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1.为什么要用ActiveX?
网页本身的功能是有限的,要想实现一些网页本身不支持的功能,比如:网页上的p2p视频播放,就得靠ActiveX这种古老的技术。
2.c#能开发ActiveX吗?
严格意义上讲,c#是不能生成纯正ocx控件的,我们在vs.net中新建项目时,也找不到专门的"ActiveX项目"新建项,最多也只就能新建"类库"得到一个dll而非ocx(因此我们也无法用传统的regsvr32来注册该dll),但是c#能开发com组件,activeX控件本质上讲跟com是一类技术,所以用c#开发"能够让网页调用的com类库"还是可行的。
3.开发步骤:
(1)新建一个类库
(2)修改项目的"属性",在“生成”选项中把“输出”中的“为com互操作注册”勾中,然后再到“应用程序”选项中找到“程序集信息”按钮,点击它,在弹出的界面中勾中“使程序集COM可见(M)”


(3)修改AssemblyInfo.cs,增加[assembly: AllowPartiallyTrustedCallers()],完整内容类似下面这样:
<div class="cnblogs_code"><div class="cnblogs_code_hide">1 using System.Reflection;
2 using System.Runtime.CompilerServices;
3 using System.Runtime.InteropServices;
4 using System.Security;
5
6 // General Information about an assembly is controlled through the following
7 // set of attributes. Change these attribute values to modify the information
8 // associated with an assembly.
9 [assembly: AssemblyTitle("ActiveXDemo")]
10 [assembly: AssemblyDescription("")]
11 [assembly: AssemblyConfiguration("")]
12 [assembly: AssemblyCompany("Microsoft")]
13 [assembly: AssemblyProduct("ActiveXDemo")]
14 [assembly: AssemblyCopyright("Copyright ? Microsoft 2009")]
15 [assembly: AssemblyTrademark("")]
16 [assembly: AssemblyCulture("")]
17 [assembly: AllowPartiallyTrustedCallers()]
18
19 // Setting ComVisible to false makes the types in this assembly not visible
20 // to COM components. If you need to access a type in this assembly from
21 // COM, set the ComVisible attribute to true on that type.
22 [assembly: ComVisible(true)]
23
24 // The following GUID is for the ID of the typelib if this project is exposed to COM
25 [assembly: Guid("bd585d12-7f22-4b3f-959f-18efbfc53f94")]
26
27 // Version information for an assembly consists of the following four values:
28 //
29 // Major Version
30 // Minor Version
31 // Build Number
32 // Revision
33 //
34 // You can specify all the values or you can default the Build and Revision Numbers
35 // by using the '*' as shown below:
36 // [assembly: AssemblyVersion("1.0.*")]
37 [assembly: AssemblyVersion("1.0.0.0")]
38 [assembly: AssemblyFileVersion("1.0.0.0")] |
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