C# C.net中的动态中继器

我正在尝试使用ITemplate动态创建嵌套的中继器。这个中继器就像我传递列表一样，它生成中继器。问题是，当我对外部中继器进行数据绑定时。仅显示最后一个嵌套的中继器。下面是屏幕截图。

加价

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您需要为parentRpt.ItemDataBound事件编写处理程序，并设置childRpt的DataSource属性，然后从那里调用child.Rpt.DataBind。

为什么不创建生成自定义控件并用代码填充它呢

override CreateChildControls(){  

    foreach(var r in rows)
    {
    ...
    }
}

模板、重新创建器等只是为了提高设计的时效性，在您手动构建所有模板的情况下，我看不出为什么会过度复杂地使用占位符、模板等

只需构建CompositeControl并用代码填充它。您将两次减少代码，并且您将拥有可读性最好的代码。避免恶意事件连接子重新创建器数据源属性

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对不起，太硬了…

好了，伙计们，我知道了。。。。谢谢大家。我犯了个错误。模板类是错误的。我修复了它，现在它工作得很好 下面是课堂

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据我所知，对数据绑定的调用是分层的。我的意思是调用parent将导致所有子控件按原样进行数据绑定。这就是正在发生的事情。否则，即使最后一行也不会出现。这可能是一个解决方案。但是，这个问题是整个问题的小部分。我想做的是生成嵌套的rpts frm xml。Tht xml实际上是我们公司定义的一个标准，用于验证中继器内的控件。我正在尝试生成UI来测试这些规则。所以，我不得不使用rpts。这是我第一次讨论堆栈溢出。所以我想我不能再评论了。这就是我使用聊天语言的原因。对不起。

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

public partial class Restricted_Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        CreateNestedRepeater();
    }

    private void CreateNestedRepeater()
    {
        Repeater childRpt = new Repeater();
        List repeatingRuleControls = new List();
        repeatingRuleControls.Add(new TextBox());
        repeatingRuleControls.Add(new TextBox());
        repeatingRuleControls.Add(new TextBox());
        RepeatingRuleTemplate repeatingRuleTemplate = new RepeatingRuleTemplate(ListItemType.Item, repeatingRuleControls);
        childRpt.HeaderTemplate = new RepeatingRuleTemplate(ListItemType.Header, repeatingRuleControls);
        childRpt.ItemTemplate = repeatingRuleTemplate;
        childRpt.FooterTemplate = new RepeatingRuleTemplate(ListItemType.Footer, null);
        childRpt.DataSource = new DataRow[4];

        Repeater parentRpt = new Repeater();
        repeatingRuleControls = new List();
        repeatingRuleControls.Add(new TextBox());
        repeatingRuleControls.Add(new TextBox());
        repeatingRuleControls.Add(new TextBox());
        repeatingRuleControls.Add(childRpt);
        RepeatingRuleTemplate parentrepeatingRuleTemplate = new RepeatingRuleTemplate(ListItemType.Item, repeatingRuleControls);
        parentRpt.HeaderTemplate = new RepeatingRuleTemplate(ListItemType.Header, repeatingRuleControls);
        parentRpt.ItemTemplate = parentrepeatingRuleTemplate;
        parentRpt.FooterTemplate = new RepeatingRuleTemplate(ListItemType.Footer, null);
        parentRpt.DataSource = new DataRow[4];
        parentRpt.DataBind();
        phControls.Controls.Add(parentRpt);
    }

    public class RepeatingRuleTemplate : ITemplate
    {
        ListItemType templateType;
        List innerControls;

        public RepeatingRuleTemplate(ListItemType type, List controls)
        {
            templateType = type;
            innerControls = controls;
        }



        public void InstantiateIn(Control container)
        {
            PlaceHolder ph = new PlaceHolder();

            switch (templateType)
            {
                case ListItemType.Header:
                    ph.Controls.Add(new LiteralControl(""));
                    ph.Controls.Add(new LiteralControl(""));
                    foreach (Control control in innerControls)
                    {
                        Label label = new Label();
                        label.Text = control.ID;
                        ph.Controls.Add(new LiteralControl(""));
                        ph.Controls.Add(label);
                        ph.Controls.Add(new LiteralControl(""));
                    }
                    ph.Controls.Add(new LiteralControl(""));
                    break;
                case ListItemType.Item:
                    ph.Controls.Add(new LiteralControl(""));

                    foreach (Control control in innerControls)
                    {
                        if (control.GetType() != typeof(Repeater))
                        {
                            ph.Controls.Add(new LiteralControl(""));
                            TextBox textBox = new TextBox();
                            textBox.ID = control.ID;
                            ph.Controls.Add(textBox);
                            ph.Controls.Add(new LiteralControl(""));
                        }
                        else
                        {
                            ph.Controls.Add(new LiteralControl(""));
                            ph.Controls.Add(control as Repeater);
                            //(control as Repeater).DataSource = new DataRow[4];
                            //   (control as Repeater).DataBind();
                            ph.Controls.Add(new LiteralControl(""));
                        }
                    }
                    ph.Controls.Add(new LiteralControl(""));
                    //ph.DataBinding += new EventHandler(Item_DataBinding);
                    break;
                case ListItemType.Footer:
                    ph.Controls.Add(new LiteralControl(""));
                    break;
            }
            container.Controls.Add(ph);
        }



        public List Controls
        {
            get
            {
                return innerControls;
            }
        }

    }
}

override CreateChildControls(){  

    foreach(var r in rows)
    {
    ...
    }
}

public class RepeatingRuleTemplate : ITemplate
    {
        ListItemType templateType;
        List innerControls;


    public RepeatingRuleTemplate(ListItemType type, List<Control> controls)
    {
        templateType = type;
        innerControls = controls;
    }



    public void InstantiateIn(Control container)
    {
        PlaceHolder ph = new PlaceHolder();

        switch (templateType)
        {
            case ListItemType.Header:
                ph.Controls.Add(new LiteralControl("<table border=\"0\">"));
                ph.Controls.Add(new LiteralControl("<tr>"));
                foreach (Control control in innerControls)
                {
                    Label label = new Label();
                    label.Text = control.ID;
                    ph.Controls.Add(new LiteralControl("<td>"));
                    ph.Controls.Add(label);
                    ph.Controls.Add(new LiteralControl("</td>"));
                }
                ph.Controls.Add(new LiteralControl("</tr>"));
                break;
            case ListItemType.Item:
                ph.Controls.Add(new LiteralControl("<tr>"));

                foreach (Control control in innerControls)
                {
                        //ph.Controls.Add(new LiteralControl("<td>"));
                        //ph.Controls.Add(control as TextBox);
                        //ph.Controls.Add(new LiteralControl("</td>"));
                    if (control.GetType() != typeof(Repeater))
                    {
                        ph.Controls.Add(new LiteralControl("<td>"));
                        TextBox textBox = new TextBox();
                        textBox.ID = control.ID;
                        ph.Controls.Add(textBox);
                        ph.Controls.Add(new LiteralControl("</td>"));
                    }
                    else
                    {
                        ph.Controls.Add(new LiteralControl("<td>"));
                        Repeater rpt = new Repeater();
                        rpt.DataSource = (control as Repeater).DataSource;
                        rpt.ItemTemplate = (control as Repeater).ItemTemplate;
                        rpt.HeaderTemplate = (control as Repeater).HeaderTemplate;
                        rpt.FooterTemplate = (control as Repeater).FooterTemplate;
                        rpt.DataBind();
                        ph.Controls.Add(rpt);
                        //(control as Repeater).DataSource = new DataRow[4];
                        //   (control as Repeater).DataBind();
                        ph.Controls.Add(new LiteralControl("</td>"));
                    }
                }
                ph.Controls.Add(new LiteralControl("</tr>"));
                //ph.DataBinding += new EventHandler(Item_DataBinding);
                break;
            case ListItemType.Footer:
                ph.Controls.Add(new LiteralControl("</table>"));
                break;
        }
        container.Controls.Add(ph);
    }



    public List<Control> Controls
    {
        get
        {
            return innerControls;
        }
    }

}