堆栈内存溢出
  简体   繁体   English

如何使用C＃在xml文件的子节点下读取具有相同名称的多个标签？

[英]How to read multiple tags with same name under child node in a xml file using c#?

 原文  2016-11-04 05:43:20  7   2    c#/ xml/ linq

问题描述

For below xml i want to read all row nodes value, as you can see there are multiple row tags under subcategory tag, so for particular subcategory(suppose for SubCategory ID="Standard") i want to fetch all row tags? 对于下面的xml，我想读取所有行节点的值，如您所见，在subcategory标签下有多个行标签，因此对于特定的subcategory（假设SubCategory ID =“ Standard”），我想获取所有行标签？ How to do this using c#? 如何使用C＃做到这一点？ 

<DPS>
  <Category ID="Handsets">
    <Device ID="Samsung">
      <Contract ID="twoFour">
        <Tariff ID="Standard4G">
          <SubCategory ID="Standard">
            <Row>
              <Minutes>"Minutes":"999999"</Minutes>
              <Texts>"Texts":"99999"</Texts>
              <Data>"Data":"10000"</Data>
              <Content>"Content":"No"</Content>
              <Roaming>"Roaming":"Y + 2000"</Roaming>
              <Monthly>"Monthly":"38"</Monthly>
              <Upfront>"Upfront":0"</Upfront>
            </Row>
            <Row>
              <Minutes>Minutes:999</Minutes>
              <Texts>Texts:99994569</Texts>
              <Data>Data:100</Data>
              <Content>Content:No</Content>
              <Roaming>Roaming:Y + 2000</Roaming>
              <Monthly>Monthly:398</Monthly>
              <Upfront>Upfront:0</Upfront>
            </Row>
            <Row>
              <Minutes>Minutes:99</Minutes>
              <Texts>Texts:92569</Texts>
              <Data>Data:10</Data>
              <Content>Content:No</Content>
              <Roaming>Roaming:Y + 2000</Roaming>
              <Monthly>Monthly:38</Monthly>
              <Upfront>Upfront:0</Upfront>
            </Row>
          </SubCategory>
          <SubCategory ID="RedValue">
            <Row>
              <Minutes>"Minutes":"999999"</Minutes>
              <Texts>"Texts":"99999"</Texts>
              <Data>"Data":"10000"</Data>
              <Content>"Content":"No"</Content>
              <Roaming>"Roaming":"Y + 2000"</Roaming>
              <Monthly>"Monthly":"38"</Monthly>
              <Upfront>"Upfront":0"</Upfront>
            </Row>
            <Row>
              <Minutes>Minutes:999</Minutes>
              <Texts>Texts:99994569</Texts>
              <Data>Data:100</Data>
              <Content>Content:No</Content>
              <Roaming>Roaming:Y + 2000</Roaming>
              <Monthly>Monthly:398</Monthly>
              <Upfront>Upfront:0</Upfront>
            </Row>
            <Row>
              <Minutes>Minutes:99</Minutes>
              <Texts>Texts:92569</Texts>
              <Data>Data:10</Data>
              <Content>Content:No</Content>
              <Roaming>Roaming:Y + 2000</Roaming>
              <Monthly>Monthly:38</Monthly>
              <Upfront>Upfront:0</Upfront>
            </Row>
          </SubCategory>
        </Tariff>
      </Contract>
    </Device>
  </Category>
</DPS>

2 个解决方案

解决方案1
 1  2016-11-04 06:03:11

First, load the XML into an XDocument. 首先，将XML加载到XDocument中。 

var xdoc = XDocument.Parse(xml); // Or XDocument.Load(pathToXmlFile), etc....

Then you can query all the SubCategory elements for the one with the ID of "Standard" and lastly ask for all of its child elements, the rows. 然后，您可以在所有SubCategory元素中查询ID为“ Standard”的一个，最后要求其所有子元素（行）。 

var rows = xdoc.Descendants("SubCategory")
  .Where(sc => sc.Attribute("ID").Value == "Standard")
  .Elements();

Edit : To get the actual values from the above XML, this is one way to do it. 编辑 ：要从上述XML中获取实际值，这是一种方法。

I made an inline function to get a given element from the row by name and handle stripping out unwanted characters from it. 我做了一个内联函数，以按名称从行中获取给定元素，并处理从中删除不需要的字符。 

Func<XElement, string, string> getElementValue = (XElement row, string name)
    => row.Element(name).Value
        .Split(':').Last() // Take only the right side of the colons
        .Trim('"'); // Remove the double quotes, if any

Then, we can use it to get all the expected properties for each row: 然后，我们可以使用它来获取每一行的所有预期属性： 

var rowData = rows.Select(x => new {
    Minutes = getElementValue(x, "Minutes"),
    Texts = getElementValue(x, "Texts"),
    Data = getElementValue(x, "Data"),
    Content = getElementValue(x, "Content"),
    Roaming = getElementValue(x, "Roaming"),
    Monthly = getElementValue(x, "Monthly"),
    Upfront = getElementValue(x, "Upfront")
});

For real usage, you'll probably want to make a class with the properties like Minutes, Texts, etc. defined on it if you don't already and then put that class name after the new keyword where the rows are being selected. 为了实际使用，如果您尚未定义类，则可能要创建一个类，该类具有诸如Minutes，Texts等的属性，然后将该类名放在要选择行的new关键字之后。

Edit 2 : With the extra bits of text in each element acknowledged as "typing error", you can skip the inline function altogether and simplify the rowData select to this: 编辑2 ：将每个元素中的多余文本确认为“键入错误”，您可以完全跳过内联函数，并将rowData选择简化为： 

var rowData = rows.Select(x => new {
    Minutes = x.Element("Minutes").Value,
    Texts = x.Element("Texts").Value,
    Data = x.Element("Data").Value,
    Content = x.Element("Content").Value,
    Roaming = x.Element("Roaming").Value,
    Monthly = x.Element("Monthly").Value,
    Upfront = x.Element("Upfront").Value
});

解决方案2
 0  2016-11-04 11:09:47

This VB code could not be converted to C# using the converter I have access to. 无法使用我可以访问的转换器将此VB代码转换为C＃。 I knew the XML literal doesn't have a counterpart in C#, but isn't needed for anything but to have some test data. 我知道XML文字在C＃中没有对应的文字，但是除了具有一些测试数据外，不需要任何其他内容。

Since the XML seems well structured I created a series of classes that mimics the data. 由于XML看起来结构良好，因此我创建了一系列模拟数据的类。 They are just a starting point because I didn't know the ins and outs of the data. 它们只是一个起点，因为我不知道数据的来龙去脉。

Lets start at the end by looking at each row in Standard. 让我们从查看Standard的每一行开始。 Debugs were added to help visualize. 添加了调试以帮助可视化。 

    Dim myDPS As New DPS(xe)
    myDPS.Category.Device.Tariff.SubCategory.GetOnePart("Standard")
    Debug.WriteLine(myDPS.Category.Device.Tariff.SubCategory.OnePart.ToString)
    For Each el As XElement In myDPS.Category.Device.Tariff.SubCategory.Row.OnePart.Elements
        Debug.WriteLine(el.ToString)
    Next

Here are the classes. 这是课程。 

Public Class DPS : Inherits DPSBaseClass

    Public Category As DPSCategory

    Public Sub New(path As String)
        MyBase.New(XElement.Load(path))
    End Sub

    Public Sub New(element As XElement)
        MyBase.New(element)
        If Me.OnePart IsNot Nothing Then
            Me.Category = New DPSCategory(Me.OnePart)
        End If
    End Sub
End Class

Public Class DPSCategory : Inherits DPSBaseClass

    Public Device As DPSDevice

    Public Sub New(element As XElement)
        MyBase.New(element)
        If Me.OnePart IsNot Nothing Then
            Me.Device = New DPSDevice(Me.OnePart)
        End If
    End Sub
End Class

Public Class DPSDevice : Inherits DPSBaseClass

    Public Tariff As DPSTariff

    Public Sub New(element As XElement)
        MyBase.New(element)
        If Me.OnePart IsNot Nothing Then
            Me.Tariff = New DPSTariff(Me.OnePart)
        End If
    End Sub
End Class

Public Class DPSTariff : Inherits DPSBaseClass

    Public SubCategory As DPSSubCategory

    Public Sub New(element As XElement)
        MyBase.New(element)
        If Me.OnePart IsNot Nothing Then
            Me.SubCategory = New DPSSubCategory(Me.OnePart)
        End If
    End Sub
End Class

Public Class DPSSubCategory : Inherits DPSBaseClass

    Public Row As DPSSubCategoryRow

    Public Sub New(element As XElement)
        MyBase.New(element)
        If Me.OnePart IsNot Nothing Then
            Me.Row = New DPSSubCategoryRow(Me.OnePart)
        End If
    End Sub
End Class

Public Class DPSSubCategoryRow : Inherits DPSBaseClass

    Public Sub New(element As XElement)
        MyBase.New(element)
    End Sub
End Class

Public MustInherit Class DPSBaseClass

    Private TheData As XElement
    Private DataParts As New List(Of XElement)
    Public OnePart As XElement

    Public Sub New(path As String)
        Me.New(XElement.Load(path))
    End Sub

    Public Sub New(element As XElement)
        Me.TheData = element
        Me.GetDataParts()
    End Sub

    Public Sub GetDataParts()
        Me.DataParts = (From el In Me.TheData.Elements Select el).ToList
        Me.GetOnePart("")
    End Sub

    Public Sub GetOnePart(ID As String)
        If Me.DataParts.Count > 0 Then
            If ID <> "" Then
                Me.OnePart = (From el In Me.DataParts Where el.@ID = ID Select el Take 1).FirstOrDefault
            Else
                Me.OnePart = Me.DataParts.FirstOrDefault
            End If
        End If
    End Sub

End Class

Here is that pesky XML literal that was used to test 这是用来测试的讨厌的XML文字 

    Dim xe As XElement = <DPS>
                             <Category ID="Handsets">
                                 <Device ID="Samsung">
                                     <Contract ID="twoFour">
                                         <Tariff ID="Standard4G">
                                             <SubCategory ID="Standard">
                                                 <Row>
                                                     <Minutes>"Minutes":"999999"</Minutes>
                                                     <Texts>"Texts":"99999"</Texts>
                                                     <Data>"Data":"10000"</Data>
                                                     <Content>"Content":"No"</Content>
                                                     <Roaming>"Roaming":"Y + 2000"</Roaming>
                                                     <Monthly>"Monthly":"38"</Monthly>
                                                     <Upfront>"Upfront":0"</Upfront>
                                                 </Row>
                                                 <Row>
                                                     <Minutes>Minutes:999</Minutes>
                                                     <Texts>Texts:99994569</Texts>
                                                     <Data>Data:100</Data>
                                                     <Content>Content:No</Content>
                                                     <Roaming>Roaming:Y + 2000</Roaming>
                                                     <Monthly>Monthly:398</Monthly>
                                                     <Upfront>Upfront:0</Upfront>
                                                 </Row>
                                                 <Row>
                                                     <Minutes>Minutes:99</Minutes>
                                                     <Texts>Texts:92569</Texts>
                                                     <Data>Data:10</Data>
                                                     <Content>Content:No</Content>
                                                     <Roaming>Roaming:Y + 2000</Roaming>
                                                     <Monthly>Monthly:38</Monthly>
                                                     <Upfront>Upfront:0</Upfront>
                                                 </Row>
                                             </SubCategory>
                                             <SubCategory ID="RedValue">
                                                 <Row>
                                                     <Minutes>"Minutes":"999999"</Minutes>
                                                     <Texts>"Texts":"99999"</Texts>
                                                     <Data>"Data":"10000"</Data>
                                                     <Content>"Content":"No"</Content>
                                                     <Roaming>"Roaming":"Y + 2000"</Roaming>
                                                     <Monthly>"Monthly":"38"</Monthly>
                                                     <Upfront>"Upfront":0"</Upfront>
                                                 </Row>
                                                 <Row>
                                                     <Minutes>Minutes:999</Minutes>
                                                     <Texts>Texts:99994569</Texts>
                                                     <Data>Data:100</Data>
                                                     <Content>Content:No</Content>
                                                     <Roaming>Roaming:Y + 2000</Roaming>
                                                     <Monthly>Monthly:398</Monthly>
                                                     <Upfront>Upfront:0</Upfront>
                                                 </Row>
                                                 <Row>
                                                     <Minutes>Minutes:99</Minutes>
                                                     <Texts>Texts:92569</Texts>
                                                     <Data>Data:10</Data>
                                                     <Content>Content:No</Content>
                                                     <Roaming>Roaming:Y + 2000</Roaming>
                                                     <Monthly>Monthly:38</Monthly>
                                                     <Upfront>Upfront:0</Upfront>
                                                 </Row>
                                             </SubCategory>
                                         </Tariff>
                                     </Contract>
                                 </Device>
                             </Category>
                         </DPS>

Hope it sparks some ideas. 希望它能激发一些想法。 Again, sorry for the VB. 再次，对VB感到抱歉。 I did try to convert it. 我确实尝试过将其转换。

暂无
暂无

声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

相关问题 如何在c＃中读取与父级同名的xml节点子级 - How do I read an xml node child that has same name as parent in c# 使用相同的节点名称读取C＃中的XML文件 - Read XML File in C# with same node name 如何在C＃中使用XDocument编辑具有相同名称的XML节点 - How to Edit XML node with same name using XDocument in C# C＃XML读取：读取具有相同节点名称的节点 - c# XML read: read of nodes with same node name 多个具有相同名称的标签上的C＃XML Linq - C# XML Linq on multiple tags of same name 使用ASP.NET C＃从具有相同名称的XML读取子节点 - Reading child node from XML with same name using asp.net c# 如何使用C＃在WebAPI中读取具有相同名称的多个Cookie - How to read multiple cookie with same name in webapi using C# 如何使用C＃从当前xml节点列表中读取子节点值？ - How to read child node value from current xml node list using C#? C＃Linq XML查询，其中基于子节点值来自父节点的多个同名元素 - C# Linq XML Query where multiple elements of same name from a parent node based on a child node value 使用C＃选择具有特定名称的XML子节点 - Select a child node in XML with specific name using C#
相关标签
 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM