创建一个Web服务请求

Question

我想将数据提供给一个代理，该代理创建一个如下所示的soap XML请求：

<dat:MusicCollection>
           <!--Zero or more repetitions:-->
           <dat:Song>
              <dat:songUserkey>TakemeHome</dat:songUserkey>
           </dat:Song>
</dat:MusicCollection>

我已经编写了文件来调用该服务并提供以下详细信息：

dim ucizi1 as SongRequest 'this is the request class in the proxy
dim Songs as Song = New Song
Songs.songUserKey = "TakeMeHome"
dim ucz
ucz = Songs.SongUserKey
ucizi1.SongCollection.Add(ucz)

MusicCollection类如下：

<System.Diagnostics.DebuggerStepThroughAttribute(),  _
 System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "4.0.0.0"),  _
 System.Runtime.Serialization.CollectionDataContractAttribute(Name:="ProductCollection", [Namespace]:="http://ucizi.Musicservice/DataContracts", ItemName:="Song")>  _
Public Class SongCollection
    Inherits System.Collections.Generic.List(Of ucizi.Music.DataContracts.Song)
End Class

歌曲类别如下：

<System.Diagnostics.DebuggerStepThroughAttribute(),  _
 System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "4.0.0.0"),  _
 System.Runtime.Serialization.DataContractAttribute(Name:="Product", [Namespace]:="http://Ucizi.Music/DataContracts")>  _
Partial Public Class Product
    Inherits Object
    Implements System.Runtime.Serialization.IExtensibleDataObject

    Private extensionDataField As System.Runtime.Serialization.ExtensionDataObject

    Private SongUserkeyField 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(IsRequired:=true)>  _
    Public Property SongUserkey() As String
        Get
            Return Me.SongUserkeyField
        End Get
        Set
            Me.SongUserkeyField = value
        End Set
    End Property
End Class

但是，当我运行此代码时，出现错误：无法将类型为“ system.string”的对象转换为类型为“ ucizi.music.DataContracts.Song”的对象。

我看不到此错误的来源，请提供一些帮助，并建议我如何纠正此错误。

Answer 1

排队

Songs.songUserKey = "TakeMeHome"
dim ucz
ucz = Songs.SongUserKey
ucizi.SongCollection.Add(ucz)

您将ucz设置为SongUserKey这是字符串。

然后，将其添加到集合SongCollection中

Public Class SongCollection
    Inherits System.Collections.Generic.List(Of ucizi.Music.DataContracts.Song)
End Class

哪Song

Answer 2

在Songs.songUserKey =“ TakeMeHome”之后添加了以下代码

dim ucizi2 as songCollection
ucizi2.Add(song)
ucizi1.songcollection = ucizi2

这样可以顺利地解决问题。 你们睁开了我的眼睛。