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Asp. NET tip: DataGrid Traditional Paging mode

Source: Internet
Author: User
Tags count sql tostring visual studio
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This paging is similar to the traditional ASP paging approach.

datagridpage.aspx

The following are the referenced contents:
<%@ Page language= "C #" codebehind= "DataGridPage.aspx.cs" autoeventwireup= "false" inherits= "Netcrm.datagridpage"% >
<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 transitional//en" >
<HTML>
<HEAD>
<title>DataGridPage</title>
<meta name= "generator" content= "Microsoft Visual Studio. NET 7.1" >
<meta name= "Code_language" content= "C #" >
<meta name= "vs_defaultClientScript" content= "JavaScript" >
<meta name= "vs_targetschema" content= "http://schemas.microsoft.com/intellisense/ie5" >
</HEAD>
<body ms_positioning= "GridLayout" >
<form id= "Form1" method= "POST" runat= "Server" >
<asp:datagrid id= "DATAGRID1" runat= "Server" alternatingitemstyle-backcolor= "#eeeeee" headerstyle-backcolor= "# Aaaadd "
Font-size= "8pt" font-name= "Verdana" cellpadding= "3" borderwidth= "1px" bordercolor= "BLACK"
Pagerstyle-horizontalalign= "Right" pagerstyle-mode= "NumericPages"
Pagesize= "5" font-names= "Verdana" width= "100%" >
<alternatingitemstyle backcolor= "#EEEEEE" ></AlternatingItemStyle>
<pagerstyle horizontalalign= "Right" mode= "NumericPages" ></PagerStyle>
</asp:datagrid>
</form>
<table cellspacing= "0" cellpadding= "1" width= "100%" bgcolor= "#aaaadd" border= "0" >
<TBODY>
<TR>
<TD>
<table cellspacing= "0" cellpadding= "4" width= "100%" bgcolor= "#fef8e2" border= "0" >
<TBODY>
<TR>
&LT;TD class= "M" noWrap align= "center" ><asp:literal id= "Literal1" runat= "Server" ></asp:literal></ Td>
</TR>
<TR>
&LT;TD class= "C" noWrap align= "center" ><asp:literal id= "Literal2" runat= "Server" ></asp:literal></ Td>
</TR>
</TBODY>
</TABLE>
</TD>
</TR>
</TBODY>
</TABLE>
</body>
</HTML>

DataGridPage.aspx.cs

The following are the referenced contents:
Using System;
Using System.Collections;
Using System.ComponentModel;
Using System.Data;
Using System.Data.SqlClient;
Using System.Drawing;
Using System.Web;
Using System.Web.SessionState;
Using System.Web.UI;
Using System.Web.UI.WebControls;
Using System.Web.UI.HtmlControls;
Namespace Netcrm
{
<summary>
Summary description of the datagridpage.
</summary>
public class DataGridPage:System.Web.UI.Page
{
protected System.Web.UI.WebControls.Literal Literal1;
protected System.Web.UI.WebControls.Literal Literal2;
protected System.Web.UI.WebControls.DataGrid DataGrid1;
private void Page_Load (object sender, System.EventArgs e)
{
Place user code here to initialize page
if (! IsPostBack)
{
Bindgrid ();
}
}
private void Bindgrid ()
{
String connstring = "server=.;D Atabase=northwind; User Id=sa; password=; ";
String Sql= "Select * from Orders";
SqlConnection conn = new SqlConnection (connstring);
Conn. Open ();
DataSet ds = new DataSet ();
SqlDataAdapter sqladapter = new SqlDataAdapter (Sql,conn);
Sqladapter.fill (ds, "users");
DataView DataView = new DataView ();
DataView = ds. Tables[0]. DefaultView;
DataGrid1.DataSource = ds. Tables[0]. DefaultView;
Datagrid1.databind ();
String Cpage;
int pageSize = 10;
int currentpage;
int PageCount;
int numresults = 0;
if (request.querystring["page"]==null)
{
Cpage= "1";
}
Else
{
cpage=request.querystring["Page"]. ToString ();
}
Try
{
CurrentPage = Int32.Parse (cpage);
}
Catch
{
CurrentPage = 1;
}
numresults = 0;
int start = (int) ((currentPage-1) * pageSize);
int to = (int) (currentpage * pageSize);
If (start <= 0) start = 0;
Numresults = DataView. Count;
int a1=0;
PageCount = Math.divrem (numresults,pagesize,out a1);
if (a1>0)
{
pagecount++;
}
if (Currentpage>pagecount | | currentpage<=0)
{
CurrentPage = 1;
}
if (Currentpage==pagecount)
{
to = DataView. Count;
}
Create one DataTable with one column.
DataTable myTable = new DataTable ("MyTable");
MyTable = DataView. Table.clone ();
DataColumn colItem1 = new DataColumn ("name", Type.GetType ("System.String"));
DataColumn colItem2 = new DataColumn ("Types", Type.GetType ("System.String"));
DataColumn colItem3 = new DataColumn ("Vendor", Type.GetType ("System.String"));
MYTABLE.COLUMNS.ADD (COLITEM1);
MYTABLE.COLUMNS.ADD (COLITEM2);
MYTABLE.COLUMNS.ADD (COLITEM3);
Add row
DataRow NewRow;
for (int i=start;i<numresults;i++)
{
if (i<to)
{
NewRow = Mytable.newrow ();
for (int k=0;k<dataview. table.columns.count;k++)
{
Newrow[k] = DataView. TABLE.ROWS[I][K];
}
MYTABLE.ROWS.ADD (NewRow);
}
}
Mytable.acceptchanges ();
DataView Resultdataview = new DataView (myTable);
DataGrid1.DataSource = Resultdataview;
Datagrid1.databind ();
<summary>
Generates a pager bar.
</summary>
String strnav = "";
int endpage;
if (currentpage>1)
{
Strnav + = "<a href= '? page=" + (currentPage-1). ToString () + "' > Prev </a>";
}
if (currentpage>11)
{
Strnav + = "<a href= '" page=1 ' >1</a> ... ";
}
if (pagecount>currentpage+10)
{
EndPage = currentpage+10;
}
Else
{
EndPage = PageCount;
}
for (int i=currentpage-10;i<endpage+1;i++)
{
if (i>=1)
{
if (i==currentpage)
{
Strnav + = "<font color= #990000 ><strong>" + i.tostring () + "</strong></font>";
}
Else
{
Strnav + = "<a href= ' page=" + i.tostring () + "' >" + i.tostring () + "</a>";
}
}
}
if ((currentpage+10) <pagecount)
{
Strnav + = "... <a href= '? page=" + pagecount.tostring () + "' >" + pagecount.tostring () + "</a>";
}
if (Currentpage<pagecount)
{
Strnav + = "<a href= '? page=" + (currentpage+1). ToString () + "' > next page </a>";
}
Literal1.text = Strnav;
Literal2.text = "Total" + numresults.tostring () + "article supply information, currently showing the first" +
(start+1). ToString () + "-" + to. ToString () + "bar, total" + pagecount.tostring () + "page";
}
Code generated #region the Web forms Designer
Override protected void OnInit (EventArgs e)
{
//
CodeGen: This call is required for the ASP.net Web forms Designer.
//
InitializeComponent ();
Base. OnInit (e);
}
<summary>
Designer supports required methods-do not use the Code editor to modify
The contents of this method.
</summary>
private void InitializeComponent ()
{
This. Load + = new System.EventHandler (this. Page_Load);
}
#endregion
}
}



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