DataList用法之小博客

最新推荐文章于 2024-12-23 09:35:18 发布

最新推荐文章于 2024-12-23 09:35:18 发布 · 246 阅读

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本文通过一个博客展示的例子介绍了ASP.NET中DataList控件的使用方法，包括页面布局、数据绑定及分页等功能。

DataList用法之小博客 <body>
<form id="form1" runat="server">
<div>
<center>
<asp:DataList ID="DataList1" runat="server" Width="554px" OnItemCommand="DataList1_ItemCommand">
<HeaderTemplate><table width="100%">
<tr><td>选择</td><td>图象</td><td>博客名</td><td>博客地址</td><td>操作</td></tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td><asp:CheckBox ID="select" runat="server" /></td>
<td><asp:Image ID="image" runat="server" Height="80" Width="80" ImageUrl="~/image/Blue hills.jpg"/></td>
<td><asp:Label ID="blogname" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"blogname") %>'></asp:Label></td>
<td><asp:Label ID="blogurl" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"blogurl") %>' /></td>
<td><asp:LinkButton ID="accept" runat="server" CommandName="accept" Text="接受" /> <asp:LinkButton ID="reguest" runat="server" Text="拒绝"/></td>
</tr>
</ItemTemplate>
<SeparatorTemplate><tr><td colspan="5"><hr /></td></tr></SeparatorTemplate>
<FooterTemplate></table></FooterTemplate>
</asp:DataList> </center>
      

<asp:Button ID="Button1" runat="server" Text="全选" OnClick="Button1_Click" /> <br />
     
<asp:Label ID="Label1" runat="server" Text="当前页:"></asp:Label>
<asp:Label ID="Label2" runat="server" Text="1" Width="31px"></asp:Label>
<asp:Label ID="Label3" runat="server" Text="总页数:"></asp:Label>
<asp:Label ID="Label4" runat="server" Width="58px"></asp:Label>
    
<asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">首页</asp:LinkButton>
<asp:LinkButton ID="LinkButton2" runat="server" OnClick="LinkButton2_Click">上一页</asp:LinkButton>
<asp:LinkButton ID="LinkButton3" runat="server" OnClick="LinkButton3_Click">下一页</asp:LinkButton>
<asp:LinkButton ID="LinkButton4" runat="server" OnClick="LinkButton4_Click">末页</asp:LinkButton></div>
</form>
</body>
隐藏代码如下:
Title
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;

public partial class DataList : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
bindData();
}
}
public void bindData()
{
DataTable dt = new DataTable("blog"); //定一个表对象
DataColumn dc = new DataColumn("id", typeof(int)); //定义一个字段对象
dc.AutoIncrement = true; //将id字段设为自动增长
dt.Columns.Add(dc); //添加第一个字段

dc = new DataColumn("blogname",typeof(string));
dt.Columns.Add(dc);

dc = new DataColumn("blogurl",typeof(string));
dt.Columns.Add(dc); /* 以上总结为,定义一个表*/

DataRow dr = dt.NewRow(); //定义一个DataRow对象
dr["blogname"] = "Tom's blog";
dr["blogurl"] = "http://www.sinablog.com";
dt.Rows.Add(dr);

dr = dt.NewRow();
dr["blogname"] = "Rose's blog";
dr["blogurl"] = "http://www.cnblog.com";
dt.Rows.Add(dr);

dr=dt.NewRow();
dr["blogname"]="Willy's blog";
dr["blogurl"]="http://www.ddblog.com";
dt.Rows.Add(dr);

dr=dt.NewRow();
dr["blogname"]="hugo's blog";
dr["blogurl"]="http://www.hublog.com";
dt.Rows.Add(dr);

dr=dt.NewRow();
dr["blogname"]="bosco's blog";
dr["blogurl"]="http://www.boblog.com";
dt.Rows.Add(dr);
/* 为表添加数据 */
PagedDataSource pds = new PagedDataSource();
pds.DataSource = dt.DefaultView ; //帮分页配置数据源
pds.AllowPaging = true; //允许分页
pds.PageSize = 2; //设置两个数据行一页
int CurrentIndex = Convert.ToInt32(this.Label2.Text) - 1; //当前页索引=当前页值-1
pds.CurrentPageIndex = CurrentIndex; //当前页索引

if(CurrentIndex==0 ) //首页时的状态
{
this.LinkButton1.Enabled=false;
this.LinkButton2.Enabled=false;
this.LinkButton3.Enabled=true;
this.LinkButton4.Enabled=true;
}
if(CurrentIndex==pds.PageCount-1) //末页时的状态
{
this.LinkButton1.Enabled=true;
this.LinkButton2.Enabled=true;
this.LinkButton3.Enabled=false;
this.LinkButton4.Enabled=false;

}
Label4.Text = pds.PageCount.ToString(); //总页数

this.DataList1.DataSource = pds; //获取数据源
this.DataList1.DataBind();

}
protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e) //通过点击事件获取你要的信息
{
if ( e.CommandSource.GetType() == typeof(LinkButton)) //先判断命令源的类型是哪种控件类型
{
if ( ((LinkButton)e.CommandSource).CommandName == "accept") //由于有几个LinkButton,所以要判断是哪个LinkButton
{
Response.Write(((Label)e.Item.FindControl("blogname")).Text); //打应相应控件对应的内容

}

}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (this.Button1.Text == "全选")
{
foreach (DataListItem dli in DataList1.Items) //遍历DataList1的全部项
{
CheckBox cb = (CheckBox)dli.FindControl("select"); //查找ID为select的CheckBox控件
cb.Checked = true;
}
Button1.Text = "全部取消";
}
else
{
foreach (DataListItem dli in DataList1.Items)
{
CheckBox cb = (CheckBox)dli.FindControl("select");
cb.Checked = false;
}
Button1.Text = "全选";
}
}

protected void LinkButton1_Click(object sender, EventArgs e)
{
this.Label2.Text = "1"; //首页
bindData();
}
protected void LinkButton2_Click(object sender, EventArgs e)
{
int temp = Convert.ToInt32(this.Label2.Text) - 1; //上一页
Label2.Text = temp.ToString();
bindData();
}
protected void LinkButton3_Click(object sender, EventArgs e)
{
int temp = Convert.ToInt32(this.Label2.Text) + 1; //下一页
Label2.Text = temp.ToString();
bindData();
}