ASP.NET技巧：DataGrid传统分页方式

2022-07-15 80酷酷网 80kuku.com

此分页方式与传统ASP分页方式相仿。

DataGridPage.aspx

以下为引用的内容：
<% 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="">
</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>
    <HeaderStyle BackColor="#AAAADD"></HeaderStyle>
    <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>
         <TD class="M" noWrap align="center"><asp:Literal id="Literal1" runat="server"></asp:Literal></TD>
        </TR>
        <TR>
         <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

以下为引用的内容：
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>
/// DataGridPage 的摘要说明。
/// </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)
{
   // 在此处放置用户代码以初始化页面
   if(!IsPostBack)
   {
    BindGrid();
   }
}
private void BindGrid()
{
   string connstring = "Server=.;Database=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>
   /// 生成页导航条。
   /// </summary>
   string strNav = "";
   int endpage;
   if (currentPage>1)
   {
    strNav += "<a href='?page="+ (currentPage-1).ToString() +"'>上一页</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() +"'>下一页</a> ";
   }
   Literal1.Text = strNav;
   Literal2.Text = "共 "+ numResults.ToString() +" 条供应信息，当前显示第 "+
    (start+1).ToString() +" - "+ to.ToString() +" 条，共 "+ pageCount.ToString() +" 页";
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
   //
   // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
   this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}