/// <summary>
/// Converts IEnumerable to a Page
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="source"></param>
/// <param name="pageIndex">Index of page</param>
/// <param name="pageSize">Size of page</param>
/// <param name="itemCount">Total item count of IEnumerable</param>
/// <param name="prePaged">Is the IEnumerable already prepaged. If so the IEnumerable will not be paged anymore.</param>
/// <returns></returns>
public static Page <T> ToPage <T>(this IEnumerable <T> source, int pageIndex, int pageSize, int itemCount, bool prePaged = false)
{
Validator.Validate(pageIndex, pageSize);
var pd = new PageDefinition(pageIndex, pageSize, itemCount);
return(prePaged || pd.ItemCount < 1
? Page <T> .FromEnumerable(source, pd)
: Page <T> .FromEnumerable(source.Skip(pd.SkipIndex).Take(pd.PageSize), pd));
}
/// <summary>
/// Converts IEnumerable to a Page
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="source"></param>
/// <param name="pagerFilter"><see cref="IPagerFilter"/></param>
/// <returns></returns>
public static Page <T> ToPage <T>(this IEnumerable <T> source, IPagerFilter pagerFilter)
{
Validator.Validate(pagerFilter);
var pd = new PageDefinition(pagerFilter, source.Count());
return(pd.ItemCount < 1
? Page <T> .FromEnumerable(source, pd)
: Page <T> .FromEnumerable(source.Skip(pd.SkipIndex).Take(pd.PageSize), pd));
}
/// <summary>
/// Converts asynchronous IEnumerable to a Page
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="source"></param>
/// <param name="pagerFilter"><see cref="IPagerFilter"/></param>
/// <param name="itemCount">Total item count of IEnumerable</param>
/// <param name="prePaged">Is the IEnumerable already prepaged. If so the IEnumerable will not be paged anymore.</param>
/// <returns></returns>
public static async Task <Page <T> > ToPageAsync <T>(this IEnumerable <T> source, IPagerFilter pagerFilter, int itemCount, bool prePaged = false)
{
Validator.Validate(pagerFilter);
var pd = new PageDefinition(pagerFilter, itemCount);
return(prePaged || pd.ItemCount < 1
? await Task.Run(() => Page <T> .FromEnumerable(source, pd)).ConfigureAwait(false)
: await Task.Run(() => Page <T> .FromEnumerable(source.Skip(pd.SkipIndex).Take(pd.PageSize), pd)).ConfigureAwait(false));
}
/// <summary>
/// Converts asynchronous IEnumerable to a Page
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="source"></param>
/// <param name="pageIndex">Index of page</param>
/// <param name="pageSize">Size of page</param>
/// <returns></returns>
public static async Task <Page <T> > ToPageAsync <T>(this IEnumerable <T> source, int pageIndex, int pageSize)
{
Validator.Validate(pageIndex, pageSize);
var pd = new PageDefinition(pageIndex, pageSize, source.Count());
return(pd.ItemCount < 1
? await Task.Run(() => Page <T> .FromEnumerable(source, pd)).ConfigureAwait(false)
: await Task.Run(() => Page <T> .FromEnumerable(source.Skip(pd.SkipIndex).Take(pd.PageSize), pd)).ConfigureAwait(false));
}
/// <summary>
/// Converts IQueryable to a Page
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="source"></param>
/// <param name="pageIndex">Index of page</param>
/// <param name="pageSize">Size of page</param>
/// <returns></returns>
public static Page <T> ToPage <T>(this IQueryable <T> source, int pageIndex, int pageSize)
{
Validator.Validate(pageIndex, pageSize);
var pd = new PageDefinition(pageIndex, pageSize, source.Count());
return(pd.ItemCount < 1
? Page <T> .FromEnumerable(source, pd)
: Page <T> .FromEnumerable(source.Skip(pd.SkipIndex).Take(pd.PageSize), pd));
}
/// <summary>
/// Converts a collection to a specific Page
/// </summary>
/// <param name="source">the elements of the current page</param>
/// <param name="definitions">the definition of the current page and its position in the original list</param>
internal Page(IEnumerable <T> source, PageDefinition definitions)
{
if (source != null && definitions.ItemCount > 0)
{
var arrSource = source.ToArray();
_list = arrSource.Any()
? new List <T>(arrSource)
: new List <T>();
}
else
{
_list = new List <T>();
}
CurrentPageIndex = definitions.PageIndex;
TotalPageCount = definitions.PageCount;
PageSize = definitions.PageSize;
TotalItemCount = definitions.ItemCount;
}
/// <summary>
/// Converts a collection to a specific Page
/// </summary>
/// <param name="source">the elements of the current page</param>
/// <param name="definitions">the definition of the current page and its position in the original list</param>
internal static Page <T> FromEnumerable(IEnumerable <T> source, PageDefinition definitions)
{
var page = new Page <T>();
if (source != null && definitions.ItemCount > 0)
{
var arrSource = source.ToArray();
page._list = arrSource.Any()
? new List <T>(arrSource)
: new List <T>();
}
else
{
page._list = new List <T>();
}
page.CurrentPageIndex = definitions.PageIndex;
page.TotalPageCount = definitions.PageCount;
page.PageSize = definitions.PageSize;
page.TotalItemCount = definitions.ItemCount;
return(page);
}
/// <summary>
/// Converts a collection to a specific Page
/// </summary>
/// <param name="source">the elements of the current page</param>
/// <param name="pageIndex">The currently selected page in the original list</param>
/// <param name="pageSize">Size of an individual page</param>
/// <param name="itemCount">Total item count in the original list</param>
public Page(IEnumerable <T> source, int pageIndex, int pageSize, int itemCount)
{
Validator.Validate(pageIndex, pageSize);
var definitions = new PageDefinition(pageIndex, pageSize, itemCount);
if (source != null && definitions.ItemCount > 0)
{
var arrSource = source.ToArray();
_list = arrSource.Any()
? new List <T>(arrSource)
: new List <T>();
}
else
{
_list = new List <T>();
}
CurrentPageIndex = definitions.PageIndex;
TotalPageCount = definitions.PageCount;
PageSize = definitions.PageSize;
TotalItemCount = definitions.ItemCount;
}
