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)
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2、
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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?")
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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
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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
<%@ 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
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:
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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";
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8、验证控件
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(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)
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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"; }
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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
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(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
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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
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(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
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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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