protected void lnkbtn10_Click(object sender, EventArgs e)
{
DataPager1.PageSize = 10;
lnkbtn10.CssClass = "currentpagesize";
lnkbtn20.CssClass = "";
lnkbtn30.CssClass = "";
}
protected void lnkbtn20_Click(object sender, EventArgs e)
{
DataPager1.PageSize = 20;
lnkbtn20.CssClass = "currentpagesize";
lnkbtn10.CssClass = "";
lnkbtn30.CssClass = "";
}
protected void lnkbtn30_Click(object sender, EventArgs e)
{
DataPager1.PageSize = 30;
lnkbtn30.CssClass = "currentpagesize";
lnkbtn10.CssClass = "";
lnkbtn20.CssClass = "";
}
二、自定义GridView
复制代码 代码如下:
using System;
using System.Collections;
using System.Web.UI.WebControls;
namespace WYJ.Web.Controls
{
/// <summary>
/// DataPagerGridView is a custom control that implements GrieView and IPageableItemContainer
/// </summary>
public class DataPagerGridView : GridView, IPageableItemContainer
{
public DataPagerGridView()
: base()
{
PagerSettings.Visible = false;
}
/// <summary>
/// TotalRowCountAvailable event key
/// </summary>
private static readonly object EventTotalRowCountAvailable = new object();
/// <summary>
/// Call base control's CreateChildControls method and determine the number of rows in the source
/// then fire off the event with the derived data and then we return the original result.
/// </summary>
/// <param></param>
/// <param></param>
/// <returns></returns>
protected override int CreateChildControls(IEnumerable dataSource, bool dataBinding)
{
int rows = base.CreateChildControls(dataSource, dataBinding);
// if the paging feature is enabled, determine the total number of rows in the datasource
if (this.AllowPaging)
{
// if we are databinding, use the number of rows that were created, otherwise cast the datasource to an Collection and use that as the count
int totalRowCount = dataBinding ? rows : ((ICollection)dataSource).Count;
// raise the row count available event
IPageableItemContainer pageableItemContainer = this as IPageableItemContainer;
this.OnTotalRowCountAvailable(new PageEventArgs(pageableItemContainer.StartRowIndex, pageableItemContainer.MaximumRows, totalRowCount));
// make sure the top and bottom pager rows are not visible
if (this.TopPagerRow != null)
this.TopPagerRow.Visible = false;
if (this.BottomPagerRow != null)
this.BottomPagerRow.Visible = false;
}
return rows;
}
/// <summary>
/// Set the control with appropriate parameters and bind to right chunk of data.
/// </summary>
/// <param></param>
/// <param></param>
/// <param></param>
void IPageableItemContainer.SetPageProperties(int startRowIndex, int maximumRows, bool databind)
{
int newPageIndex = (startRowIndex / maximumRows);
this.PageSize = maximumRows;
if (this.PageIndex != newPageIndex)
{
bool isCanceled = false;
if (databind)
{
// create the event arguments and raise the event
GridViewPageEventArgs args = new GridViewPageEventArgs(newPageIndex);
this.OnPageIndexChanging(args);
isCanceled = args.Cancel;
newPageIndex = args.NewPageIndex;
}
// if the event wasn't cancelled change the paging values
if (!isCanceled)
{
this.PageIndex = newPageIndex;
if (databind)
this.OnPageIndexChanged(EventArgs.Empty);
}
if (databind)
this.RequiresDataBinding = true;
}
}
/// <summary>
/// IPageableItemContainer's StartRowIndex = PageSize * PageIndex properties
/// </summary>
int IPageableItemContainer.StartRowIndex
{
get { return this.PageSize * this.PageIndex; }
}
/// <summary>
/// IPageableItemContainer's MaximumRows = PageSize property
/// </summary>
int IPageableItemContainer.MaximumRows
{
get { return this.PageSize; }
}
/// <summary>
///
/// </summary>
event EventHandler<PageEventArgs> IPageableItemContainer.TotalRowCountAvailable
{
add { base.Events.AddHandler(DataPagerGridView.EventTotalRowCountAvailable, value); }
remove { base.Events.RemoveHandler(DataPagerGridView.EventTotalRowCountAvailable, value); }
}
/// <summary>
///
/// </summary>
/// <param></param>
protected virtual void OnTotalRowCountAvailable(PageEventArgs e)
{
EventHandler<PageEventArgs> handler = (EventHandler<PageEventArgs>)base.Events[DataPagerGridView.EventTotalRowCountAvailable];
if (handler != null)
{
handler(this, e);
}
}
}
}
用法与Repeater类似，不多发了～
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