ASP的ListView：如何访问一个数据绑定到行中的数据？ [英] ASP ListView: How do I access the data that is databound to the rows?

问题描述

我要访问处理列表视图事件，例如，当被数据绑定到我的列表视图中的数据：

I want to access the data that was databound to my list view when handling list view events such as:

protected void List_ItemDataBound(object sender, ListViewItemEventArgs e)

或

protected void List_ItemCommand(object sender, ListViewCommandEventArgs e)

事件里面，我无法访问通过财产以后的数据，如评估（ID）

目前我们使用的是非常哈克解决方案：

Currently we are using a very hacky solution:

string id = e.Item.FindControl("lblID").Text;

其中， lblID 是填充用的aspx文件数据隐藏控件：

Where lblID is a hidden control that is populated with data in the aspx file using:

<asp:Label ID="lblID" runat="server" Text='<%# Eval("ID") %>' />

当我看这我的眼睛流血，有没有更好的办法？

My eyes bleed when I look at this, Is there a better way?

推荐答案

一些调整，我发现了妥善解决后：

After a bit of tinkering I found the proper solution:

数据密钥需要被添加到列表视图。数据键不像一个数据绑定到一个列表视图中的数据持久化。要设置数据的关键只是在ListView标签中指定的名称：

Data keys need to be added to the list view. Data keys are persistent unlike the data that is databound to a listview. To set the data key just specify the name in the ListView tag:

<asp:ListView ID="MyListview" runat="server" DataKeyNames="ID" ...... 

然后从事件访问键：

Then to access the keys from the event:

protected void MyListView_ItemCommand(object sender, ListViewItemEventArgs e)
{
    // Get the item index of the Item
    int itemIndex = ((ListViewDataItem)e.Item).DisplayIndex;

    // Extract the key and cast it to its data type.
    DataKey key = ((ListView)sender).DataKeys[itemIndex];
    int myId = (int) key;

    // Use ID to delete / modify the item in the SQL database....
}

这篇关于ASP的ListView：如何访问一个数据绑定到行中的数据？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IT屋！