public void SetItem(DateInputItemType itemType, DateInputContextItem item)
{
Guard.ArgumentNotNull(nameof(item), item);
if (_haveValue && item.ValueSpecified)
{
throw new InvalidOperationException($"Value cannot be specified for both <{GetTagNameForItemType(itemType)}> and the parent <{RootTagName}>.");
}
var tagName = GetTagNameForItemType(itemType);
if (Fieldset != null)
{
throw new InvalidOperationException($"<{tagName}> must be inside <{FieldsetTagName}>.");
}
if (_items.Count != 0)
{
if (_items.ContainsKey(itemType))
{
throw ExceptionHelper.OnlyOneElementIsPermittedIn(tagName, DateInputTagHelper.TagName);
}
var subsequentItems = _items.Where(kvp => kvp.Key > itemType).ToArray();
if (subsequentItems.Length != 0)
{
throw ExceptionHelper.ChildElementMustBeSpecifiedBefore(
tagName,
GetTagNameForItemType(subsequentItems[0].Key));
}
}
_items.Add(itemType, item);
}
internal static string GetTagNameForItemType(DateInputItemType itemType) => itemType switch
{