ASP.NET核心将内部带有分部视图的视图呈现为字符串

public async Task<string> RenderPartialViewToString()
{
    var viewData = new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary());
    var tempData = new TempDataDictionary(HttpContext, _tempDataProvider);

    using (var sw = new StringWriter())
    {
        var httpContext = new DefaultHttpContext { RequestServices = _serviceProvider };
        var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());

        var viewEngineResult = _viewEngine.FindView(actionContext, "YourPartialViewName", false);

        if (!viewEngineResult.Success)
        {
            throw new InvalidOperationException($"Couldn't find the partial view 'YourPartialViewName'");
        }

        var view = viewEngineResult.View;

        var viewContext = new ViewContext(
            actionContext,
            view,
            viewData,
            tempData,
            sw,
            new HtmlHelperOptions()
        );

        await view.RenderAsync(viewContext);

        return sw.ToString();
    }
}