}
}
@code {
private IStringLocalizer Localizer;
private int _pages = 0;
private int _page = 1;
private int _maxItems = 10;
private int _displayPages = 5;
private int _startPage = 0;
private int _endPage = 0;
private int _columns = 0;
[Parameter]
public string Format { get; set; } // Table or Grid
[Parameter]
public string Toolbar { get; set; } // Top, Bottom or Both
[Parameter]
public RenderFragment Header { get; set; } = null; // only applicable to Table layouts
[Parameter]
public RenderFragment Row { get; set; } = null; // required
[Parameter]
public RenderFragment Footer { get; set; } = null; // only applicable to Table layouts
[Parameter]
public RenderFragment Detail { get; set; } = null; // only applicable to Table layouts
[Parameter]
public IEnumerable Items { get; set; } // the IEnumerable data source
[Parameter]
public string PageSize { get; set; } // number of items to display on a page
[Parameter]
public string Columns { get; set; } // only applicable to Grid layouts - default is zero indicating use responsive behavior
[Parameter]
public string CurrentPage { get; set; } // sets the initial page to display
[Parameter]
public string DisplayPages { get; set; } // maximum number of page numbers to display for user selection
[Parameter]
public string Class { get; set; } // class for the containing element - ie.
for Table or
for Grid
[Parameter]
public string RowClass { get; set; } // class for row element - ie.
for Table or
for Grid
[Parameter]
public string ColumnClass { get; set; } // class for column element - only applicable to Grid format
[Parameter]
public Action OnPageChange { get; set; } // a method to be executed in the calling component when the page changes
private IEnumerable ItemList { get; set; }
protected override void OnInitialized()
{
Localizer = LocalizerFactory.Create(GetType().FullName);
}
protected override void OnParametersSet()
{
if (string.IsNullOrEmpty(Format))
{
Format = "Table";
}
if (string.IsNullOrEmpty(Toolbar))
{
Toolbar = "Top";
}
if (string.IsNullOrEmpty(Class))
{
if (Format == "Table")
{
Class = "table table-borderless";
}
else
{
Class = "container-fluid";
}
}
if (string.IsNullOrEmpty(RowClass))
{
if (Format == "Table")
{
RowClass = "";
}
else
{
RowClass = "row";
}
}
if (string.IsNullOrEmpty(ColumnClass))
{
if (Format == "Table")
{
ColumnClass = "";
}
else
{
ColumnClass = "col";
}
}
if (!string.IsNullOrEmpty(PageSize))
{
_maxItems = int.Parse(PageSize);
}
if (!string.IsNullOrEmpty(Columns))
{
_columns = int.Parse(Columns);
}
if (!string.IsNullOrEmpty(DisplayPages))
{
_displayPages = int.Parse(DisplayPages);
}
if (!string.IsNullOrEmpty(CurrentPage))
{
_page = int.Parse(CurrentPage);
}
else
{
_page = 1;
}
if (_page < 1) _page = 1;
_startPage = 0;
_endPage = 0;
if (Items != null)
{
_pages = (int)Math.Ceiling(Items.Count() / (decimal)_maxItems);
if (_page > _pages)
{
_page = _pages;
}
ItemList = Items.Skip((_page - 1) * _maxItems).Take(_maxItems);
SetPagerSize();
}
}
public void SetPagerSize()
{
_startPage = ((_page - 1) / _displayPages) * _displayPages + 1;
_endPage = _startPage + _displayPages - 1;
if (_endPage > _pages)
{
_endPage = _pages;
}
OnPageChange?.Invoke(_page);
StateHasChanged();
}
public void UpdateList(int page)
{
ItemList = Items.Skip((page - 1) * _maxItems).Take(_maxItems);
_page = page;
SetPagerSize();
}
public void SkipPages(string direction)
{
switch (direction)
{
case "forward":
_page = _endPage + 1;
break;
case "back":
_page = _startPage - 1;
break;
}
SetPagerSize();
}
public void NavigateToPage(string direction)
{
switch (direction)
{
case "next":
if (_page < _pages)
{
_page += 1;
}
break;
case "previous":
if (_page > 1)
{
_page -= 1;
}
break;
}
UpdateList(_page);
}
}