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 > )
{
return "background-color:red;";
}
else
{
return "";
}
}
}
public string Nation { get; set; }User
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
for (int i = DateTime.Now.Year; i >= ; i--)
{
ListItem li = new ListItem(i.ToString());
Year_Dr.Items.Add(li);
} for (int i = ; i <= ; i++)
{
ListItem li = new ListItem(i.ToString());
Mouth_dr.Items.Add(li);
} Days();
Mouth_dr.SelectedValue = DateTime.Now.Month.ToString();
Day_dr.SelectedValue = DateTime.Now.Day.ToString();
} Year_Dr.SelectedIndexChanged +=Year_Dr_SelectedIndexChanged;
Mouth_dr.SelectedIndexChanged +=Mouth_dr_SelectedIndexChanged;
//方法及事件 private void Days()
{
for (int i = ; i <= ; i++)
{
int year = Convert.ToInt32(Year_Dr.SelectedValue);
int mouth = Convert.ToInt32(Mouth_dr.SelectedValue);
if (mouth == || mouth == || mouth == || mouth == || mouth == || mouth == || mouth == )
{
}
else if (mouth == || mouth == || mouth == || mouth == )
{
if (i == )
{
break;
}
}
else if (year % == || (year % == && year % != ))
{
if (i == )
{
break;
}
}
else
{
if (i == )
{
break;
}
}
ListItem li = new ListItem(i.ToString());
Day_dr.Items.Add(li);
}
} void Mouth_dr_SelectedIndexChanged(object sender, EventArgs e)
{
Day_dr.Items.Clear();
Days(); } void Year_Dr_SelectedIndexChanged(object sender, EventArgs e)
{
Mouth_dr.Items.Clear();
Day_dr.Items.Clear();
for (int i = ; i <= ; i++)
{
ListItem li = new ListItem(i.ToString());
Mouth_dr.Items.Add(li);
} Days();
}
日期
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