以下是我测试原始问题的方法

Question

我在转发器中有一个UserControl。转发器的数据源来自SQL Server。

用户控件的.cs - MoviePanel.ascx.cs：

public int myMovieID { get; set; }
public string myMovieName { get; set; }
public string myMovieDescription { get; set; }

protected void Page_Load(object sender, EventArgs e)
{
   MovieIDLbl.Text = myMovieID.ToString();
   MovieNameLbl.Text = myMovieName;
   DescriptionLbl.Text = myMovieDescription;
}

ASPX页面：

<asp:Repeater ID="Repeater1" DataSourceID="ListOfMoviesDS" runat="server">
    <ItemTemplate>
        <uc1:MovieDetailPanel runat="server" myMovieID='<%# Eval("MovieID") %>' 
           myMovieName='<%# Eval("movieName") %>' 
                myMovieDescription='<%# Eval("movieDescription") %>' 
                id="MovieDetailPanel1" />

        <asp:Label ID="Label1" runat="server" 
              Text='<%# Eval("MovieID") %>'></asp:Label>
        <asp:Label ID="Label2" runat="server" 
              Text='<%# Eval("movieName") %>'></asp:Label>
        <asp:Label ID="Label3" runat="server" 
             Text='<%# Eval("movieDescription") %>'></asp:Label>
    </ItemTemplate>
</asp:Repeater>

这里发生了一件非常奇怪的事。值未传递给UserControl。但是，如果我将标签放在用户控件下面并使用Eval()设置文本，则可以正常工作。您可能认为用户控件可能是问题所在。但是，如果我手动输入内容，请代替<%# Eval("movieName") %>，它会传递给用户控件并显示。

我没有CLUE！如果问题出在Eval（）标签上也不应该得到文本。或者，如果问题出在UserControl上，我的手册文本不应该通过。我不知道为什么Eval（）的值没有达到UserControl。

Answer 1

您的代码运行正常;我测试了它（参见页面底部）。最糟糕的情况是你可以尝试在ItemDataBound事件中分配这些值。

<asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="Repeater1_ItemDataBound">
    <ItemTemplate>
        <uc1:MoviePanel runat="server" id="MovieDetailPanel1" />
    </ItemTemplate>
</asp:Repeater>

public class Movie
{
    public int MovieID { get; set; }
    public string MovieName { get; set; }
    public string MovieDescription { get; set; }
}

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        Repeater1.DataSource = new List<Movie>
        {
            new Movie {MovieID = 1, MovieName = "One", MovieDescription = "One hundred"},
            new Movie {MovieID = 2, MovieName = "Two", MovieDescription = "Two hundreds"},
            new Movie {MovieID= 3, MovieName = "Three", MovieDescription = "Three hundreds"},
        };
        Repeater1.DataBind();
    }
}

protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item ||
        e.Item.ItemType == ListItemType.AlternatingItem)
    {
        var movie = e.Item.DataItem as Movie;

        var control = e.Item.FindControl("MovieDetailPanel1") as MoviePanel;
        control.myMovieID = movie.MovieID;
        control.myMovieDescription = movie.MovieDescription;
        control.myMovieName = movie.MovieName;
    }
}

enter image description here

以下是我测试原始问题的方法

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebDemo.WebForm1" %>

<%@ Register src="MoviePanel.ascx" tagname="MoviePanel" tagprefix="uc1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:Repeater ID="Repeater1" runat="server">
            <ItemTemplate>
                <uc1:MoviePanel runat="server" mymovieid='<% #Eval("MovieID") %>'
                    mymoviename='<% #Eval("movieName") %>'
                    mymoviedescription='<% #Eval("movieDescription") %>'
                    id="MovieDetailPanel1" />
            </ItemTemplate>
        </asp:Repeater>
    </form>
</body>
</html>


namespace WebDemo
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        public class Movie
        {
            public int MovieID { get; set; }
            public string MovieName { get; set; }
            public string MovieDescription { get; set; }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                Repeater1.DataSource = new List<Movie>
                {
                    new Movie {MovieID = 1, MovieName = "One", MovieDescription = "One hundred"},
                    new Movie {MovieID = 2, MovieName = "Two", MovieDescription = "Two hundreds"},
                    new Movie {MovieID= 3, MovieName = "Three", MovieDescription = "Three hundreds"},
                };
                Repeater1.DataBind();
            }
        }
    }
}

<%@ Control Language="C#" AutoEventWireup="true"
    CodeBehind="MoviePanel.ascx.cs" Inherits="WebDemo.MoviePanel" %>

<p>
    <strong>Inside Control</strong>:
    <asp:Label ID="MovieIDLbl" runat="server" />
    <asp:Label ID="MovieNameLbl" runat="server" />
    <asp:Label ID="DescriptionLbl" runat="server" />
</p>

namespace WebDemo
{
    public partial class MoviePanel : System.Web.UI.UserControl
    {
        public int myMovieID { get; set; }
        public string myMovieName { get; set; }
        public string myMovieDescription { get; set; }

        protected void Page_Load(object sender, EventArgs e)
        {
            MovieIDLbl.Text = myMovieID.ToString();
            MovieNameLbl.Text = myMovieName;
            DescriptionLbl.Text = myMovieDescription;
        }
    }
}

Answer 2

这是一种方法，在后面的代码中完成所有操作。我不能说这是最好的做法，但它很干净。您使用ItemDataBind事件，将项目转换为您想要的，数据表，等等，然后创建用户控件的新实例并将其添加到转发器的控件集合

页面来源

public partial class _Default : Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        var myList = new List<string>() { "one", "two", "three" };
        myRepeater.DataSource = myList;
        myRepeater.DataBind();
    }

    public void R1_ItemDataBound(Object Sender, RepeaterItemEventArgs e)
    {
        var items = (string)e.Item.DataItem;
        var newcontrol = (WebUserControl1)Page.LoadControl("~/WebUserControl1.ascx");
        newcontrol.myTest = items;
        myRepeater.Controls.Add(newcontrol);           
    }   
}

Page html

 <asp:Repeater ID="myRepeater"  runat="server" OnItemDataBound="R1_ItemDataBound">
    <ItemTemplate>

    </ItemTemplate>
</asp:Repeater>

用户控制

<h1 id="myLabel" runat="server"></h1>

和

public partial class WebUserControl1 : System.Web.UI.UserControl
{
    public string myTest { get; set; }
    protected void Page_Load(object sender, EventArgs e)
    {
        myLabel.InnerText = myTest;
    }
}

用户控制在中继器内

2 个答案:

以下是我测试原始问题的方法