多层try catch嵌套_方法嵌套一般不超过多少层

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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;

}

}