如何在渲染时间中获取C#ASP.NET ListView中当前记录的索引

问题描述

我有一个如下列表视图:

I have a list view like below:

<asp:ListView ID="lstTopRanks" runat="server">
    <ItemTemplate>
        <div class="Amazing-{recordNumber}">{itemdata}</div>
    </ItemTemplate>
</asp:ListView>

我想用运行中的计数器替换 {recordNumber} ，这样显示的第一条记录为1，第二条记录为2，依此类推.

I would like to replace {recordNumber} with a running counter so the first record shown have 1 the second will be 2 and so on.

我该怎么做?

预先感谢

推荐答案

如果ID不是，则可以使用 Container.DisplayIndex 或 Container.DataItemIndex 来自例如数据库.

You can do it with Container.DisplayIndex, or Container.DataItemIndex, if the ID is not coming from for example a database.

关键是这样: class ="Amazing-<％#Container.DisplayIndex + 1％>" .

如果 recordNumber 确实来自外部数据源，则您也可以像这样进行操作: class ='Amazing-<％#Eval("YourDatabaseIDColumn")％>'.

If recordNumber does come from an external datasource, you can do that as well like this: class='Amazing-<%# Eval("YourDatabaseIDColumn") %>'.

DisplayIndex和DataItemIndex不同.DisplayIndex是始终从当前页面开始的运行索引，而DataItemIndex是整个数据源中的运行编号.

DisplayIndex and DataItemIndex differ if you are paging your datasource. DisplayIndex is a running index always starting on the current page, and DataItemIndex is a running number in your whole datasource.

这里是一个例子:

//just to represent something like a db table with an ID and a description
Pair[] data = new Pair[] { new Pair(123, "row1"), new Pair(124, "row2"), new Pair(125, "row3"), new Pair(126, "row4"), new Pair(127, "row5"), new Pair(128, "row6"), new Pair(129, "row7"), new Pair(130, "row8"), new Pair(131, "row9"), new Pair(132, "row10") };

lstTopRanks.DataSource = data;
lstTopRanks.DataBind();

ASPX:

  <asp:ListView ID="lstTopRanks" runat="server">
     <LayoutTemplate><asp:PlaceHolder ID="ItemPlaceHolder" runat="server"></asp:PlaceHolder></LayoutTemplate>
     <ItemTemplate>
        <div class="Amazing-<%#Container.DisplayIndex + 1 %>">
           DisplayIndex: <b><%#Container.DisplayIndex %></b>;
           DataItemIndex: <b><%#Container.DataItemIndex %></b>, 
           ID and Text: <i><%#((Pair)Container.DataItem).First %>, <%#((Pair)Container.DataItem).Second %></i>
        </div>
     </ItemTemplate>
  </asp:ListView>

  <asp:DataPager ID="DataPagerProducts" runat="server" PagedControlID="lstTopRanks" PageSize="3" >
     <Fields>
        <asp:NextPreviousPagerField ShowFirstPageButton="True" ShowNextPageButton="False" />
        <asp:NumericPagerField />
        <asp:NextPreviousPagerField ShowLastPageButton="True" ShowPreviousPageButton="False" />
     </Fields>
  </asp:DataPager>

结果:

这篇关于如何在渲染时间中获取C#ASP.NET ListView中当前记录的索引的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！