在vb.net中读取XML文件的逻辑 [英] Logic to reading an XML file in vb.net

问题描述

我有一个XML文件，我正在尝试使用vb.net读取并重写（以便以后操作）到新的文本文件。

I have an XML file that i am trying to read and rewrite (for later manipulation) to a new text file using vb.net.

我能够成功读取XML并将其打印出来，但是我在使用每个元素/属性的开始和结束标记时遇到问题。

I am able to read the XML successfully and print it out, but i am having problems getting the correct with then start and end tags of each element/attribute.

我正在使用'xmlNodeReader '通过获取每个读取的名称和值来阅读文档。
然后一个选择案例 xmlNodeType.Element 或 xmlNodeType.EndElement

I am using an 'xmlNodeReader' to read the document by getting the name and value of each read. Then a select case with xmlNodeType.Element or xmlNodeType.EndElement

如何获得正确的逻辑来解决这个问题，因为一些XML行的形式是< Server Type =PropertyDefinitions> 和其他的格式为< Server Type =aServerName/>

How do I get the correct logic to solve this, as some XML lines are in the form <Server Type="PropertyDefinitions"> and others are in the form <Server Type="aServerName"/>

我尝试了一个if循环 endEntity 除其他外，似乎都没有效果。这是我的代码的一部分，它显示了读写函数。
如果我没有提供足够的信息，请告诉我。

Ive tried a if loop for endEntity among other things but none seemed to work. Here is (part of) my code which shows the read and write function. If I haven't provided enough information, please let me know.

     Dim reader As XmlNodeReader = New XmlNodeReader(document)
     Dim result As New StringBuilder
      While reader.Read
        Select Case reader.NodeType

            Case XmlNodeType.Element
            result.Append("<" & reader.Name)

                    If reader.HasAttributes Then
                        While reader.MoveToNextAttribute()
                            result.Append(" " + reader.Name + "=" + Chr(34) + reader.Value + Chr(34))
                        End While

                        If XmlNodeType.EndEntity Then
                            result.Append("/>")
                        End If
                    Else
                        If XmlNodeType.Entity Then
                            result.Append(">")
                        ElseIf XmlNodeType.EndEntity Then
                            result.Append("/>")
                        End If
                    End If

            Case XmlNodeType.EndElement
                result.Append("</" + reader.Name + ">")

        End Select
    End While

显示3种不同类型的XML的示例示例标签：

Example sample of the XML which shows the 3 different types of tags:

    <DocumentSMG Version="6.900000" VersionSeemage="6.12.0.2428">
     <Server Type="PropertyDefinitions">
        <MetaProperties>
        </MetaProperties>
     </Server>
      <Server Type="aServerType1">
        <BOM.Sort.Ascendant Value="1"/>
     </Server>
      <Server Type="aServerType2"/>
      <Server Type="aServerType3"/>
    </DocumentSMG>

推荐答案

试试这个

Imports System.Xml
Imports System.Xml.Linq
Module Module1
    Const FILENAME As String = "c:\temp\test.xml"
    Sub Main()
        Dim reader As XmlReader = XmlReader.Create(FILENAME)

        While Not reader.EOF
            If reader.Name <> "Server" Then
                reader.ReadToFollowing("Server")
            End If
            If Not reader.EOF Then
                Dim server As XElement = XElement.ReadFrom(reader)
                Dim type As String = server.Attribute("Type")
                Select Case type
                    Case "PropertyDefinitions"

                    Case "aServerType1"

                    Case "aServerType2"

                    Case "aServerType3"

                End Select

            End If

        End While



    End Sub

End Module

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