oqtane.framework/Oqtane.Client/Modules/Controls/Pager.razor

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@namespace Oqtane.Modules.Controls
@inherits ModuleControlBase
@typeparam TableItem
@if (ItemList != null)
{
@if ((Toolbar == "Top" || Toolbar == "Both") && _pages > 0 && Items.Count() > _maxItems)
{
<ul class="pagination justify-content-center my-2">
<li class="page-item@((_page > 1) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => UpdateList(1))><span class="oi oi-media-step-backward" title="start" aria-hidden="true"></span></a>
</li>
@if (_pages > _displayPages && _displayPages > 1)
{
<li class="page-item@((_page > _displayPages) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => SkipPages("back"))><span class="oi oi-media-skip-backward" title="skip back" aria-hidden="true"></span></a>
</li>
}
<li class="page-item@((_page > 1) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => NavigateToPage("previous"))><span class="oi oi-chevron-left" title="previous" aria-hidden="true"></span></a>
</li>
@for (int i = _startPage; i <= _endPage; i++)
{
var pager = i;
if (pager == _page)
{
<li class="page-item active">
<a class="page-link" @onclick=@(async () => UpdateList(pager))>@pager</a>
</li>
}
else
{
<li class="page-item">
<a class="page-link" @onclick=@(async () => UpdateList(pager))>@pager</a>
</li>
}
}
<li class="page-item@((_page < _pages) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => NavigateToPage("next"))><span class="oi oi-chevron-right" title="next" aria-hidden="true"></span></a>
</li>
@if (_pages > _displayPages && _displayPages > 1)
{
<li class="page-item@((_endPage < _pages) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => SkipPages("forward"))><span class="oi oi-media-skip-forward" title="skip forward" aria-hidden="true"></span></a>
</li>
}
<li class="page-item@((_page < _pages) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => UpdateList(_pages))><span class="oi oi-media-step-forward" title="end" aria-hidden="true"></span></a>
</li>
<li class="page-item disabled">
<a class="page-link" style="white-space: nowrap;">Page @_page of @_pages</a>
</li>
</ul>
}
@if (Format == "Table" && Row != null)
{
<div class="table-responsive">
<table class="@Class">
<thead>
<tr>@Header</tr>
</thead>
<tbody>
@foreach (var item in ItemList)
{
<tr>@Row(item)</tr>
@if (Detail != null)
{
<tr>@Detail(item)</tr>
}
}
</tbody>
</table>
</div>
}
@if (Format == "Grid" && Row != null)
{
int count = 0;
if (ItemList != null)
{
count = (int)Math.Ceiling(ItemList.Count() / (decimal)_columns) * _columns;
}
<div class="@Class">
@if (Header != null)
{
<div class="row"><div class="col">@Header</div></div>
}
@for (int row = 0; row < (count / _columns); row++)
{
<div class="row">
@for (int col = 0; col < _columns; col++)
{
int index = (row * _columns) + col;
if (index < ItemList.Count())
{
<div class="col">@Row(ItemList.ElementAt(index))</div>
}
else
{
<div class="col">&nbsp;</div>
}
}
</div>
}
</div>
}
@if ((Toolbar == "Bottom" || Toolbar == "Both") && _pages > 0 && Items.Count() > _maxItems)
{
<ul class="pagination justify-content-center my-2">
<li class="page-item@((_page > 1) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => UpdateList(1))><span class="oi oi-media-step-backward" title="start" aria-hidden="true"></span></a>
</li>
@if (_pages > _displayPages && _displayPages > 1)
{
<li class="page-item@((_page > _displayPages) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => SkipPages("back"))><span class="oi oi-media-skip-backward" title="skip back" aria-hidden="true"></span></a>
</li>
}
<li class="page-item@((_page > 1) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => NavigateToPage("previous"))><span class="oi oi-chevron-left" title="previous" aria-hidden="true"></span></a>
</li>
@for (int i = _startPage; i <= _endPage; i++)
{
var pager = i;
if (pager == _page)
{
<li class="page-item active">
<a class="page-link" @onclick=@(async () => UpdateList(pager))>@pager</a>
</li>
}
else
{
<li class="page-item">
<a class="page-link" @onclick=@(async () => UpdateList(pager))>@pager</a>
</li>
}
}
<li class="page-item@((_page < _pages) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => NavigateToPage("next"))><span class="oi oi-chevron-right" title="next" aria-hidden="true"></span></a>
</li>
@if (_pages > _displayPages && _displayPages > 1)
{
<li class="page-item@((_endPage < _pages) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => SkipPages("forward"))><span class="oi oi-media-skip-forward" title="skip forward" aria-hidden="true"></span></a>
</li>
}
<li class="page-item@((_page < _pages) ? "" : " disabled")">
<a class="page-link" @onclick=@(async () => UpdateList(_pages))><span class="oi oi-media-step-forward" title="end" aria-hidden="true"></span></a>
</li>
<li class="page-item disabled">
<a class="page-link" style="white-space: nowrap;">Page @_page of @_pages</a>
</li>
</ul>
}
}
@code {
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 = 1;
[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;
[Parameter]
public RenderFragment<TableItem> Row { get; set; } = null;
[Parameter]
public RenderFragment<TableItem> Detail { get; set; } = null; // only applicable to Table layouts
[Parameter]
public IEnumerable<TableItem> 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
[Parameter]
public string CurrentPage { get; set; } // optional property to set 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; }
[Parameter]
public Action<int> OnPageChange { get; set; } // optional - executes a method in the calling component when the page changes
private IEnumerable<TableItem> ItemList { get; set; }
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 px-0";
}
}
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;
}
_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);
}
}