扩展GridView控件 - 自定义分页样式

【IT168技术文档】

  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）

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("&nbsp"));
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("&nbsp;"));
tc.Controls.Add(Prev);
tc.Controls.Add(new LiteralControl("&nbsp;"));
#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("&nbsp;"));
}
#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("&nbsp"));
tc.Controls.Add(Last);
tc.Controls.Add(new LiteralControl("&nbsp;"));
#endregion
tc.Controls.Add(new LiteralControl("&nbsp"));
tc.ColumnSpan = this._sgv.Columns.Count;
row.Controls.Add(tc);
}
}
}