asp教程.net repeater排序用的控件应用与详解
.aspx页代码
如果使用网站形式，那么将.cs文件放在app_code下，如果是webapplication则随便扔在那个目录下都可以
/----------------导入控件（网站方式--动态编译）--------------------/
<%@ register namespace="f.studio.webcontrols" tagprefix="fs" %>
:也可以在web.config中做个全局配置，这样就不用每个页面引用一次了
/----------------repeater 控件部分--------------------------/
<table style="width:100%;">
<tr>
<td>
<asp:linkbutton id="lnkorderbyclientid" runat="server">id</asp:linkbutton>
</td>
<td>
<asp:linkbutton id="lnkorderbygettime" runat="server" >获得时间</asp:linkbutton> </td>
<td>
<asp:linkbutton id="lnklastconttime" runat="server">最后联系时间</asp:linkbutton> </td>
</tr>
<asp:repeater id="repeater1" runat="server">
<itemtemplate>
<tr>
<td>
<%#eval("id") %></td>
<td>
<%#eval("lastgettime") %></td>
<td>
<%#eval("lastcontcttime") %> </td>
</tr>
</itemtemplate>
</asp:repeater>
</table>
/----------------------控件配置部分--------------------------/
<fs:orderbystatemanager id="orderby" runat="server" defaultorderbysql="client.[clientid]" onchanged="binddataafterorderby">
<fs:sortcolumn field="client.[lastcontacttime]" linkbuttonid="lnklastconttime" />
<fs:sortcolumn field="client.[currusergettime]" linkbuttonid="lnkorderbygettime" />
<fs:sortcolumn field="client.[clientid]" linkbuttonid="lnkorderbyclientid" />
</fs:orderbystatemanager>
控件属性与方法:
1.field-排序字段（可能为空）
2.isasc-排序方向
3.tostring()方法返回排序tsql语句（如:client.[clientid] asc),当field为空时，返回defaultorderbysql指定的语句
排序状态改变时会触发,onchange事件指定的处理函数，通常的处理是进行一次数据绑定， 参考下面代码:
/// <summary>
/// 排序后重新绑订数据
/// </summary>
protected void binddataafterorderby(orderbystatemanager orderby)
{
try
{
binddata();
}
catch (exception ex)
{
jscript.alert(ex.message);
}
}
orderbystatemanger.cs文件
using system;
using system.collections.generic;
using system.linq;
using system.web;
using system.runtime.serialization;
using system.web.ui.webcontrols;
using system.web.ui;
using system.componentmodel;
using system.collections;
using system.drawing.design;
using system.security.permissions;namespace f.studio.webcontrols
{/// <summary>
/// 单列排序结构类
/// </summary>
///
[serializable]
[
aspnethostingpermission(securityaction.demand,
level = aspnethostingpermissionlevel.minimal),
aspnethostingpermission(securityaction.inheritancedemand,
level = aspnethostingpermissionlevel.minimal),
defaultproperty("sortcolumns"),
parsechildren(true, "sortcolumns"),
toolboxdata("<{0}:orderbystatemanager runat="server"> </{0}:orderbystatemanager>")]
public class orderbystatemanager : control
{public event orderbystatechanged changed;
public orderbystatemanager(string field, bool isasc)
{
field = field;
isasc = isasc;
}
public orderbystatemanager()
{}
#region 集合属性
private list<sortcolumn> _sortcolumns;
[
category("behavior"),
description("排序字段与对应控件映射集合"),
designerserializationvisibility(
designerserializationvisibility.content),
editor(typeof(ilist<sortcolumn>), typeof(uitypeeditor)),
persistencemode(persistencemode.innerdefaultproperty)
]
public list<sortcolumn> sortcolumns
{
get
{
if (_sortcolumns == null)
{
_sortcolumns = new list<sortcolumn>();
}
return _sortcolumns;
}
}
#endregion
protected override void onload(eventargs e)
{
base.onload(e);sortcolumns.foreach(column =>
{
var ctr = page.findcontrol(column.linkbuttonid) as linkbutton;
if (ctr != null)
{
addmap(column.field, ctr);
}
});}
/// <summary>
/// sender 需要是 linkbutton类型
/// </summary>
/// <param name="sender"></param>
public void setorderby(object sender)
{var item = fieldtolnkmap.firstordefault(ent => ent.value.equals(sender));
if (item.value == null) throw new exception("集合中没有指定触发排序事件linkbutton项目!");
//顺序:上、下、取消
if (string.isnullorempty(field))
{
isasc = true;
field = item.key;
}
else
{
if (string.compare(field, item.key, true) == 0)//点同一个
{
if (isasc) isasc = false;
else field = string.empty;}
else
{
field = item.key;
isasc = true;
}
}//只支持单个字段排序，清除全部控件的标志
foreach (var kv in fieldtolnkmap)
{
kv.value.text = kv.value.text.trimend("↑,↓".tochararray());
}if (!string.isnullorempty(field))
{
//触发控件加标志
item.value.text += (isasc ? "↑" : "↓");}
if (changed != null)
{
changed(this);
}}
#region 映射集合
public void addmap(string field, linkbutton lnk)
{
lnk.click += orderbylnkclick;fieldtolnkmap.add(field, lnk);
}private void orderbylnkclick(object sender, eventargs e)
{
setorderby(sender);
}private dictionary<string, linkbutton> _fieldtolnkmap;
protected dictionary<string, linkbutton> fieldtolnkmap
{
get
{
if (_fieldtolnkmap == null)
{
_fieldtolnkmap = new dictionary<string, linkbutton>();
}
return _fieldtolnkmap;
}
}
#endregion#region 序列化字段
const string c_field = @"obsm_field";
public string field {
get
{
return viewstate[c_field] as string;
}
set
{
viewstate[c_field] = value;
}
}
const string c_isasc = @"obsm_isasc";
public bool isasc
{
get
{
if (viewstate[c_isasc] == null)
{viewstate[c_isasc] = true;
}return (bool)viewstate[c_isasc];
}
set
{
viewstate[c_isasc] = value;
}}
[
category("behavior"),
defaultvalue(""),
description("默认排序"),
]
private string _defaultorderbysql = string.empty;
public string defaultorderbysql {
get
{
return _defaultorderbysql;
}
set
{
_defaultorderbysql = value;
}
}
public override string tostring()
{
if (string.isnullorempty(field)) return defaultorderbysql;return string.format(" {0} {1} ", field, isasc ? "asc" : "desc");
}
#endregion
}
public delegate void orderbystatechanged(orderbystatemanager orderby);[serializable]
[typeconverter(typeof(expandableobjectconverter))]
public class sortcolumn
{
public sortcolumn()
{}
[
category("behavior"),
defaultvalue(""),
description("排序字段"),
notifyparentproperty(true),
]
public string field { get; set; }[
category("behavior"),
defaultvalue(""),
description("linkbutton控件id"),
notifyparentproperty(true),
]
public string linkbuttonid { get; set; }
}
}