如何检索同一行中的ListView项的值作为一个LinkBut​​ton [英] How to retrieve the value of a ListView item in the same row as a LinkButton

问题描述

我有这显示一组群体，从数据库中检索动态生成的ListView。 ListView控件模板看起来是这样的：

I have a dynamically generated ListView which displays a set of groups, retrieved from a database. The ListView template looks like this:

<asp:ListView ID="lvGroups" runat="server">
        <ItemTemplate>
            <tr>
                <td>
                    <asp:Label ID="lblGroupName" runat="server" Text='<%# Eval("GroupName") %>' />
                </td>
                <td>
                    <asp:LinkButton ID="lnkRemove" runat="server" Text="Remove" OnClick="lnkGroupRemove" OnClientClick="Confirm()" />
                </td>
            </tr>

        </ItemTemplate>
    </asp:ListView>

正如你所看到的，有一个价值，它是从数据库中抽取，然后一个LinkBut​​ton用于去除值。当点击LinkBut​​ton的，它会显示一个JavaScript确认信息，如果您单击是在该消息，那么具体的条目将被从数据库中删除。

As you can see, there is a value, which is pulled from a database, and then a linkbutton for removing that value. When the linkbutton is clicked, it displays a javascript confirmation message, and if you click Yes on that message, then that specific entry will be removed from the database.

不幸的是我不能简单地删除组名，其中ID =行号，因为你既可以添加和删除组，这样就会很快变得不一致。

Unfortunately I cannot simply remove the GroupName where the ID = row number, because you can both add and remove groups, so that will quickly become inconsistent.

我所真正需要的是检索来自同一行被点击，如果我能想出​​如何做到这一点的话，我可以轻松地配置数据库查询成功删除条目的LinkBut​​ton的的组名的方式。如果您有其他解决方案，但是，这也很大。

All I truly need is a way to retrieve the GroupName from the same row as the linkbutton that was clicked, if I can figure out how to do that, then I can easily configure a database query to successfully remove the entry. If you have another solution, however, that is also great.

我很伤心地说，我没有例如code为 lnkGrou premove 事件，因为我根本不知道从哪里开始这一问题。

I'm sad to say that I have no example code for the lnkGroupRemove event, as I simply have no clue where to start on this problem.

在这个问题上的任何帮助将非常AP preciated！

Any help on this subject would be much appreciated!

推荐答案

您可以使用的DataKeyNames 属性：

<asp:ListView ID="lvGroups" runat="server" DataKeyNames="ID,GroupName" >

和这种方式获得的价值在code-背后：

and get the value this way in code-behind:

protected void lnkGroupRemove(object sender, EventArgs e)
{
    ListViewItem item = (sender as LinkButton).NamingContainer as ListViewItem;
    int ID = (int)lvGroups.DataKeys[item.DataItemIndex].Values["ID"];
    string groupName = (string)lvGroups.DataKeys[item.DataItemIndex].Values["GroupName"];
}

我添加了一个ID值，表明附加字段可以被添加到的DataKeyNames 和code-后面，包括在数据源字段，但检索不显示在ListView。

I added an ID value to show that additional fields can be added to DataKeyNames and retrieved from code-behind, including fields that are in the data source but not displayed in the ListView.

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