autocomplete
autocomplete有两种
一种 是 jquery ui里的 autocomplete http://jqueryui.com/autocomplete/
在这里我使用的是 combobox 这种复合的下拉加输入的方式,其实这个使用相当方便,就是按正常的网页就可以了.
先看一下原代码:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI Autocomplete - Combobox</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css">
<style>
.custom-combobox {
position: relative;
display: inline-block;
}
.custom-combobox-toggle {
position: absolute;
top: 0;
bottom: 0;
margin-left: -1px;
padding: 0;
}
.custom-combobox-input {
margin: 0;
padding: 5px 10px;
}
</style>
<script>
(function( $ ) {
$.widget( "custom.combobox", {
_create: function() {
this.wrapper = $( "<span>" )
.addClass( "custom-combobox" )
.insertAfter( this.element ); this.element.hide();
this._createAutocomplete();
this._createShowAllButton();
}, _createAutocomplete: function() {
var selected = this.element.children( ":selected" ),
value = selected.val() ? selected.text() : ""; this.input = $( "<input>" )
.appendTo( this.wrapper )
.val( value )
.attr( "title", "" )
.addClass( "custom-combobox-input ui-widget ui-widget-content ui-state-default ui-corner-left" )
.autocomplete({
delay: 0,
minLength: 0,
source: $.proxy( this, "_source" )
})
.tooltip({
tooltipClass: "ui-state-highlight"
}); this._on( this.input, {
autocompleteselect: function( event, ui ) {
ui.item.option.selected = true;
this._trigger( "select", event, {
item: ui.item.option
});
}, autocompletechange: "_removeIfInvalid"
});
}, _createShowAllButton: function() {
var input = this.input,
wasOpen = false; $( "<a>" )
.attr( "tabIndex", -1 )
.attr( "title", "Show All Items" )
.tooltip()
.appendTo( this.wrapper )
.button({
icons: {
primary: "ui-icon-triangle-1-s"
},
text: false
})
.removeClass( "ui-corner-all" )
.addClass( "custom-combobox-toggle ui-corner-right" )
.mousedown(function() {
wasOpen = input.autocomplete( "widget" ).is( ":visible" );
})
.click(function() {
input.focus(); // Close if already visible
if ( wasOpen ) {
return;
} // Pass empty string as value to search for, displaying all results
input.autocomplete( "search", "" );
});
}, _source: function( request, response ) {
var matcher = new RegExp( $.ui.autocomplete.escapeRegex(request.term), "i" );
response( this.element.children( "option" ).map(function() {
var text = $( this ).text();
if ( this.value && ( !request.term || matcher.test(text) ) )
return {
label: text,
value: text,
option: this
};
}) );
}, _removeIfInvalid: function( event, ui ) { // Selected an item, nothing to do
if ( ui.item ) {
return;
} // Search for a match (case-insensitive)
var value = this.input.val(),
valueLowerCase = value.toLowerCase(),
valid = false;
this.element.children( "option" ).each(function() {
if ( $( this ).text().toLowerCase() === valueLowerCase ) {
this.selected = valid = true;
return false;
}
}); // Found a match, nothing to do
if ( valid ) {
return;
} // Remove invalid value
this.input
.val( "" )
.attr( "title", value + " didn't match any item" )
.tooltip( "open" );
this.element.val( "" );
this._delay(function() {
this.input.tooltip( "close" ).attr( "title", "" );
}, 2500 );
this.input.autocomplete( "instance" ).term = "";
}, _destroy: function() {
this.wrapper.remove();
this.element.show();
}
});
})( jQuery ); $(function() {
$( "#combobox" ).combobox();
$( "#toggle" ).click(function() {
$( "#combobox" ).toggle();
});
});
</script>
</head>
<body> <div class="ui-widget">
<label>Your preferred programming language: </label>
<select id="combobox">
<option value="">Select one...</option>
<option value="ActionScript">ActionScript</option>
<option value="AppleScript">AppleScript</option>
<option value="Asp">Asp</option>
<option value="BASIC">BASIC</option>
<option value="C">C</option>
<option value="C++">C++</option>
<option value="Clojure">Clojure</option>
<option value="COBOL">COBOL</option>
<option value="ColdFusion">ColdFusion</option>
<option value="Erlang">Erlang</option>
<option value="Fortran">Fortran</option>
<option value="Groovy">Groovy</option>
<option value="Haskell">Haskell</option>
<option value="Java">Java</option>
<option value="JavaScript">JavaScript</option>
<option value="Lisp">Lisp</option>
<option value="Perl">Perl</option>
<option value="PHP">PHP</option>
<option value="Python">Python</option>
<option value="Ruby">Ruby</option>
<option value="Scala">Scala</option>
<option value="Scheme">Scheme</option>
</select>
</div>
<button id="toggle">Show underlying select</button> </body>
</html>
Combobox
上面会有一个熟悉的身影, select optoin .这不是正常的HTML吗,所以这个JS是在网页加载之后进行的操作.这样我们就可以在正常的网页上做修改就可以了.
我使用的是 aspx 页面的 asp:dropdownlist 控件, 其实和 select 控件效果是一样的.
我在后台把数据 绑定 我的控件后,下拉在前台对下面的控件做操作就可以了:
<asp:DropDownList ID="ddl_accountid" runat="server" Style="border-style: none; margin: 0 auto;">
</asp:DropDownList>
操作步骤 :
1 引用jquery ui 插件库
<link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css">
这个没啥好说的:到官方网站去下载就行了．引入的时候注意一个顺序就可以了．还有一个就是下载的文件中有个images 文件夹,这个文件夹要和你引用 jquery-ui.css 放在同一个文件夹下,因为CSS里索引图片是在本文件夹下找 /images/XXXXX.png文件的.
http://jqueryui.com/resources/download/jquery-ui-1.11.4.zip
2 按上面的例子把 代码考入 aspx或者 html 自己的代码段里,把代码里的 #combobox 改成自己的ID #ddl_accountid.(大约在 160 行)
$(function() {
$( "#combobox" ).combobox();
$( "#toggle" ).click(function() {
$( "#combobox" ).toggle();
});
3 几个常用的点
3.1 onchange 事件(大约在 120 行)
_removeIfInvalid: function( event, ui ) {
// Selected an item, nothing to do
if ( ui.item ) {
这里写自己onchage需要处理的事件;
return;
}
3.2 清空事件 (大约在 150 行)
// Remove invalid value this.input .val( "" ) .attr( "title", value + " didn't match any item" ) .tooltip( "open" ); this.element.val( "" ); this._delay(function() { this.input.tooltip( "close" ).attr( "title", "" ); }, 2500 ); this.input.autocomplete( "instance" ).term = "";清空事件可以写在这里.
},