Output 将 XML-File 转换为 Listview

Question

i want to read a XML-File and load the Content in a listview.

At first the XML-File:

<?xml version="1.0"?>

<Budget_Table>

    <budgets>

        <Einnahmen>10€</Einnahmen>
        <Anmerkung_Einnahme>Win</Anmerkung_Einnahme>    
        <Ausgaben>6€</Ausgaben>
        <Anmerkung_Ausgabe>Pizza</Anmerkung_Ausgabe>
        <Datum>12.03.2011</Datum>
    </budgets>

    <budgets>
        <Einnahmen></Einnahmen>
        <Anmerkung_Einnahme></Anmerkung_Einnahme>   
        <Ausgaben>6€</Ausgaben>
        <Anmerkung_Ausgabe>Pizza</Anmerkung_Ausgabe>
        <Datum>20.03.2011</Datum>
    </budgets>

</Budget_Table>

Ok this is the XML-File. In the Rows is the Content. The App should be something like a Budget Book.

Now the Listview and the whole Problem... I dont know how i should realise the Code. Should i use a Dataset, Datatables, Linq? Whats good?

At the end i wand to edit the Datas, delete and add. So i have to write to the xml, too.

I can do:

DataSet dataset= new DataSet();
dataset.ReadXml("budget.xml");

But then how can i read the TAGs? , ... and all these are the Columns in the Listview. How can I use them right?

Hope you can give me some help.

Answer 1

Create a model (class) for a budget:

public class Budget{
 public string Einnahmen {get; set;}
 public string AnmerkungEinnahme {get; set;}
 public string Ausgaben {get; set;}
 public string AnmerkungAusgabe {get; set;}
 public DateTime Datum {get; set;}
}

Then, use Linq to populate a collection of Budget items:

public static List<Budget> GetBudgets()
{
    XDocument data = XDocument.Load(HttpContext.Current.Server.MapPath("~/Data/Budgets.xml"));

    return (from b in data.Descendants("Budget")
            orderby b.Attribute("Datum")
            select new Budget()
            {
                Einnahmen = b.Element("Einnahmen").Value,
                AnmerkungEinnahme= b.Element("Anmerkung_Einnahme").Value,
                Ausgaben = b.Element("Ausgaben").Value,
                AnmerkungAusgabe= b.Element("Anmerkung_Ausgabe").Value,
                Datum = b.Element("Datum").Value

            }).ToList();
}

You can now bind your listview to this object and use the <%# Eval("Einnahmen")%> construct to put out the right data.

Hope this helps. Chris.

Answer 2

you can select what you want to using select method from your dataset like

dataset.Tables["budgets"].Select("where Anmerkung_Einnahme=Win");

or you can use XPath to query your XML file by loading it into XmlDocument Object

XmlDocument doc = new XmlDocument();
doc.Load("FullPath");
XmlNode = doc.SelectNodes(@"/Budget_Table/budgets[Anmerkung_Einnahme=Win]");

these two example will return all budegts nodes with Anmerkung_Einnahme=Win;

to update your xml you can set the properties of the any node you selected and then save the XmlDocument into file

 doc.Save("FullPath");