I can't get my SharePoint ListItem Fields - silverlight

Question

I want to show all fields of a certain ListItem. This includes LookUpFields and ChoiceFields. But I only seem to be able to show Textfields, like Title. How can I show all fields of my ListItem?
The problem is that I get an error when I try to show other fields of a listitem the way I got 'Title' to show, as if the strings I type in don't exist as fields in that listitem. But they do exist and are populated with values!
What is good way to show custom fields of a listitem without getting ObjectReference errors?
Also I get this error: The given key was not present in the dictionary.
private void foo()
{
using (ClientContext context = new ClientContext(ApplicationContext.Current.Url))
{
_list = context.Web.Lists.GetByTitle("MyList").Title);
_items = _list.GetItems(CamlQuery.CreateAllItemsQuery());
context.Load(_items);
context.ExecuteQueryAsync(
new ClientRequestSucceededEventHandler(OnListItemsRequestSucceeded),
new ClientRequestFailedEventHandler(OnListItemsRequestFailed));
}
}
private void OnListItemsRequestSucceeded(Object sender, ClientRequestSucceededEventArgs args)
{
// this is not called on the UI thread
Dispatcher.BeginInvoke(ShowListItemDetails);
}
public void ShowListItemDetails()
{
foreach (ListItem i in _items)
{
TextBox_Details.Text += i["Title"].ToString() + Environment.NewLine;
// Now the rest of the fields of this item.
}
}
Edit: What also is a big problem is I cant get the debugger working. This code is running as a Silverlight webpart on a local Sharepoint site. I attach the debugger to the iexplorer.exe but it won't break.
If I could get the debugger to work it would be a great help indeed.

Answer 1

you have tell the query what all fields you need to pull from lists
CamlQuery camlQuery = new CamlQuery();
camlQuery.ListItemCollectionPosition = itemPosition;
camlQuery.ViewXml =
#"<View>
<ViewFields>
<FieldRef Name='Title'/>
<FieldRef Name='Category'/>
<FieldRef Name='Estimate'/>
</ViewFields>
<RowLimit>10</RowLimit>
</View>";
ListItemCollection listItems = list.GetItems(camlQuery);
clientContext.Load(listItems);
clientContext.ExecuteQuery();
for more details
http://msdn.microsoft.com/en-us/library/ee857094.aspx#SP2010ClientOM_Accessing_Large_Lists

Answer 2

To get item properties you will need to specify all the item properties you need in the second parameter of the ClientContext.Load method
e.g
string server = "http://localhost";
ClientContext context = new ClientContext(server);
Web web = context.Web;
var spList = web.Lists.GetByTitle("MyTitle");
CamlQuery query = new CamlQuery();
var items = spList.GetItems(query);
context.Load(items,
itema => itema.Include(
item => item,
item => item["ComplexProperty"]));
context.ExecuteQuery();`