波斯马BOSSMA Information Technology

GridView的本身支持分页，一般情况下我们可以通过如下几个步骤实现分页：

1、更改GrdView控件的AllowPaging属性为true；

2、更改GrdView控件的PageSize属性为一个数值（默认为10）；

3、更改GrdView控件的PageSetting属性；

4、为GridView添加事件：OnPageIndexChanging

大多数情况下通过上边的步骤就可以实现GridView的分页了，当然很多代码需要你自己来写。

但是有时候我们需要自定义分页模板，还希望能通过更统一以及更少的代码来实现这个分页功能。考虑到这些问题，我实现了一个通用的GridView分页模型，发布出来，仅供大家参考。

这个分页模型在使用自定义数据进行分页时是有问题的，即通过设置记录总数，每次只绑定当前分页数据到GridView的分页方式。我新写了一篇文章来解决这个问题，需要的朋友请阅读：GridView自定义分页的实现方式

点击这里下载示例程序 （例子是最近（20110927）写的，和文中有些出入，请以实际代码为准）

1、创建一个基础页面类

BasePage，继承System.Web.UI.Page

在这个基类中，创建几个通用的分页属性和方法，然后需要分页的页面都继承这个基类。

public class BasePage : System.Web.UI.Page
{
??? public BasePage()
??? {
??? }

??? #region 分页相关属性和方法
??? /// <summary>
??? /// 总的记录数，目前仅用于自定义记录数
??? /// </summary>
??? protected int GridView_RecordCount = 0;

??? /// <summary>
??? /// 使用自定义的记录数
??? /// 需要设置GridView_RecordCount
??? /// 如果一次性绑定全部数据，不需要使用自定义，GridView可以通过DataSource自己获取
??? /// </summary>
??? protected bool IsUseCustomRecordCount = false;

??? /// <summary>
??? /// 实现GridView数据绑定的虚方法
??? /// 在具体的页面类中重写这个方法，在PageTurn方法中就会调用重写的方法，以实现分页后的数据重新绑定
??? /// </summary>
??? protected virtual void GridView_DataBind()
??? {
??? }

??? /// <summary>
??? /// 分页页码跳转
??? /// </summary>
??? /// <param name="sender">跳转按钮</param>
??? /// <param name="e"></param>
??? protected void GridView_PageTurn(object sender, EventArgs e)
??? {
??????? System.Web.UI.WebControls.Button btnGoPage;
??????? System.Web.UI.WebControls.GridView GridView1;
??????? System.Web.UI.WebControls.TextBox txtGoPage;
??????? try
??????? {
??????????? btnGoPage = (System.Web.UI.WebControls.Button)sender;
??????????? GridView1 = (System.Web.UI.WebControls.GridView)btnGoPage.NamingContainer.Parent.Parent;
??????????? txtGoPage = (System.Web.UI.WebControls.TextBox)GridView1.BottomPagerRow.FindControl("txtGoPage");
??????? }
??????? catch
??????? {
??????????? MessageBox.Show(this.Page, "页码输入框和跳转按钮都必须在GridView的分页模板中！");
??????????? return;
??????? }

??????? int pageIndex = 1;
??????? bool goSuccess = false;

??????? if (!string.IsNullOrEmpty(txtGoPage.Text.Trim()))
??????? {
??????????? if (int.TryParse(txtGoPage.Text.Trim(), out pageIndex))
??????????? {
??????????????? pageIndex--;

??????????????? if (pageIndex >= 0 && pageIndex < GridView1.PageCount)
??????????????? {
??????????????????? goSuccess = true;

??????????????????? GridView1.PageIndex = pageIndex;
??????????????????? GridView_DataBind();
??????????????? }
??????????? }
??????? }

??????? if (!goSuccess)
??????? {
??????????? MessageBox.Show(this.Page, "无效的页码！");
??????????? return;
??????? }
??? }

??? /// <summary>
??? /// 页码改变时触发
??? /// </summary>
??? /// <param name="sender"></param>
??? /// <param name="e"></param>
??? protected void GridView_PageIndexChanging(object sender, System.Web.UI.WebControls.GridViewPageEventArgs e)
??? {
??????? System.Web.UI.WebControls.GridView GridView1 = sender as System.Web.UI.WebControls.GridView;

??????? GridView1.PageIndex = e.NewPageIndex;
??????? GridView_DataBind();
??? }

??? /// <summary>
??? /// GridView数据绑定完毕之后触发，显示记录数
??? /// </summary>
??? /// <param name="sender"></param>
??? /// <param name="e"></param>
??? protected void GridView_DataBound(object sender, EventArgs e)
??? {
??????? //获取当前GridView
??????? System.Web.UI.WebControls.GridView GridView1 = sender as System.Web.UI.WebControls.GridView;

??????? if (GridView1.BottomPagerRow == null)
??????? {
??????????? return;
??????? }

??????? //总是显示分页行
??????? GridView1.BottomPagerRow.Visible = true;

??????? System.Web.UI.WebControls.Label lblRecorCount = (System.Web.UI.WebControls.Label)GridView1.BottomPagerRow.FindControl("lblRecorCount");
??????? if (IsUseCustomRecordCount)
??????? {
??????????? lblRecorCount.Text = GridView_RecordCount.ToString();
??????? }
??????? else
??????? {
??????????? if (GridView1.DataSource == null)
??????????? {
??????????????? return;
??????????? }

??????????? //根据数据类型，动态获取绑定的数据源的记录数
??????????? if (GridView1.DataSource.GetType() == typeof(DataView))
??????????? {
??????????????? lblRecorCount.Text = ((DataView)GridView1.DataSource).Count.ToString();
??????????? }
??????????? else if (GridView1.DataSource.GetType() == typeof(DataTable))
??????????? {
??????????????? lblRecorCount.Text = ((DataTable)GridView1.DataSource).Rows.Count.ToString();
??????????? }
??????????? else if (GridView1.DataSource.GetType() == typeof(DataSet))
??????????? {
??????????????? lblRecorCount.Text = ((DataSet)GridView1.DataSource).Tables[0].Rows.Count.ToString();
??????????? }
??????????? else if (GridView1.DataSource is Array)
??????????? {
??????????????? lblRecorCount.Text = ((Array)GridView1.DataSource).Length.ToString();
??????????? }
??????????? else if (GridView1.DataSource.GetType() is System.Collections.IList)
??????????? {
??????????????? lblRecorCount.Text = ((System.Collections.IList)GridView1.DataSource).Count.ToString();
??????????? }
??????????? else if (GridView1.DataSource.GetType() is System.Collections.ICollection)
??????????? {
??????????????? lblRecorCount.Text = ((System.Collections.ICollection)GridView1.DataSource).Count.ToString();
??????????? }
??????????? else
??????????? {
??????????????? OALog.Write("绑定到GridView的数据类型未知：" + GridView1.DataSource.GetType());
??????????? }
??????? }
??? }
??? #endregion
}

?

2、页面cs文件继承基类：BasePage

public partial class NewsList: BasePage

?

3、在页面添加一个GridView并设置相关属性

?<asp:GridView ID="GridView1" BorderStyle="Solid" BorderWidth="1px" BorderColor="#73B7EA"
??????????????????? Width="100%" runat="server" AutoGenerateColumns="False" HorizontalAlign="Center"
??????????????????? BackColor="White" CellPadding="4" GridLines="None"?? OnPageIndexChanging="GridView_PageIndexChanging" PageSize="10"
??????????????????? AllowPaging="true" OnDataBound="GridView_DataBound">

<Columns>...</Columns>

?<PagerTemplate>
??????????????????????? <div style="text-align: center;"><span style="color: Blue">
??????????????????????????? 共有<asp:label id="lblRecorCount" runat="server"></asp:label>条记录&nbsp;
??????????????????????????? 第<asp:Label ID="lblcurPage" ForeColor="Blue" runat="server" Text='<%# ((GridView)Container.Parent.Parent).PageIndex+1? %>'></asp:Label>页/共<asp:Label ID="lblPageCount" ForeColor="blue" runat="server" Text='<%# ((GridView)Container.Parent.Parent).PageCount %>'></asp:Label>页</span>&nbsp;&nbsp;
??????????????????????????? <asp:LinkButton ID="cmdFirstPage" runat="server" CommandName="Page" CommandArgument="First"? Enabled="<%# ((GridView)Container.Parent.Parent).PageIndex!=0 %>">首页</asp:LinkButton>&nbsp;
??????????????????????????? <asp:LinkButton ID="cmdPreview" runat="server" CommandArgument="Prev" CommandName="Page"? Enabled="<%# ((GridView)Container.Parent.Parent).PageIndex!=0 %>">上一页</asp:LinkButton>&nbsp;
??????????????????????????? <asp:LinkButton ID="cmdNext" runat="server" CommandName="Page" CommandArgument="Next"? Enabled="<%# ((GridView)Container.Parent.Parent).PageIndex!=((GridView)Container.Parent.Parent).PageCount-1 %>">下一页</asp:LinkButton>&nbsp;
??????????????????????????? <asp:LinkButton ID="cmdLastPage" runat="server" CommandArgument="Last" CommandName="Page"? Enabled="<%# ((GridView)Container.Parent.Parent).PageIndex!=((GridView)Container.Parent.Parent).PageCount-1 %>">尾页</asp:LinkButton>&nbsp;&nbsp;
??????????????????????????? 到<asp:TextBox ID="txtGoPage" runat="server" Text='<%# ((GridView)Container.Parent.Parent).PageIndex+1 %>'? Width="30px" CssClass="simpletextbox"></asp:TextBox>页
??????????????????????????? <asp:Button ID="Button3" runat="server" Width="40px"? OnClick="GridView_PageTurn" Text="跳转" CssClass="simplebutton" /></div>
??????????????????? </PagerTemplate>

</asp:GridView>

主要是：

AllowPaging：允许GridView分页

PageSize：默认10

OnDataBound：绑定到基类的事件，用于显示总记录数

OnPageIndexChanging：绑定到基类的事件，用于分页的数据处理

PagerTemplate：包括记录数，当前页，总页数，首页，尾页，上一页，下一页，页码跳转

其中页码跳转事件绑定到基类中的：GridView_PageTurn

?

4、最后编写获取数据的方法

重写基类的GridView_DataBind方法：其中查询数据，然后绑定到GridView。

?protected override void GridView_DataBind()
{

//获取数据，可以是获取全部，也可以是只获取当前页数据

...

//如果你想自己设置总记录数，可以使用IsUseCustomRecordCount

//这种情况适合分页获取少量数据的情况

IsUseCustomRecordCount=true;

GridView_RecordCount=10000;

//绑定数据到GridView

GridView1.DataSource = dv;
GridView1.DataBind();

}

以后只要有需要分页的列表，继承BasePage，然后设置相关属性，编写数据获取代码就可以了。不必在每个页面都编写OnPageIndexChanging，OnDataBound，以及页码跳转的代码，统一实现，节省工作量。

你还可以使用统一的PageSize，只需要在BasePage添加一个属性，然后在GridView中设置PageSize的属性。

以上就是我使用的一个GridView分页模型，欢迎指正！

关键字: GridView GridView分页