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需要防止程序员的代码结构更改攻击，因为web段的代码有可能会被更改，更改后JS有可能会验证不住
那么，C#端在JS段通过验证的情况下，还需要进行二次验证
<body>
<form id="form1" runat="server">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<asp:Button ID="Button1" runat="server" Text="Button" />
</form>
</body>
<script type="text/javascript"> window.onload = function () {//文档加载完成之后就会触发该事件 document.getElementById("Button1").onclick = function () { //1、将文本框的值取出来看看 var txt1 = document.getElementById("TextBox1").value; //如果空，那么提示不能为空，并且阻止提交 if (/^(13[0-9]|14[0-9]|15[0-9]|18[0-9])\d{8}$/.test(txt1) == false || txt1.length !=11) {//可以网上搜集 document.getElementById("Label1").innerHTML = "手机号码格式有误！"; return false;//阻止提交的 } //如果不为空，那么就直接提交 }; }; </script>
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<body>
<form id="form1" runat="server">
<asp:Repeater ID="Repeater1" runat="server">
<HeaderTemplate>
<table id="tb1">
<tr id="tr_head">
<td>
<input type="checkbox" id="ck_all" /><label for="ck_all">全选</label></td>
<td>用户名</td>
<td>密码</td>
<td>昵称</td>
<td>性别</td>
<td>生日</td>
<td>民族</td>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr class="tr_item">
<td>
<input type="checkbox" class="ck" name="ckk" value="<%#Eval("UserName") %>" />
</td>
<td><%#Eval("UserName") %></td>
<td><%#Eval("PassWord") %></td>
<td><%#Eval("NickName") %></td>
<td><%#Eval("SexStr") %></td>
<td><%#Eval("BirthdayStr") %></td>
<td><%#Eval("NationName") %></td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
<asp:Button ID="Button1" runat="server" Text="Button" />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</form>
</body>
<title></title>
<style type="text/css">
#tb1 {
width:100%;
background-color:#ff6a00;
text-align:center;
}
#tr_head {
color:white;
}
.tr_item {
background-color:#ffd800;
}
</style>
<script type="text/javascript">
window.onload = function () {
/*点击全选 把所有的ck全部选出，for循环遍历*/
document.getElementById("ck_all").onclick = function () {
var oCks = document.getElementsByClassName("ck");
for (var i = 0; i < oCks.length; i++)
{
oCks[i].checked = this.checked;
}
};
/*点击所有的之后，全选也自动选择。先取每一个的点击事件*/
var ckk = document.getElementsByClassName("ck");
for (var i = 0; i < ckk.length; i++)
{
ckk[i].onclick = function () {
var ok = 0;/*默认是0,每点击一下循环全部的ckk*/
for (var j = 0; j < ckk.length; j++)
{
if (ckk[j].checked == true)/*每点击一下把选中的取出*/
{
ok++;
}
}
if (ok == ckk.length) {/*所有ckk的个数和选中的匹配，ck_all选中*/
document.getElementById("ck_all").checked = true;
}
else {
document.getElementById("ck_all").checked = false;
}
};
}
};
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:Repeater ID="Repeater1" runat="server">
<HeaderTemplate>
<table id="tb1">
<tr id="tr_head">
<td><input type="checkbox"id="ck_all" /><label for="ck_all">全选</label></td>
<td>用户名</td>
<td>密码</td>
<td>昵称</td>
<td>性别</td>
<td>生日</td>
<td>民族</td>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr class="tr_item">
<td>
<input type="checkbox" class="ck" name="ckk" value="<%#Eval("UserName") %>" />
</td>
<td><%#Eval("UserName") %></td>
<td><%#Eval("PassWord") %></td>
<td><%#Eval("NickName") %></td>
<td><%#Eval("Ssex") %></td>
<td><%#Eval("Birthday2") %></td>
<td><%#Eval("Nation") %></td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
<asp:Button ID="Button1" runat="server" Text="Button" />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</form>
</body>
protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { Repeater1.DataSource = new UsersDA().Select(); Repeater1.DataBind(); } Button1.Click += Button1_Click; } void Button1_Click(object sender, EventArgs e) { Label1.Text = Request["ckk"].ToString();//点击按钮取出主键值。 string[] unames = Request["ckk"].ToString().Split(‘,‘);//分隔 foreach (string s in unames)//遍历所选的 { new UsersDA().Delete(s); } Repeater1.DataSource = new UsersDA().Select(); Repeater1.DataBind();//删完再重新绑定 }
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原文地址：http://www.cnblogs.com/yp11/p/5913270.html
