不同项目之间的控件共享
上篇blog我有提到,不知如何解决不用项目之间的控件共享问题.很多朋友给予了热心的回答,这里一起表示感谢.
总结大家的回复,一般有2种观点,一是做成用户控件,二是js+css的形式.确实现在这2种方法很多见,各有优点,但也各有缺点.做成用户控件的话,如果每次修改都要发布dll的话,无疑是非常麻烦的,而js+css也是一种非常好的方法,应该很多网站目前都是使用这个方法来共享头部和底部的.js的方法很便捷,但是也缺少一定的灵活性.因为我们不仅仅是共享头尾而已.
比如文章的列表,不同板块的文章会呈现不用的文章和表现形式.他们只是调用的内容和排版上有所不同,而代码方面应该是一致的.这个时候就需要做成用户控件了.那么该如何解决这个问题呢?
我们先设想一下大概思路,不同项目之间共享控件,那么控件就应该做成一个独立的项目,而同一个控件的代码是一样的(就是ascx.cs是一样的),变现不一样(就是ascx不一样).
肯定有朋友会想到了,我们建立多个ascx文件,让他们都继承自同一个ascx.cs不久可以了吗?
恩,没错,确实是这样的思路,但是问题在于,.NET的控件只能被同一个项目所引用,因为他只支持虚拟的相对路径.一旦跨项目引用了就出提示错误.(超出了当先项目虚拟目录的根目录了)
经过我们Google+baidu,发现.net 2.0提供了一些类来实现自己的虚拟文件系统. 这些类在System.Web.Hosting命名空间内定义.我们只要重写VirtualPathProvider、VirtualFile就可以把ascx放在一个统一的地方,然后各个项目都可以调用了.
具体代码如下:
![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
Code
1
public class SkinVirtualPathProvider : VirtualPathProvider
2![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
3![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
4![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
5![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//// <summary>
6![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
7
/// 定义模板路径
8![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
9
/// </summary>
10![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
11
public string VirtualPath
12![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
13![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
14![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
15
get;
16![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
17
set;
18![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
19
}
20![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
21
22![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
23![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//// <summary>
24![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
25
/// 定义扩展名
26![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
27
/// </summary>
28![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
29
public string ExtensionString
30![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
31![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
32![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
33
get;
34![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
35
set;
36![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
37
}
38![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
39
40![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
41
private bool CheckPathInExtension(string virtualPath)
42![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
43![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
44![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
45
return virtualPath.EndsWith(ExtensionString);
46![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
47
}
48![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
49
50![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
51
public override bool FileExists(string virtualPath)
52![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
53![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
54![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
55
return (CheckPathInExtension(virtualPath) || Previous.FileExists(virtualPath));
56![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
57
}
58![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
59
60![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
61
public override VirtualFile GetFile(string virtualPath)
62![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
63![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
64![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
65
if (!CheckPathInExtension(virtualPath))
66![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
67
return base.GetFile(virtualPath);
68![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
69
else
70![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
71![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
72![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
73
return new SkinVirtualFile(this,virtualPath);
74![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
75
}
76![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
77
}
78![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
79
80![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
81
public override CacheDependency GetCacheDependency(string virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart)
82![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
83![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
84![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
85
if (CheckPathInExtension(virtualPath))
86![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
87
return new CacheDependency(this.VirtualPath + "/" + virtualPath);
88![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
89
90![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
91
else
92![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
93
return base.GetCacheDependency(virtualPath, virtualPathDependencies, utcStart);
94![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
95
96![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
97
}
98![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
99
}
100![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
101
102![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
103
104![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
105
public class SkinVirtualFile:VirtualFile
106![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
107![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
108![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
109
string path;
110![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
111
private SkinVirtualPathProvider provider;
112![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
113
114![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
115
public SkinVirtualFile(SkinVirtualPathProvider provider, string virtualPath)
116![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
117
: base(virtualPath)
118![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
119![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
120![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
121
path = provider.VirtualPath + "/" + virtualPath;
122![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
123
this.provider = provider;
124![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
125
}
126![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
127
128![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
129
public override Stream Open()
130![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
131![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
132![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
133
return new FileStream(this.path, FileMode.Open, FileAccess.Read, FileShare.Read);
134![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
135
}
136![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
137
}
138![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
139
140![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
然后在Global里注册一下:
![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
Code
1
public class SkinVirtualPathProvider : VirtualPathProvider
2![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
3![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
4![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
5![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//// <summary>
6![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
7
/// 定义模板路径
8![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
9
/// </summary>
10![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
11
public string VirtualPath
12![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
13![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
14![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
15
get;
16![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
17
set;
18![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
19
}
20![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
21
22![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
23![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//// <summary>
24![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
25
/// 定义扩展名
26![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
27
/// </summary>
28![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
29
public string ExtensionString
30![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
31![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
32![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
33
get;
34![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
35
set;
36![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
37
}
38![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
39
40![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
41
private bool CheckPathInExtension(string virtualPath)
42![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
43![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
44![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
45
return virtualPath.EndsWith(ExtensionString);
46![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
47
}
48![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
49
50![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
51
public override bool FileExists(string virtualPath)
52![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
53![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
54![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
55
return (CheckPathInExtension(virtualPath) || Previous.FileExists(virtualPath));
56![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
57
}
58![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
59
60![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
61
public override VirtualFile GetFile(string virtualPath)
62![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
63![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
64![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
65
if (!CheckPathInExtension(virtualPath))
66![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
67
return base.GetFile(virtualPath);
68![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
69
else
70![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
71![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
72![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
73
return new SkinVirtualFile(this,virtualPath);
74![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
75
}
76![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
77
}
78![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
79
80![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
81
public override CacheDependency GetCacheDependency(string virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart)
82![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
83![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
84![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
85
if (CheckPathInExtension(virtualPath))
86![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
87
return new CacheDependency(this.VirtualPath + "/" + virtualPath);
88![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
89
90![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
91
else
92![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
93
return base.GetCacheDependency(virtualPath, virtualPathDependencies, utcStart);
94![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
95
96![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
97
}
98![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
99
}
100![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
101
102![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
103
104![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
105
public class SkinVirtualFile:VirtualFile
106![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
107![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
108![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
109
string path;
110![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
111
private SkinVirtualPathProvider provider;
112![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
113
114![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
115
public SkinVirtualFile(SkinVirtualPathProvider provider, string virtualPath)
116![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
117
: base(virtualPath)
118![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
119![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
120![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
121
path = provider.VirtualPath + "/" + virtualPath;
122![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
123
this.provider = provider;
124![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
125
}
126![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
127
128![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
129
public override Stream Open()
130![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
131![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
132![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
133
return new FileStream(this.path, FileMode.Open, FileAccess.Read, FileShare.Read);
134![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
135
}
136![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
137
}
138![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
139
140![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
这里扩展名我定义的.skin,这里我们也web.config里也要注册一下
<buildProviders>
<add extension=".skin" type="System.Web.Compilation.UserControlBuildProvider"/>
</buildProviders>
如此这般操作了以后,比如项目中要使用1.skin 就会去 skin目录下去找这个文件了,不再受到虚拟目录的根目录的限制了.
解决这个问题之后,我们就要修改我们的用户控件了,让他会load这个skin里面的内容,然后来做数据的绑定.
具体代码我就不贴了,提供几个参考链接.
参考链接:
1. http://www.cnblogs.com/cricket/articles/25299.html
2. http://www.cnblogs.com/zxjay/archive/2008/11/13/xianfen_net_virtualpathprovider.html
3. http://blog.csdn.net/baoaya/archive/2009/07/27/4384178.aspx
没啥技术含量,主要是想分享一下解决问题的方法和思路,大家见笑了