在 .NET Core 中将视图作为字符串返回 [英] Return View as String in .NET Core
问题描述
我发现了一些关于如何在 ASP.NET 中将视图返回到字符串的文章，但无法隐藏任何内容以便能够使用 .NET Core 运行它
I found some article how to return view to string in ASP.NET, but could not covert any to be able to run it with .NET Core
public static string RenderViewToString(this Controller controller, string viewName, object model)
{
var context = controller.ControllerContext;
if (string.IsNullOrEmpty(viewName))
viewName = context.RouteData.GetRequiredString("action");
var viewData = new ViewDataDictionary(model);
using (var sw = new StringWriter())
{
var viewResult = ViewEngines.Engines.FindPartialView(context, viewName);
var viewContext = new ViewContext(context, viewResult.View, viewData, new TempDataDictionary(), sw);
viewResult.View.Render(viewContext, sw);
return sw.GetStringBuilder().ToString();
}
}
假设能够使用以下方法从控制器调用:
which assumed to be able to call from a Controller using:
var strView = this.RenderViewToString("YourViewName", yourModel);
当我尝试将上述内容运行到 .NET Core 中时，我遇到了很多编译错误.
When I try to run the above into .NET Core I get lots of compilation errors.
我尝试将其转换为与 .NET Core 一起使用，但失败了，任何人都可以帮助提及所需的 using .. 和所需的 dependencies":{"Microsoft.AspNetCore.Mvc": "1.1.0",...}, 用于project.json.
I tried to convert it to work with .NET Core, but failed, can anyone help with mentioning the required using .. and the required "dependencies": {
"Microsoft.AspNetCore.Mvc": "1.1.0",
...
}, to be used in the project.json.
some other sample codes are here and here and here
注意我需要在 .NET Core 中将视图转换为 string 的解决方案，无论转换的是相同的代码还是其他可以做到的方式.
NOTE
I need the solution to get the view converted to string in .NET Core, regardless same code got converted, or another way that can do it.
推荐答案
感谢 Paris Polyzos 和他的文章.
我在这里重新发布他的代码，以防万一原始帖子因任何原因被删除.
I'm re-posting his code here, just in case the original post got removed for any reason.
在文件viewToString.cs中创建Service如下代码:
Create Service in file viewToString.cs as below code:
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:
2. Add the service to the Startup.cs file, as:
using WebApplication.Services;
public void ConfigureServices(IServiceCollection services)
{
...
services.AddScoped<IViewRenderService, ViewRenderService>();
}
3.在project.json中的buildOptions中添加"preserveCompilationContext": true，这样文件看起来像:
3. Add "preserveCompilationContext": true to the buildOptions in the project.json, so the file looks like:
{
"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.定义你的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. 创建您的 Invite.cshtml 例如:
@{
ViewData["Title"] = "Contact";
}
@ViewData["Title"].
user id: @Model.UserId
6. 在 Controller 中:
a. 在开头定义以下内容:
a. Define the below at the beginning:
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:
b. Call and return the view with model as below:
var result = await _viewRenderService.RenderToStringAsync("Email/Invite", viewModel);
return Content(result);
c. 完整的控制器示例，可能是这样的:
c. The FULL controller example, could be like:
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;}
}
}
这篇关于在 .NET Core 中将视图作为字符串返回的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
