本文主要是介绍Eric的超高效数据分页(图示+代码) ^_^,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
运行截图:
数据表结构:
megaid int IDENTITY (1, 1) NOT NULL PRIMARY KEY CLUSTERED
megaguid char (36) NOT NULL INDEX
数据生成脚本:
数据表结构:
megaid int IDENTITY (1, 1) NOT NULL PRIMARY KEY CLUSTERED
megaguid char (36) NOT NULL INDEX
数据生成脚本:
DECLARE @i int
SET @i = 1
WHILE @i < 1000001
BEGIN
INSERT INTO megatable (megaguid) VALUES ( NEWID ())
SET @i = @i + 1
END
GO
SET @i = 1
WHILE @i < 1000001
BEGIN
INSERT INTO megatable (megaguid) VALUES ( NEWID ())
SET @i = @i + 1
END
GO
C#代码:
DateTime startTime;
void Page_Init(Object sender, EventArgs e)
{
startTime = DateTime.Now;
}
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
Response.Write("本页执行时间: " + (DateTime.Now - startTime));
}
int records = 10000 ;
int pages = 10 ;
int pageSize = 15 ;
SqlConnection conn = new SqlConnection( " Server=(local);Database=megadata;User Id=sa;Password=xxx " );
void Page_Load( object sender, EventArgs e)
{
if (!IsPostBack)
{
dgBind(getSqlString(1));
}
int firstPage = int.Parse(hidFirstPage.Value);
pnlButtons.Controls.Add(getPager(firstPage));
lblPrompt.Text = "数据提取范围: <B>SELECT TOP " + records.ToString() + " megaid FROM megatable ORDER BY megaguid</B>";
}
string getSqlString( int selectedPage)
{
string[] idsStrArray;
string sqlStr;
if (Session["idStr"] != null)
{
idsStrArray = Session["idStr"].ToString().Split('#');
}
else
{
sqlStr = "SELECT TOP " + records.ToString() + " megaid FROM megatable ORDER BY megaguid";
SqlCommand cmd = new SqlCommand(sqlStr, conn);
conn.Open();
SqlDataReader dr = cmd.ExecuteReader();
StringBuilder sb = new StringBuilder("");
int n = 1;
while (dr.Read())
{
if (n % pageSize == 0)
{
sb.Append(dr[0].ToString() + "#");
}
else
{
sb.Append(dr[0].ToString() + ",");
}
n++;
}
dr.Close();
conn.Close();
sb.Remove(sb.Length - 1, 1);
idsStrArray = sb.ToString().Split('#');
Session["idStr"] = sb.ToString();
}
hidPageCount.Value = idsStrArray.Length.ToString();
sqlStr = "SELECT megaid, megaguid FROM megatable WHERE megaid IN (" + idsStrArray[selectedPage - 1] + ") ";
sqlStr += "ORDER BY megaguid";
return sqlStr;
}
Panel getPager( int firstPage)
{
int pageCount = int.Parse(hidPageCount.Value);
Panel pnlPager = new Panel();
pnlPager.Controls.Add(new LiteralControl("<BR> 共" + pageCount.ToString() + "页 "));
pnlPager.Controls.Add(getLinkButton("Fst", "首页", "pgBtn", "1"));
pnlPager.Controls.Add(new LiteralControl(" "));
if (firstPage > 0)
{
pnlPager.Controls.Add(getLinkButton("Pre", "前" + pages.ToString() + "页", "pgBtn", (firstPage - pages + 1).ToString()));
pnlPager.Controls.Add(new LiteralControl(" "));
}
for (int i = firstPage + 1; i < firstPage + pages + 1; i++)
{
if (i > pageCount)
{
break;
}
pnlPager.Controls.Add(getLinkButton(i.ToString(), "[" + i.ToString() + "]", "pgBtn", i.ToString()));
pnlPager.Controls.Add(new LiteralControl(" "));
}
if (firstPage + pages < pageCount)
{
pnlPager.Controls.Add(getLinkButton("Nxt", "后" + pages.ToString() + "页", "pgBtn", (firstPage + pages + 1).ToString()));
pnlPager.Controls.Add(new LiteralControl(" "));
}
pnlPager.Controls.Add(getLinkButton("Lst", "末页", "pgBtn", pageCount.ToString()));
return pnlPager;
}
LinkButton getLinkButton( string lbId, string lbText, string lbCmdName, string lbCmdArg)
{
LinkButton lb = new LinkButton();
lb.ID = lbCmdName + lbId;
lb.Text = lbText;
lb.CommandName = lbCmdName;
lb.CommandArgument = lbCmdArg;
lb.Command += new CommandEventHandler(pageTurn);
return lb;
}
void pageTurn( object sender, CommandEventArgs e)
{
LinkButton lb = (LinkButton)sender;
int selectedPage = int.Parse(lb.CommandArgument);
int firstPage = selectedPage / pages * pages;
firstPage = (selectedPage % pages == 0) ? (firstPage - pages) : firstPage;
hidFirstPage.Value = firstPage.ToString();
dgBind(getSqlString(selectedPage));
pnlButtons.Controls.RemoveAt(pnlButtons.Controls.Count - 1);
pnlButtons.Controls.Add(getPager(firstPage));
lb = (LinkButton)pnlButtons.Controls[pnlButtons.Controls.Count - 1].FindControl("pgBtn" + selectedPage.ToString());
lb.Enabled = false;
}
void dgBind( string sqlStr)
{
SqlDataAdapter da = new SqlDataAdapter(sqlStr, conn);
DataTable dt = new DataTable();
conn.Open();
da.Fill(dt);
conn.Close();
da.Dispose();
dg.DataSource = dt;
dg.DataBind();
}
void dg_ItemDataBound( object sender, DataGridItemEventArgs e)
{
dg.Controls[0].EnableViewState = false;
}
void Page_Init(Object sender, EventArgs e)
{
startTime = DateTime.Now;
}
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
Response.Write("本页执行时间: " + (DateTime.Now - startTime));
}
int records = 10000 ;
int pages = 10 ;
int pageSize = 15 ;
SqlConnection conn = new SqlConnection( " Server=(local);Database=megadata;User Id=sa;Password=xxx " );
void Page_Load( object sender, EventArgs e)
{
if (!IsPostBack)
{
dgBind(getSqlString(1));
}
int firstPage = int.Parse(hidFirstPage.Value);
pnlButtons.Controls.Add(getPager(firstPage));
lblPrompt.Text = "数据提取范围: <B>SELECT TOP " + records.ToString() + " megaid FROM megatable ORDER BY megaguid</B>";
}
string getSqlString( int selectedPage)
{
string[] idsStrArray;
string sqlStr;
if (Session["idStr"] != null)
{
idsStrArray = Session["idStr"].ToString().Split('#');
}
else
{
sqlStr = "SELECT TOP " + records.ToString() + " megaid FROM megatable ORDER BY megaguid";
SqlCommand cmd = new SqlCommand(sqlStr, conn);
conn.Open();
SqlDataReader dr = cmd.ExecuteReader();
StringBuilder sb = new StringBuilder("");
int n = 1;
while (dr.Read())
{
if (n % pageSize == 0)
{
sb.Append(dr[0].ToString() + "#");
}
else
{
sb.Append(dr[0].ToString() + ",");
}
n++;
}
dr.Close();
conn.Close();
sb.Remove(sb.Length - 1, 1);
idsStrArray = sb.ToString().Split('#');
Session["idStr"] = sb.ToString();
}
hidPageCount.Value = idsStrArray.Length.ToString();
sqlStr = "SELECT megaid, megaguid FROM megatable WHERE megaid IN (" + idsStrArray[selectedPage - 1] + ") ";
sqlStr += "ORDER BY megaguid";
return sqlStr;
}
Panel getPager( int firstPage)
{
int pageCount = int.Parse(hidPageCount.Value);
Panel pnlPager = new Panel();
pnlPager.Controls.Add(new LiteralControl("<BR> 共" + pageCount.ToString() + "页 "));
pnlPager.Controls.Add(getLinkButton("Fst", "首页", "pgBtn", "1"));
pnlPager.Controls.Add(new LiteralControl(" "));
if (firstPage > 0)
{
pnlPager.Controls.Add(getLinkButton("Pre", "前" + pages.ToString() + "页", "pgBtn", (firstPage - pages + 1).ToString()));
pnlPager.Controls.Add(new LiteralControl(" "));
}
for (int i = firstPage + 1; i < firstPage + pages + 1; i++)
{
if (i > pageCount)
{
break;
}
pnlPager.Controls.Add(getLinkButton(i.ToString(), "[" + i.ToString() + "]", "pgBtn", i.ToString()));
pnlPager.Controls.Add(new LiteralControl(" "));
}
if (firstPage + pages < pageCount)
{
pnlPager.Controls.Add(getLinkButton("Nxt", "后" + pages.ToString() + "页", "pgBtn", (firstPage + pages + 1).ToString()));
pnlPager.Controls.Add(new LiteralControl(" "));
}
pnlPager.Controls.Add(getLinkButton("Lst", "末页", "pgBtn", pageCount.ToString()));
return pnlPager;
}
LinkButton getLinkButton( string lbId, string lbText, string lbCmdName, string lbCmdArg)
{
LinkButton lb = new LinkButton();
lb.ID = lbCmdName + lbId;
lb.Text = lbText;
lb.CommandName = lbCmdName;
lb.CommandArgument = lbCmdArg;
lb.Command += new CommandEventHandler(pageTurn);
return lb;
}
void pageTurn( object sender, CommandEventArgs e)
{
LinkButton lb = (LinkButton)sender;
int selectedPage = int.Parse(lb.CommandArgument);
int firstPage = selectedPage / pages * pages;
firstPage = (selectedPage % pages == 0) ? (firstPage - pages) : firstPage;
hidFirstPage.Value = firstPage.ToString();
dgBind(getSqlString(selectedPage));
pnlButtons.Controls.RemoveAt(pnlButtons.Controls.Count - 1);
pnlButtons.Controls.Add(getPager(firstPage));
lb = (LinkButton)pnlButtons.Controls[pnlButtons.Controls.Count - 1].FindControl("pgBtn" + selectedPage.ToString());
lb.Enabled = false;
}
void dgBind( string sqlStr)
{
SqlDataAdapter da = new SqlDataAdapter(sqlStr, conn);
DataTable dt = new DataTable();
conn.Open();
da.Fill(dt);
conn.Close();
da.Dispose();
dg.DataSource = dt;
dg.DataBind();
}
void dg_ItemDataBound( object sender, DataGridItemEventArgs e)
{
dg.Controls[0].EnableViewState = false;
}
ASPX代码:
<% @ Import Namespace="System.Text" %>
<% @ Import Namespace="System.Data.SqlClient" %>
<% @ Import Namespace="System.Data" %>
<% @ Page Language="C#" %>
<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd" >
< HTML >
< HEAD >
< TITLE > Pager </ TITLE >
< SCRIPT runat ="server" >
//插入上面的C#代码
</ SCRIPT >
< STYLE > BODY {}{ FONT-SIZE: 9pt; FONT-FAMILY: Tahoma,宋体; TEXT-ALIGN: center }
TD {}{ FONT-SIZE: 9pt; FONT-FAMILY: Tahoma,宋体; TEXT-ALIGN: center }
</ STYLE >
</ HEAD >
< BODY >
< FORM id ="form1" runat ="server" >
< DIV >
< ASP:LABEL id ="lblPrompt" runat ="server" text ="?" enableviewstate ="False" enabletheming ="True" ></ ASP:LABEL >
< BR >
< ASP:PANEL id ="pnlButtons" runat ="server" width ="560px" >
< INPUT id ="hidFirstPage" type ="hidden" value ="0" runat ="server" >< INPUT id ="hidPageCount" type ="hidden" runat ="server" >
< ASP:DATAGRID id ="dg" runat ="server" width ="100%" onitemdatabound ="dg_ItemDataBound" cellpadding ="4"
backcolor ="White" borderwidth ="1px" borderstyle ="None" bordercolor ="#CC9966" autogeneratecolumns ="False"
pagesize ="5" >
< FOOTERSTYLE forecolor ="#330099" backcolor ="#FFFFCC" ></ FOOTERSTYLE >
< HEADERSTYLE font-bold ="True" forecolor ="#FFFFCC" backcolor ="#990000" ></ HEADERSTYLE >
< PAGERSTYLE horizontalalign ="Center" forecolor ="#330099" backcolor ="#FFFFCC" ></ PAGERSTYLE >
< SELECTEDITEMSTYLE font-bold ="True" forecolor ="#663399" backcolor ="#FFCC66" ></ SELECTEDITEMSTYLE >
< ITEMSTYLE forecolor ="#330099" backcolor ="White" ></ ITEMSTYLE >
< COLUMNS >
< ASP:BOUNDCOLUMN datafield ="megaid" headertext ="MegaID" ></ ASP:BOUNDCOLUMN >
< ASP:BOUNDCOLUMN datafield ="megaguid" headertext ="MegaGUID" ></ ASP:BOUNDCOLUMN >
</ COLUMNS >
</ ASP:DATAGRID >
</ ASP:PANEL ></ DIV >
< BR >
< ASP:HYPERLINK id ="lnkReload" runat ="server" width ="80px" navigateurl ="Pager.aspx" enableviewstate ="False" > 重载 </ ASP:HYPERLINK >
</ FORM >
</ BODY >
</ HTML >
<% @ Import Namespace="System.Data.SqlClient" %>
<% @ Import Namespace="System.Data" %>
<% @ Page Language="C#" %>
<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd" >
< HTML >
< HEAD >
< TITLE > Pager </ TITLE >
< SCRIPT runat ="server" >
//插入上面的C#代码
</ SCRIPT >
< STYLE > BODY {}{ FONT-SIZE: 9pt; FONT-FAMILY: Tahoma,宋体; TEXT-ALIGN: center }
TD {}{ FONT-SIZE: 9pt; FONT-FAMILY: Tahoma,宋体; TEXT-ALIGN: center }
</ STYLE >
</ HEAD >
< BODY >
< FORM id ="form1" runat ="server" >
< DIV >
< ASP:LABEL id ="lblPrompt" runat ="server" text ="?" enableviewstate ="False" enabletheming ="True" ></ ASP:LABEL >
< BR >
< ASP:PANEL id ="pnlButtons" runat ="server" width ="560px" >
< INPUT id ="hidFirstPage" type ="hidden" value ="0" runat ="server" >< INPUT id ="hidPageCount" type ="hidden" runat ="server" >
< ASP:DATAGRID id ="dg" runat ="server" width ="100%" onitemdatabound ="dg_ItemDataBound" cellpadding ="4"
backcolor ="White" borderwidth ="1px" borderstyle ="None" bordercolor ="#CC9966" autogeneratecolumns ="False"
pagesize ="5" >
< FOOTERSTYLE forecolor ="#330099" backcolor ="#FFFFCC" ></ FOOTERSTYLE >
< HEADERSTYLE font-bold ="True" forecolor ="#FFFFCC" backcolor ="#990000" ></ HEADERSTYLE >
< PAGERSTYLE horizontalalign ="Center" forecolor ="#330099" backcolor ="#FFFFCC" ></ PAGERSTYLE >
< SELECTEDITEMSTYLE font-bold ="True" forecolor ="#663399" backcolor ="#FFCC66" ></ SELECTEDITEMSTYLE >
< ITEMSTYLE forecolor ="#330099" backcolor ="White" ></ ITEMSTYLE >
< COLUMNS >
< ASP:BOUNDCOLUMN datafield ="megaid" headertext ="MegaID" ></ ASP:BOUNDCOLUMN >
< ASP:BOUNDCOLUMN datafield ="megaguid" headertext ="MegaGUID" ></ ASP:BOUNDCOLUMN >
</ COLUMNS >
</ ASP:DATAGRID >
</ ASP:PANEL ></ DIV >
< BR >
< ASP:HYPERLINK id ="lnkReload" runat ="server" width ="80px" navigateurl ="Pager.aspx" enableviewstate ="False" > 重载 </ ASP:HYPERLINK >
</ FORM >
</ BODY >
</ HTML >
这篇关于Eric的超高效数据分页(图示+代码) ^_^的文章就介绍到这儿,希望我们推荐的文章对编程师们有所帮助!