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我有以下需要转换为其他形式的 xml。我有一个 C# 代码可以做到这一点，但它有一个很难跟踪的错误。我相信 Linq 可以提供一种更容易出错的方法来做到这一点。输入xml：

<NewDataSet>
  <Table>
    <RoleId>5</RoleId>
    <Code>DP</Code>
    <Description>Process data</Description>
    <Task>Validate indices</Task>
    <TaskId>12</TaskId>
    <Country>BE</Country>
    <CountryId>3</CountryId>
  </Table>
  <Table>
    <RoleId>5</RoleId>
    <Code>DP</Code>
    <Description>Process data</Description>
    <Task>calculate indices</Task>
    <TaskId>11</TaskId>
    <Country>US</Country>
    <CountryId>4</CountryId>
  </Table>
  <Table>
    <RoleId>5</RoleId>
    <Code>DP</Code>
    <Description>Process data</Description>
    <Task>Calculate indices</Task>
    <TaskId>11</TaskId>
    <Country>UK</Country>
    <CountryId>5</CountryId>
  </Table>
  <Table>
    <RoleId>1</RoleId>
    <Code>DR</Code>
    <Description>View data</Description>
    <Task>View Reports</Task>
    <TaskId>9</TaskId>
    <Country>SC</Country>
    <CountryId>17</CountryId>
  </Table>
  <Table>
    <RoleId>1</RoleId>
    <Code>DR</Code>
    <Description>View data</Description>
    <Task>View Basics</Task>
    <TaskId>10</TaskId>
    <Country>SC</Country>
    <CountryId>17</CountryId>
  </Table>
  <Table>
    <RoleId>1</RoleId>
    <Code>DR</Code>
    <Description>View data</Description>
    <Task>Download data</Task>
    <TaskId>11</TaskId>
    <Country>FR</Country>
    <CountryId>15</CountryId>
  </Table>
</NewDataSet>

我需要的输出如下：

<NewDataSet>
 <Table>
    <RoleId>5</RoleId>
    <Code>DP</Code>
    <Description>Process data</Description>
    <Task>Validate indices,Calculate indices,</Task>
    <TaskId>12,11</TaskId>
    <Country>BE,US,UK</Country>
    <CountryId>3,4,5</CountryId>
  </Table>
  <Table>
    <RoleId>1</RoleId>
    <Code>DR</Code>
    <Description>Process data from commercial fisheries</Description>
    <Task>View Reports,View Basics,View data</Task>
    <TaskId>9,10,11</TaskId>
    <Country>SC,FR</Country>
    <CountryId>17,15</CountryId>
  </Table>
</NewDataSet>

如您所见，元素按 RoleId、Code 和 Description 分组。

我创建了一个 custum 对象来将 xml 元素投影到

public class Table
{
   public int RoleId {get;set;}
   public string Code  {get;set;}
   public string  Description {get;set;}
   public string Task {get;set;}
   public int TaskId {get;set;}
   public string  Country {get;set;}
   public int CountryId  {get;set;}

}

然后的想法是使用这个 custum 对象列表来重新创建一个 xml 文档。但我在想可能有更直接的方式。无需使用自定义对象列表。

元素的其余部分被简单地连接起来。我希望有人对如何使用 Linq to XML 实现这一点有一个想法。提前谢谢了

4

1 回答 1

1 
var doc = XDocument.Load("Input.txt");

var tables = from t in doc.Root.Elements("Table")
             select new Table
             {
                 RoleId = (int)t.Element("RoleId"),
                 Code = (string)t.Element("Code"),
                 Description = (string)t.Element("Description"),
                 Task = (string)t.Element("Task"),
                 TaskId = (int)t.Element("TaskId"),
                 Country = (string)t.Element("Country"),
                 CountryId = (int)t.Element("CountryId")
             };

var groups = tables.GroupBy(x => new { x.RoleId, x.Code, x.Description });

var resultDoc = new XDocument(
                    new XElement("NewDataSet",
                        from g in groups
                        select new XElement("Table",
                                   new XElement("RoleID", g.Key.RoleId),
                                   new XElement("Code", g.Key.Code),
                                   new XElement("Description", g.Key.Description),
                                   new XElement("Task", string.Join(",", g.Select(x => x.Task))),
                                   new XElement("TaskId", string.Join(",", g.Select(x => x.TaskId.ToString()))),
                                   new XElement("Country", string.Join(",", g.Select(x => x.Country))),
                                   new XElement("CountryId", string.Join(",", g.Select(x => x.CountryId.ToString()))))));

它完全是 LINQ to XML 解决方案，尽管您应该考虑使用 XML 序列化更改解析部分。

结果 XML：

<NewDataSet>
  <Table>
    <RoleID>5</RoleID>
    <Code>DP</Code>
    <Description>Process data</Description>
    <Task>Validate indices,calculate indices,Calculate indices</Task>
    <TaskId>12,11,11</TaskId>
    <Country>BE,US,UK</Country>
    <CountryId>3,4,5</CountryId>
  </Table>
  <Table>
    <RoleID>1</RoleID>
    <Code>Data Reader</Code>
    <Description>View data</Description>
    <Task>View Reports,View Basics,Download data</Task>
    <TaskId>9,10,11</TaskId>
    <Country>SC,SC,FR</Country>
    <CountryId>17,17,15</CountryId>
  </Table>
</NewDataSet>
于 2013-08-27T10:16:55.590 回答