GridView既强大又好用。为了让它更强大、更好用，我们来写一个继承自GridView的控件。
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扩展GridView控件(10) - 自定义分页样式
作者：
webabcd
/*正式版的实现 开始*/
介绍
扩展GridView控件：
自定义分页样式。显示总记录数、每页记录数、当前页数、总页数、首页、上一页、下一页、末页和分页按钮
使用方法（设置CustomPagerSettings复合属性）：
PagingMode - 自定义分页的显示模式
TextFormat - 自定义分页的文本显示样式（四个占位符：{0}-每页显示记录数；{1}-总记录数；{2}-当前页数；{3}-总页数）
关键代码
using System;
using System.Collections.Generic;
using System.Text;
using System.Web.UI.WebControls;
using System.Web.UI;
using System.ComponentModel;
using System.Collections;
using System.Data;
using System.Web.UI.HtmlControls;
namespace YYControls.SmartGridViewFunction
{
/**//// <summary>
/// 扩展功能：自定义分页样式
/// </summary>
public class CustomPagerSettingsFunction : ExtendFunction
{
/**//// <summary>
/// 构造函数
/// </summary>
public CustomPagerSettingsFunction()
: base()
{
}
/**//// <summary>
/// 构造函数
/// </summary>
/// <param name="sgv">SmartGridView对象</param>
public CustomPagerSettingsFunction(SmartGridView sgv)
: base(sgv)
{
}
/**//// <summary>
/// 扩展功能的实现
/// </summary>
protected override void Execute()
{
this._sgv.InitPager += new SmartGridView.InitPagerHandler(_sgv_InitPager);
}
/**//// <summary>
/// SmartGridView的InitPager事件
/// </summary>
/// <param name="sender"></param>
/// <param name="row">一个 System.Web.UI.WebControls.GridViewRow，表示要初始化的页导航行</param>
/// <param name="columnSpan">页导航行应跨越的列数</param>
/// <param name="pagedDataSource">一个 System.Web.UI.WebControls.PagedDataSource，表示数据源</param>
void _sgv_InitPager(object sender, GridViewRow row, int columnSpan, PagedDataSource pagedDataSource)
{
int recordCount = pagedDataSource.DataSourceCount;
LinkButton First = new LinkButton();
LinkButton Prev = new LinkButton();
LinkButton Next = new LinkButton();
LinkButton Last = new LinkButton();
TableCell tc = new TableCell();
row.Controls.Clear();
tc.Controls.Add(new LiteralControl(" "));
显示总记录数 每页记录数 当前页数/总页数#region 显示总记录数 每页记录数 当前页数/总页数
string textFormat = String.Format(this._sgv.CustomPagerSettings.TextFormat,
pagedDataSource.PageSize,
pagedDataSource.DataSourceCount,
pagedDataSource.CurrentPageIndex + 1,
pagedDataSource.PageCount);
tc.Controls.Add(new LiteralControl(textFormat));
#endregion
设置“首页 上一页 下一页 末页”按钮#region 设置“首页 上一页 下一页 末页”按钮
if (!String.IsNullOrEmpty(this._sgv.PagerSettings.FirstPageImageUrl))
First.Text = "<img src='" + this._sgv.ResolveUrl(this._sgv.PagerSettings.FirstPageImageUrl) + "' border='0'/>";
else
First.Text = this._sgv.PagerSettings.FirstPageText;
First.CommandName = "Page";
First.CommandArgument = "First";
if (!String.IsNullOrEmpty(this._sgv.PagerSettings.PreviousPageImageUrl))
Prev.Text = "<img src='" + this._sgv.ResolveUrl(this._sgv.PagerSettings.PreviousPageImageUrl) + "' border='0'/>";
else
Prev.Text = this._sgv.PagerSettings.PreviousPageText;
Prev.CommandName = "Page";
Prev.CommandArgument = "Prev";
if (!String.IsNullOrEmpty(this._sgv.PagerSettings.NextPageImageUrl))
Next.Text = "<img src='" + this._sgv.ResolveUrl(this._sgv.PagerSettings.NextPageImageUrl) + "' border='0'/>";
else
Next.Text = this._sgv.PagerSettings.NextPageText;
Next.CommandName = "Page";
Next.CommandArgument = "Next";
if (!String.IsNullOrEmpty(this._sgv.PagerSettings.LastPageImageUrl))
Last.Text = "<img src='" + this._sgv.ResolveUrl(this._sgv.PagerSettings.LastPageImageUrl) + "' border='0'/>";
else
Last.Text = this._sgv.PagerSettings.LastPageText;
Last.CommandName = "Page";
Last.CommandArgument = "Last";
#endregion
添加首页，上一页按钮#region 添加首页，上一页按钮
if (this._sgv.PageIndex <= 0)
First.Enabled = Prev.Enabled = false;
else
First.Enabled = Prev.Enabled = true;
tc.Controls.Add(First);
tc.Controls.Add(new LiteralControl(" "));
tc.Controls.Add(Prev);
tc.Controls.Add(new LiteralControl(" "));
#endregion
显示数字分页按钮#region 显示数字分页按钮
// 当前页左边显示的数字分页按钮的数量
int rightCount = (int)(this._sgv.PagerSettings.PageButtonCount / 2);
// 当前页右边显示的数字分页按钮的数量
int leftCount = this._sgv.PagerSettings.PageButtonCount % 2 == 0 ? rightCount - 1 : rightCount;
for (int i = 0; i < this._sgv.PageCount; i++)
{
if (this._sgv.PageCount > this._sgv.PagerSettings.PageButtonCount)
{
if (i < this._sgv.PageIndex - leftCount && this._sgv.PageCount - 1 - i > this._sgv.PagerSettings.PageButtonCount - 1)
{
continue;
}
else if (i > this._sgv.PageIndex + rightCount && i > this._sgv.PagerSettings.PageButtonCount - 1)
{
continue;
}
}
if (i == this._sgv.PageIndex)
{
tc.Controls.Add(new LiteralControl("<span>" + (i + 1).ToString() + "</span>"));
}
else
{
LinkButton lb = new LinkButton();
lb.Text = (i + 1).ToString();
lb.CommandName = "Page";
lb.CommandArgument = (i + 1).ToString();
tc.Controls.Add(lb);
}
tc.Controls.Add(new LiteralControl(" "));
}
#endregion
添加下一页，末页按钮#region 添加下一页，末页按钮
if (this._sgv.PageIndex >= this._sgv.PageCount - 1)
Next.Enabled = Last.Enabled = false;
else
Next.Enabled = Last.Enabled = true;
tc.Controls.Add(Next);
tc.Controls.Add(new LiteralControl(" "));
tc.Controls.Add(Last);
tc.Controls.Add(new LiteralControl(" "));
#endregion
tc.Controls.Add(new LiteralControl(" "));
tc.ColumnSpan = this._sgv.Columns.Count;
row.Controls.Add(tc);
}
}
}
/*正式版的实现 结束*/
/*测试版的实现 开始*/
介绍
用着GridView自带的分页样式总觉得不太习惯，我们可以在PagerTemplate中来写一些自定义的样式，但是也挺麻烦的，其实我们可以扩展一下GridView，给它再增加一种分页样式
控件开发
1、新建一个继承自GridView的类。
/**//// <summary>
/// 继承自GridView
/// </summary>
[ToolboxData(@"<{0}:SmartGridView runat='server'></{0}:SmartGridView>")]
public class SmartGridView : GridView
{
}
2、新建一个Paging类，定义一个分页样式的枚举
using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
namespace YYControls.SmartGridView
{
/**//// <summary>
/// 自定义分页相关
/// </summary>
public class Paging
{
/**//// <summary>
/// 自定义分页样式
/// </summary>
public enum PagingStyleCollection
{
/**//// <summary>
/// 不用自定义分页样式
/// </summary>
None,
/**//// <summary>
/// 默认自定义分页样式
/// </summary>
Default
}
}
}
3、在继承自GridView的类中加一个上面定义的枚举属性
private Paging.PagingStyleCollection _pagingStyle;
/**//// <summary>
/// 自定义分页样式
/// </summary>
[Description("自定义分页样式"), DefaultValue(""), Category("扩展")]
public Paging.PagingStyleCollection PagingStyle
{
get { return _pagingStyle; }
set { _pagingStyle = value; }
}
4、如果GridView使用的是数据源控件的话，计算总记录数
/**//// <summary>
/// OnLoad
/// </summary>
/// <param name="e"></param>
protected override void OnLoad(EventArgs e)
{
// 查找ObjectDataSource
ObjectDataSource ods = Parent.FindControl(this.DataSourceID) as ObjectDataSource;
if (ods != null)
{
ods.Selected += new ObjectDataSourceStatusEventHandler(ods_Selected);
}
base.OnLoad(e);
}
private int? _recordCount = null;
/**//// <summary>
/// 计算总记录数
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ods_Selected(object sender, ObjectDataSourceStatusEventArgs e)
{
if (e.ReturnValue is IListSource)
{
_recordCount = ((IListSource)e.ReturnValue).GetList().Count;
}
}
5、重写OnRowCreated以实现自定义分页样式
/**//// <summary>
/// OnRowCreated
/// </summary>
/// <param name="e"></param>
protected override void OnRowCreated(GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.Pager && PagingStyle == Paging.PagingStyleCollection.Default)
{
LinkButton First =