PAGINATION
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using System;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Intiem.Info.Web
{
[ToolboxData("<{0}:Pagination runat=server></{0}:Pagination>")]
public class Pagination : WebControl, INamingContainer
{
public delegate void CommandEventHandler(object sender, CommandEventArgs e);
public event CommandEventHandler CommandEvent;
public int PageSize
{
get
{
if (ViewState["_PageSize"] == null || ViewState["_PageSize"].ToString().Length <= 0)
{
ViewState["_PageSize"] = "20";
}
return int.Parse(ViewState["_PageSize"].ToString());
}
set
{
ViewState["_PageSize"] = value.ToString();
}
}
public int PageCount
{
get
{
if (ViewState["_PageCount"] == null || ViewState["_PageCount"].ToString().Length <= 0)
{
ViewState["_PageCount"] = "0";
}
return int.Parse(ViewState["_PageCount"].ToString());
}
}
public int PageIndex
{
get
{
if (ViewState["_PageIndex"] == null || ViewState["_PageIndex"].ToString().Length <= 0)
{
ViewState["_PageIndex"] = "0";
}
return int.Parse(ViewState["_PageIndex"].ToString());
}
set
{
ViewState["_PageIndex"] = value.ToString();
}
}
public int RowCount
{
get
{
if (ViewState["_RowCount"] == null || ViewState["_RowCount"].ToString().Length <= 0)
{
ViewState["_RowCount"] = "0";
}
return int.Parse(ViewState["_RowCount"].ToString());
}
set
{
ViewState["_RowCount"] = value.ToString();
ViewState["_PageCount"] = (RowCount + PageSize - 1) / PageSize;
}
}
protected void OnCommand(CommandEventArgs e)
{
switch (e.CommandName)
{
case "First": PageIndex = 0; break;
case "Last": PageIndex = PageIndex - 1; break;
case "Next": PageIndex = PageIndex + 1; break;
case "Finally": PageIndex = PageCount - 1; break;
}
if (CommandEvent != null) CommandEvent(this, e);
}
Button[] ButtonList = new Button[] { new Button(), new Button(), new Button(), new Button() };
string[] BLCommandID = new string[] { "First", "Last", "Next", "Finally" };
string[] BLCommandName = new string[] { "首页", "上一页", "下一页", "尾页" };
protected override void CreateChildControls()
{
for (int i = 0; i < ButtonList.Length; i++)
{
ButtonList[i].ID = BLCommandID[i];
ButtonList[i].CommandName = BLCommandID[i];
ButtonList[i].Text = BLCommandName[i];
ButtonList[i].Command += delegate(object sender, System.Web.UI.WebControls.CommandEventArgs e)
{
OnCommand(new CommandEventArgs(((Button)sender).ID, e));
};
this.Controls.Add(ButtonList[i]);
}
}
protected override void RenderContents(HtmlTextWriter output)
{
output.Write("总记录数:");
output.Write(" ");
output.Write(RowCount.ToString());
output.Write(" ");
output.Write("每页:");
output.Write(" ");
output.Write(PageSize.ToString());
output.Write(" ");
output.Write("条");
output.Write(" ");
output.Write("当前页/总页数");
output.Write(" ");
output.Write(Convert.ToString(PageIndex + 1));
output.Write(" ");
output.Write("/");
output.Write(" ");
output.Write(PageCount.ToString());
output.Write(" ");
if (PageIndex <= 0)
{
ButtonList[0].Enabled = false;
ButtonList[1].Enabled = false;
}
else
{
ButtonList[0].Enabled = true;
ButtonList[1].Enabled = true;
}
if (PageIndex + 1 >= PageCount)
{
ButtonList[2].Enabled = false;
ButtonList[3].Enabled = false;
}
else
{
ButtonList[2].Enabled = true;
ButtonList[3].Enabled = true;
}
for (int i = 0; i < ButtonList.Length; i++)
{
ButtonList[i].RenderControl(output);
output.Write(" ");
}
}
}
}
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