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Repeater和Webform注册

一、注册
1、日期
(1)年月日用三DropDownList个,分别循环写入数字

代码写在后台

        Page_Load中的代码

if (IsPostBack == false)
{

       //年绑定数据
            for (int i = DateTime.Now.Year; i >= 1900; i--)
            {
                ListItem li = new ListItem(i.ToString());
                DropDownList5.Items.Add(li);
            }
            //月绑定数据
            for (int i = 1; i <= 12; i++)
            {
                ListItem li = new ListItem(i.ToString());
                DropDownList6.Items.Add(li);
            }
            //日绑定数据
            rizi();
}

//年改变事件
DropDownList5.SelectedIndexChanged += DropDownList5_SelectedIndexChanged;
//月改变事件
DropDownList6.SelectedIndexChanged += DropDownList6_SelectedIndexChanged;

//日绑定数据函数
    private void rizi()
    {
        int m = Convert.ToInt32(DropDownList6.SelectedValue);
        int mm = Convert.ToInt32(DropDownList5.SelectedValue);
        int rq = new panriqi().riqi(m, mm);
        for (int i = 1; i <= rq; i++)
        {
            ListItem li = new ListItem(i.ToString());
            DropDownList7.Items.Add(li);
        }
    }
//年改变事件
    void DropDownList5_SelectedIndexChanged(object sender, EventArgs e)
    {
        rizi();
    }
    //月改变事件
    void DropDownList6_SelectedIndexChanged(object sender, EventArgs e)
    {
        rizi();
    }

调用的类

public int riqi(int m,int mm) //传入年和月
    {
        int ri=0;
        if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12)
        {
            ri = 31;
        }
        else if (m == 4 || m == 6 || m == 9 || m == 11)
        {
            ri = 30;
        }
        else if (m == 2)
        {
            
            if (mm % 4 == 0 && mm % 100 != 0 || mm % 400 == 0)
            {
                ri = 29;
            }
            else
            {
                ri = 28;
            }
        }
        return ri;
    }

(2)年月日取值

string s = DropDownList5.SelectedValue + "-" + DropDownList6.SelectedValue + "-" + DropDownList7.SelectedValue;
        u.Birthday = Convert.ToDateTime(s);

2、水印 placeHolder
3、JS验证

//验证用户名
var duname = false; document.getElementById("TextBox1").onblur = function () { if (document.getElementById("TextBox1").value =http://www.mamicode.com/="") { document.getElementById("Label1").innerText = "不能为空!"; } else { duname = true; document.getElementById("Label1").innerText = ""; } }
//注册按钮
document.getElementById("Button1").onclick = function () { if (!duname || !dupwd || !dupwd2 || !dunicheng || !dup || !duyou || !duyz) { alert("请确认是否全部填写正确!"); return false;//后面的代码不执行 }

4、三级联动 
(1)修改一个属性:AutoPostBack

二、Repeater重复器
四个模板:
HeaderTemplate: 在加载开始执行一遍
ItemTemplate : 有多少条数据,执行多少遍
FooterTemplate :在加载最后执行一遍
AlternatingItemTemplate : 交替项模板
1、用table展示数据库中的数据

<asp:Repeater ID="Repeater1" runat="server">           
           <HeaderTemplate>//头模板
              <table id="tb1">
//标题 <tr id="tr_head"> <td>用户名</td> <td>密 码</td> <td>昵称</td> <td>性别</td> <td>出生日期</td> <td>年龄</td> <td>电话</td> <td>邮箱</td> <td>民族</td> <td>地区</td> </tr>
</HeaderTemplate> <ItemTemplate>//项模板 <tr class="tr_item" style="<%#Eval("red") %>">//red标红 <td><%#Eval("UserName") %></td> <td><%#Eval("PassWord") %></td> <td><%#Eval("NickName") %></td> <td><%#Eval("sexstr ") %></td> <td><%#Eval("bir") %></td> <td><%#Eval("Age") %></td> <td><%#Eval("Phone") %></td> <td><%#Eval("Email") %></td> <td><%#Eval("nationstr") %></td> <td><%#Eval("Areastr") %></td> </tr> </ItemTemplate> <FooterTemplate>//尾模板 </table> </FooterTemplate> </asp:Repeater>

2、属性扩展在实体类中
3、标红(实体类中属性扩展)

//性别为女标红
public string red { get { if(!_Sex) { return ""; } else { return ""; } } }

4、光棒效果(JS)

window.onload = function () {
        var oItems = document.getElementsByClassName("tr_item");
        for (var i = 0; i < oItems.length; i++) {
            var oldColor = "";
            oItems[i].onmouseover = function () {
//记录修改前的颜色
oldColor = this.style.backgroundColor;
this.style.backgroundColor = "yellow"; }; 
oItems[i].onmouseout = function ()
{ this.style.backgroundColor = oldColor; }; }

Repeater和Webform注册