感谢Paris Polyzos 和他的article。
我在这里重新发布他的代码，以防原帖因任何原因被删除。
在文件viewToString.cs中创建Service，代码如下：
using System;
using System.IO;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Abstractions;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Mvc.Razor;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Routing;
namespace WebApplication.Services
{
public interface IViewRenderService
{
Task<string> RenderToStringAsync(string viewName, object model);
}
public class ViewRenderService : IViewRenderService
{
private readonly IRazorViewEngine _razorViewEngine;
private readonly ITempDataProvider _tempDataProvider;
private readonly IServiceProvider _serviceProvider;
public ViewRenderService(IRazorViewEngine razorViewEngine,
ITempDataProvider tempDataProvider,
IServiceProvider serviceProvider)
{
_razorViewEngine = razorViewEngine;
_tempDataProvider = tempDataProvider;
_serviceProvider = serviceProvider;
}
public async Task<string> RenderToStringAsync(string viewName, object model)
{
var httpContext = new DefaultHttpContext { RequestServices = _serviceProvider };
var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());
using (var sw = new StringWriter())
{
var viewResult = _razorViewEngine.FindView(actionContext, viewName, false);
if (viewResult.View == null)
{
throw new ArgumentNullException($"{viewName} does not match any available view");
}
var viewDictionary = new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary())
{
Model = model
};
var viewContext = new ViewContext(
actionContext,
viewResult.View,
viewDictionary,
new TempDataDictionary(actionContext.HttpContext, _tempDataProvider),
sw,
new HtmlHelperOptions()
);
await viewResult.View.RenderAsync(viewContext);
return sw.ToString();
}
}
}
}
2.将服务添加到Startup.cs文件中，如下：
using WebApplication.Services;
public void ConfigureServices(IServiceCollection services)
{
...
services.AddScoped<IViewRenderService, ViewRenderService>();
}
3. 将"preserveCompilationContext": true 添加到project.json 中的buildOptions，文件如下所示：
{
"version": "1.0.0-*",
"buildOptions": {
"debugType": "portable",
"emitEntryPoint": true,
"preserveCompilationContext": true
},
"dependencies": {
"Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
"Microsoft.AspNetCore.Mvc": "1.0.1"
},
"frameworks": {
"netcoreapp1.0": {
"dependencies": {
"Microsoft.NETCore.App": {
"type": "platform",
"version": "1.0.1"
}
},
"imports": "dnxcore50"
}
}
}
4.定义你model，例如：
public class InviteViewModel {
public string UserId {get; set;}
public string UserName {get; set;}
public string ReferralCode {get; set;}
public int Credits {get; set;}
}
5. 例如，创建您的Invite.cshtml：
@{
ViewData["Title"] = "Contact";
}
@ViewData["Title"].
user id: @Model.UserId
6.在Controller：
a.在开头定义如下：
private readonly IViewRenderService _viewRenderService;
public RenderController(IViewRenderService viewRenderService)
{
_viewRenderService = viewRenderService;
}
b. 调用并返回带有模型的视图，如下所示：
var result = await _viewRenderService.RenderToStringAsync("Email/Invite", viewModel);
return Content(result);
c. 完整的控制器示例，可能如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using WebApplication.Services;
namespace WebApplication.Controllers
{
[Route("render")]
public class RenderController : Controller
{
private readonly IViewRenderService _viewRenderService;
public RenderController(IViewRenderService viewRenderService)
{
_viewRenderService = viewRenderService;
}
[Route("invite")]
public async Task<IActionResult> RenderInviteView()
{
ViewData["Message"] = "Your application description page.";
var viewModel = new InviteViewModel
{
UserId = "cdb86aea-e3d6-4fdd-9b7f-55e12b710f78",
UserName = "Hasan",
ReferralCode = "55e12b710f78",
Credits = 10
};
var result = await _viewRenderService.RenderToStringAsync("Email/Invite", viewModel);
return Content(result);
}
public class InviteViewModel {
public string UserId {get; set;}
public string UserName {get; set;}
public string ReferralCode {get; set;}
public int Credits {get; set;}
}
}