ASP.NET实现增删改查等功能(Access版)系统之三-分页及排序
/// <summary>
/// 分页技术,触发事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void gridViewPublishers_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.DataSource = SortDataTable(GridView1.DataSource as DataTable, true);
GridView1.PageIndex = e.NewPageIndex;
GridView1.DataBind();
}
/// <summary>
/// 分页实现
/// </summary>
/// <param name="dataTable"></param>
/// <param name="isPageIndexChanging"></param>
/// <returns></returns>
protected DataView SortDataTable(DataTable dataTable, bool isPageIndexChanging)
{
if (dataTable != null)
{
DataView dataView = new DataView(dataTable);
if (GridViewSortExpression != string.Empty)
{
if (isPageIndexChanging)
{
dataView.Sort = string.Format("{0} {1}", GridViewSortExpression, GridViewSortDirection);
}
else
{
dataView.Sort = string.Format("{0} {1}", GridViewSortExpression, GetSortDirection());
}
}
return dataView;
}
else
{
return new DataView();
}
}
private string GridViewSortExpression
{
get { return ViewState["SortExpression"] as string ?? string.Empty; }
set { ViewState["SortExpression"] = value; }
}
private string GridViewSortDirection
{
get { return ViewState["SortDirection"] as string ?? "ASC"; }
set { ViewState["SortDirection"] = value; }
}
private string GetSortDirection()
{
switch (GridViewSortDirection)
{
case "ASC":
GridViewSortDirection = "DESC";
break;
case "DESC":
GridViewSortDirection = "ASC";
break;
}
return GridViewSortDirection;
}
protected void gridViewPublishers_Sorting(object sender, GridViewSortEventArgs e)
{
GridViewSortExpression = e.SortExpression;
int pageIndex = GridView1.PageIndex;
GridView1.DataSource = SortDataTable(GridView1.DataSource as DataTable, false);
GridView1.DataBind();
GridView1.PageIndex = pageIndex;
}