使用这种方法的datalist分页控件有问题
使用这种方法的datalist分页控件有问题，在点击下一页或者上一页时，上次DataList绑定的记录仍然显示在DataList中没有清空，而且如果在程序中使用代码清空时会提示前台代码中有 <% %> 不能修改
大家是如何解决这个问题的？
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
PageSize = 10;
sql= "select * from products order by all_time desc ";
if(!Page.IsPostBack)
{
//计算总共有多少记录
RecordCount = CalculateRecord();
//计算总共有多少页
//取整
PageCount = RecordCount/PageSize;
if (RecordCount%PageSize > 0)
PageCount = PageCount + 1;
lblPageCount.Text = PageCount.ToString();
lblRecordCount.Text = RecordCount.ToString();
ViewState[ "PageCount "] = PageCount;
CurrentPage = 0;
ViewState[ "PageIndex "] = 0;
//绑定
ListBind();
}
}
public int CalculateRecord()
{
int intCount;
string strCount = "select count(*) as co from products ";
SqlConnection Con=new SqlConnection(data.constr);
SqlCommand addCommand=new SqlCommand(strCount,Con);
addCommand.Connection.Open();
SqlDataReader dr;
dr=addCommand.ExecuteReader();
if(dr.Read())
{
intCount = Int32.Parse(dr[ "co "].ToString());
}
else
{
intCount = 0;
}
dr.Close();
return intCount;
}
ICollection CreateSource()
{
int StartIndex;
//设定导入的起终地址
StartIndex = CurrentPage*PageSize;
string strSel = "select * from products ";
SqlConnection Con=new SqlConnection(data.constr);
DataSet ds = new DataSet();
SqlDataAdapter MyAdapter = new SqlDataAdapter(strSel,Con);
MyAdapter.Fill(ds,StartIndex,PageSize, "products ");
return ds.Tables[ "products "].DefaultView;
}
public void ListBind()
{
dl1.DataSource = CreateSource();
dl1.DataBind();
lbnNextPage.Enabled = true;
lbnPrevPage.Enabled = true;
if(PageCount==0)
{
lblCurrentPage.Text = "0 ";
lbnNextPage.Enabled = false;
lbnPrevPage.Enabled = false;
}
else
{
if(CurrentPage==(PageCount-1)) lbnNextPage.Enabled = false;
if(CurrentPage==0) lbnPrevPage.Enabled = false;
lblCurrentPage.Text = (CurrentPage+1).ToString();
}
}
public void Page_OnClick(Object sender,CommandEventArgs e)
{
CurrentPage = (int)ViewState[ "PageIndex "];
PageCount = (int)ViewState[ "PageCount "];
string cmd = e.CommandName;
//判断cmd，以判定翻页方向
switch(cmd)
{
case "next ":
if(CurrentPage <(PageCount-1)) CurrentPage++;
break;
case "prev ":
if(CurrentPage> 0) CurrentPage--;
break;
case "first ":
CurrentPage=0;
break;
case "last ":
CurrentPage=PageCount-1;
break;
}
ViewState[ "PageIndex "] = CurrentPage;
ListBind();
}
HTML 部分：
<TABLE id= "Table2 " style= "Z-INDEX: 102; LEFT: 128px; WIDTH: 648px; POSITION: absolute; TOP: 432px; HEIGHT: 27px "cellSpacing= "1 " cellPadding= "1 " width= "648 " border= "1 ">
<TR>
<TD> <FONT face= "宋体 "> 共 <asp:label id= "lblRecordCount " runat= "server "> Label </asp:label> 条记录 共 <asp:label id= "lblPageCount " runat= "server "> Label </asp:label> 页 当前第 <asp:label id= "lblCurrentPage " runat= "server "> Label </asp:label> 页 <asp:LinkButton id= "lbnFirstPage " runat= "server " OnCommand= "Page_OnClick " CommandName= "first "> 首页 </asp:LinkButton> <asp:linkbuttonid= "lbnPrevPage "runat= "server "OnCommand= "Page_OnClick " CommandName= "prev "> 上一页 </asp:linkbutton> <asp:linkbutton id= "lbnNextPage " runat= "server " OnCommand= "Page_OnClick " CommandName= "next "> 下一页 </asp:linkbutton>
<asp:LinkButton id= "lbnLastPage " runat= "server " OnCommand= "Page_OnClick " CommandName= "last "> 尾页 </asp:LinkButton> </FONT> </TD> </TR> </TABLE>
[解决办法]
是加载方式的问题
