/// <summary>建立子控件</summary>
protected override void CreateChildControls()
{
// 当且仅当总记录数TotalRowCount准备好之后才创建子控件
if (TotalRowCount <= 0)
{
return;
}
Controls.Clear();
IPagedDataSource pagedDataSource = this;
PagerSettings pagerSettings = PagerSettings;
if (PagerTemplate != null)
{
// 分页模版输出
DataPagerItem item = new DataPagerItem();
PagerTemplate.InstantiateIn(item);
Controls.Add(item);
// 必须在加入Controls后再绑定，否则会因为没有关联Page而失败
// 每次完成创建子控件后马上绑定
item.DataItem = this;
item.DataBind();
item.DataItem = null;
}
else
{
// 分页控件输出
Table child = new Table();
TableRow row2 = new TableRow();
switch (pagerSettings.Mode)
{
case PagerButtons.NextPrevious:
CreateNextPrevPager(row2, pagedDataSource, false);
break;
case PagerButtons.Numeric:
CreateNumericPager(row2, pagedDataSource, false);
break;
case PagerButtons.NextPreviousFirstLast:
CreateNextPrevPager(row2, pagedDataSource, true);
break;
case PagerButtons.NumericFirstLast:
CreateNumericPager(row2, pagedDataSource, true);
break;
}
child.Rows.Add(row2);
Controls.Add(child);
}
}
private void CreatePager(RepeaterItem Pagination, int PagerIndex)
{
if (PagerTemplate != null)
{
PagerTemplate.InstantiateIn(Pagination);
}
else if (this.PageCount > 1)
{
Control pagerRoot = Pagination;
if (!string.IsNullOrEmpty(PagerSettings.FirstPagerContainer) && PagerIndex == 0)
{
if (!PagerSettings.UseQueryString)
{
throw (new HttpException("QueryString pagination is required to create pager controls"));
}
pagerRoot = GetReferencedControl(PagerSettings.FirstPagerContainer);
}
else if (!string.IsNullOrEmpty(PagerSettings.SecondPagerContainer) && PagerIndex > 0)
{
if (!PagerSettings.UseQueryString)
{
throw (new HttpException("QueryString pagination is required to create pager controls"));
}
pagerRoot = GetReferencedControl(PagerSettings.SecondPagerContainer);
}
if (!string.IsNullOrEmpty(PagerSettings.ContainerCssClass))
{
System.Web.UI.HtmlControls.HtmlGenericControl div = new System.Web.UI.HtmlControls.HtmlGenericControl("div");
div.Attributes["class"] = PagerSettings.ContainerCssClass;
pagerRoot.Controls.Add(div);
pagerRoot = div;
}
switch (this.PagerSettings.Mode)
{
case PagerButtons.Numeric:
CreateNumericPager(pagerRoot);
break;
case PagerButtons.NumericFirstLast:
CreateNumericPager(pagerRoot);
if (this.PageIndex > 0)
{
pagerRoot.Controls.AddAt(0, CreateSeparator());
pagerRoot.Controls.AddAt(0, CreateFirstButton());
}
if (this.PageIndex < (this.PageCount - 1))
{
pagerRoot.Controls.Add(CreateSeparator());
pagerRoot.Controls.Add(CreateLastButton());
}
break;
case PagerButtons.NumericNextPrevious:
CreateNumericPager(pagerRoot);
if (this.PageIndex > 0)
{
pagerRoot.Controls.AddAt(0, CreateSeparator());
pagerRoot.Controls.AddAt(0, CreatePreviousButton());
}
if (this.PageIndex < (this.PageCount - 1))
{
if (pagerRoot.Controls.Count > 0)
{
pagerRoot.Controls.Add(CreateSeparator());
}
pagerRoot.Controls.Add(CreateNextButton());
}
break;
case PagerButtons.NextPrevious:
if (this.PageIndex > 0)
{
pagerRoot.Controls.Add(CreatePreviousButton());
}
if (this.PageIndex < (this.PageCount - 1))
{
if (pagerRoot.Controls.Count > 0)
{
pagerRoot.Controls.Add(CreateSeparator());
}
pagerRoot.Controls.Add(CreateNextButton());
}
break;
case PagerButtons.NextPreviousFirstLast:
if (this.PageIndex > 0)
{
pagerRoot.Controls.Add(CreateFirstButton());
pagerRoot.Controls.Add(CreateSeparator());
pagerRoot.Controls.Add(CreatePreviousButton());
}
if (this.PageIndex < (this.PageCount - 1))
{
if (pagerRoot.Controls.Count > 0)
{
pagerRoot.Controls.Add(CreateSeparator());
}
pagerRoot.Controls.Add(CreateNextButton());
pagerRoot.Controls.Add(CreateSeparator());
pagerRoot.Controls.Add(CreateLastButton());
}
break;
case PagerButtons.NumericNextPreviousFirstLast:
CreateNumericPager(pagerRoot);
if (this.PageIndex > 0)
{
pagerRoot.Controls.AddAt(0, CreateSeparator());
pagerRoot.Controls.AddAt(0, CreatePreviousButton());
pagerRoot.Controls.AddAt(0, CreateSeparator());
pagerRoot.Controls.AddAt(0, CreateFirstButton());
}
if (this.PageIndex < (this.PageCount - 1))
{
pagerRoot.Controls.Add(CreateSeparator());
pagerRoot.Controls.Add(CreateNextButton());
pagerRoot.Controls.Add(CreateSeparator());
pagerRoot.Controls.Add(CreateLastButton());
}
break;
}
}
}
