/// <summary>
/// Renders the filter item.
/// </summary>
public async Task <IViewComponentResult> InvokeAsync(string url, ListRequestVM request, string propName, string title)
{
if (request == null || propName == null || title == null)
{
throw new ArgumentNullException();
}
var prop = request.GetType().GetProperty(propName);
if (prop == null)
{
throw new ArgumentException($"Request of type '{request.GetType().Name}' does not have a property '{propName}'.");
}
var cloneRequest = ListRequestVM.Clone(request);
prop.SetValue(cloneRequest, prop.PropertyType.IsValueType ? Activator.CreateInstance(prop.PropertyType) : null);
var vm = new ListItemFilterVM
{
Title = title,
CancelUrl = ListRequestHelper.GetUrl(url, cloneRequest)
};
return(View("~/Areas/Admin/Views/Components/ListItemFilter.cshtml", vm));
}
/// <summary>
/// Gets all arbitrary values for the request.
/// </summary>
public static IEnumerable <KeyValuePair <string, string> > GetValues(ListRequestVM vm)
{
var dict = new List <KeyValuePair <string, string> >();
if (vm == null)
{
return(dict);
}
var props = vm.GetType().GetProperties();
foreach (var prop in props)
{
var propType = prop.PropertyType;
var value = prop.GetValue(vm);
if (value == null)
{
continue;
}
var defValue = propType.IsValueType && Nullable.GetUnderlyingType(propType) == null
? Activator.CreateInstance(propType)
: null;
if (value.Equals(defValue))
{
continue;
}
var isEnumerable = propType.IsArray ||
(propType != typeof(string) && propType.GetInterfaces().Contains(typeof(IEnumerable)));
if (isEnumerable)
{
foreach (object elem in (dynamic)value)
{
Add(prop.Name, elem);
}
}
else
{
Add(prop.Name, value);
}
}
return(dict);
void Add(string propName, object value)
{
var str = value is IConvertible fmt
? fmt.ToInvariantString()
: value.ToString();
dict.Add(new KeyValuePair <string, string>(propName, str));
}
}
/// <summary>
/// Renders the result.
/// </summary>
public async Task <IViewComponentResult> InvokeAsync(ListRequestVM request, string propName)
{
if (request == null || propName == null)
{
throw new ArgumentNullException();
}
var prop = request.GetType().GetProperty(propName);
if (prop == null)
{
throw new ArgumentException($"Request of type '{request.GetType().Name}' does not have a property '{propName}'.");
}
if (!prop.PropertyType.IsArray)
{
throw new ArgumentException($"Property {request.GetType().Name}.{propName} must be an array.");
}
var elemType = prop.PropertyType.GetElementType();
if (!elemType.IsEnum)
{
throw new ArgumentException($"Type '{prop.PropertyType.Name}' is not an enum.");
}
var enumValues = GetEnumValues(elemType);
var selected = prop.GetValue(request) as int[];
var result = new List <ListEnumFilterItemVM>();
foreach (var enumValue in enumValues)
{
result.Add(new ListEnumFilterItemVM
{
PropertyName = propName,
Title = enumValue.Value,
Value = enumValue.Key.ToInvariantString(),
IsActive = selected?.Any(x => x == enumValue.Key) == true
});
}
return(View("~/Areas/Admin/Views/Components/ListEnumFilter.cshtml", result));
}