Question

我有一个方法

RenderToString(string pathToView, string pathToMasterPage)

，与已经说过的名称一样，呈现视图并将结果作为字符串返回。目前，我必须将路径作为方法的参数传递给母版页。但由于视图本身已经包含母版页的定义

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" %>

我想知道是否可以以编程方式读取此值，以便我不必再将其作为单独的参数传递？

Answer 1

RenderToString方法如下所示：

public virtual string RenderToString(string viewPath, string masterPath)
{
    ControllerContext controllerContext = this.ControllerContext;
    Stream filter = null;
    ViewPage viewPage = new ViewPage();

    viewPage.ViewContext = new ViewContext(this.ControllerContext, new WebFormView(viewPath, masterPath), this.ViewData, this.TempData);

    //get the response context, flush it and get the response filter.
    var response = viewPage.ViewContext.HttpContext.Response;
    response.Flush();
    var oldFilter = response.Filter;

    try
    {
        //put a new filter into the response
        filter = new MemoryStream();
        response.Filter = filter;

        //render the view into the memorystream and flush the response
        viewPage.ViewContext.View.Render(viewPage.ViewContext, viewPage.ViewContext.HttpContext.Response.Output);
        response.Flush();

        //read the rendered view
        filter.Position = 0;
        var reader = new StreamReader(filter, response.ContentEncoding);
        return reader.ReadToEnd();
    }
    finally
    {
        //Clean up.
        if (filter != null)
        {
            filter.Dispose();
        }

        //Now replace the response filter
        response.Filter = oldFilter;
    }
}

这不完美。执行该方法后，您无法再执行任何重定向，因为必须刷新响应，因此已经发送了标头。如果您找到了解决方法，请在此处发布。

.Net MVC：从任何视图读取母版页路径

1 个答案: