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ASP.NET笔记之 控件与母板的区别分析

时间:2021-07-01 10:21:17 帮助过:5人阅读

1、ASP.NET的好坏处

CodeBehind:“前aspx后cs”的模式,
(1、aspx(控件定义、html、css)控制页面长相,cs控制程序逻辑
aspx就是模板引擎,不需要再去寻找第三方的模板引擎
(2、aspx中调用cs的成员级别必须是protected或者public不能是private
因为当前this执行的是当前的子类(通过反编译查看)

2、

Literal:
Mode属性,避免XSS攻击

TextBox:
AutopostBack=true 焦点离开Textbox提交表单
ASP.NET中经常不直接调用submit而是调用_doPostBack方法提交表单
TestChanged事件配合AutopostBack可以点击submit自动提交表单更新输入文本

Button:OnCLientClick
return confirm("真的要执行吗?")

3、Button、LinkButton、ImageButton让多个控件共享一个处理函数:
command属性设置响应函数
CommandArgument=“daomul”(命令参数传参数)
CommandName=“Remove”(名字)

4、

Panal:
弄成"高级设置"(fieldset)的渲染形式:GroupingText=“高级设置”

HyperLink:引用站内内部资源的时候很方便(自动转换路径)
NavigateUrl属性

5、

FileUpload:
FileUploadl.HasFile:用户是否选择了文件
FileUploadl.SaveAs("根目录全路径"):
Server.Mapath或者VirtualPathUtility.ToAbsolute都可以
path=Server.Mapath(“~/upload/”);

漏洞:(只允许上传指定类型的文件)

System.IO.File.Delete(Server.Mapath.("~/upload/"));
System.IO.File.ReadAllText(Server.Mapath.("~/upload/"));

6、实例:注册界面

Register.aspx
代码如下:
 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Register.aspx.cs" Inherits="登陆注册.Register" %>

<!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">

<body>
    <form id="form1" runat="server">
    <div>
        <table border="0" cellpadding="0" cellspacing="0">
            <tr>
                <td>
                    <asp:Label ID="LabelName" runat="server" Text="姓名"></asp:Label>
                </td>
                <td>
                    <asp:TextBox ID="txtUserName" runat="server" AutoPostBack="True"
                        ontextchanged="txtUserName_TextChanged"></asp:TextBox>
                    <asp:Label ID="errorMsg" runat="server"
                            Text="Label" CssClass="error" Visible="False"></asp:Label>
                </td>
            </tr>

           <tr>
                <td>
                    <asp:Label ID="Label2" runat="server" Text="密码"></asp:Label>
                </td>
                <td>
                    <asp:TextBox ID="txtPassWord" runat="server"></asp:TextBox>
                    密码强度:
                    <span id="spanPassWord" ></span>
                </td>
            </tr>

            <tr>
                <td>
                    <asp:Label ID="Label3" runat="server" Text="重复输入密码"></asp:Label>
                </td>
                <td>
                    <asp:TextBox ID="txtPassWord_Second" runat="server"></asp:TextBox>
                </td>
            </tr>

            <tr>
                <td>
                    <asp:Label ID="Label4" runat="server" Text="邮箱"></asp:Label>
                </td>
                <td>
                    <asp:TextBox ID="txtEmail" runat="server"></asp:TextBox>
                </td>
            </tr>

            <tr>
                <td>
                    <asp:Button ID="btnRegister" runat="server" Text="注册"
                        onclick="btnRegister_Click" />
                </td>
            </tr>
            <tr>
                <td>
                    <asp:Label ID="LabelErrorMsg" runat="server" Visible="False"></asp:Label>
                </td>
            </tr>
        </table>
    </div>
    </form>
</body>
<head id="Head1" runat="server">
    <style type="text/css">
        .error{background:Red;}
    </style>
    <title>注册用户</title>
    <script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(function () {
            $("#<%=txtPassWord.ClientID %>").blur(function () {
                var str = $(this).val();
                if (str.length <= 6) {
                    $("#spanPassWord").text("弱");
                }
                else {
                    //含有数字、字母
                    var check = /\w/;
                    if (check.test(str)) {
                        $("#spanPassWord").text("强");
                    }
                    else {
                        $("#spanPassWord").text("中");
                    }
                }

            });
            $("#<%=form1.ClientID %>").submit(function () {
                var pas1 = $("#<%=txtPassWord.ClientID %>").val();
                var pas2 = $("#<%=txtPassWord_Second.ClientID %>").val();
                if (pas1 != pas2) {
                    alert("两次输入密码不一致,请重新输入");
                    return;
                }
                var sEmail = $("#<%=txtEmail.ClientID %>").val();
                var check = /.+@.+/;
                if (!check.test(sEmail)) {
                    alert("邮箱格式不正确,请重新输入");
                    return;
                }
            });
        });</script>
</head>
</html>
 
Register.apsx.cs
代码如下:
using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Web;
 using System.Web.UI;
 using System.Web.UI.WebControls;
 using 登陆注册.DAL.DataSet1TableAdapters;
 using System.Text.RegularExpressions;

 namespace 登陆注册
 {
     public partial class Register : System.Web.UI.Page
     {
         protected void Page_Load(object sender, EventArgs e)
         {

         }

         protected void btnRegister_Click(object sender, EventArgs e)
         {
             //服务器版测试是否符合要求:邮箱饿坏密码
             if (txtPassWord.Text != txtPassWord_Second.Text)
             {
                 LabelErrorMsg.Text = "密码不一致!";
                 LabelErrorMsg.Visible = true;
                 return;
             }
             Regex reEmail = new Regex(@".+@.+");
             if (!reEmail.IsMatch(txtEmail.Text))
             {
                 LabelErrorMsg.Text = "Email格式不正确!";
                 LabelErrorMsg.Visible = true;
                 return;
             }
             LabelErrorMsg.Visible = false;
             T_userInfoTableAdapter adapter = new T_userInfoTableAdapter();
             if (adapter.GetDataByUserName(txtUserName.Text).Count >= 1)
             {
                 errorMsg.Visible = true;
                 errorMsg.Text = "用户名重复,请重新输入!";
                 return;
             }
             long userId=Convert.ToInt64(adapter.InsertUser(txtUserName.Text, txtPassWord.Text,
                 txtEmail.Text));
             //读取Session登陆信息
             Session["登陆ID"] = userId;
             Session["登陆标记"] = true;
             //设置可以传参数的公共跳转页面
             //作用1:告诉用户注册成功,作用2:防止用户点击刷新重复提交数据
             Response.Redirect("target.aspx?Msg=注册成功即将转向登陆界面&RedirectURL=login.aspx");
         }

         protected void txtUserName_TextChanged(object sender, EventArgs e)
         {
             T_userInfoTableAdapter adapter = new T_userInfoTableAdapter();
             if (adapter.GetDataByUserName(txtUserName.Text).Count >= 1) {
                 errorMsg.Visible = true;
                 errorMsg.Text = "用户名重复,请重新输入!";
             }
             else{
                 errorMsg.Visible = false;
             }
         }
     }
 }

其中要用到的正则表达式:

插入数据记录:INSERT INTO [dbo].[T_userInfo] ([sUserName], [sPassWord], [Email])  output Inserted.Id VALUES (@sUserName, @sPassWord, @Email)

(1、增加SQL语句,

(2、增加一个output Insert.Id 在Insert语句当中
(3、设置ExecuteMode属性为Scalar

7、三种控件的区别:html控件、服务端控件。runat=server 的控件(最好)

a1.Attributes("aaa")="建属性赋值";

8、验证控件

(1、 RequiredFieldVal:
设置哪个控件和显示名称(还有CausesValdation焦点移开) -----为空
初始值:InitleValue(请输入关键字、包括下拉框的初始值)

Validator共性
!!!!!!!!!!
if(!IsValid){return;}
if(this.IsValid){//防止跳过客户端校验IsValid表示页面中所有Validator是否都通过了
label1.Text="";
}
else{
label1.Text="客户端填写不足或有错误";
}

ValidstionGroup 分组(表单可以在页面内单个组提交,而不关联其他组)相同于按钮的name

(2、RangeValidator:范围验证
最大最小比较
    Date.Now.()baidu下

(3、只有RequiredFieldValidator可以对字段为空进行验证

(4、CompareValidator:比较验证(类型校验、与其他控件比较、)
       ControlToCompare设置为要比较的控件

RegularExpression:

VaildationExpression 正则表达式验证

CustomVaildate自定义控件验证

ServerValidate服务端校验代码
ClientVlidtionFunction

(5、ValidationSummary汇总错误信息
text 和ErrorMsg的区别,ErrorMsg就是用于ValidationSummary中,
而text则是直接显示在验证控件位置

 

 母版:

//操作模板页的控件
Button btn=(Button)this.Master.FindControl("Button1");
btn.Visible=!btn.Vissble;

this.Master.Mapath();

虚拟路径转化为客户端访问的路径(不是服务端控件):
src="<%=ResolveClientUrl%>"

this.ResolveClientUrl();
ResolveClientUrl:考虑当前页面的路径
ResolveUrl:生成一个从根开始的路径

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