Question

我有以下XML

    <departments>
      <dept operationalStatus="active" primaryRole="Admin" depChangeDate="20130420">        
        <startDate type="legal">20130401</startDate>
        <endDate type="legal"></endDate>
        <startDate type="operational">20130320</startDate>
        <endDate type="operational"></endDate>  
      <DeptRoles>           
        <DeptRole name="Other dept" status="active">
            <startDate type="legal">20130401</startDate>
            <endDate type="legal"></endDate>
            <startDate type="operational">20130320</startDate>
            <endDate type="operational"/>
            <isPrimary/>                
        </DeptRole>
      </DeptRoles>
    </dept>
   </departments>

我有大约200K条记录从xml文件上传到数据库。我想从一个表中的xml文件中获取以下数据 operationalStatus，primaryRole，depChangeDate，startDate类型legal及其值和startDate类型操作及其值我可以访问startDate类型的法律元素，但无法访问startDate类型操作。以及来自DeptRole元素的以下数据到另一个表中。 DeptRole名称，status，startDate类型legal及其值和startDate类型操作及其值。什么是最好的方法，我该怎么做。主要是我遇到访问以下值的问题

    <startDate type="legal">20130401</startDate>
<endDate type="legal"></endDate>
<startDate type="operational">20130320</startDate>
<endDate type="operational"></endDate>

Answer 1

这有帮助吗？

string data = "<your xml data>";
XElement elem = XElement.Parse(data);

var departments = elem.Descendants("dept").ToList();
foreach (var dept in departments)
{
    var sLegal = dept.Elements("startDate")
            .First(p => p.Attribute("type").Value == "legal").Value;
    var eLegal = dept.Elements("endDate")
            .First(p => p.Attribute("type").Value == "legal").Value;
    var sOp = dept.Elements("startDate")
            .First(p => p.Attribute("type").Value == "operational").Value;
    var eOp = dept.Elements("endDate")
            .First(p => p.Attribute("type").Value == "operational").Value;
    var attr=dept.Attribute("operationalStatus");
    var opStatus = attr == null ? "" : attr.Value;                
    attr = dept.Attribute("primaryRole");
    var primaryRole = attr == null ? "" : attr.Value;                
    attr = dept.Attribute("depChangeDate");
    var depChangeDate = attr == null ? "" : attr.Value;
    //do something with the values
}

Answer 2

有几种选择，但您会喜欢这个：

http://blogs.msdn.com/b/cdndevs/archive/2013/09/27/web-essentials-for-visual-studio-open-data-made-simple.aspx

它允许您复制＆＃39; xml然后＆＃39;粘贴＆＃39;一个c＃类。序列化或反序列化将导致您用于生成该类的xml。

Answer 3

可以通过以下方式实现

将XML转换为DataSet（）对象，并应用LINQ来获取所需的列（或）
在XMLDocument上应用XPATH

- SJ

Answer 4

试试这个： Dim doc As XDocument = XDocument.Load（＆＃34; PurchaseOrder.xml＆＃34;） Xdocument是System.Linq命名空间中的一个类，所以从这一点开始有一些方法可以通过LINQ访问它。

Answer 5

它会起作用......

  var readAll = from a in xd.Descendants("departments")


                      select new
                      {
                          DeptOperationalStatus = a.Element("dept").Attribute("operationalStatus").Value,
                          DeptPrimaryRole = a.Element("dept").Attribute("primaryRole").Value,
                          DeptChangeDate = a.Element("dept").Attribute("depChangeDate").Value,

                          LegalStartDate = a.Element("dept").Elements("startDate").First(cc => cc.Attribute("type").Value == "legal").Value,
                          LegalEndDate = a.Element("dept").Elements("endDate").First(cc => cc.Attribute("type").Value == "legal").Value,

                          OperationalStartDate = a.Element("dept").Elements("startDate").First(cc => cc.Attribute("type").Value == "operational").Value,
                          OperationEndDate = a.Elements("dept").Elements("endDate").First(cc => cc.Attribute("type").Value == "operational").Value,

                          // Dept Roles

                          DeptRoleName = a.Element("dept").Element("DeptRoles").Element("DeptRole").Attribute("name").Value,
                          DeptRoleStatus = a.Element("dept").Element("DeptRoles").Element("DeptRole").Attribute("status").Value,

                          DeptLegalStartDate = a.Element("dept").Element("DeptRoles").Element("DeptRole").Elements("startDate").First(cc => cc.Attribute("type").Value == "legal").Value,
                          DeptLegalEndDate = a.Element("dept").Element("DeptRoles").Element("DeptRole").Elements("endDate").First(cc => cc.Attribute("type").Value == "legal").Value,

                          DeptOperationalStartDate = a.Element("dept").Element("DeptRoles").Element("DeptRole").Elements("startDate").First(cc => cc.Attribute("type").Value == "operational").Value,
                          DeptOperationalEndDate = a.Element("dept").Element("DeptRoles").Element("DeptRole").Elements("endDate").First(cc => cc.Attribute("type").Value == "operational").Value,



                      };

如何阅读复杂的XML

5 个答案: