从XML C＃获取子查询列表

Question

I am writing a code that reads from XML and put the information on the list. the information:

1. Employee Name
2. the months he already finish
3. the months he needs to work on.

and they are all exist in XML File.

I wrote this code :

List<MonthlyInformation> result =
                doc.Root.Elements().Descendants(nsXml + "MitarbeiterGroup")
                .Select(x => new MonthlyInformation
                {
                    Firstname = (string)x.Attribute("Group9"),
                    FinishedMonths = x.Descendants("Monat3").Select(s => new FinishedMonth {MonthName = (string)s.Attribute("Monat3"), Money = (string)s.Element("Cell").Attribute("Textbox142") }).ToList(),
                    ForecastMonths = x.Descendants("Monat9").Select(s => new ForecastMonth { MonthName = (string)s.Attribute("Monat9"), Money = (string)s.Element("Cell").Attribute("Textbox143") }).ToList()
                }).ToList();

the code works fine but both the FinishedMonths and ForecastMonths datamember are always empty.

here is a part of the XML

<MitarbeiterGroup Group9="Name....">
            <Textbox111>
              <UmsatzInternGroup_Collection>
                <UmsatzInternGroup>
                  <Monat3 Monat3="Jan.">
                    <Cell Textbox142="11325" />
                  </Monat3>
                </UmsatzInternGroup>
                <UmsatzInternGroup>
                  <Monat3 Monat3="Feb.">
                    <Cell Textbox142="12345" />
                  </Monat3>
                </UmsatzInternGroup>
              </UmsatzInternGroup_Collection>
               <ForecastExternGroup_Collection>
                <ForecastExternGroup>
                  <Monat9 Monat9="Sep.">
                    <Cell Textbox143="17130" />
                  </Monat9>
                </ForecastExternGroup>
                <ForecastExternGroup>
                  <Monat9 Monat9="Okt.">
                    <Cell Textbox143="18000" />
                  </Monat9>
                </ForecastExternGroup>
              </ForecastExternGroup_Collection>
            </Textbox111>
      </MitarbeiterGroup>

so I need to get for every employee all the months in "Monat3" and all the forecast Months in "Monat9".

please if you can help as soon as possible

Answer 1

I'm not sure what your nsXml variable looks like, however changing this line doc.Root.Elements().Descendants(nsXml + "MitarbeiterGroup") to doc.Root.Elements()

worked for me.

Maybe you have the ns incorrect?

EDIT:

This is the XML I used

<MitarbeiterGroup Group9="Name....">
    <Textbox111>
        <UmsatzInternGroup_Collection>
            <UmsatzInternGroup>
                <Monat3 Monat3="Jan.">
                    <Cell Textbox142="11325" />
                </Monat3>
            </UmsatzInternGroup>
            <UmsatzInternGroup>
                <Monat3 Monat3="Feb.">
                    <Cell Textbox142="12345" />
                </Monat3>
                <ForecastExternGroup_Collection>
                    <ForecastExternGroup>
                        <Monat9 Monat9="Sep.">
                            <Cell Textbox143="17130" />
                        </Monat9>
                    </ForecastExternGroup>
                    <ForecastExternGroup>
                        <Monat9 Monat9="Okt.">
                            <Cell Textbox143="18000" />
                        </Monat9>
                    </ForecastExternGroup>
                </ForecastExternGroup_Collection>
            </UmsatzInternGroup>
        </UmsatzInternGroup_Collection>
    </Textbox111>
</MitarbeiterGroup>

EDIT:

use doc.Descendants("MitarbeiterGroup") instead of doc.Root.Elements().Descendants()

I beleive this has something to do with the way Elements() works. If you compare the following two:

var descendants = doc.Descendants().ToList();
var elements = doc.Elements().ToList();

You can see that Descendants() is a flat list of all the children where as Elements() is tree like hierarchy, and even though you are calling Descendants() you've already called Elements()

EDIT:

Inside the lambda where you again call x.Descendants() , instead of using calling it like x.Descendants("Monat3") or x.Descendants(XName.Get("Monat3")) it needs to be fully qualified (? not sure on the terminology) , it should look like x.Descendants(XName.Get("Monat3", ns))

string testURL = "XML.xml";
XDocument doc = XDocument.Load(testURL);
string ns = doc.Root.GetDefaultNamespace().ToString();
List<MonthlyInformation> result =
doc.Descendants(XName.Get("MitarbeiterGroup", ns))
.Select(x =>
new MonthlyInformation
{
    Name = (string)x.Attribute("Group9"),
    FinishedMonths = x.Descendants(XName.Get("Monat3", ns)).Select(s => new FinishedMonth
    {
        MonthName = (string)s.Attribute("Monat3"),
        Money = "money" //(string)s.Element("Cell").Attribute("Textbox142") 
    }).ToList(),
    ForecastMonths = x.Descendants(XName.Get("Monat9", ns)).Select(s => new ForecastMonth
    {
        MonthName = (string)s.Attribute("Monat9"),
        Money = "money" //(string)s.Element("Cell").Attribute("Textbox143")
    }).ToList()
}).ToList();