asp.net-mvc ASP.NET MVC 从数据库加载 Razor 视图
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ASP.NET MVC load Razor view from database
提问by pbz
ScottGu mentioned that we should be able to load a Razor view from a database(check the comments section), so does anybody have an example on how to do that?
ScottGu 提到我们应该能够从数据库加载 Razor 视图（检查评论部分），那么有人有如何做到这一点的例子吗？
Thanks.
谢谢。
回答by Buildstarted
You might want to check Pulling a View from a database rather than a fileor Using VirtualPathProvider to load ASP.NET MVC views from DLLs
您可能想要检查从数据库而不是文件中拉取视图或使用 VirtualPathProvider 从 DLL 加载 ASP.NET MVC 视图
Taking the code from my previous question on the subject.
从我之前关于该主题的问题中获取代码。
In your FileExists()method on the other page you replace the test code I have there with some db code that actually checks to see if the virtualPath has an entry in your database. Your database would look something like:
在FileExists()另一页的方法中，您将我在那里的测试代码替换为一些实际检查 virtualPath 是否在您的数据库中有条目的 db 代码。您的数据库将类似于：
Views --tablename
Path --view's virtual path
SomeOtherValue
...and your call would then be something like
...然后你的电话会像
public class DbPathProvider : VirtualPathProvider {
public DbPathProvider() : base() {
}
public override bool FileExists(string virtualPath) {
Database db = new Database();
return db.Views.Any(w => w.Path == virtualPath);
}
public override VirtualFile GetFile(string virtualPath) {
return new DbVirtualFile(virtualPath);
}
}
And now we modify the DbVirtualFile
现在我们修改 DbVirtualFile
public class DbVirtualFile : System.Web.Hosting.VirtualFile {
public DbVirtualFile(string path) : base (path) {
}
public override System.IO.Stream Open() {
Database db = new Database();
return new System.IO.MemoryStream(
db.Views.Single(v => v.Path == this.VirtualPath));
}
}
The virtualPath doesn't have to correspond to a real filesystem if you don't want it to. You can override the functionality by implementing these two classes.
如果您不想，virtualPath 不必对应于真实的文件系统。您可以通过实现这两个类来覆盖功能。
You can then register your new VirtualPathProvider in the global.asax like so
然后您可以像这样在 global.asax 中注册您的新 VirtualPathProvider
HostingEnvironment.RegisterVirtualPathProvider(new DbPathProvider());
I hope this better answers your question.
我希望这能更好地回答你的问题。
