ASP.NET MVC：利用ASP.NET MVC4的IBundleTransform集成LESS
背景
LESS确实不错，只是每次写完LESS都要手工编译一下有点麻烦（VS插件一直没有安装好），昨天在官方看到了如何用IBundleTransform集成LESS，今天就记录一下。
参考资料：http://www.asp.net/mvc/tutorials/mvc-4/bundling-and-minification。
代码
LessTransform
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5
6 using System.Web.Optimization;
7
8 namespace LessStudy.Infrastructure
9 {
10 public class LessTransform : IBundleTransform
11 {
12 public void Process(BundleContext context, BundleResponse response)
13 {
14 response.Content = dotless.Core.Less.Parse(response.Content);
15 response.ContentType = "text/css";
16 }
17 }
18 }
BundleConfig中增加如下代码
1 var lessBundle = new Bundle("~/Content/less").IncludeDirectory("~/Content/less", "*.less");
2 lessBundle.Transforms.Add(new LessTransform());
3 lessBundle.Transforms.Add(new CssMinify());
4 bundles.Add(lessBundle);
在模板中引用
1 @Styles.Render("~/Content/less")
顺便说一下LESS的编码
写注释和统一的格式化
1 /*栅格的左边距*/
2 @span_margin: 20px;
3 /*栅格的的宽度*/
4 @span_width: 60px;
5 /*栅格数量*/
6 @span_length: 12;
7 /*像素单位*/
8 @px_unit: 1px;
9
10 /*固定栅格系统*/
11 .row
12 {
13 margin-left: -@span_margin;/*抵消第一个栅格的左边距*/
14 *zoom: 1;
15 }
16
17 [class*="span"]
18 {
19 float: left;
20 min-height:1px;
21 margin-left: @span_margin;
22 }
23
24 .span (@index) when (@index > 0)
25 {
26 .span@{index}
27 {
28 width: (@index * @span_width + (@index - 1) * @span_margin) * @px_unit;
29 }
30
31 .span(@index - 1);
32 }
33
34 .span (0) {}
35
36 .span (@span_length);
37
38 .offset (@index) when (@index > 0)
39 {
40 .offset@{index}
41 {
42 margin-left: (@index * @span_width + (@index + 1) * @span_margin) * @px_unit;
43 }
44
45 .offset(@index - 1);
46 }
47
48 .offset (0) {}
49
50 .offset (@span_length);
51
52
53
54
55 /*自动栅格系统*/
56
57 /*栅格的宽度和左边距之比*/
58 @span_width_margin_scale: 3;
59 /*栅格的左边距比例*/
60 @span_margin_percentage: (1 / (@span_length * (@span_width_margin_scale + 1) - 1));
61
62 .row-fluid
63 {
64 width: 100%;
65 *zoom: 1;
66 }
67
68 .row-fluid [class*="span"]:first-child
69 {
70 margin-left: 0;
71 }
72
73 .row-fluid [class*="span"]
74 {
75 display: block;
76 float: left;
77 min-height: 30px;
78 margin-left: percentage(@span_margin_percentage);
79 -webkit-box-sizing: border-box;
80 -moz-box-sizing: border-box;
81 box-sizing: border-box;
82 }
83
84 .fluid_span (@index) when (@index > 0)
85 {
86 .row-fluid .span@{index}
87 {
88 width: percentage((@index * (@span_width_margin_scale + 1) - 1) * @span_margin_percentage);
89 }
90
91 .fluid_span(@index - 1);
92 }
93
94 .fluid_span (0) {}
95
96 .fluid_span (@span_length);
97
98 .fluid_offset (@index) when (@index > 0)
99 {
100 .row-fluid .offset@{index}
101 {
102 margin-left: percentage((@index * (@span_width_margin_scale + 1) + 1) * @span_margin_percentage);
103 }
104
105 .fluid_offset(@index - 1);
106 }
107
108 .fluid_offset (0) {}
109
110 .fluid_offset (@span_length);
如何利用CSS的智能提示呢？
添加文件的时候选择css，然后修改后缀名为less就行了。
备注
学习HTML+CSS有一周了，今天做个网站试试。
分类: ASP.NET MVC