一、.Net Core Mvc下获得
建立一个帮助类,如下:
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.AspNetCore.Mvc.ViewEngines;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
namespace NetCorePortal.Models
{
public class ViewHtmlHelper
{
public static string ConvertToString(Controller controller, string viewName, object viewModel, bool isMainPage)
{
controller.ViewData.Model = viewModel;
using (StringWriter sw = new StringWriter())
{
IViewEngine viewEngine = controller.HttpContext.RequestServices.GetService(typeof(ICompositeViewEngine)) as ICompositeViewEngine;
ViewEngineResult viewEngineResult = viewEngine.FindView(controller.ControllerContext, viewName, isMainPage);
if (viewEngineResult.Success)
{
ViewContext viewContext = new ViewContext(
controller.ControllerContext,
viewEngineResult.View,
controller.ViewData,
controller.TempData,
sw,
new HtmlHelperOptions()
);
viewEngineResult.View.RenderAsync(viewContext);
return sw.GetStringBuilder().ToString();
}
else
{
return $"视图{viewName}不存在";
}
}
}
}
}
后台调用方法
public ContentResult ViewToStringDemo()
{
string strView = ViewHtmlHelper.ConvertToString(this, "Index", "", true);
return Content(strView);
}
二、.Net Mvc下获得
/// <summary>
/// 获得LayTreeGrid视图的HTML内容
/// </summary>
/// <returns></returns>
public ContentResult ViewText()
{
string html = string.Empty;
IView view = ViewEngines.Engines.FindView(this.ControllerContext, "LayTreegrid", null).View;
ViewDataDictionary vdd = new ViewDataDictionary();
TempDataDictionary tdd = new TempDataDictionary();
using (System.IO.StringWriter sw = new System.IO.StringWriter())
{
ViewContext viewContext = new ViewContext(this.ControllerContext, view, vdd, tdd, sw);
viewContext.View.Render(viewContext, sw);
html = sw.ToString();
}
return Content(html);
}