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[ASP.net教程]repeater留言板[转]


做了一个网站,其中的在线留言板块是用Repeater来显示留言的,这样可以用少的代码还实现多的功能,但是不知道怎么分页,要是留言过多就会使页面变的很长,能过查看众多网友的经验,知道用PagedDataSource来实现。

 

Repeater分页,需要依靠PagedDataSource。这个类存在于System.Web.UI.WebControls命名空间。它的作用是作为数据源与数据显示控件的中间介质。如:

  数据源->PagedDataSource->数据绑定控件

  之间的关系通过以下代码来实现:

  PagedDataSource pds=new PagedDataSource ();

  pds.DataSource=dataTable;

  repeater1.DataSource=pds;

  repeater1.DataBind();

这是前台aspx页代码

<div id="onlinely"><div id="xianshily"><asp:Repeater runat="server" ID="Repeater1"><ItemTemplate><ul id="xianshi1"><li id="xianshi2"><ul class="ly1"><li class="ly2">留言人:</li><li class="ly3"><asp:Label runat="server" ID="lyren" Text='<%#Eval("lyname") %>'></asp:Label></li><li class="ly4">时间:</li></ul><ul class="ly1"><li class="ly2">留言内容:</li><li class="ly3"><asp:Label runat="server" ID="lynr" Text='<%#Eval("neirong") %>'></asp:Label></li><li class="ly4"><asp:Label runat="server" ID="lyt" Text='<%#Eval("lytime") %>'></asp:Label></li></ul><ul class="ly1"><li class="ly2">回复:</li><li class="ly3"><asp:Label runat="server" ID="lyhf" Text='<%#Eval("huifu") %>'></asp:Label></li><li class="ly4"><asp:Label runat="server" ID="hft" Text='<%#Eval ("hftime") %>'></asp:Label></li></ul></li></ul></ItemTemplate></asp:Repeater></div><div id="pages"><asp:hyperlink id="lnkPrev" runat="server">上页</asp:hyperlink><asp:hyperlink id="lnkNext" runat="server">下页</asp:hyperlink>第<asp:label id="lblCurrentPage" runat="server"></asp:label>页 共 <asp:label id="lblTotalPage" runat="server"></asp:label>页</div><div id="ly"><ul><li><ul class="ly5"><li class="ly6">姓名:</li><li class="ly7"><asp:TextBox runat="server" ID="lyname"></asp:TextBox></li></ul><ul class="ly5"><li class="ly6">留言内容:</li><li class="ly7"><asp:TextBox runat="server" ID="lyneirong" TextMode="MultiLine" Wrap="true" Height="100px" Width="300px"></asp:TextBox></li></ul></li></ul><div id="tijiao"><ul><li><asp:Button runat="server" ID="Button1" Text="提交" onclick="tijiao_Click" /></li><li><asp:Button runat="server" ID="quxiao" Text="取消" onclick="quxiao_Click" /></li></ul></div></div></div>

这是aspx.cs页代码:

using System;using System.Data;using System.Data.SqlClient;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Data.Common;public partial class onlinely : System.Web.UI.Page{  SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["zgbygy"].ConnectionString);     protected void Page_Load(object sender, EventArgs e)  {    conn.Open();    string sql = "select * from liuyan order by lytime desc";    SqlCommand cmd = new SqlCommand(sql, conn);    SqlDataAdapter sda = new SqlDataAdapter(cmd);    DataSet ds = new DataSet();    sda.Fill(ds);    PagedDataSource pgds=new PagedDataSource();    pgds.DataSource = ds.Tables[0].DefaultView;     //    设置允许分页    pgds.AllowPaging = true;    //    每页显示为8行    pgds.PageSize = 8;    //    显示总共页数    lblTotalPage.Text = pgds.PageCount.ToString();    //   当前页    int CurrentPage;    //   请求页码为不为null设置当前页,否则为第一页    if (Request.QueryString["Page"] != null)    {      CurrentPage = Convert.ToInt32(Request.QueryString["Page"]);    }    else    {      CurrentPage = 1;    }    //  当前页所引为页码-1    pgds.CurrentPageIndex = CurrentPage - 1;    //  显示当前页码    lblCurrentPage.Text = CurrentPage.ToString();    //  如果不是第一页,通过参数Page设置上一页为当前页-1,否则不显示连接    if (!pgds.IsFirstPage)    {      //      Request.CurrentExecutionFilePath为当前请求虚拟路径      lnkPrev.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurrentPage - 1);    }    //    End If    //  如果不是最后一页,通过参数Page设置下一页为当前页+1,否则不显示连接    if (!pgds.IsLastPage)    {      //  Request.CurrentExecutionFilePath为当前请求虚拟路径      lnkNext.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurrentPage + 1);    }    Repeater1.DataSource =pgds;    Repeater1.DataBind();    cmd.Dispose();    conn.Close();   } protected void tijiao_Click(object sender, EventArgs e) {   try   {     conn.Open();     string sql = "insert into liuyan (lyname,neirong,lytime) values ('" +lyname.Text +"','" +lyneirong.Text + "','" + DateTime.Now + "')";     SqlCommand cmd = new SqlCommand(sql, conn);     cmd.ExecuteNonQuery();     conn.Close();     this.lyname.Text = "";     this.lyneirong.Text = "";          Response.Redirect("onlinely.aspx");   }   catch    {    } } protected void quxiao_Click(object sender, EventArgs e) {   this.lyname.Text = "";   this.lyneirong.Text = ""; } public void xinashi(object sender, EventArgs e) {   conn.Open();   string sql = "select * from liuyan";   SqlCommand cmd = new SqlCommand(sql, conn);   SqlDataAdapter sda = new SqlDataAdapter(cmd);   DataSet ds = new DataSet();   sda.Fill(ds);   Repeater1.DataSource = ds;   Repeater1.DataBind();   cmd.Dispose();   conn.Close();  } }