C# 如何保存渲染视图的HTML?
基本上,用户进入页面,生成报告并决定是否保存 如果是,那么我必须将这个html保存为静态html文件 如果是这样的话,那就太好了:C# 如何保存渲染视图的HTML?,c#,html,asp.net-core,C#,Html,Asp.net Core,基本上,用户进入页面,生成报告并决定是否保存 如果是,那么我必须将这个html保存为静态html文件 如果是这样的话,那就太好了: public IActionResult GetReport() { (...) string html = View(model).ToString(); save_to_database(html); return View(model); } 但是,我找到的唯一解决办法是在那个页面上按按钮 它执行如下JavaScript: v
public IActionResult GetReport()
{
(...)
string html = View(model).ToString();
save_to_database(html);
return View(model);
}
但是,我找到的唯一解决办法是在那个页面上按按钮
它执行如下JavaScript:
var html = new XMLSerializer().serializeToString(document);
sendHTMLViaAPI(html);
并通过post将html发送到API
所以,我很好奇是否有C#ish的方法可以做到这一点?在控制器的方法中
还有:这有潜在危险吗?例如,会话内容可以保存在该html文件中,或者用户可以通过API发送非html文件的内容…如果我理解您的意思正确,此解决方案可能就是您想要的:
[HttpPost]
public IActionResult GetHTML()
{
var model = new ModelClass() { Content = "Hi!" };
// or
// return PartialView("GetHTML", model);
return PartialView(nameof(GetHTML), model);
}
在文件GetHTML.cshtml
中:
@model ModelClass
<div>
Content: @Model.Content
</div>
@model模型类
Content:@Model.Content
在客户端,当用户希望以字符串形式获取HTML时,可以尝试使用jquery获取:
$.post('/home/gethtml').done(function (html) {
// html is a string here..
// <div>
// Content: Hi!
// </div>
$('body').append(html);
});
$.post('/home/gethtml').done(函数(html){
//html在这里是一个字符串。。
//
//内容:嗨!
//
$('body').append(html);
});
或创建自定义服务: ViewRender.cs
使用Microsoft.AspNetCore.Http;
使用Microsoft.AspNetCore.Mvc;
使用Microsoft.AspNetCore.Mvc.Abstractions;
使用Microsoft.AspNetCore.Mvc.ModelBinding;
使用Microsoft.AspNetCore.Mvc.Razor;
使用Microsoft.AspNetCore.Mvc.Rendering;
使用Microsoft.AspNetCore.Mvc.ViewFeatures;
使用Microsoft.AspNetCore.Routing;
使用制度;
使用System.IO;
公共类ViewRender:IViewRender
{
私人IRazorViewEngine_viewEngine;
私有ITempDataProvider _tempDataProvider;
私人IServiceProvider_服务提供商;
公共视图渲染(
IRazorViewEngine视图引擎,
ITempDataProvider tempDataProvider,
IServiceProvider服务提供商)
{
_viewEngine=viewEngine;
_tempDataProvider=tempDataProvider;
_服务提供者=服务提供者;
}
公共字符串呈现(字符串名称)
{
var actionContext=GetActionContext();
var viewEngineResult=_viewEngine.FindView(actionContext,name,false);
如果(!viewEngineResult.Success)
{
抛出新的InvalidOperationException(string.Format(“找不到视图”{0}',名称));
}
var view=viewEngineResult.view;
使用(var输出=新的StringWriter())
{
var viewContext=新的viewContext(
行动背景,
看法
新ViewDataDictionary(
metadataProvider:new EmptyModelMetadataProvider(),
modelState:新的ModelStateDictionary())
{
模型=空
},
新的TempDataDictionary(actionContext.HttpContext,_tempDataProvider),
产出,
新的HtmlHelpOptions());
view.RenderAsync(viewContext.GetAwaiter().GetResult();
返回output.ToString();
}
}
公共字符串呈现(字符串名称,TModel模型)
{
var actionContext=GetActionContext();
var viewEngineResult=_viewEngine.FindView(actionContext,name,false);
如果(!viewEngineResult.Success)
{
抛出新的InvalidOperationException(string.Format(“找不到视图”{0}',名称));
}
var view=viewEngineResult.view;
使用(var输出=新的StringWriter())
{
var viewContext=新的viewContext(
行动背景,
看法
新ViewDataDictionary(
metadataProvider:new EmptyModelMetadataProvider(),
modelState:新的ModelStateDictionary())
{
模型
},
新的TempDataDictionary(actionContext.HttpContext,_tempDataProvider),
产出,
新的HtmlHelpOptions());
view.RenderAsync(viewContext.GetAwaiter().GetResult();
返回output.ToString();
}
}
私有ActionContext GetActionContext()
{
var httpContext=new DefaultHttpContext();
httpContext.RequestServices=\u serviceProvider;
返回新的ActionContext(httpContext,new RoutedData(),new ActionDescriptor());
}
}
IViewRender.cs:
公共接口IViewRender
{
字符串呈现(字符串名称);
字符串呈现(字符串名称,TModel模型);
}
Startup.cs:
services.AddTransient();
用法:
public class HomeController : Controller
{
private readonly IViewRender _viewRender { get; set; }
public HomeController(IViewRender viewRender)
{
_viewRender = viewRender;
}
public IActionResult GetHTML()
{
string htmlWithoutModel = _viewRender.Render("Home/GetHTML");
var model = new ModelClass() { Content = "Hi!" };
string htmlWithModel = _viewRender.Render<ModelClass>("Home/GetHTML", model);
//...
}
}
公共类HomeController:控制器
{
私有只读IViewRender _viewRender{get;set;}
公共家庭控制器(IViewRender viewRender)
{
_viewRender=viewRender;
}
public IActionResult GetHTML()
{
字符串htmlWithoutModel=_viewRender.Render(“Home/GetHTML”);
var model=newmodelclass(){Content=“Hi!”};
字符串htmlWithModel=\u viewRender.Render(“Home/GetHTML”,model);
//...
}
}
来自该url的响应副本^
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.AspNetCore.Mvc.ViewEngines;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using System.IO;
using System.Threading.Tasks;
namespace CC.Web.Helpers
{
public static class ControllerExtensions
{
public static async Task<string> RenderViewAsync<TModel>(this Controller controller, string viewName, TModel model, bool partial = false)
{
if (string.IsNullOrEmpty(viewName))
{
viewName = controller.ControllerContext.ActionDescriptor.ActionName;
}
controller.ViewData.Model = model;
using (var writer = new StringWriter())
{
IViewEngine viewEngine = controller.HttpContext.RequestServices.GetService(typeof(ICompositeViewEngine)) as ICompositeViewEngine;
ViewEngineResult viewResult = viewEngine.FindView(controller.ControllerContext, viewName, !partial);
if (viewResult.Success == false)
{
return $"A view with the name {viewName} could not be found";
}
ViewContext viewContext = new ViewContext(
controller.ControllerContext,
viewResult.View,
controller.ViewData,
controller.TempData,
writer,
new HtmlHelperOptions()
);
await viewResult.View.RenderAsync(viewContext);
return writer.GetStringBuilder().ToString();
}
}
}
}
或者这是一个局部视图:
partialViewHtml = await this.RenderViewAsync("Report", model, true);
可能的重复:嗯,8年来没有任何变化?:)抱歉,这是您的目标:将razor页面中的HTML代码转换为字符串吗?@T–nNguyễn将
视图(模型)
转换为字符串(即HTML)。基本上是为用户呈现的页面,我还想保存例如字符串string html=View(model).ToString()
类似这样的东西。是的,这是解决方案之一,但有没有C#方法?e、 g在控制器中保存它method@Joelty我已经更新了一个服务来获取控制器中的HTML字符串。奇怪的是,htmlWithModel
抛出ArgumentOutOfRangeException:索引超出范围。必须为非负数且小于集合的大小。参数名称:index System.Collections.Generic.List.get\u Item(int index)
public class HomeController : Controller
{
private readonly IViewRender _viewRender { get; set; }
public HomeController(IViewRender viewRender)
{
_viewRender = viewRender;
}
public IActionResult GetHTML()
{
string htmlWithoutModel = _viewRender.Render("Home/GetHTML");
var model = new ModelClass() { Content = "Hi!" };
string htmlWithModel = _viewRender.Render<ModelClass>("Home/GetHTML", model);
//...
}
}
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.AspNetCore.Mvc.ViewEngines;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using System.IO;
using System.Threading.Tasks;
namespace CC.Web.Helpers
{
public static class ControllerExtensions
{
public static async Task<string> RenderViewAsync<TModel>(this Controller controller, string viewName, TModel model, bool partial = false)
{
if (string.IsNullOrEmpty(viewName))
{
viewName = controller.ControllerContext.ActionDescriptor.ActionName;
}
controller.ViewData.Model = model;
using (var writer = new StringWriter())
{
IViewEngine viewEngine = controller.HttpContext.RequestServices.GetService(typeof(ICompositeViewEngine)) as ICompositeViewEngine;
ViewEngineResult viewResult = viewEngine.FindView(controller.ControllerContext, viewName, !partial);
if (viewResult.Success == false)
{
return $"A view with the name {viewName} could not be found";
}
ViewContext viewContext = new ViewContext(
controller.ControllerContext,
viewResult.View,
controller.ViewData,
controller.TempData,
writer,
new HtmlHelperOptions()
);
await viewResult.View.RenderAsync(viewContext);
return writer.GetStringBuilder().ToString();
}
}
}
}
viewHtml = await this.RenderViewAsync("Report", model);
partialViewHtml = await this.RenderViewAsync("Report", model, true);