转发器在哪里获取数据绑定项？

Question

I am having a look at databinding for the first time. I understand that the databound elements are put in the aspx file between <%# and %>. I also understand that a Repeater class is used. Like so:

<asp:Repeater ID="gvEvents" runat="server">
    <ItemTemplate>
        <div class="eventLogItem">
            <h1><%# Eval("Event")%></h1>
            <time><%# Eval("Timestamp")%></time><small><%# Eval("User")%></small>
            <span class="nav">mouseover to view comments</span>
            <textarea disabled="disabled"><%# Eval("Comments") %></textarea>
        </div>
    </ItemTemplate>
    <SeparatorTemplate>
        <hr />
    </SeparatorTemplate>
</asp:Repeater> `

But where would the aspx code get "Event", "Timestamp" and "User" and "Comments"? There does not seem to be something clear in the code-behind file. What am I missing?

Answer 1

In your code behind you would set the DataSource property of the repeater to some collection of object in which each of those objects contains a property named Event , Timestamp , User , and Comments . If you don't assign a data source, then there won't be anything for the repeater to display. If any of the bound items is missing one of those properties, you'll get an error at runtime.

Answer 2

查看gvEvents.DataSource = ...后面的代码，这就是为转发器类的数据绑定调用数据库的方式