日期:2014-05-17  浏览次数:20598 次

在aspx页怎么引用自己写的类?进来帮看看啊
我在app_code文件夹中写了一个类,在aspx页怎么无法调用,提示:编译器错误消息: CS0103: 当前上下文中不存在名称“Link”,类代码如下:
C# code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebApplication1.App_Code
{
    /// <summary>
    /// 连接工厂类
    /// </summary>
    public class Link
    {
        //构建绝对URL
        private static string BuildAbsolute(string relativeUri)
        { 
        //获取当前URL
            Uri uri = HttpContext.Current.Request.Url;
            //构建绝对路径
            string app = HttpContext.Current.Request.ApplicationPath;
            if (!app.EndsWith("/"))
            {
                app += "/";
            }
            relativeUri = relativeUri.TrimStart('/');
            //返回绝对路径
            return HttpUtility.UrlPathEncode(string.Format("http://{0}:{1}{2}{3}",uri.Host,uri.Port,app,relativeUri));
        }
        //生成一个门类url
        public static string ToDepartment(string departmentId, string page)
        {
            if (page=="1")
            {
                return BuildAbsolute(string.Format("Catalog.aspx?DepartmentId={0}",departmentId));
            }
            else
            {
                return BuildAbsolute(string.Format("Catalog.aspx?DepartmentId={0}&Page={1}",departmentId,page));
            }
        }
        //为首页生成一个门类URL
        public static string ToDepartment(string departmentId)
        {
            return ToDepartment(departmentId,"1");
        }
    }
}

aspx页代码如下:
HTML code

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>

<!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></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <asp:DataList ID="List" runat="server" CssClass="DepartmentList" Width="200px">
    <HeaderStyle CssClass="DepartmentListHead" />
    <HeaderTemplate>
        选择一个
    </HeaderTemplate>
    <ItemTemplate>
        <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%# Link.ToDepartment(Eval("DepartmentID").ToString())%>' Text='<%# HttpUtility.HtmlEncode(Eval("Name").ToString()) %>' ToolTip='<%# HttpUtility.HtmlEncode(Eval("Description").ToString()) %>' CssClass='<%# Eval("DepartmentID").ToString()==Request.QueryString["DepartmentID"]?"DepartmentSelected" :"DepartmentUnselected" %>'></asp:HyperLink>
    </ItemTemplate>
</asp:DataList>
    </div>
    </form>
</body>
</html>




------解决方案--------------------
<ItemTemplate>
<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%# Link.ToDepartment(Eval("DepartmentID").ToString())%>' Text='<%# HttpUtility.HtmlEncode(Eval("Name").ToString()) %>' ToolTip='<%# HttpUtility.HtmlEncode(Eval("Description").ToString()) %>' CssClass='<%# Eval("DepartmentID").ToString()==Request.QueryString["DepartmentID"]?"DepartmentSelected" :"DepartmentUnselected" %>'></asp:HyperLink>
</ItemTempl