Services.IPersonService" />
</service>
</services>
</system.serviceModel>
</configuration>
Private _id As Integer
Private _name As String
Private _birthDate As DateTime
Public Sub New(ByVal id As Integer, ByVal name As String, ByVal birthDate As DateTime)
_id = id
_name = name
_birthDate = birthDate
End Sub
<DataMember()> _
Public Property Id() As Integer
Get
Return _id
End Get
Set(ByVal value As Integer)
_id = value
End Set
End Property
<DataMember()> _
Public Property Name() As String
Get
Return _name
End Get
Set(ByVal value As String)
_name = value
End Set
End Property
<DataMember()> _
Public Property BirthDate() As DateTime
Get
Return _birthDate
End Get
Set(ByVal value As DateTime)
_birthDate = value
End Set
End Property
Public Overrides Function ToString() As String
Return String.Format("{0} [Id:{1}; Birth Date: {2}]", _name, _id, _birthDate)
End Function
End Class
经过这些修改，我们的服务应该可以使用了。右键单击
System.Runtime.Serialization.DataContractAttribute([Namespace]:="http://schemas.datacontract.org/2004/07/Business"), _
System.SerializableAttribute()> _
Partial Public Class Person
Inherits Object
Implements System.Runtime.Serialization.IExtensibleDataObject
<System.NonSerializedAttribute()> _
Private extensionDataField As System.Runtime.Serialization.ExtensionDataObject
<System.Runtime.Serialization.OptionalFieldAttribute()> _
Private BirthDateField As Date
<System.Runtime.Serialization.OptionalFieldAttribute()> _
Private IdField As Integer
<System.Runtime.Serialization.OptionalFieldAttribute()> _
Private NameField As String
Public Property ExtensionData() As System.Runtime.Serialization.ExtensionDataObject Implements System.Runtime.Serialization.IExtensibleDataObject.ExtensionData
Get
Return Me.extensionDataField
End Get
Set
Me.extensionDataField = value
End Set
End Property
<System.Runtime.Serialization.DataMemberAttribute()> _
Public Property BirthDate() As Date
Get
Return Me.BirthDateField
End Get
Set
Me.BirthDateField = value
End Set
End Property
<System.Runtime.Serialization.DataMemberAttribute()> _
Public Property Id() As Integer
Get
Return Me.IdField
End Get
Set
Me.IdField = value
End Set
End Property
<System.Runtime.Serialization.DataMemberAttribute()> _
Public Property Name() As String
Get
Return Me.NameField
End Get
Set
Me.NameField = value
End Set
End Property
End Class
LoadListBox()
End Sub
Private Sub LoadListBox()
Using ws As New PersonServiceProxy.PersonServiceClient
PeopleListBox.DataSource = ws.GetPeople()
PeopleListBox.DisplayMember = "Name"
PeopleListBox.ValueMember = "Id"
End Using
PeopleListBox_SelectedIndexChanged(Me, EventArgs.Empty)
AddHandler PeopleListBox.SelectedIndexChanged, AddressOf PeopleListBox_SelectedIndexChanged
End Sub
现在，当用户选择
Using ws As New PersonServiceProxy.PersonServiceClient
_person = ws.GetPerson(CInt(PeopleListBox.SelectedValue))
IdTextBox.Text = _person.Id
NameTextBox.Text = _person.Name
BirthDateTextBox.Text = _person.BirthDate.ToShortDateString()
End Using
End Sub
最后，在
_person.Id = IdTextBox.Text
_person.Name = NameTextBox.Text
_person.BirthDate = CDate(BirthDateTextBox.Text)
Using ws As New PersonServiceProxy.PersonServiceClient
ws.UpdatePerson(_person)
End Using
LoadListBox()
End Sub
Public ReadOnly Property Id() As Integer
Get
Return _id
End Get
End Property
清理解决方案，并右键单击
<DataMember()> Private _id As Integer
<DataMember()> Private _name As String
<DataMember()> Private _birthDate As DateTime
Public Sub New(ByVal id As Integer, ByVal name As String, ByVal birthDate As DateTime)
_id = id
_name = name
_birthDate = birthDate
End Sub
Public ReadOnly Property Id() As Integer
Get
Return _id
End Get
End Property
Public Property Name() As String
Get
Return _name
End Get
Set(ByVal value As String)
_name = value
End Set
End Property
Public Property BirthDate() As DateTime
Get
Return _birthDate
End Get
Set(ByVal value As DateTime)
_birthDate = value
End Set
End Property
Public Overrides Function ToString() As String
Return String.Format("{0} [Id:{1}; Birth Date: {2}]", _name, _id, _birthDate)
End Function
End Class
既然我们更改了
Private _person As Business.Person = Nothing
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
LoadListBox()
End Sub
Private Sub LoadListBox()
Using ws As New PersonServiceProxy.PersonServiceClient
PeopleListBox.DataSource = ws.GetPeople()
PeopleListBox.DisplayMember = "Name"
PeopleListBox.ValueMember = "Id"
End Using
PeopleListBox_SelectedIndexChanged(Me, EventArgs.Empty)
AddHandler PeopleListBox.SelectedIndexChanged, AddressOf PeopleListBox_SelectedIndexChanged
End Sub
Private Sub PeopleListBox_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
Using ws As New PersonServiceProxy.PersonServiceClient
_person = ws.GetPerson(CInt(PeopleListBox.SelectedValue))
IdTextBox.Text = _person.Id
NameTextBox.Text = _person.Name
BirthDateTextBox.Text = _person.BirthDate.ToShortDateString()
End Using
End Sub
Private Sub SaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveButton.Click
_person.Name = NameTextBox.Text
_person.BirthDate = CDate(BirthDateTextBox.Text)
Using ws As New PersonServiceProxy.PersonServiceClient
ws.UpdatePerson(_person)
End Using
LoadListBox()
End Sub
End Class
你现在应该能够运行和测试完成的程序了。
Dim p As Business.Person
p = CType(PeopleListBox.SelectedItem, Business.Person)
MsgBox(p.ToString())
End Sub
当你单击按钮后，你看到的结果像如下样子：