asp.net 6.aspx页面

1.aspx页面的头部

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="UserInfoList.aspx.cs"  
    Inherits="CZBK.ItcastProject.WebApp.aspx_Demo.UserInfoList" %>
<%@ Import Namespace="CZBK.ItcastProject.Model" %>

**<%@ Page %>:页面本身也是一个对象,继承自Page,而<%@ Page %> 就是设置这个对象的属性用的。

**Language:C#语言

**AutoEventWireup:启动页面事件

**CodeBehind:代码后置,代码分离

**Inherits:继承。 aspx文件会生成一个(子类)类继承于 aspx.cs文件生成的(父类)类。

**<%@ Import Namespace="CZBK.ItcastProject.Model" %>:引用命名空间

2.aspx 和 aspx.cs

aspx文件会生成一个子类,aspx.cs文件会生成一个父类。aspx继承于aspx.cs

*在aspx.cs文件中生成一个公共属性,aspx文件可以访问到!

*在aspx.cs页面中使用C#代码,引用命名空间:<%@ Import Namespace="CZBK.ItcastProject.Model" %>;然后<%=  %> 编写C#代码,‘=’ 是response.write

UserInfoList.aspx.cs

using CZBK.ItcastProject.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace CZBK.ItcastProject.WebApp.aspx_Demo
{
    public partial class UserInfoList : System.Web.UI.Page
    {
        public string StrHtml { get; set; }
        public List<UserInfo> UserList { get; set; }

        /// <summary>
        /// 页面加载完成以后。Load事件  Form_Load
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Page_Load(object sender, EventArgs e)
        {

        }
    }
}

UserInfoList.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="UserInfoList.aspx.cs"  Inherits="CZBK.ItcastProject.WebApp.aspx_Demo.UserInfoList" %>
<%@ Import Namespace="CZBK.ItcastProject.Model" %>
<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
    <link href="../Css/tableStyle.css" rel="stylesheet" />
</head>
<body>
    <form id="form1" runat="server">
    <div>
     <table> <tr><th>编号</th><th>用户名</th><th>密码</th><th>邮箱</th><th>时间</th><th>删除</th><th>详细</th><th>编辑</th></tr>
            <%=StrHtml%>
            <% foreach(UserInfo userInfo in UserList){%>
            <tr>
                <td><%=userInfo.Id %></td>
                   <td><%=userInfo.UserName %></td>
                   <td><%=userInfo.UserPass %></td>
                   <td><%=userInfo.Email %></td>
                   <td><%=userInfo.RegTime.ToShortDateString() %></td>
                <td><a href="Delete.ashx?id=<%=userInfo.Id %>" class="deletes">删除</a></td>
                <td>详细</td>
                <td><a href="EditUser.aspx?id=<%=userInfo.Id %>">编辑</a> </td>
            </tr>

            <%} %>
        </table>
        <hr />
    </div>
    </form>
</body>
</html>

3.Page_Load 方法 

*页面加载完成触发(服务端的)

*aspx.cs中的 Page_Load 方法比aspx中的  window.onload = function () {} 方法要先执行!

4.aspx列表展示数据

UserInfoList.aspx:

1.引用命名空间

2.遍历父类的userInfo(list集合) 公共属性,循环生成一行tr

3.注意html代码可以结合C#代码编写在aspx中

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="UserInfoList.aspx.cs"  Inherits="CZBK.ItcastProject.WebApp.aspx_Demo.UserInfoList" %>
<%@ Import Namespace="CZBK.ItcastProject.Model" %>
<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
    <link href="../Css/tableStyle.css" rel="stylesheet" />
</head>
<body>
    <form id="form1" runat="server">
    <div>
     <table> <tr><th>编号</th><th>用户名</th><th>密码</th><th>邮箱</th><th>时间</th><th>删除</th><th>详细</th><th>编辑</th></tr>
            <% foreach(UserInfo userInfo in UserList){%>
            <tr>
                <td><%=userInfo.Id %></td>
                   <td><%=userInfo.UserName %></td>
                   <td><%=userInfo.UserPass %></td>
                   <td><%=userInfo.Email %></td>
                   <td><%=userInfo.RegTime.ToShortDateString() %></td>
                <td><a href="Delete.ashx?id=<%=userInfo.Id %>" class="deletes">删除</a></td>
                <td>详细</td>
                <td><a href="EditUser.aspx?id=<%=userInfo.Id %>">编辑</a> </td>
            </tr>
            <%} %>
        </table>
        <hr />
    </div>
    </form>
</body>
</html>

 UserInfoList.aspx.cs

1.定义公共属性,以便子类访问

2.调用业务层的方法

using CZBK.ItcastProject.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace CZBK.ItcastProject.WebApp.aspx_Demo
{
    public partial class UserInfoList : System.Web.UI.Page
    {
        public string StrHtml { get; set; }
        public List<UserInfo> UserList { get; set; }

        /// <summary>
        /// 页面加载完成以后。Load事件  Form_Load
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Page_Load(object sender, EventArgs e)
        {
            BLL.UserInfoService UserInfoService = new BLL.UserInfoService();
            List<UserInfo> list = UserInfoService.GetList();
            UserList = list;
        }
    }
}

5.删除数据

采用一般处理程序,因为删除不需要展示复杂的页面,这里用一般处理程序比aspx方便。

前台的删除代码

<td><a href="Delete.ashx?id=<%=userInfo.Id %>" class="deletes">删除</a></td>

Delete.ashx

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace CZBK.ItcastProject.WebApp.aspx_Demo
{
    /// <summary>
    /// Delete 的摘要说明
    /// </summary>
    public class Delete : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            BLL.UserInfoService UserInfoService = CZBK.ItcastProject.Common.CacheControl.Get<BLL.UserInfoService>();
            int id;
            if(int.TryParse(context.Request.QueryString["id"],out id))
            {
                if (UserInfoService.DeleteUserInfo(id))
                {
                    context.Response.Redirect("UserInfoList.aspx");
                }
                else
                {
                    context.Response.Redirect("Error.html");
                }
            }
            else
            {
                context.Response.Redirect("Error.html");
            }
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

6.添加数据

1. runat="server" 服务端控件! 会被.netframework解析成客户端的HTML代码返回给浏览器!但是会自动生成一个隐藏域,name="__ViewState"!这个ViewState用于保持状态连接,存储相关数据!

***IsPostBack:是根据__VIEWSTATE隐藏域进行判断的!

***如果不添加runat="server",则不会自动生成这个隐藏域,name="__ViewState"

2.aspx页面可以接受Get请求或者Post请求!注意:无论是Get请求还是Post请求,都会访问aspx.cs类中的Page_Load方法!!

3.aspx页面区分Get和Post请求:

   a.在form表单中添加一个隐藏域,判断隐藏域的值;aspx.cs类中的Page_load方法中判断隐藏域的值,如果有值说明表单提交,是Post请求,否则为Get请求

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AddUserInfo.aspx.cs" 
    Inherits="CZBK.ItcastProject.WebApp.aspx_Demo.AddUserInfo" %>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" method="post" action="AddUserInfo.aspx" >
    <div>
        用户名:<input type="text" name="txtName" /><br />
        密码:<input type="password" name="txtPwd" /><br />
        邮箱:<input type="text" name="txtMail" /><br />
        <input type="hidden" name="isPostBack" value="aaa" /><!--隐藏域的值用于判断Post请求-->
        <input type="submit" value="添加用户" />
    </div>
    </form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using CZBK.ItcastProject;

namespace CZBK.ItcastProject.WebApp.aspx_Demo
{
    public partial class AddUserInfo : System.Web.UI.Page
    {
        BLL.UserInfoService UserInfoService = new BLL.UserInfoService();
        protected void Page_Load(object sender, EventArgs e)
        {
            //判断 Get,Post请求
            //如果隐藏域的值不为空,表示用户单击了提交按钮发出了POST请求
            if(!string.IsNullOrEmpty(Request.Form["isPostBack"]))
            {
                //post请求
                AddUserInfo_Method();
            }
            else
            {
                //get请求
            }
        }

        private void AddUserInfo_Method()
        {
            Model.UserInfo userinfo = new Model.UserInfo();
            userinfo.UserName = Request.Form["txtName"];
            userinfo.UserPass = Request.Form["txtPwd"];
            userinfo.Email = Request.Form["txtMail"];
            userinfo.RegTime = DateTime.Now;
            if (UserInfoService.AddUserInfo(userinfo))
            {
                Response.Redirect("UserInfoList.aspx");
            }
            else
            {
                Response.Redirect("../Error.html");
            }
        }
    }
}

   

   b.使用服务端的 form表单,runat="server"!可以用IsPostBack来判断是否为Post请求还是Get请求!!!

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AddUserInfo.aspx.cs" 
    Inherits="CZBK.ItcastProject.WebApp.aspx_Demo.AddUserInfo" %>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server" >
    <div>
        用户名:<input type="text" name="txtName" /><br />
        密码:<input type="password" name="txtPwd" /><br />
        邮箱:<input type="text" name="txtMail" /><br />
        <input type="hidden" name="isPostBack" value="aaa" /><!--隐藏域的值用于判断Post请求-->
        <input type="submit" value="添加用户" />
    </div>
    </form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using CZBK.ItcastProject;

namespace CZBK.ItcastProject.WebApp.aspx_Demo
{
    public partial class AddUserInfo : System.Web.UI.Page
    {
        BLL.UserInfoService UserInfoService = new BLL.UserInfoService();
        protected void Page_Load(object sender, EventArgs e)
        {
            //判断 Get,Post请求
            //IsPostBack:如果是POST请求该属性的值为true,如果是GET请求该属性的值为false.

            //IsPostBack:是根据__VIEWSTATE隐藏域进行判断的,如果是POST请求那么该隐藏域的值会提交到服务端,
            //那么IsPostBack属性也就为true.
            //如果将form标签的runat="server"去掉,那么就不能用该属性进行判断是POST请求还是GET请求。
            //因为去掉form标签的runat="server",那么就不会再产生 __VIEWSTATE隐藏域了。
            if(IsPostBack)
            {
                AddUserInfo_Method();
            }
        }

        private void AddUserInfo_Method()
        {
            Model.UserInfo userinfo = new Model.UserInfo();
            userinfo.UserName = Request.Form["txtName"];
            userinfo.UserPass = Request.Form["txtPwd"];
            userinfo.Email = Request.Form["txtMail"];
            userinfo.RegTime = DateTime.Now;
            if (UserInfoService.AddUserInfo(userinfo))
            {
                Response.Redirect("UserInfoList.aspx");
            }
            else
            {
                Response.Redirect("../Error.html");
            }
        }
    }
}

7.更新数据

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="EditUser.aspx.cs" 
    Inherits="CZBK.ItcastProject.WebApp.aspx_Demo.EditUser" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" method="post" action="EditUser.aspx">
    <div>
     用户名:<input type="text" name="txtName" value="<%=EditUserInfo.UserName %>" /><br />
        密码:<input type="text" name="txtPwd" value="<%=EditUserInfo.UserPass %>" /><br />
        邮箱:<input type="text" name="txtMail" value="<%=EditUserInfo.Email %>" /><br />
        <input type="hidden" name="txtId" value="<%=EditUserInfo.Id %>" />
        <input type="hidden" name="txtRegTime" value="<%=EditUserInfo.RegTime %>" />
        <input type="hidden" name="Ispostback" value="aaa" />
        <input type="submit" value="编辑用户" />
    </div>
    </form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using CZBK.ItcastProject;

namespace CZBK.ItcastProject.WebApp.aspx_Demo
{
    public partial class EditUser : System.Web.UI.Page
    {
        BLL.UserInfoService userInfoservice = Common.CacheControl.Get<BLL.UserInfoService>();
        public Model.UserInfo EditUserInfo { get; set; }
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(Request.Form["Ispostback"]))
            {
                EditMethod();//post update
            }
            else
            {
                GetUserInfoMethod();//get 
            }
        }
        private void GetUserInfoMethod()
        {
            int id;
            if (int.TryParse(Request.QueryString["id"], out id))
            {
                Model.UserInfo userinfo = userInfoservice.GetDeail(id);
                if (userinfo != null)
                {
                    EditUserInfo = userinfo;
                }
                else
                    Response.Redirect("../Error.html");
            }
        }
        private void EditMethod()
        {
            Model.UserInfo userinfo = new Model.UserInfo();
            userinfo.UserName = Request.Form["txtName"];
            userinfo.UserPass = Request.Form["txtPwd"];
            userinfo.Email = Request.Form["txtMail"];
            userinfo.Id = Convert.ToInt32(Request.Form["txtId"]);
            userinfo.RegTime = DateTime.Now;
            if (userInfoservice.UpdateUserInfo(userinfo))
            {
                Response.Redirect("UserInfoList.aspx");
            }
            else
                Response.Redirect("../Error.html");
        }
    }
}
原文地址:https://www.cnblogs.com/youguess/p/9264154.html