Question

我一直致力于webservice并遇到了这个问题：

有什么区别：

<string xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://companyx.net/" xsi:nil="true"/>

和

<string xmlns="http://companyx.net/">[]</string>

询问的原因是因为我编写（尝试）了一个Web服务，如果我调用它，我会得到<string xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://companyx.net/" xsi:nil="true"/>和其他Web服务方法，我会在调用时返回<string xmlns="http://companyx.net/">[]</string>。我知道第二种方法返回一个项目数组，我需要这样做。我想返回一份联系人列表。

我的网络服务代码：

 <WebMethod()> _
<ScriptMethod(ResponseFormat:=ResponseFormat.Json, UseHttpGet:=True)> _
    Public Function ContactGet(ByVal searchField As String) As String

        Dim objSearch As New ArrayList
        Dim objSearching As New Search
        Dim intResult As Integer

        Try

            intResult = objSearching.SearchByKeyword(searchField, Session("Person"), Session("Office"), Session("Organisation"), _
                                                  Session("Role"), companyx.CXMyProperty.Search.enmSearchType.enmContact, objSearch)


                Dim objContact As New Person
                Dim dt As New DataTable("Contacts")

                Dim col_Name As New DataColumn("Name", GetType(String))
                dt.Columns.Add(col_Name)

                Dim col_Mobile As New DataColumn("Mobile", GetType(String))
                dt.Columns.Add(col_Mobile)

                Dim col_Office As New DataColumn("ContactNum", GetType(String))
                dt.Columns.Add(col_Office)

                Dim col_Category As New DataColumn("Category", GetType(String))
                dt.Columns.Add(col_Category)

                Dim dr As DataRow

                'add new row to datatable
                For Each objSearching In objSearch
                    dr = dt.NewRow()
                    dr("Name") = objContact.FullName
                    dr("Mobile:") = objContact.MobileNumber
                    dr("ContactNum") = objContact.OfficeNumber
                    dr("Category") = objContact.PersonRelationshipType
                    dt.Rows.Add(dr)
                Next

                Dim serializer As New JavaScriptSerializer()
                Dim rows As New List(Of Dictionary(Of String, Object))()
                Dim row As Dictionary(Of String, Object) = Nothing

                'serialize dt row to json output
                For Each drow As DataRow In dt.Rows
                    row = New Dictionary(Of String, Object)()
                    For Each col As DataColumn In dt.Columns
                        row.Add(col.ColumnName, dr(col))
                    Next
                    rows.Add(row)
                Next

                Dim str_json = JsonConvert.SerializeObject(dt, Formatting.Indented)

                Return str_json
        Catch ex As Exception
            Return Nothing
        End Try
    End Function

我不确定我是否正确编码了网络服务。对此非常陌生。

Answer 1

它们之间的区别在于，在一种情况下，字符串元素具有xsi：nil属性，而在另一种情况下，它具有＆＃34; []＆＃34;文本节点子。

这些可能有也可能没有相似或相同的语义：你需要询问设计这个词汇表的companyx.net上的人。

xml代码有什么区别

1 个答案: