asp.net mvc 使用nvelocity替换razor

看清楚标题呀 是nvelocity替换razor

背景

我也不知道出于什么考虑，可能是老大说后期要弄到java平台上 然后视图页不要用Razor了。所以就让我用Nvelocity去替换原有的razor。

简单实现

创建一个引擎管理类

public class VelocityManager
{
public static VelocityManager Instance;

public VelocityEngine Engine;

static VelocityManager()
{
Instance = new VelocityManager();
}

private VelocityManager()
{
Engine = new VelocityEngine();
Engine.SetProperty(RuntimeConstants.RESOURCE_LOADER, "file");
string baseDirectory = AppDomain.CurrentDomain.BaseDirectory.Replace("\\", "/");
Engine.SetProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, baseDirectory + "/Views");
Engine.Init();
}
}

创建视图类

public class NVelocityView : IView
{
private string viewPath;
public NVelocityView(string viewPath)
{
this.viewPath = viewPath.Replace("~/Views", "/");
}
public void Render(ViewContext viewContext, TextWriter writer)
{
RouteData data = viewContext.Controller.ControllerContext.RouteData;

Template vltTemplate = VelocityManager.Instance.Engine.GetTemplate(viewPath);
VelocityContext vltContext = new VelocityContext();
vltContext.Put("control", viewContext.ViewBag.control ?? new object());
vltTemplate.Merge(vltContext, writer);

}
}

创建引擎类

public class NVolocityViewEngine : BuildManagerViewEngine
{
public NVolocityViewEngine() : base()
{
ViewLocationFormats = new[]
{
"~/Views/{1}/{0}.cshtml",
"~/Views/Shared/{0}.cshtml",
"~/CustomViewLocation/{1}/{0}.cshtml",
"~/CustomViewLocation/{1}/{0}.vm"
};
}
protected override IView CreatePartialView(ControllerContext controllerContext, string partialPath)
{
return new NVelocityView(partialPath);
}

protected override IView CreateView(ControllerContext controllerContext, string viewPath, string masterPath)
{
return new NVelocityView(viewPath);
}
}

在Global.asax中清楚原有引擎 添加自己的即可

protected void Application_Start()
{
ViewEngines.Engines.Clear();
ViewEngines.Engines.Add(new NVolocityViewEngine());

AreaRegistration.RegisterAllAreas();
GlobalConfiguration.Configure(WebApiConfig.Register);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);

}