目前我有一个带有简单注册表单的 html 网站,这是代码:
<div class="grid_6 push_3 block alpha">
<div class="grid_6 form_block alpha omega">
<label>שם משתמש</label>
</div>
<div class="grid_6 form_block alpha omega">
<input type="text" id="username" name="username" pattern="^\S{4,}$" required />
</div>
<div class="grid_6 alpha omega form_block">
<label>סיסמא</label>
</div>
<div class="grid_6 form_block alpha omega">
<input type="password" id="password" name="password" pattern="^\S{6,}$" required title="סיסמא צריכה להכיל לפחות 6 תווים" />
</div>
<div class="grid_6 alpha omega form_block">
<label>וודא סיסמא</label>
</div>
<div class="grid_6 form_block alpha omega">
<input type="password" id="password2" pattern="^\S{6,}$" required />
</div>
<div class="grid_6 alpha omega form_block">
<label>כתובת אימייל</label>
</div>
<div class="grid_6 form_block alpha omega">
<input id="email" name="email" type="email" required pattern="[^@]+@[^@]+\.[a-zA-Z]{2,6}" />
</div>
<div class="grid_6 alpha omega form_block">
<label>וודא כתובת אימייל</label>
</div>
<div class="grid_6 form_block alpha omega">
<input type="email" id="email2" required pattern="[^@]+@[^@]+\.[a-zA-Z]{2,6}" />
</div>
<div class="grid_6 form_block alpha omega">
<input name="submit" type="submit" onclick="return validateForm()" value="שלח" />
</div>
</div>
(它实际上被包裹在母版页的标签中,这是母版:
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs" Inherits="MasterPage" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<link href="css/reset.css" rel="stylesheet" />
<link href="css/text.css" rel="stylesheet" />
<link href="css/963_9_10_10.css" rel="stylesheet" />
<link href="css/style.css" rel="stylesheet" />
<asp:ContentPlaceHolder ID="head" runat="server">
</asp:ContentPlaceHolder>
</head>
<body dir="rtl">
<form runat="server">
<div class="container_9">
<div class="header grid_9">
<a href="Default.aspx"><h1>סיכומים.נט</h1></a>
</div>
<!-- END HEADER -->
<nav>
<ul class="clearfix grid_6 push_3">
<a href="literature.aspx"> <li class="grid_1 alpha literature">ספרות</li></a>
<a href="language.aspx"> <li class="grid_1 language">לשון</li></a>
<a href="civics.aspx"><li class="grid_1 civics">אזרחות</li></a>
<a href="history.aspx"><li class="grid_1 history">היסטוריה</li></a>
<a href="bible.aspx"> <li class="grid_1 bible">תנך</li></a>
<a href="english.aspx"> <li class="grid_1 omega english">אנגלית</li></a>
</ul>
</nav>
<div class="grid_3 pull_6" id="search">
<input type="text" id="search_box" placeholder="הקלד מילות חיפוש"/>
<input type="submit" value="חפש" id="search_button"/>
</div>
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
<footer class="grid_9">
2013 © כל הזכויות שמורות לסיכומים.נט
</footer>
</div>
<!-- END CONTAINER -->
</form>
</body>
</html>
我还有一个 signup.aspx.cs 文件,它将注册信息插入到数据库中,如下所示:
public partial class signup : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Request.Form["submit"] != null) {
register1();
}
}
public void register1()
{
string sql = "INSERT INTO [userinfo] ([username], [password], [email]) VALUES (N'" + Request.Form["username"] + "', N'" + Request.Form["password"] + "', N'" + Request.Form["email"] + "')";
Database.UpdateData(sql);
}
}
我认为到目前为止我所做的一切都是正确的(我是 html/css 以外的任何事物的初学者)但如果我犯了任何错误,请纠正我。
我现在要做的是在将表单输入数据库之前验证表单输入服务器端。我想检查它是否遵守我的所有规则、字符长度、匹配字段等 - 以及用户名/电子邮件是否尚未被占用。
我目前正在做一些基本的 javascript 验证,但我知道这在安全方面还不够。
关于我现在必须要做的事情的解释(尽可能简单)会很棒。理想情况下,我想返回到注册页面并以可自定义的方式在表单顶部列出错误。
谢谢
最佳答案
RegularExpressionValidator和 CompareValidator将成为您的 friend 。
例如:
<asp:RegularExpressionValidator id="valEmail" ControlToValidate="email"
ValidationExpression="[^@]+@[^@]+\.[a-zA-Z]{2,6}"
EnableClientScript="false" ErrorMessage="The email is invalid!"
runat="server" />
和:
<asp:CompareValidator id="valEmails"
ControlToValidate="email" ControlToCompare="email2" Type="String"
EnableClientScript="false" Text="The email addresses must match!"
runat="server" />
可选地,您可以将它们整齐地包装在 ValidationSummary 中控制。
最后,检查代码隐藏中的 Page.IsValid。
protected void Page_Load(object sender, EventArgs e)
{
if (Request.Form["submit"] != null && Page.IsValid)
{
register1();
}
}
您可以阅读其他验证控件 here .
最后,修复您的 SQL,使其不易受到 SQL 注入(inject)攻击:
string sql = "INSERT INTO [userinfo] ([username], [password], [email]) VALUES (N'" + Request.Form["username"].Replace("'","''") + "', N'" + Request.Form["password"].Replace("'","''") + "', N'" + Request.Form["email"].Replace("'","''") + "')";
关于c# - 使用 asp.net 和 c# 验证服务器端,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16664483/