Repeater基础
在aspx文件中加入Repeater 控件,在<ItemTemplate></ItemTemplate>包含的范围里加入自己控制的代码,需要替换的变量使用<%# Eval("SellerName")%>;注意两侧的引号。
.aspx:
<asp:Repeater ID="SellerRpt" runat="server"> <ItemTemplate> <li><a href='<%# Eval("SellerName")%>' target="_blank"> <%# Eval("ComName")%></a></li> </ItemTemplate> </asp:Repeater>
对应的后台cs中,在页面加载处加入数据绑定的代码:
protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { DataTable dt = SellerDA.GetTopHotSellers(9); SellerRpt.DataSource = dt; SellerRpt.DataBind(); } }
aspx中"SellerName"、"ComName"为DataTable 中的列名。
优化
直接使用DataItem可减少Eval函数的执行步骤,优化页面解析时间:
<%# ((DataRowView)Container.DataItem)["SellerName"]%>替换<%# Eval("SellerName")%>
ArrayList数据源
如果数据源是ArrayList,并且ArrayList为一列string数组,则可不用写出列名:
.aspx:
<asp:Repeater ID="topAdHintRpt" runat="server"> <ItemTemplate> <asp:Label ID="BarLabel" CssClass="bar" runat="server" Text="|"></asp:Label> <a href="#"><span> <%#Container.DataItem%></span></a> </ItemTemplate> </asp:Repeater>
.cs:
ArrayList alterText; AdDA.GetIndexTopList(out alterText); topAdHintRpt.DataSource = alterText; topAdHintRpt.DataBind();
处理后显示
某些情况下,数据库中检索出来的数据并不适合直接显示出来,想要适当处理后显示(eg:日期的格式,字符串长度的控制),可使用标签来占位,在onitemdatabound函数中自行控制:
.aspx:
<asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="ProRpt_ItemDataBound"> <ItemTemplate> <asp:Label ID="colinDate" runat="server" Text=""></asp:Label> </ItemTemplate> </asp:Repeater>
.cs:
protected void ProRpt_ItemDataBound(object sender, RepeaterItemEventArgs e) { if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) { DataRowView rowv = (DataRowView)e.Item.DataItem;//找到分类Repeater关联的数据项 string strDate = rowv["clDate"].ToString(); Label DateLB = e.Item.FindControl("colinDate") as Label; DateLB.Text = strDate.Substring(0, 10); } }
嵌套Reapeter的显示
对于某些复杂的显示逻辑,需用用到Reapeter的嵌套,这里需要自行控制2层数据源的数据绑定:
.aspx:
<asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="ProRpt_ItemDataBound"> <ItemTemplate> <asp:Repeater ID="ParaRpt" runat="server" OnItemDataBound="ParaRpt_ItemDataBound"> <ItemTemplate> <asp:Label ID="bar" CssClass="bar" runat="server" Text="|"></asp:Label> <span class="para"> <%# Eval("Name")%>: <%# Eval("Value")%></span> </ItemTemplate> </asp:Repeater> </ItemTemplate> </asp:Repeater>
.cs:
protected void ProRpt_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("ParaRpt") as Repeater;//找到里层的repeater对象 DataRowView rowv = (DataRowView)e.Item.DataItem;//找到分类Repeater关联的数据项 string str = Convert.ToString(rowv["Pro_Content"]); //获取填充子类的内容 rep.DataSource = Product.FillPara(str); rep.DataBind(); } }
Over!
More:http://blog.donews.com/me1105/archive/2011/04/09/143.aspx