I am trying to poulate all the elements of an order to a listbox. The listbox just adds the collection, not the elements. Please help!
XDocument doc = XDocument.Load(Server.MapPath("App_Data/Orders.xml"));
string order = ddl.SelectedValue;
var results = doc.Descendants("Order").Where(o => o.Attribute("OrderNumber").Value == "SO43659")
.Select(o => o.Elements("LineItem"));
foreach (var r in results)
{
ListBox1.Items.Add(new ListItem(r.ToString()));
}
xml fragment:
<Order OrderNumber="SO43659">
<LineItem Line="1" PID="349" Qty="1" Price="2024.9940" Freight="50.6249" />
<LineItem Line="2" PID="350" Qty="3" Price="2024.9940" Freight="151.8746" />
<LineItem Line="3" PID="351" Qty="1" Price="2024.9940" Freight="50.6249" />
<LineItem Line="4" PID="344" Qty="1" Price="2039.9940" Freight="50.9999" />
<LineItem Line="5" PID="345" Qty="1" Price="2039.9940" Freight="50.9999" />
<LineItem Line="6开发者_如何学编程" PID="346" Qty="2" Price="2039.9940" Freight="101.9997" />
<LineItem Line="7" PID="347" Qty="1" Price="2039.9940" Freight="50.9999" />
<LineItem Line="8" PID="229" Qty="3" Price="28.8404" Freight="2.1630" />
<LineItem Line="9" PID="235" Qty="1" Price="28.8404" Freight="0.7210" />
<LineItem Line="10" PID="218" Qty="6" Price="5.7000" Freight="0.8550" />
<LineItem Line="11" PID="223" Qty="2" Price="5.1865" Freight="0.2593" />
<LineItem Line="12" PID="220" Qty="4" Price="20.1865" Freight="2.0187" />
</Order>
var results = doc.Descendants("Order")
.Where(o => o.Attribute("OrderNumber").Value == "SO43659")
.FirstOrDefault();
foreach (var r in results.Elements("LineItem"))
{
ListBox1.Items.Add(new ListItem(r.ToString()));
}
If you didn't use var
, you'd see what's wrong - each elements of results
is a sequence of elements. Here's your code without var
:
IEnumerable<IEnumerable<XElement>> results =
doc.Descendants("Order")
.Where(o => o.Attribute("OrderNumber").Value == "SO43659")
.Select(o => o.Elements("LineItem"));
foreach (IEnumerable<XElement> r in results)
{
ListBox1.Items.Add(new ListItem(r.ToString()));
}
I suspect that's not what you're after. You could use this instead:
// Will go bang if there isn't exactly one matching order
IEnumerable<XElement> results =
doc.Descendants("Order")
.Where(o => o.Attribute("OrderNumber").Value == "SO43659")
.Single()
.Select(o => o.Elements("LineItem"));
Or:
// Will find *all* the LineItem elements under *all* matching orders
IEnumerable<XElement> results =
doc.Descendants("Order")
.Where(o => o.Attribute("OrderNumber").Value == "SO43659")
.SelectMany(o => o.Elements("LineItem"));
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