如何隐藏数据列表中的项目 [英] How to hide an item in datalist

问题描述

我想根据一些条件起诉 ItemBound ，怎么样？

I want to hide an item in datalist according to some condition suing ItemBound, how ?

推荐答案

环绕式的整个内容占位符控制的ItemTemplate 。

Wrap a PlaceHolder control around the entire content of the ItemTemplate.

然后在你的ItemDataBound事件，你可以这样做：

Then in your ItemDataBound event, you could do something like:

Protected Sub myDataList_ItemDataBound(sender As Object, e As System.Web.UI.WebControls.DataListItemEventArgs) Handles myDataList.ItemDataBound
    If Not Value = Value2 Then
       Ctype(e.Item.FindControl("myPlaceHolder"), PlaceHolder).Visible = False
    End If
End Sub

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有一个更好的方法（但是我已经没有机会来测试它），将使用 e.Item.Visible 来隐藏整个项目。这样没有HTML表格元素将呈现该项目。这也意味着没有占位符将不得不以复加。

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A better approach (however I've not had chance to test it), would be to hide the whole item using e.Item.Visible. This way no HTML table elements would be rendered for the item. It would also mean no PlaceHolder would have to be added.

Protected Sub myDataList_ItemDataBound(sender As Object, e As System.Web.UI.WebControls.DataListItemEventArgs) Handles myDataList.ItemDataBound
    If Not Value = Value2 Then
       e.Item.Visible = False
    End If
End Sub

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另外，如果您正在检查的值是从数据库源，可以筛选出的项目绑定之前：

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Alternatively, if the values you are checking are from a database source, you could filter the items out before binding:

WHERE Value=@Value2

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