.NET中使用datagrid实现的简单分页效果-控件新闻-慧都网

.NET中使用datagrid实现的简单分页效果

翻译|其它|编辑：郝浩|2005-05-10 10:00:00.000|阅读 1342 次

概述：

.NET中使用datagrid实现的简单分页效果

<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="Try1.WebForm1" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm1</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
 

<asp:DataGrid id="DataGrid1" runat="server" BorderColor="#3366CC" BorderStyle="None" BorderWidth="1px"
BackColor="White" CellPadding="4" AllowPaging="True" PageSize="5" AllowSorting="True">
<SelectedItemStyle Font-Bold="True" ForeColor="#CCFF99" BackColor="#009999"></SelectedItemStyle>
<ItemStyle ForeColor="#003399" BackColor="White"></ItemStyle>
<HeaderStyle Font-Bold="True" ForeColor="#CCCCFF" BackColor="#003399"></HeaderStyle>
<FooterStyle ForeColor="#003399" BackColor="#99CCCC"></FooterStyle>
<PagerStyle HorizontalAlign="Left" ForeColor="#003399" BackColor="#99CCCC" PageButtonCount="6"
Mode="NumericPages"></PagerStyle>
</asp:DataGrid>

<asp:Panel id="Panel1" runat="server">
<asp:LinkButton id="btnPrevious" runat="server" CommandName="Previous"><=Previous</asp:LinkButton>
          
<asp:LinkButton id="btnNext" runat="server" CommandName="Next">Next=></asp:LinkButton>
<asp:TextBox id="txtIndex" runat="server" Width="24px" Columns="2" MaxLength="2"></asp:TextBox>
<asp:Button id="btnGo" runat="server" BackColor="Gainsboro" BorderWidth="1px" BorderStyle="Solid"
BorderColor="Silver" Text="Go!"></asp:Button>
<asp:Label id="lblError" runat="server" ForeColor="Red" Visible="False">No that page!</asp:Label>
</asp:Panel>

<asp:Panel id="pnlIndex" runat="server">Panel</asp:Panel>
</form>
</body>
</HTML>

//-------后台代码---------------------------------
//-------使用的数据库是sqlserver2000示例数据库------
using System;
using System.Collections;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
namespace Try1
{
/// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid DataGrid1;
private DataSet dsNorth;
protected System.Web.UI.WebControls.Panel Panel1;
protected System.Web.UI.WebControls.LinkButton btnPrevious;
protected System.Web.UI.WebControls.LinkButton btnNext;

//使用dataview，以实现排序效果
private DataView dvNorth;
protected System.Web.UI.WebControls.TextBox txtIndex;
protected System.Web.UI.WebControls.Button btnGo;
protected System.Web.UI.WebControls.Label lblError;
protected System.Web.UI.WebControls.Panel pnlIndex;

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
LoadDataSet();
InitpnlIndex();
}
#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.DataGrid1.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.DataGrid1_PageIndexChanged);
this.DataGrid1.SortCommand += new System.Web.UI.WebControls.DataGridSortCommandEventHandler(this.DataGrid1_SortCommand);
this.btnPrevious.Click += new System.EventHandler(this.NavigationButtonClick);
this.btnNext.Click += new System.EventHandler(this.NavigationButtonClick);
this.btnGo.Click += new System.EventHandler(this.btnGo_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion

//加载数据集
private void LoadDataSet()
{
SqlConnection cnNorth=new SqlConnection(ConfigurationSettings.AppSettings["cnNorth.ConnectionString"]);
string cmdString="SELECT * FROM Customers";
SqlDataAdapter adNorth=new SqlDataAdapter(cmdString,cnNorth);
cnNorth.Open();
dsNorth=new DataSet();
try
{
adNorth.Fill(dsNorth,"North");
}
catch
 {
 throw;
 }
finally
{
 cnNorth.Close();
}
 dvNorth=new DataView();
 dvNorth.Table=dsNorth.Tables["North"];
 DataGrid1.DataSource=dvNorth;
 DataGrid1.DataBind();
}

//初始化索引
private void InitpnlIndex()
{
pnlIndex.Controls.Clear();
int pageCount;
LinkButton btnIndex;
for (pageCount=0;pageCount<DataGrid1.PageCount;pageCount++)
{
int btnText=pageCount+1;
btnIndex=new LinkButton();
btnIndex.Text=btnText.ToString();
btnIndex.CommandName=pageCount.ToString();
btnIndex.Click+=new EventHandler(this.IndexButtonClick);
pnlIndex.Controls.Add(btnIndex);
pnlIndex.Controls.Add(new LiteralControl(" "));
}
}

//索引单击效果
private void IndexButtonClick(object sender,System.EventArgs e)
{
string direction=((LinkButton)sender).CommandName;
 int pageIndex=Convert.ToInt32(direction);
 DataGrid1.CurrentPageIndex=pageIndex;
DataGrid1.DataBind();
}

//排序效果实现
private void DataGrid1_SortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
{
this.dvNorth.Sort=e.SortExpression;
DataGrid1.DataBind();
}

//索引单击效果
private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
{
DataGrid1.CurrentPageIndex=e.NewPageIndex;
DataGrid1.DataBind();
}

//翻页效果
private void NavigationButtonClick(object sender, System.EventArgs e)
{
string direction=((LinkButton)sender).CommandName;
switch(direction.ToUpper())
{
case "PREVIOUS":
 DataGrid1.CurrentPageIndex=Math.Max(DataGrid1.CurrentPageIndex-1,0);
break;
case "NEXT":
 DataGrid1.CurrentPageIndex=Math.Min(DataGrid1.CurrentPageIndex+1,DataGrid1.PageCount-1);
break;
default:
break;
}
DataGrid1.DataBind();

}

//去第几页效果
private void btnGo_Click(object sender, System.EventArgs e)
{
int pageIndex=0;
try
{
pageIndex=Convert.ToInt32(txtIndex.Text);

}
catch(Exception ex)
{
lblError.Visible=true;
lblError.Text=ex.Message;
}
finally
{
 lblError.Visible=false;
 lblError.Text="No that page!";
 }
 if(pageIndex>0&&pageIndex<=DataGrid1.PageCount)
{
try
{
DataGrid1.CurrentPageIndex=Math.Min(DataGrid1.PageCount,pageIndex-1);
DataGrid1.DataBind();
}
 catch
{
 lblError.Visible=true;

}
 finally
{
 lblError.Visible=false;
}
}
else
{
 lblError.Visible=true;
}
}

}
}