public static IEnumerable<TreeNode> LazyGetItemsOfIList(TreeNode parent, Expression targetObject)
{
// Add a cast, so that we are sure the expression has an indexer.
// (The expression can be e.g. of type 'object' but its value is a List.
// Without the cast, evaluating "expr[i]" would fail, because object does not have an indexer).
targetObject = targetObject.CastToIList();
int count = 0;
GetValueException error = null;
try {
count = targetObject.GetIListCount();
} catch (GetValueException e) {
// Cannot yield a value in the body of a catch clause (CS1631)
error = e;
}
if (error != null) {
yield return new TreeNode(null, "(error)", error.Message, null, null, null);
} else if (count == 0) {
yield return new TreeNode(null, "(empty)", null, null, null, null);
} else {
for(int i = 0; i < count; i++) {
string imageName;
var image = ExpressionNode.GetImageForArrayIndexer(out imageName);
var itemNode = new ExpressionNode(parent, image, "[" + i + "]", targetObject.AppendIndexer(i));
itemNode.ImageName = imageName;
yield return itemNode;
}
}
}
void LoadNodeCollectionContent(AbstractNode node, Expression thisObject, DebugType iListType)
{
thisObject = thisObject.CastToIList();
int listCount = thisObject.GetIListCount();
PropertyInfo indexerProp = iListType.GetProperty("Item");
for (int i = 0; i < listCount; i++) {
Expression itemExpr = thisObject.AppendIndexer(i);
PropertyNode itemNode = new PropertyNode(
new ObjectGraphProperty { Name = "[" + i + "]", MemberInfo = indexerProp, Expression = itemExpr, Value = "", IsAtomic = true, TargetNode = null });
node.AddChild(itemNode);
}
}
