为asp:ListView的Selected Item定义不同的背景色
本文关键字:定义 背景色 Item Selected asp ListView | 更新日期: 2023-09-27 17:58:30
我的应用程序有一个<asp:ListView>
。当选择一个项目时,我只想更改背景颜色,为所选项目提供焦点。
代码摘录:
<asp:ListView id="ordersList" runat="server"
InsertItemPosition="LastItem"
onpagepropertieschanged="ordersList_PagePropertiesChanged"
onitemdeleting="ordersList_ItemDeleting"
oniteminserting="ordersList_ItemInserting"
onitemupdating="ordersList_ItemUpdating"
onitemcanceling="ordersList_ItemCanceling"
onitemediting="ordersList_ItemEditing"
onitemdatabound="ordersList_ItemDataBound"
DataKeyNames="OrderID"
onselectedindexchanging="ordersList_SelectedIndexChanging">
<LayoutTemplate>
<asp:PlaceHolder runat="server" ID="itemPlaceholder"></asp:PlaceHolder>
</LayoutTemplate>
<ItemTemplate>
<div>
<asp:ImageButton ID="imgSelect" ImageUrl="~/img/bullet_go.png" runat="server"
CommandName="Select" ToolTip="select item" meta:resourcekey="imgSelectResource1"/>
<asp:ImageButton ID="imgEdit" ImageUrl="~/img/pencil.png" runat="server"
CommandName="Edit" ToolTip="edit item" meta:resourcekey="imgEditResource1"/>
<asp:ImageButton ID="imgDelete" ImageUrl="~/img/delete.png" runat="server"
CommandName="Delete" ToolTip="delete item" meta:resourcekey="imgDeleteResource1"/>
<!-- Fields goes here -->
<asp:Label ID="lblOrderId" Text='<%# Eval("OrderID") %>' runat="server" />
<asp:Label ID="lblCustomer" Text='<%# Eval("Customer.CompanyName") %>' runat="server" />
<asp:Label ID="lblEmployee" Text='<%# Eval("Employee.FullName") %>' runat="server" />
<asp:Label ID="lblOrderDate" Text='<%# Eval("OrderDate", "{0:d}") %>' runat="server" />
<asp:Label ID="lblRequiredDate" Text='<%# Eval("RequiredDate", "{0:d}") %>' runat="server" />
<asp:Label ID="lblShippedDate" Text='<%# Eval("ShippedDate", "{0:d}") %>' runat="server" />
<asp:Label ID="lblTotal" Text='<%# Eval("Total", "{0:N2}") %>' runat="server" />
</div>
</ItemTemplate>
<SelectedItemTemplate>
<div style="background-color:Navy; color:White; padding:0px;>
<asp:ImageButton ID="imgSelect" ImageUrl="~/img/bullet_go.png" runat="server"
CommandName="Select" ToolTip="select item" meta:resourcekey="imgSelectResource1"/>
<asp:ImageButton ID="imgEdit" ImageUrl="~/img/pencil.png" runat="server"
CommandName="Edit" ToolTip="edit item" meta:resourcekey="imgEditResource1"/>
<asp:ImageButton ID="imgDelete" ImageUrl="~/img/delete.png" runat="server"
CommandName="Delete" ToolTip="delete item" meta:resourcekey="imgDeleteResource1"/>
<!-- Fields goes here -->
<asp:Label ID="lblOrderId" Text='<%# Eval("OrderID") %>' runat="server" />
<asp:Label ID="lblCustomer" Text='<%# Eval("Customer.CompanyName") %>' runat="server" />
<asp:Label ID="lblEmployee" Text='<%# Eval("Employee.FullName") %>' runat="server" />
<asp:Label ID="lblOrderDate" Text='<%# Eval("OrderDate", "{0:d}") %>' runat="server" />
<asp:Label ID="lblRequiredDate" Text='<%# Eval("RequiredDate", "{0:d}") %>' runat="server" />
<asp:Label ID="lblShippedDate" Text='<%# Eval("ShippedDate", "{0:d}") %>' runat="server" />
<asp:Label ID="lblTotal" Text='<%# Eval("Total", "{0:N2}") %>' runat="server" />
</div>
</SelectedItemTemplate>
</asp:ListView>
问题是:
我在<SelectedItemTemplate>
中复制<ItemTemplate>
的代码,只是更改<div>
的样式。问题是,这会生成大量冗余代码:尽管我只是想更改背景样式,但我会重新复制所有字段。
这是实现这一目标的最佳方法,或者有人能建议一个更好的方法吗?
谢谢!
在ordersList_ItemDataBound事件中,您可以检查当前项目索引是否等于所选列表索引,如下所示:
if (((ListView)sender).SelectedIndex == e.Item.DisplayIndex)
如果是这样的话,您可以将样式添加到div中,但要在服务器端获得div,您必须使div在服务器上运行,并为其分配一个id,比如:
<div runat="server" id="area">
最后的代码看起来是这样的:
if (((ListView)sender).SelectedIndex == e.Item.DisplayIndex)
{
var ctrl = (HtmlContainerControl)e.Item.FindControl("area");
ctrl.Attributes["style"] = "background-color:Navy; color:White; padding:0px;";
}