private Dictionary <string, string> GetSortQueryParams(SortParams sortParams)
{
if (sortParams.IsNotNull())
{
return(new Dictionary <string, string>
{
{ nameof(SortParams.ColumnNo), $"{ sortParams.ColumnNo}" },
{ nameof(SortParams.Direction), $"{ sortParams.ColumnNo}" },
});
}
return(new Dictionary <string, string>());
}
private void BuildUrl(long total, PaginationParams paginationParams, SortParams sortParams, IEnumerable <TData> data)
{
Uri baseUri = new Uri(paginationParams.Host);
Uri uri = new Uri(baseUri, paginationParams.Path);
var lastPage = (int)Math.Ceiling(total / (decimal)paginationParams.PerPage);
if (paginationParams.Page + 1 <= lastPage)
{
var queryNext = GetSortQueryParams(sortParams);
NextPageUrl = QueryHelpers.AddQueryString(uri.ToString(), queryNext);
}
if (paginationParams.Page - 1 >= 1)
{
var queryPrevious = GetSortQueryParams(sortParams);
PreviousPageUrl = QueryHelpers.AddQueryString(uri.ToString(), queryPrevious);
}
}
public Task BindModelAsync(ModelBindingContext bindingContext)
{
StringValues sorting;
bindingContext.HttpContext.Request.Query.TryGetValue("sort", out sorting);
int? l_columnNo = null;
SortDirection?e_direction = null;
if (sorting.Count > 0)
{
var split = sorting[0].Split('|');
l_columnNo = split.ElementAtOrDefault(1) != null ? split[0].ToN <int>() : null;
e_direction = split.ElementAtOrDefault(1) != null ? split[1].ToEnum <SortDirection>() : null;
}
var result = new SortParams()
{
ColumnNo = l_columnNo ?? 0,
Direction = e_direction ?? SortDirection.DESC
};
var validationResult = new SortParamsValidator().Validate(result);
if (validationResult.IsValid)
{
bindingContext.Result = ModelBindingResult.Success(result);
}
else
{
bindingContext.Result = ModelBindingResult.Failed();
throw new ValidationException(validationResult.Errors);
}
return(Task.CompletedTask);
}
public PaginatedResults(long total, PaginationParams paginationParams, SortParams sortParams, IEnumerable <TData> data)
{
BuildUrl(total, paginationParams, sortParams, data);
CalculateProperties(total, paginationParams);
Data = data.ToList();
}