C# .NET 中继器 HeaderTemplate
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.NET Repeater HeaderTemplate
提问by Antony Delaney
Is there a way to access the field header name of a databound repeater within the header template. So insted of this....
有没有办法在标题模板中访问数据绑定转发器的字段标题名称。太喜欢这个了....
<HeaderTemplate>
<table >
<th ></th>
<th >Forename</th>
<th >Surname</th>
<th >work email</th>
<th ></th>
</HeaderTemplate>
We get something like this.
<HeaderTemplate>
<table >
<th ></th>
<th ><%# Eval("Forename").HeaderName%></th>
<th ><%# Eval("SureName").HeaderName%></th>
<th ><%# Eval("WorkEmail").HeaderName%></th>
<th ></th>
</HeaderTemplate>
采纳答案by Per Erik Stendahl
Trying to do Eval("Field").Propertyin the header template would throw a null exception.
尝试在标头模板中执行Eval("Field").Property会抛出空异常。
I would do something like this...
我会做这样的事情......
Code Behind
背后的代码
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
List<SomeData> data = new List<SomeData>();
data.Add(new SomeData("Bob"));
data.Add(new SomeData("Joe"));
Repeater1.DataSource = data;
Repeater1.DataBind();
}
public String FirstnameColumn {
get { return "Firstname"; }
}
}
public class SomeData
{
public String Firstname { get; set; }
public SomeData(String firstname) {
this.Firstname = firstname;
}
}
Markup
标记
<table>
<asp:Repeater ID="Repeater1" runat="server">
<HeaderTemplate>
<tr><td><%= FirstnameColumn %></td></tr>
</HeaderTemplate>
<ItemTemplate>
<tr><td><%# Eval("Firstname") %></td></tr>
</ItemTemplate>
</asp:Repeater>
</table>
回答by veggerby
You cannot use the <%# %>syntax in the HeaderTemplate because you it is not in a databinding scenario. You should however be able to use <%= %>and then put some method on your page/usercontrol that returns the Header.
您不能使用<%# %>HeaderTemplate 中的语法，因为它不在数据绑定方案中。但是，您应该能够使用<%= %>然后在返回页眉的页面/用户控件上放置一些方法。
回答by Per Erik Stendahl
You could move the table header into your ItemTemplate like this:
您可以像这样将表格标题移动到您的 ItemTemplate 中：
<ItemTemplate>
<asp:Panel runat="server" Visible='<%# Container.DisplayIndex == 0 %>'>
<tr>
<th><%# Eval("Forename").HeaderName %></th>
</tr>
</asp:Panel>
<tr>
<td><%# Eval("Forename") %></td>
</tr>
</ItemTemplate>
although this is slightly wasteful since the header would be bound for each row (only the first shown though). Perhaps it would be better to use <% if (...) %> instead of a Panel but I don't know how to access the Container.DisplayIndex in that context.
尽管这有点浪费，因为标题将绑定到每一行（尽管只显示了第一行）。也许使用 <% if (...) %> 而不是 Panel 会更好，但我不知道如何在该上下文中访问 Container.DisplayIndex 。
Edit:
编辑：
In .net 4.5 Container.DisplayIndexdoes not work; replace with Container.ItemIndex.
在 .net 4.5Container.DisplayIndex中不起作用；替换为Container.ItemIndex.
Full example:
完整示例：
<ItemTemplate>
<asp:Panel runat="server" Visible='<%# Container.ItemIndex == 0 %>'>
<tr>
<th><%# Eval("Forename").HeaderName %></th>
</tr>
</asp:Panel>
<tr>
<td><%# Eval("Forename") %></td>
</tr>
</ItemTemplate>
回答by Laki Politis
Why don't you use the Item Type already found in the RepeaterEvents?
为什么不使用已在 RepeaterEvents 中找到的项目类型？
protected void rptContent_DataBound(object Sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Header)
{
var x= e.Item.FindControl("xxx") as Label;
...
}
}
