ASP.NET Core 后台方法中解析视图(View)获取生成的html字符串
时间:2022-08-24
1、添加将视图(View)生成html字符串的扩展方法
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 >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(); } } } }
2、上面RenderViewAsync扩展方法的使用方法
1)对于View视图使用代码
viewHtml = await this.RenderViewAsync("Report", model);
2)对于PartialView视图使用代码
partialViewHtml = await this.RenderViewAsync("Report", model, true);
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