Repeater使用技巧

一、在ItemDataBound事件里面动态改变Repeater控件里面的html元素

如：

        <asp:Repeater ID="Repeater1" runat="server"
            onitemdatabound="Repeater1_ItemDataBound">
            <ItemTemplate>
                <table>
                    <tr id="row" runat="server">
                        <td>
                            <%#DataBinder.Eval(Container.DataItem,"title")%>
                        </td>
                    </tr>

后台程序
    protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        int i = e.Item.ItemIndex;
        if (i % 2 == 0)
        {
            HtmlTableRow row = (HtmlTableRow)e.Item.FindControl("row");
            if (row != null)
            {
                row.BgColor = System.Drawing.Color.Black.ToString();
            }
        }

        HtmlTableRow row2 = (HtmlTableRow)e.Item.FindControl("row2");
        if (row2 != null)
        {
             //在这里就可以对row2这个html的元素进行各种各样的赋值了
         }
    }

二、在Repeater控件里面嵌套Repeater控件
    <asp:Repeater runat="server" ID="rp1" OnItemDataBound="rp1_ItemDataBound">
        <ItemTemplate>
            <tr>
                <td >
                     <%#DataBinder.Eval(Container.DataItem,"title")%>
                </td>
            </tr>
            <tr>
                <td>
                    <div >
                        <asp:Repeater runat="server" ID="rp1">
                            <ItemTemplate>

                                <%#DataBinder.Eval(Container.DataItem,"title2")%>
                              </ItemTemplate>
                        </asp:Repeater>
                    </div>
                </td>
            </tr>
        </ItemTemplate>
    </asp:Repeater>

CS代码

        private void Bind()
        { ……
            this.rptypelist.DataSource = dt;
            this.rptypelist.DataBind();
        }
        protected void rp1_ItemDataBound(object sender, RepeaterItemEventArgs e)
        {

//判断里层repeater处于外层repeater的哪个位置（ AlternatingItemTemplate，FooterTemplate，HeaderTemplate，，ItemTemplate，SeparatorTemplate）
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {
                Repeater rep = e.Item.FindControl("rp2") as Repeater;//找到里层的repeater对象
                DataRowView rowv = (DataRowView)e.Item.DataItem;//找到外层Repeater关联的数据项
                int title= Convert.ToInt32(rowv["title"]);

……
rep.DataSource = dt2;

                rep.DataBind();
            }
        }

三、添加序号的4种方法

1、<itemtemplate>
<tr><td>
<%# Container.ItemIndex + 1%>
</td></tr>
</itemtemplate>
2、<itemtemplate>
<tr><td>
<%# this.rpResult.Items.Count + 1%>
</td></tr>
</itemtemplate>

3、在<form></form>中添加<Label ID="dd" ></Label>

<Script. Language="JScript">
      function show()
   {
var bj = document.all.tags("LABEL");
for (i=0;i<obj.length;i++)
{
document.all["dd"][i].innerHTML=i+1;
}
   }
   </script>

4、后台实现方法
后台实现方法：

在.aspx里添加<asp:Label id="Label1" Runat="server"></asp:Label>

在.cs里添加

** void InitializeComponent()
{
   this.Repeater1.ItemDataBound += new System.Web.UI.WebControls.RepeaterItemEventHandler(this.Repeater1_ItemDataBound);
   this.Load += new System.EventHandler(this.Page_Load);

}

** void Repeater1_ItemDataBound(object source, System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
   {
    ((Label)e.Item.FindControl("Label1")).Text = Convert.ToString(e.Item.ItemIndex + 1);
   }
}