private async Task OnPageSizeChanged(ChangeEventArgs args)
{
if (args.Value != null)
{
await PageSizeChanged.InvokeAsync(Convert.ToInt32(args.Value));
}
}
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
protected virtual void OnPageSizeChanged(EventArgs e)
{
if (PageSizeChanged != null)
{
PageSizeChanged.Invoke(this, e);
}
}
/// <summary>
/// 变更每页的呈现的数据，并触发 <see cref="PageSizeChanged"/> 事件。
/// </summary>
/// <param name="size">每页呈现的数据。</param>
public async Task ChangePageSize(int size)
{
await NavigateToFirst();
PageSize = size;
await PageSizeChanged.InvokeAsync(size);
}
/// <summary>
/// Sets the current page size to the specified value asynchronously.
/// </summary>
/// <param name="pageSize">The size of the page to set.</param>
/// <returns>A task for this function.</returns>
protected virtual async Task SetPageSize(int pageSize)
{
if (pageSize < 1)
{
return;
}
if (pageSize != PageSize)
{
PageSize = pageSize;
await PageSizeChanged.InvokeAsync(PageSize);
}
}
private void cmbPageSize_SelectedIndexChanged(object sender, EventArgs e)
{
int p;
if (!int.TryParse(cmbPageSize.Text, out p))
{
return;
}
PageSize = p;
PageSizeChanged.Raise(this);
}
/// <summary>
/// 切换每页行数
/// </summary>
private void PageRowsChanged()
{
var handel = FocusedRowHandle;
var change = _PageSize < _Rows - _PageSize * _Current;
_PageSize = int.Parse(cbeRows.Text);
PageSizeChanged?.Invoke(this, new PageSizeEventArgs(_PageSize));
var page = _Current;
Refresh();
change = change || _PageSize < _Rows - _PageSize * _Current;
if (!change && _Current == page && FocusedRowHandle == handel)
{
return;
}
// 切换了页码或当前页显示行数变化后需要重新加载数据
CurrentPageChanged?.Invoke(this, new PageControlEventArgs(FocusedRowHandle));
}
/// <summary>
/// Called when page size changed.
/// </summary>
/// <param name="value">The value.</param>
protected async Task OnPageSizeChanged(object value)
{
bool isFirstPage = CurrentPage == 0;
bool isLastPage = CurrentPage == numberOfPages - 1;
int prevSkip = skip;
PageSize = (int)value;
await InvokeAsync(Reload);
await PageSizeChanged.InvokeAsync((int)value);
if (isLastPage)
{
await LastPage();
}
else if (!isFirstPage)
{
int newPage = (int)Math.Floor((decimal)(prevSkip / (PageSize > 0 ? PageSize : 10)));
await GoToPage(newPage, true);
}
}
private void HandlePageSizeChange(PaginationEventArgs args)
{
PageSizeChanged.InvokeAsync(args.PageSize);
OnPageSizeChange.InvokeAsync(args);
}
public async Task PagerSize_OnChange(int pageSize)
{
PagingData.PageSize = pageSize;
await PageSizeChanged.InvokeAsync(null);
}
protected void OnPageSizeChanged()
{
PageSizeChanged?.Invoke(this, EventArgs.Empty);
}
protected void PagerPageSizeChanged(int value)
{
PageSizeChanged?.Invoke(value);
}
