HELP!!!!!
点击页面上的 上一页等,没有反应,是什么原因?代码如下:
using System;
using System.Collections;
using System.ComponentModel;
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.OleDb;
namespace loupan
{
/// <summary>
/// morelpan 的摘要说明。
/// </summary>
public class morelpan : System.Web.UI.Page
{
//protected System.Web.UI.WebControls.DataGrid DataGrid1;
protected System.Web.UI.WebControls.DataGrid MyDataGrid;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Label lblPageCount;
protected System.Web.UI.WebControls.Label lblCurrentIndex;
protected System.Web.UI.WebControls.LinkButton btnFirst;
protected System.Web.UI.WebControls.LinkButton btnPrev;
protected System.Web.UI.WebControls.LinkButton btnNext;
protected System.Web.UI.WebControls.LinkButton btnLast;
private OleDbConnection cn = new OleDbConnection();
//OleDbConnection myConnection;
//OleDbCommand myCommand;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
btnFirst.Text = "最首页 ";
btnPrev.Text = "前一页 ";
btnNext.Text = "下一页 ";
btnLast.Text = "最后页 ";
//if(!IsPostBack)
//{
OpenDatabase();
BindGrid();
//}
}
private void OpenDatabase()
{
cn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source= "
+ HttpContext.Current.Server.MapPath( "lpan.mdb ");
cn.Open();
}
private void ShowStats()
{
lblCurrentIndex.Text = "第 " + (MyDataGrid.CurrentPageIndex + 1).ToString() + " 页 ";
lblPageCount.Text = "总共 " + MyDataGrid.PageCount.ToString() + " 页 ";
}
public void PagerButtonClick(object sender, EventArgs e)
{
string arg = ((LinkButton)sender).CommandArgument.ToString();
switch(arg)
{
case "next ":
if (MyDataGrid.CurrentPageIndex < (MyDataGrid.PageCount - 1))
{
MyDataGrid.CurrentPageIndex += 1;
}
break;
case "prev ":
if (MyDataGrid.CurrentPageIndex > 0)
{
MyDataGrid.CurrentPageIndex -= 1;
}
break;
case "last ":
MyDataGrid.CurrentPageIndex = (MyDataGrid.PageCount - 1);
break;
default:
MyDataGrid.CurrentPageIndex = System.Convert.ToInt32(arg);
break;
}
BindGrid();
ShowStats();
}
public void BindGrid()
{
OleDbConnection myConnection = cn;
DataSet ds = new DataSet();
OleDbDataAdapter adapter = new OleDbDataAdapter( "select lpmc,qy FROM lpan ", myConnection);
adapter.Fill(ds, "lpan ");
MyDataGrid.DataSource = ds.Tables[ "lpan "].DefaultView;
MyDataGrid.DataBind();
ShowStats();
}
#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.btnFirst.Click += new System.EventHandler(this.PagerButtonClick);
this.btnPrev.Click += new System.EventHandler(this.PagerButtonClick);
this.btnNext.Click += new System.EventHandler(this.PagerButtonClick);
this.btnLast.Click += new System.EventHandler(this.PagerButtonClick);
this.MyDataGrid.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.OnPageIndexChanged);
this.MyDataGrid.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.DataGrid1_ItemDataBound);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void OnPageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
{
int startIndex ;
startIndex = MyDataGrid.CurrentPageIndex * MyDataGrid.PageSize;
MyDataGrid.CurrentPageIndex = e.NewPageIndex;
BindGrid();
ShowStats();
}
}
}
[解决办法]
PagerButtonClick里的
MyDataGrid.CurrentPageIndex ＋＝1改成
MyDataGrid.pageindex = MyDataGrid.CurrentPageIndex ＋ 1
其他类似
