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一、Repeater控件
有五大模板
ItemTemplate :有多少条数据，执行多少遍
AlternatingItemTemplate : 对交替数据项进行格式设置
SeparatorTemplate : 对分隔符进行格式设置
HeaderTemplate : 对页眉进行格式设置 ，在加载开始执行一遍
FooterTemplate : 对页脚进行格式设置，在加载最后执行一遍
1.数据绑定
list<Users> li =new usersData().Select(); Repeater1.DataSource=li; Repeater1.DataBind();
2.属性扩展和数据访问类构建
并判断年龄是不是大于16岁，大于的话背景色变红（库存预警）
public string UserName { get; set; } public string PassWord { get; set; } public string NickName { get; set; } public string NickName1 { get { if (NickName == "") { return "<无>"; } else { return NickName; } } } public bool Sex { get; set; } public string SexStr { get { return Sex ? "男" : "女"; } } public DateTime Birthday { get; set; } public string BirStr { get { return Birthday.ToString("yyyy年MM月dd日"); } } public int Age { get { return DateTime.Now.Year - Birthday.Year; } } public string Red { get { if (Age > 16) { return "background-color:red;"; } else { return ""; } } } public string Nation { get; set; }
3.代码
<asp:Repeater ID="Repeater1" runat="server"> <HeaderTemplate> <table id="tb1"> <tr id="tr_head"> <td>用户名</td> <td>密码</td> <td>昵称</td> <td>性别</td> <td>生日</td> <td>年龄</td> <td>民族</td> </tr> </HeaderTemplate> <ItemTemplate> <tr class="tr_item" style="<%#Eval("Red")%>"> <td><%#Eval("Username") %></td> <td><%#Eval("PassWord") %></td> <td><%#Eval("NickName1") %></td> <td><%#Eval("SexStr") %></td> <td><%#Eval("BirStr") %></td> <td><%#Eval("Age") %></td> <td><%#Eval("Nation") %></td> </tr> </ItemTemplate> <FooterTemplate> </table> </FooterTemplate> </asp:Repeater>
项模板中数据显示：<%# Eval("属性名")%>
4.光棒效果，并且保留原有颜色
<script type="text/javascript">
var oItems = document.getElementsByClassName("tr_item");
for (var i = 0; i < oItems.length; i++)
{
var oldColor = "";
oItems[i].onmouseover = function () {
oldColor = this.style.backgroundColor;
this.style.backgroundColor = "yellow";
};
oItems[i].onmouseout = function () {
this.style.backgroundColor = oldColor;
};
}
</script>
二、webform的三级联动
与winform一样，只不过需把DropDownList的AutoPostBack属性改为True。
*简单日期的编写方法：
用是三个DropDownList分别代表年月日，用for循环进行数据绑定，同时并对日进行判断]
protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { for (int i = DateTime.Now.Year; i >= 1900; i--) { ListItem li = new ListItem(i.ToString()); DropDownList2.Items.Add(li); } for (int i = 1; i <= 12; i++) { ListItem li = new ListItem(i.ToString()); DropDownList3.Items.Add(li); } for (int i = 1; i <= 31; i++) { int year =Convert.ToInt32( DropDownList2.SelectedValue); int mouth = Convert.ToInt32(DropDownList3.SelectedValue); if(mouth==1||mouth==3||mouth==5||mouth==7||mouth==8||mouth==10||mouth==12) { } else if (mouth == 4 || mouth == 6 || mouth ==9 || mouth == 11 ) { if(i==30) { break; } } else if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)) { if(i==29) { break; } } else { if(i==28) { break; } } ListItem li = new ListItem(i.ToString()); DropDownList4.Items.Add(li); } DropDownList3.SelectedValue = DateTime.Now.Month.ToString(); DropDownList4.SelectedValue = DateTime.Now.Day.ToString(); } DropDownList2.SelectedIndexChanged += DropDownList2_SelectedIndexChanged; DropDownList3.SelectedIndexChanged += DropDownList3_SelectedIndexChanged; } void DropDownList3_SelectedIndexChanged(object sender, EventArgs e) { DropDownList4.Items.Clear(); for (int i = 1; i <= 31; i++) { int year = Convert.ToInt32(DropDownList2.SelectedValue); int mouth = Convert.ToInt32(DropDownList3.SelectedValue); if (mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 || mouth == 8 || mouth == 10 || mouth == 12) { } else if (mouth == 4 || mouth == 6 || mouth == 9 || mouth == 11) { if (i == 31) { break; } } else if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)) { if (i == 30) { break; } } else { if (i == 29) { break; } } ListItem li = new ListItem(i.ToString()); DropDownList4.Items.Add(li); } } void DropDownList2_SelectedIndexChanged(object sender, EventArgs e) { DropDownList3.Items.Clear(); DropDownList4.Items.Clear(); for (int i = 1; i <= 12; i++) { ListItem li = new ListItem(i.ToString()); DropDownList3.Items.Add(li); } for (int i = 1; i <= 31; i++) { int year = Convert.ToInt32(DropDownList2.SelectedValue); int mouth = Convert.ToInt32(DropDownList3.SelectedValue); if (mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 || mouth == 8 || mouth == 10 || mouth == 12) { } else if (mouth == 4 || mouth == 6 || mouth == 9 || mouth == 11) { if (i == 30) { break; } } else if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)) { if (i == 29) { break; } } else { if (i == 28) { break; } } ListItem li = new ListItem(i.ToString()); DropDownList4.Items.Add(li); } }
注：
PlaceHolder给文本框添加水印文字；
js代码中window.onload = function () {}为页面加载完成成执行脚本，return false 阻止按钮执行操作
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原文地址：http://www.cnblogs.com/zblc2016/p/5966592.html
