protected async override Task <string> ProviderJson()
{
if (Layouts == null)
{
Init(httpContext.RequestServices);
}
var dic = new Dictionary <string, string>();
foreach (var item in Layouts)
{
dic.Add(item.ProviderFieldName, await item.ProviderField());
}
var json = JObjectHelper.CreateSimpleJson(dic).Replace(Environment.NewLine, string.Empty);
return(json);
}