asp.net中让Repeater和GridView支持DataPager分页

using System.Web.UI;
using System.Web.UI.WebControls;
namespace WYJ.Web.Controls
{
/// <summary>
/// Repeater with support for DataPager
/// </summary>
[ToolboxData("<{0}:DataPagerRepeater runat=server PersistentDataSource=true></{0}:DataPagerRepeater>")]
public class DataPagerRepeater : Repeater, System.Web.UI.WebControls.IPageableItemContainer, INamingContainer
{
/// <summary>
/// Number of rows to show
/// </summary>
public int MaximumRows { get { return ViewState["MaximumRows"] != null ? (int)ViewState["MaximumRows"] : -1; } }
/// <summary>
/// First row to show
/// </summary>
public int StartRowIndex { get { return ViewState["StartRowIndex"] != null ? (int)ViewState["StartRowIndex"] : -1; } }
/// <summary>
/// Total rows. When PagingInDataSource is set to true you must get the total records from the datasource (without paging) at the FetchingData event
/// When PagingInDataSource is set to true you also need to set this when you load the data the first time.
/// </summary>
public int TotalRows { get { return ViewState["TotalRows"] != null ? (int)ViewState["TotalRows"] : -1; } set { ViewState["TotalRows"] = value; } }
/// <summary>
/// If repeater should store data source in view state. If false you need to get and bind data at post back. When using a connected data source this is handled by the data source.
/// </summary>
public bool PersistentDataSource
{
get { return ViewState["PersistentDataSource"] != null ? (bool)ViewState["PersistentDataSource"] : true; }
set { ViewState["PersistentDataSource"] = value; }
}
/// <summary>
/// Set to true if you want to handle paging in the data source.
/// Ex if you are selecting data from the database and only select the current rows
/// you must set this property to true and get and rebind data at the FetchingData event.
/// If this is true you must also set the TotalRecords property at the FetchingData event.
/// </summary>
/// <seealso cref="FetchingData"/>
/// <seealso cref="TotalRows"/>
public bool PagingInDataSource
{
get { return ViewState["PageingInDataSource"] != null ? (bool)ViewState["PageingInDataSource"] : false; }
set { ViewState["PageingInDataSource"] = value; }
}
/// <summary>
/// Checks if you need to rebind data source at postback
/// </summary>
public bool NeedsDataSource
{
get
{
if (PagingInDataSource)
return true;
if (IsBoundUsingDataSourceID == false && !Page.IsPostBack)
return true;
if (IsBoundUsingDataSourceID == false && PersistentDataSource == false && Page.IsPostBack)
return true;
else
return false;
}
}
/// <summary>
/// Loading ViewState
/// </summary>
/// <param name="savedState"></param>
protected override void LoadViewState(object savedState)
{
base.LoadViewState(savedState);
//if (Page.IsPostBack)
//{
// if (!IsBoundUsingDataSourceID && PersistentDataSource && ViewState["DataSource"] != null)
// {
// this.DataSource = ViewState["DataSource"];
// this.DataBind(true);
// }
// if (IsBoundUsingDataSourceID)
// {
// this.DataBind();
// }
/