public static IEnumerable <LoopItem <TModel, TData> > LoopItems <TData>(HtmlHelper <TModel> htmlHelper, Expression <Func <TModel, IEnumerable <TData> > > listExpression, Func <TModel, int, TData> listFunc, IEnumerable <TData> enumerable)
{
var i = 0;
var enumerator = enumerable.GetEnumerator();
var next = enumerator.MoveNext();
var indexedExp = GetCurrentIndexedExpression(listExpression);
while (next)
{
var current = enumerator.Current;
next = enumerator.MoveNext();
var loopInfo = new LoopItem <TModel, TData> .LoopInfo(indexedExp(i), htmlHelper,
index : i,
isFirst : i == 0,
isLast : next == false,
isEven : i % 2 == 0,
isOdd : i % 2 != 0);
yield return(new LoopItem <TModel, TData>(listFunc, htmlHelper, current, loopInfo));
i++;
}
}
public static IEnumerable <LoopItem <TModel, TData> > Loop <TModel, TData>(this HtmlHelper <TModel> htmlHelper, Expression <Func <TModel, IEnumerable <TData> > > listExpression)
{
var enumerable = listExpression.Compile().Invoke(htmlHelper.ViewData.Model);
var listFunc = LoopItem <TModel, TData> .GetCurrentIndexedExpressionWithIntParam(listExpression).Compile();
return(LoopItem <TModel, TData> .LoopItems(htmlHelper, listExpression, listFunc, enumerable));
}
public IEnumerable <LoopItem <TModel, TData> > Loop <TData>(Expression <Func <T, IEnumerable <TData> > > listExpression)
{
var newExpression = CombineExpression(listExpression);
var compiledFunc2 = (Tuple <Func <T, IEnumerable <TData> >, Func <TModel, int, TData> >)cache.GetOrAdd(typeof(TData), y =>
{
var accessor = GetCurrentIndexedExpressionWithIntParam(newExpression).Compile();
var tuple = new Tuple <Func <T, IEnumerable <TData> >, Func <TModel, int, TData> >(listExpression.Compile(), accessor);
return(tuple);
});
var enumerable = compiledFunc2.Item1(_listFunc.Invoke(_htmlHelper.ViewData.Model, Info.Index));
return(LoopItem <TModel, TData> .LoopItems(_htmlHelper, newExpression, compiledFunc2.Item2, enumerable));
}
public static string IdFor <TModel, T>(this LoopItem <TModel, T> loopItem, Expression <Func <T, object> > expression)
{
return(TagGenerator.BuildRequestData(loopItem.Info.HtmlHelper.ViewContext, loopItem.Info.TranslateExpression(expression)).Id);
}