asp.net - 如何向中继器内的用户控件提供 'data'？

Question

有人可以解释向 提供数据的最简单方法吗？用户 中继器内部的控制？

我有以下内容:

默认.aspx

<!-- this.GetData() returns IEnumerable<Object> -->
<asp:Repeater runat="server" datasource='<%#this.GetData()%>'>
    <ItemTemplate>
        <my:CustomControl runat="server" datasource='<%#Container.DataItem %>
    </ItemTemplate>
</asp:Repeater>

代码隐藏

    protected void Page_Load(object sender, EventArgs e)
    {
        this.DataBind();
    }

自定义控件.ascx

<!-- Object has property Title -->
<h1><%#this.DataSource.Title%></h1>

代码隐藏:

[System.ComponentModel.DefaultBindingProperty("DataSource")]
public partial class CustomControl : System.Web.UI.UserControl
{
    public Item DataSource { get; set; }

    protected void Page_Load(object sender, EventArgs e)
    {
        var x = this.DataSource; //null here
    }

    protected void Page_PreRender(object sender, EventArgs e)
    {
        var x = this.DataSource; //still null
    }
}

Answer 1

您可以向用户控件添加属性，然后在数据绑定(bind)期间设置这些属性。

像这样:

<!-- this.GetData() returns IEnumerable<Object> -->
<asp:Repeater runat="server" datasource='<%#this.GetData()%>'>
    <ItemTemplate>
        <my:CustomControl runat="server" title='<%#Container.DataItem.title %>
    </ItemTemplate>
</asp:Repeater>

代码隐藏

protected void Page_Load(object sender, EventArgs e)
{
    this.DataBind();
}

自定义控件.ascx

<!-- Object has property Title -->
<h1><%#this.Title%></h1>

代码隐藏:

[System.ComponentModel.DefaultBindingProperty("DataSource")]
public partial class CustomControl : System.Web.UI.UserControl
{
    public Item DataSource { get; set; }

    public string title { get; set; }

    protected void Page_Load(object sender, EventArgs e)
    {
        var x = this.DataSource; //null here
    }

    protected void Page_PreRender(object sender, EventArgs e)
    {
        var x = this.DataSource; //still null
     }
}