多层try catch嵌套_方法嵌套一般不超过多少层

2022-11-07 15:21:57 浏览数 (1)

先是aspx页面

<asp:Repeater ID=”rp” runat=”server”> <ItemTemplate> <%# Eval(“id”) %> <asp:Repeater ID=”rp1″ runat=”server” DataSource='<%# GetData(Eval(“id”)) %>’> <ItemTemplate> <%# Eval(“name”) %><br /> </ItemTemplate> </asp:Repeater> <br /> </ItemTemplate> </asp:Repeater>

其中关键是<asp:Repeater ID=”rp1″ runat=”server” DataSource='<%# GetData(Eval(“id”)) %>’> GetData是一个自义函数,原型如下:

protected DataTable GetData(object obj) { DataTable dt = new DataTable(); //这里做一些事情 return dt; }

完整的代码如下:aspx

<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”test.aspx.cs” Inherits=”test” %> <%@ Import Namespace=”System.Data” %>

<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>

<html xmlns=”http://www.w3.org/1999/xhtml” > <head runat=”server”> <title>nid’s blog http://www.ljnid.cn</title> </head> <body> <form id=”form1″ runat=”server”> <div> <asp:Repeater ID=”rp” runat=”server”> <ItemTemplate> <%# Eval(“id”) %> <asp:Repeater ID=”rp1″ runat=”server” DataSource='<%# GetData(Eval(“id”)) %>’> <ItemTemplate> <%# Eval(“name”) %><br /> </ItemTemplate> </asp:Repeater> <br /> </ItemTemplate> </asp:Repeater> </div> </form> </body> </html>

aspx.cs文件

using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls;

public partial class test : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { DataTable dt = new DataTable(); dt.Columns.Add(“id”); for (int i = 0; i < 4; i ) { DataRow dr = dt.NewRow(); dr[“id”] = i; dt.Rows.Add(dr); }

rp.DataSource = dt; rp.DataBind(); } protected DataTable GetData(object obj) { DataTable dt = new DataTable(); dt.Columns.Add(“name”); for (int i = 0; i < 10; i ) { DataRow dr = dt.NewRow(); dr[“name”] = “name_” obj “_” i; dt.Rows.Add(dr); } return dt; } }

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